Hi all,

If you are coming to Buxton, take a look at the song matrix as we
still have gaps for players.

http://www.ukmgnational.org.uk

If you have friends or relatives coming who are not NG regulars and
who might not see this note, please can you look after them and make
sure that they reach out for assistance? Da Manglement has not the
time to chase everything down individually.

Fanks,

Nige.

"Nige"  wrote in message 
news:ace0f162-410e-4db5-87dc-a0a316ac5a51@a7g2000yqo.googlegroups.com...
> Hi all,
>
> If you are coming to Buxton, take a look at the song matrix as we
> still have gaps for players.
>
> http://www.ukmgnational.org.uk
>

On the subject of Da Matrix,
It hasn't escaped my attention that the songs are sorted and listed 
alphabetically.
Does that mean that the running order will be alphabetical or will they be 
jumbled up at a later date?

On 12 Oct, 14:45, "Dave Benj"  wrote:
> "Nige"  wrote in message
>
> news:ace0f162-410e-4db5-87dc-a0a316ac5a51@a7g2000yqo.googlegroups.com...
>
> > Hi all,
>
> > If you are coming to Buxton, take a look at the song matrix as we
> > still have gaps for players.
>
> >http://www.ukmgnational.org.uk
>
> On the subject of Da Matrix,
> It hasn't escaped my attention that the songs are sorted and listed
> alphabetically.
> Does that mean that the running order will be alphabetical or will they be
> jumbled up at a later date?

Everybody asks this. It's very hard to please everyone because many
participants are attracted to the idea of getting blazing drunk. For
many, this is an impediment to playing a musical instrument. However,
some sort of decision has to be reached.

I have a pragmatic method for mixing up the matrix that I will not
reveal due to the high probablity of getting unworkable special
requests and all sorts of cute matrix manipulation. Suffice to say
that the running order will not be as listed right now.

Tough love,

Nige.

"Nige"  wrote in message 
news:93f91292-3473-493c-ae38-9ee569f27bff@v25g2000yqk.googlegroups.com...
> On 12 Oct, 14:45, "Dave Benj"  wrote:
>> "Nige"  wrote in message
>>
>> news:ace0f162-410e-4db5-87dc-a0a316ac5a51@a7g2000yqo.googlegroups.com...
>>
>> > Hi all,
>>
>> > If you are coming to Buxton, take a look at the song matrix as we
>> > still have gaps for players.
>>

>> Does that mean that the running order will be alphabetical or will they 
>> be
>> jumbled up at a later date?
>

> I have a pragmatic method for mixing up the matrix that I will not
> reveal due to the high probablity of getting unworkable special
> requests and all sorts of cute matrix manipulation.

Okay. I only asked!
"Pragmatic Method" = you are going to draw the titles out of a hat aren't 
you? :-)

"Nige"  wrote in message 
news:93f91292-3473-493c-ae38-9ee569f27bff@v25g2000yqk.googlegroups.com...
> Suffice to say
> that the running order will not be as listed right now.

Pleased to hear it!

Steve.

On 12 Oct, 16:44, "Steve Robinson"
 wrote:
> "Nige"  wrote in message
>
> news:93f91292-3473-493c-ae38-9ee569f27bff@v25g2000yqk.googlegroups.com...
>
> > Suffice to say
> > that the running order will not be as listed right now.
>
> Pleased to hear it!
>
> Steve.

As am I - or rather, as is my voice :-)

Ross.

In article ,
 "Dave Benj"  wrote:

> "Nige"  wrote in message 
> news:93f91292-3473-493c-ae38-9ee569f27bff@v25g2000yqk.googlegroups.com...
> > On 12 Oct, 14:45, "Dave Benj"  wrote:
> >> "Nige"  wrote in message
> >>
> >> news:ace0f162-410e-4db5-87dc-a0a316ac5a51@a7g2000yqo.googlegroups.com...
> >>
> >> > Hi all,
> >>
> >> > If you are coming to Buxton, take a look at the song matrix as we
> >> > still have gaps for players.
> >>
> 
> >> Does that mean that the running order will be alphabetical or will they 
> >> be
> >> jumbled up at a later date?
> >
> 
> > I have a pragmatic method for mixing up the matrix that I will not
> > reveal due to the high probablity of getting unworkable special
> > requests and all sorts of cute matrix manipulation.
> 
> Okay. I only asked!
> "Pragmatic Method" = you are going to draw the titles out of a hat aren't 
> you? :-) 

Nope. Simon Cowell is doing the final running order.

