D*A*M - Red Rooster

beedotman · Post by **beedotman** » 02 Apr 2012, 19:29

OK... fixed layouts!
Sorry for mistake guys...

sinner · Post by **sinner** » 02 Apr 2012, 19:38

I still think LED wiring for NPN version is not right

beedotman · Post by **beedotman** » 02 Apr 2012, 19:58

Why?

In NPN D*A*M stomps switch is wired in the same way....

sinner · Post by **sinner** » 02 Apr 2012, 21:30

Looks like LED takes 9V, it's not limited by the resistor.

phibes · Post by **phibes** » 03 Apr 2012, 04:27

sinner wrote:Looks like LED takes 9V, it's not limited by the resistor.

It's right. The limiting resistor can be on either side. Doesn't matter if it's on 9v or ground.

G5120fx · Post by **G5120fx** » 03 Apr 2012, 05:15

Works perfect now!
Thx b!

beedotman · Post by **beedotman** » 03 Apr 2012, 05:18

phibes wrote:
sinner wrote:Looks like LED takes 9V, it's not limited by the resistor.
It's right. The limiting resistor can be on either side. Doesn't matter if it's on 9v or ground.

So it's correct! Thanks!

beedotman · Post by **beedotman** » 03 Apr 2012, 05:20

G5120fx wrote:Works perfect now!
Thx b!

Very cool!

Try also lower input 2u2 cap to let say 100nF and increase 10nF to 100nF on output.

FrankKair · Post by **FrankKair** » 04 Jun 2012, 14:38

The output level is a LINEAR pot? In this layout is a LOG pot... Am I missing something?

http://4.bp.blogspot.com/-9YoCXJc9x00/T ... rected.png

beedotman · Post by **beedotman** » 04 Jun 2012, 14:44

FrankKair wrote:The output level is a LINEAR pot? In this layout is a LOG pot... Am I missing something?

http://4.bp.blogspot.com/-9YoCXJc9x00/T ... rected.png

I think both are linears, but I'm not 100% sure. Lin or Log - it isn't really big difference...

JVanDe7 · Post by **JVanDe7** » 05 Jun 2012, 11:58

I built mine with 10K LOG and 100