-- 
Nige.
snowman1@molars.yetitracks.org.uk
Remove the teeth from my email address to reply

"Nige"  wrote in message 
news:snowman1-70D494.17570312102009@news.zen.co.uk...
> In article ,
> "Dave Benj"  wrote:
>
>> "Nige"  wrote in message
>> news:93f91292-3473-493c-ae38-9ee569f27bff@v25g2000yqk.googlegroups.com...
>> > On 12 Oct, 14:45, "Dave Benj"  wrote:
>> >> "Nige"  wrote in message
>> >>
>> >> news:ace0f162-410e-4db5-87dc-a0a316ac5a51@a7g2000yqo.googlegroups.com...
>> >>
>> >> > Hi all,
>> >>
>> >> > If you are coming to Buxton, take a look at the song matrix as we
>> >> > still have gaps for players.
>> >>
>>
>> >> Does that mean that the running order will be alphabetical or will 
>> >> they
>> >> be
>> >> jumbled up at a later date?
>> >
>>
>> > I have a pragmatic method for mixing up the matrix that I will not
>> > reveal due to the high probablity of getting unworkable special
>> > requests and all sorts of cute matrix manipulation.
>>
>> Okay. I only asked!
>> "Pragmatic Method" = you are going to draw the titles out of a hat aren't
>> you? :-)
>
> Nope. Simon Cowell is doing the final running order.

That's it then  - I'm f#cked!

Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
individual 9v adapters. I'm going to buy a couple more pedals soon so 
I've started thinking of getting a single power source. Can anyone 
recommend a good power source with the juice to power, say, 10 pedals 
(so I can scale upwards later)? I heard that 'daisy chaining' from a 
regular adapter degraded the quality of some effects so I'm wary of this 
approach.

Are the board solutions any good, like the Behringer PB600?

Cheers.

On 12 Oct, 16:56, "John A." <joh...@invalid.invalid> wrote:
> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off
> individual 9v adapters. I'm going to buy a couple more pedals soon so
> I've started thinking of getting a single power source. Can anyone
> recommend a good power source with the juice to power, say, 10 pedals
> (so I can scale upwards later)? I heard that 'daisy chaining' from a
> regular adapter degraded the quality of some effects so I'm wary of this
> approach.
>
> Are the board solutions any good, like the Behringer PB600?
>
> Cheers.

If your supply can deliver the current then daisy-chaining is an
effective method.  A single 9V Boss PSU is only designed to run one
pedal, so running a chain ain't gonna work properly :-)

I've tried the DC power brick from Maplin (good, but only 5 outputs)
and also powered boards (from Warwick) but my best solution so far has
been the supply from www.johnnyshredfreak.com

OK, it's nowhere near the same quality as something from Voodoo Labs
or TRex but it does the job!

HTH,


Ross.
--
www.rossedwards.net

Ross Edwards wrote:
> On 12 Oct, 16:56, "John A." <joh...@invalid.invalid> wrote:
>> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off
>> individual 9v adapters. I'm going to buy a couple more pedals soon so
>> I've started thinking of getting a single power source. Can anyone
>> recommend a good power source with the juice to power, say, 10 pedals
>> (so I can scale upwards later)? I heard that 'daisy chaining' from a
>> regular adapter degraded the quality of some effects so I'm wary of
>> this approach.
>>
>> Are the board solutions any good, like the Behringer PB600?
>>
>> Cheers.
>
> If your supply can deliver the current then daisy-chaining is an
> effective method.  A single 9V Boss PSU is only designed to run one
> pedal, so running a chain ain't gonna work properly :-)
>
> I've tried the DC power brick from Maplin (good, but only 5 outputs)
> and also powered boards (from Warwick) but my best solution so far has
> been the supply from www.johnnyshredfreak.com
>
> OK, it's nowhere near the same quality as something from Voodoo Labs
> or TRex but it does the job!
>

I use this one too, but I bought some patch cables from them recently & 
noticed the DC PSU is no longer listed.

In article 
,
 Ross Edwards  wrote:

> On 12 Oct, 16:56, "John A." <joh...@invalid.invalid> wrote:
> > Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off
> > individual 9v adapters. I'm going to buy a couple more pedals soon so
> > I've started thinking of getting a single power source. Can anyone
> > recommend a good power source with the juice to power, say, 10 pedals
> > (so I can scale upwards later)? I heard that 'daisy chaining' from a
> > regular adapter degraded the quality of some effects so I'm wary of this
> > approach.
> >
> > Are the board solutions any good, like the Behringer PB600?
> >
> > Cheers.
> 
> If your supply can deliver the current then daisy-chaining is an
> effective method.  A single 9V Boss PSU is only designed to run one
> pedal, so running a chain ain't gonna work properly :-)
> 
> I've tried the DC power brick from Maplin (good, but only 5 outputs)
> and also powered boards (from Warwick) but my best solution so far has
> been the supply from www.johnnyshredfreak.com
> 
> OK, it's nowhere near the same quality as something from Voodoo Labs
> or TRex but it does the job!
> 
> HTH,
> 
> 
> Ross.
> --
> www.rossedwards.net

Diago do a very nice one for not much money. 
<http://www.diago.co.uk/pedal-power/pedal-power/>

Nige.

-- 
Nige.
snowman1@molars.yetitracks.org.uk
Remove the teeth from my email address to reply

"Ross Edwards"  wrote in message 
news:5f277a07-51fb-4ea5-a560-0cfd6f6510af@v36g2000yqv.googlegroups.com...

> A single 9V Boss PSU is only designed to run one
> pedal, so running a chain ain't gonna work properly

Unless you only want to use one pedal at a time :-)

You've set me off now - I think I'll build my own..

I'm not an electrician, but at a guess:

7809 (9v) regulator bolted to a heat sink.
Something like a 12V 2A transformer (should be enough for 4 pedals at once)
Bridge rectifier
a few assorted capacitors and diodes
a fuse
a dpst switch (switch both sides of the mains supply on and off - always 
safer)
a box
some wire
a few plugs

Add a couple of hours swearing at burns acquired from soldering iron and 
Bob's yer Aunty's live-in lover.

Trev Ridney will be along in a moment to point a finger at me, laugh, and 
tell me that I'm about to blow myself up
:-)

On 12 Oct, 17:22, Ross Edwards  wrote:
> On 12 Oct, 16:56, "John A." <joh...@invalid.invalid> wrote:
>
> > Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off
> > individual 9v adapters. I'm going to buy a couple more pedals soon so
> > I've started thinking of getting a single power source. Can anyone
> > recommend a good power source with the juice to power, say, 10 pedals
> > (so I can scale upwards later)? I heard that 'daisy chaining' from a
> > regular adapter degraded the quality of some effects so I'm wary of this
> > approach.
>
> > Are the board solutions any good, like the Behringer PB600?
>
> > Cheers.
>
> If your supply can deliver the current then daisy-chaining is an
> effective method.  A single 9V Boss PSU is only designed to run one
> pedal, so running a chain ain't gonna work properly :-)
>
> I've tried the DC power brick from Maplin (good, but only 5 outputs)
> and also powered boards (from Warwick) but my best solution so far has
> been the supply fromwww.johnnyshredfreak.com
>
> OK, it's nowhere near the same quality as something from Voodoo Labs
> or TRex but it does the job!
>
> HTH,
>
> Ross.
> --www.rossedwards.net

The Maplin box is huge, for something that only powers 5 pedals, and
the cables are only a single polarity and boss style. Any other type
of pedals you'll need to get your soldering iron out.

I have the smaller warwick pedal board, which only powers 4 pedal
IIRC, but can adjust the cables for different connector types and has
an fx loop.  However the supplied PSU is quite low on the amperage
front, stick a couple of Digitech pedals on there and it will
struggle.

I've used the Johnny Shred Freak one with a daisy chain cable and can
confirm it works very well.  Take care of the daisy chain and it
shouldn't cause any problems.  But remember if one bit of the cable
gets damaged, it may knock everything else out.

Greg

Dave Benj  wrote:

> "Ross Edwards"  wrote in message 
> news:5f277a07-51fb-4ea5-a560-0cfd6f6510af@v36g2000yqv.googlegroups.com...
> 
> > A single 9V Boss PSU is only designed to run one
> > pedal, so running a chain ain't gonna work properly
> 
> Unless you only want to use one pedal at a time :-)
> 
> You've set me off now - I think I'll build my own..
> 
> I'm not an electrician, but at a guess:
> 
> 7809 (9v) regulator bolted to a heat sink.
> Something like a 12V 2A transformer (should be enough for 4 pedals at once)
> Bridge rectifier
> a few assorted capacitors and diodes
> a fuse
> a dpst switch (switch both sides of the mains supply on and off - always
> safer)
> a box
> some wire
> a few plugs
> 
> Add a couple of hours swearing at burns acquired from soldering iron and
> Bob's yer Aunty's live-in lover.
> 
> Trev Ridney will be along in a moment to point a finger at me, laugh, and
> tell me that I'm about to blow myself up
> :-)

You are not going to blow yourself up, but the 7809 has a 1A rating, so
something is going to go bang :-)

Also when you get past its 1A rating on a big heat sink you get a lot of
noise (electricaly speaking) out of it

-- 
Woody

www.alienrat.com

"John A." <john_a@invalid.invalid> wrote in message 
news:havjj3$ogk$1@news.eternal-september.org...
> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
> individual 9v adapters. I'm going to buy a couple more pedals soon so I've 
> started thinking of getting a single power source. Can anyone recommend a 
> good power source with the juice to power, say, 10 pedals (so I can scale 
> upwards later)? I heard that 'daisy chaining' from a regular adapter 
> degraded the quality of some effects so I'm wary of this approach.
>
> Are the board solutions any good, like the Behringer PB600?
>
> Cheers.

I have the Behringer PB600 and the Boss BCB60 , both run 6 pedals no problem 
but the PSU on the BOSS is a bit less noisy. If you want a relatively quiet 
PSU keep away from switch mode PSU's (like the afore mentioned) and try to 
get one that is transformer based, properly rectified and smoothed.

Shame you can't get 9v lead acid batteries to daisy chain off (I've only 
seen 6 and 12v), that would be a silent supply with enough juice to last 
days.

http://www.maplin.co.uk/Module.aspx?ModuleNo=19363

Andrew(lefty)

"Ross Edwards"  wrote in message 
news:5f277a07-51fb-4ea5-a560-0cfd6f6510af@v36g2000yqv.googlegroups.com...

> I've tried the DC power brick from Maplin (good, but only 5 outputs)
> and also powered boards (from Warwick) but my best solution so far has
> been the supply from www.johnnyshredfreak.com

Don't think he's doing a DC PSU any more, or he's hidden it.

icarusi
--

remove the 00 to reply

"Andrew(lefty)"  wrote in message 
news:I%NAm.2519$KR3.1841@text.news.virginmedia.com...
>
> "John A." <john_a@invalid.invalid> wrote in message 
> news:havjj3$ogk$1@news.eternal-september.org...
>> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
>> individual 9v adapters. I'm going to buy a couple more pedals soon so 
>> I've started thinking of getting a single power source. Can anyone 
>> recommend a good power source with the juice to power, say, 10 pedals (so 
>> I can scale upwards later)? I heard that 'daisy chaining' from a regular 
>> adapter degraded the quality of some effects so I'm wary of this 
>> approach.
>>
>> Are the board solutions any good, like the Behringer PB600?
>>
>> Cheers.
>
> I have the Behringer PB600 and the Boss BCB60 , both run 6 pedals no 
> problem but the PSU on the BOSS is a bit less noisy. If you want a 
> relatively quiet PSU keep away from switch mode PSU's (like the afore 
> mentioned) and try to get one that is transformer based, properly 
> rectified and smoothed.
>
> Shame you can't get 9v lead acid batteries to daisy chain off (I've only 
> seen 6 and 12v), that would be a silent supply with enough juice to last 
> days.
>
> http://www.maplin.co.uk/Module.aspx?ModuleNo=19363
>
> Andrew(lefty)


The chemistry of a lead-acid cell gives it a voltage of around 2 V (as you 
probably know); hence the multiples of 2 V.  I'm a bit surprised the output 
of a switch-mode supply can't be adequately smoothed though.  What sort of 
noises are being experienced? ... buzzes?

Chris

"christofire"  wrote in message 
news:WOmdnYUnB_DaIk7XnZ2dnUVZ8sKdnZ2d@bt.com...
>
> "Andrew(lefty)"  wrote in message 
> news:I%NAm.2519$KR3.1841@text.news.virginmedia.com...
>>
>> "John A." <john_a@invalid.invalid> wrote in message 
>> news:havjj3$ogk$1@news.eternal-september.org...
>>> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
>>> individual 9v adapters. I'm going to buy a couple more pedals soon so 
>>> I've started thinking of getting a single power source. Can anyone 
>>> recommend a good power source with the juice to power, say, 10 pedals 
>>> (so I can scale upwards later)? I heard that 'daisy chaining' from a 
>>> regular adapter degraded the quality of some effects so I'm wary of this 
>>> approach.
>>>
>>> Are the board solutions any good, like the Behringer PB600?
>>>
>>> Cheers.
>>
>> I have the Behringer PB600 and the Boss BCB60 , both run 6 pedals no 
>> problem but the PSU on the BOSS is a bit less noisy. If you want a 
>> relatively quiet PSU keep away from switch mode PSU's (like the afore 
>> mentioned) and try to get one that is transformer based, properly 
>> rectified and smoothed.
>>
>> Shame you can't get 9v lead acid batteries to daisy chain off (I've only 
>> seen 6 and 12v), that would be a silent supply with enough juice to last 
>> days.
>>
>> http://www.maplin.co.uk/Module.aspx?ModuleNo=19363
>>
>> Andrew(lefty)
>
>
> The chemistry of a lead-acid cell gives it a voltage of around 2 V (as you 
> probably know); hence the multiples of 2 V.  I'm a bit surprised the 
> output of a switch-mode supply can't be adequately smoothed though.  What 
> sort of noises are being experienced? ... buzzes?
>
> Chris

... but maybe it's not so much a matter of smoothing the voltage that 
appears between the + and - outputs of a switch-mode supply, but 
'common-mode' issues to do with the fact that both + and - lines are doing 
something a bit pulse-like relative to earth.

Chris

"christofire"  wrote in message 
news:WOmdnYUnB_DaIk7XnZ2dnUVZ8sKdnZ2d@bt.com...
>
> "Andrew(lefty)"  wrote in message 
> news:I%NAm.2519$KR3.1841@text.news.virginmedia.com...
>>
>> "John A." <john_a@invalid.invalid> wrote in message 
>> news:havjj3$ogk$1@news.eternal-september.org...
>>> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
>>> individual 9v adapters. I'm going to buy a couple more pedals soon so 
>>> I've started thinking of getting a single power source. Can anyone 
>>> recommend a good power source with the juice to power, say, 10 pedals 
>>> (so I can scale upwards later)? I heard that 'daisy chaining' from a 
>>> regular adapter degraded the quality of some effects so I'm wary of this 
>>> approach.
>>>
>>> Are the board solutions any good, like the Behringer PB600?
>>>
>>> Cheers.
>>
>> I have the Behringer PB600 and the Boss BCB60 , both run 6 pedals no 
>> problem but the PSU on the BOSS is a bit less noisy. If you want a 
>> relatively quiet PSU keep away from switch mode PSU's (like the afore 
>> mentioned) and try to get one that is transformer based, properly 
>> rectified and smoothed.
>>
>> Shame you can't get 9v lead acid batteries to daisy chain off (I've only 
>> seen 6 and 12v), that would be a silent supply with enough juice to last 
>> days.
>>
>> http://www.maplin.co.uk/Module.aspx?ModuleNo=19363
>>
>> Andrew(lefty)
>
>
> The chemistry of a lead-acid cell gives it a voltage of around 2 V (as you 
> probably know); hence the multiples of 2 V.  I'm a bit surprised the 
> output of a switch-mode supply can't be adequately smoothed though.  What 
> sort of noises are being experienced? ... buzzes?
>
> Chris

In my experience it's hummmmmmmmmmmmmmmmm - and seems to be a prticular 
problem with Boss pedlas (which mine all are).

So I'm still using and old Ross power supply I've had for years, and powers 
5 pedals with no complaint. And no noise.

FWIW I bought a Korg psu advertised by Thomann as being suitable for Boss 
units, and that produces hummmmmmmm. Grrrr.

Back to Mr Ross for now - but I know it won't last forever :-(

Rog

On 13 Oct, 00:37, "icarusi"  wrote:
> "Ross Edwards"  wrote in message
>
> news:5f277a07-51fb-4ea5-a560-0cfd6f6510af@v36g2000yqv.googlegroups.com...
>
> > I've tried the DC power brick from Maplin (good, but only 5 outputs)
> > and also powered boards (from Warwick) but my best solution so far has
> > been the supply fromwww.johnnyshredfreak.com
>
> Don't think he's doing a DC PSU any more, or he's hidden it.
>
> icarusi

I know he gets them made to order... maybe he's just run out and is
waiting for a new delivery?  His inventory seems to change every
day...

Ross.

"Woody"  wrote in message 
news:1j7hnxm.b7ud8o1ivdookN%usenet@alienrat.co.uk...

> You are not going to blow yourself up, but the 7809 has a 1A rating, so
> something is going to go bang :-)

That's quite alright.
I have an NVQ in Theatrical Pyrotechnics - I'm qualified to make things go 
bang :-)

"Woody"  wrote in message 
news:1j7hnxm.b7ud8o1ivdookN%usenet@alienrat.co.uk...

>
> You are not going to blow yourself up, but the 7809 has a 1A rating,


LM338 instead then.

"Ross Edwards"  wrote in message 
news:4f9b8b4e-b327-411c-b180-

>> Don't think he's doing a DC PSU any more, or he's hidden it.
>>
>> icarusi
>
> I know he gets them made to order... maybe he's just run out and is
> waiting for a new delivery?  His inventory seems to change every
> day...

If you see any, let us know. I was about to point somebody else there a 
while ago but there were none then either.

icarusi
--

remove the 00 to reply

On 2009-10-12 16:56:17 +0100, "John A." <john_a@invalid.invalid> said:

> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
> individual 9v adapters. I'm going to buy a couple more pedals soon so 
> I've started thinking of getting a single power source. Can anyone 
> recommend a good power source with the juice to power, say, 10 pedals 
> (so I can scale upwards later)? I heard that 'daisy chaining' from a 
> regular adapter degraded the quality of some effects so I'm wary of 
> this approach.
> 
> Are the board solutions any good, like the Behringer PB600?
> 
> Cheers.

I've been looking into this too. I haven't made up my mind yet, but the 
two most appealing seem to be the 'Visual Sound 1 Spot' and the Gigrig 
in terms of budget vs functionality.

1 Spot:
<http://www.visualsound.net/index.php/products/pedal_power_supplies/1_spot_power_supply>

gets 

conflicting reviews on Harmony Central, but also seems to have steadily 
improved over the years.  DV247.com has the combo pack (ie leads etc) 
for £24.99 plus shipping.

Gigrig Generator looks like all the power you'd ever need, but it's 
more expensive.
<http://www.thegigrig.com/acatalog/TheGigRig_GENERATOR.html>
£76.99 with a four week waiting list at gigrig.com

Must admit, I'm tempted by the Gigrig because I got a Gigrig 
distributor thrown in when I bought a pedal board on Ebay recently. The 
included power supply was just a generic 500mA regulator though, so I 
need a replacement or addition.

Not sure I understand the difference between switchers and 
transformers. I'ts not just a holier than thou analog vs digital is it?




    Jim

-- 

50th Anniversary Edition
http://www.jamesbisset.com/

"JimmyB"  wrote in message 
news:2009101421232916807-spam@jazzrascalscom...
> On 2009-10-12 16:56:17 +0100, "John A." <john_a@invalid.invalid> said:
>
. . snip . .

> Not sure I understand the difference between switchers and transformers. 
> I'ts not just a holier than thou analog vs digital is it?
>
>    Jim


No it isn't.  In the common type of switch-mode power supply, the AC mains 
is rectified and charges a capacitor with about 320 volts and that is 
applied to a high-frequency transformer through a switching transistor (or 
two).  The secondary of the transformer provides lower voltage(s) as 
high-frequency AC which is then rectified and smoothed in the usual way (but 
using special high-frequency components) to give the desired DC output(s). 
A benefit over a 'linear' power supply is that the transformer is working at 
a much higher frequency so its core can be made of lightweight ferrite 
material instead of iron plates.  Other benefits include greater efficiency 
than a linear supply, smaller size for the same power output and less chance 
of acoustic noise.  A possible drawback for audio use is that the switching 
circuitry can produce interference that can propagate around the system if 
not properly contained.

Chris

On 12 Oct, 19:20, "Dave Benj"  wrote:
> "Ross Edwards"  wrote in message
>
> news:5f277a07-51fb-4ea5-a560-0cfd6f6510af@v36g2000yqv.googlegroups.com...
>
> > A single 9V Boss PSU is only designed to run one
> > pedal, so running a chain ain't gonna work properly
>
> Unless you only want to use one pedal at a time :-)
>
> You've set me off now - I think I'll build my own..
>
> I'm not an electrician, but at a guess:
>
> 7809 (9v) regulator bolted to a heat sink.
> Something like a 12V 2A transformer (should be enough for 4 pedals at once)
> Bridge rectifier
> a few assorted capacitors and diodes
> a fuse
> a dpst switch (switch both sides of the mains supply on and off - always
> safer)
> a box
> some wire
> a few plugs
>
> Add a couple of hours swearing at burns acquired from soldering iron and
> Bob's yer Aunty's live-in lover.
>
> Trev Ridney will be along in a moment to point a finger at me, laugh, and
> tell me that I'm about to blow myself up
> :-)

The Voodoo labs 2  has each output isolated and has ground loop
isolation as well so there's no danger of one box killing the rest or
bizarre hum. However its mega expensive, but basically the best.
Theres a Custon Shop Audio MXR one that's also fairly expensive.

I use 4 of the Maplin ones, the newer ones have 6 or 7 outputs and for
20 quid they do the job.

If I was more concerned (or rich) I'd fork out for the voodoo it seems
to be what all the big names use.

P

On 2009-10-15 13:24:05 +0100, "christofire"  said:

> 
> "JimmyB"  wrote in message
> news:2009101421232916807-spam@jazzrascalscom...
>> On 2009-10-12 16:56:17 +0100, "John A." <john_a@invalid.invalid> said:
>> 
> . . snip . .
> 
>> Not sure I understand the difference between switchers and transformers.
>> I'ts not just a holier than thou analog vs digital is it?
>> 
>> Jim

<snip>

> A possible drawback for audio use is that the switching
> circuitry can produce interference that can propagate around the system if
> not properly contained.
> 
> Chris

thanks for that Chris. And that might explain why the 1Spot comes with 
an extra long lead from power supply to board - to keep any threat of 
interference at bay?

Jim


-- 

50th Anniversary Edition
http://www.jamesbisset.com/blog/

"JimmyB"  wrote in message 
news:2009101603032416807-spam@jazzrascalscom...
> On 2009-10-15 13:24:05 +0100, "christofire"  
> said:
>
>>
>> "JimmyB"  wrote in message
>> news:2009101421232916807-spam@jazzrascalscom...
>>> On 2009-10-12 16:56:17 +0100, "John A." <john_a@invalid.invalid> said:
>>>
>> . . snip . .
>>
>>> Not sure I understand the difference between switchers and transformers.
>>> I'ts not just a holier than thou analog vs digital is it?
>>>
>>> Jim
>
> <snip>
>
>> A possible drawback for audio use is that the switching
>> circuitry can produce interference that can propagate around the system 
>> if
>> not properly contained.
>>
>> Chris
>
> thanks for that Chris. And that might explain why the 1Spot comes with an 
> extra long lead from power supply to board - to keep any threat of 
> interference at bay?
>
> Jim


Possibly.  Those cylindrical black lumps on output leads are a giveaway - 
ferrite common-mode chokes, intended to stop high-frequency noise from 
propagating down the lead, and added in order to fulfil EU/ETSI/CE 
requirements for 'conducted interference' or suchlike.

Chris

"John A." <john_a@invalid.invalid> wrote in message 
news:havjj3$ogk$1@news.eternal-september.org...
> Hi dudes. I have a Fulltone OCD and a Boss TU-2, both powered off 
> individual 9v adapters. I'm going to buy a couple more pedals soon so I've 
> started thinking of getting a single power source. Can anyone recommend a 
> good power source with the juice to power, say, 10 pedals (so I can scale 
> upwards later)? I heard that 'daisy chaining' from a regular adapter 
> degraded the quality of some effects so I'm wary of this approach.
>
> Are the board solutions any good, like the Behringer PB600?

How about this?
http://www.andertons.co.uk/PowerSupplies/pid9393/cid591/PowerbankDC910WayEffectsPedalPowerSupply.asp

George

On 2009-10-17 10:15:05 +0100, "George Weston" 
 said:
> 
> How about this?
> http://www.andertons.co.uk/PowerSupplies/pid9393/cid591/PowerbankDC910WayEffectsPedalPowerSupply.asp

George

Bugger. 
> 
I've just ordered a Gigrig Generator.

Googling Powerbank DC9 seems to come up with different products, so 
it's difficult to nail the spec. but as i'm looking to drive around 10 
pedals, I'm not convinced it would be powerful enough - despite the 
claim.

Jim


-- 

50th Anniversary Edition
http://www.jamesbisset.com/blog/

"Jose de las Heras"  wrote in message 
news:7k09bfF37drc3U1@mid.individual.net...
>
> "JimmyB"  wrote in message 
> news:2009101802423716807-spam@jazzrascalscom...
>> On 2009-10-17 10:15:05 +0100, "George Weston" 
>>  said:
>>>
>>> How about this?
>>> http://www.andertons.co.uk/PowerSupplies/pid9393/cid591/PowerbankDC910WayEffectsPedalPowerSupply.asp
>>
>> George
>>
>> Bugger.
>>>
>> I've just ordered a Gigrig Generator.
>>
>> Googling Powerbank DC9 seems to come up with different products, so it's 
>> difficult to nail the spec. but as i'm looking to drive around 10 pedals, 
>> I'm not convinced it would be powerful enough - despite the claim.
>>
>> Jim
>
> all 10 pedals at once?
>
> I've assembled about 8-9 pedals for different purposes, but I'd rarely 
> have more than 3 at the same time, and never all at once, so my power 
> requirements are not for 8-9 pedals (in terms of amperage). How about you?
>
> Jose
> -- 


Most guitar effects pedals draw the same current whether they're active or 
bypassed - switching the power with the footswitch would be likely to cause 
pops or other noises - the power is switched when the pedal is unplugged. 
However, devices with simple circuits like distortion and filters don't draw 
much current; it's digital ones and ones that use BBDs that are the more 
power hungry.

Chris

On 2009-10-18 11:33:21 +0100, "Jose de las Heras"  said:

> all 10 pedals at once?
> 
> I've assembled about 8-9 pedals for different purposes, but I'd rarely have
> more than 3 at the same time, and never all at once, so my power
> requirements are not for 8-9 pedals (in terms of amperage). How about you?
> 
> Jose

Must admit, the same thing occurred to me when i was sniffing around 
after the powerbank, but with some of the pedals buffered...

OK, be honest - it's just variation of GAS.

Jim


-- 

50th Anniversary Edition
http://www.jamesbisset.com/blog/

"JimmyB"  wrote in message 
news:2009102003463216807-spam@jazzrascalscom...
> On 2009-10-18 11:33:21 +0100, "Jose de las Heras"  
> said:
>
>> all 10 pedals at once?
>>
>> I've assembled about 8-9 pedals for different purposes, but I'd rarely 
>> have
>> more than 3 at the same time, and never all at once, so my power
>> requirements are not for 8-9 pedals (in terms of amperage). How about 
>> you?
>>
>> Jose
>
> Must admit, the same thing occurred to me when i was sniffing around after 
> the powerbank, but with some of the pedals buffered...
>
> OK, be honest - it's just variation of GAS.
>
> Jim


Yeah, christofire put me right about that... so only the true mechanical 
bypass pedals would not draw current when off, right? (that's a lot of them 
these days, another trend, but still a minority). I guess my pedals are not 
very power hungry.

GAS for power supplies? boring... but if they has a blue led... ah, then I 
could be excited about that ;-)

Jose
-- 
www.mcnach.com

Richt Hoat Chillis:
http://www.myspace.com/rhcpscot  - Bass: OLP MM2
http://www.freakmusic.co.uk/scotland/bands/the_richt_hoat_chillis

www.myspace.com/purplenoise68
-
Current favourite guitar: Fender 'Sambora' Stratocaster
Current favourite bass: Warwick Corvette $$

"JimmyB"  wrote in message 
news:2009101802423716807-spam@jazzrascalscom...
> On 2009-10-17 10:15:05 +0100, "George Weston" 
>  said:
>>
>> How about this?
>> http://www.andertons.co.uk/PowerSupplies/pid9393/cid591/PowerbankDC910WayEffectsPedalPowerSupply.asp
>
> George
>
> Bugger.
>>
> I've just ordered a Gigrig Generator.
>
> Googling Powerbank DC9 seems to come up with different products, so it's 
> difficult to nail the spec. but as i'm looking to drive around 10 pedals, 
> I'm not convinced it would be powerful enough - despite the claim.
>
> Jim

all 10 pedals at once?

I've assembled about 8-9 pedals for different purposes, but I'd rarely have 
more than 3 at the same time, and never all at once, so my power 
requirements are not for 8-9 pedals (in terms of amperage). How about you?

Jose
-- 
www.mcnach.com

Richt Hoat Chillis:
http://www.myspace.com/rhcpscot  - Bass: OLP MM2
http://www.freakmusic.co.uk/scotland/bands/the_richt_hoat_chillis

www.myspace.com/purplenoise68
-
Current favourite guitar: Fender 'Sambora' Stratocaster
Current favourite bass: Warwick Corvette $$

"christofire"  wrote in message 
news:...
>
> "christofire"  wrote in message 
> news:WOmdnYUnB_DaIk7XnZ2dnUVZ8sKdnZ2d@bt.com...
> >
> > I'm a bit surprised the output of a switch-mode supply can't be 
> > adequately smoothed though. What sort of noises are being experienced? 
> > ... buzzes?
>
> ... but maybe it's not so much a matter of smoothing the voltage that 
> appears between the + and - outputs of a switch-mode supply, but 
> 'common-mode' issues to do with the fact that both + and - lines are doing 
> something a bit pulse-like relative to earth.

Yes indeed - ground noise gets overlooked. However, it *is* possible to do a 
switcher/linear hybrid with good noise performance. Consider using a 
switcher supplying somewhere around 12/13V (i.e. 9V plus the 7809's dropout 
voltage) to e.g. a 7809 (or a bank of them, one for each pedal - using a 
decent heatsink for each one). The really critical thing is routing the 
(spikey) ground currents such that the switcher stuff is all done and dusted 
before the linear regulators... hard to explain without a schematic. Also 
consider using an RC filter ahead of the regulators - they're not great at 
rejecting really HF stuff. And considering the ground to be a noise path, 
and filtering that accordingly too.

Practical realisation left as an exercise for the reader ;).

Steve
PS: probably easier to use a linear supply, with multiple secondaries and 
7809s etc for each output... and separate grounds... ;)
PPS: earth is noisy too...
-- 
http://www.fivetrees.com

?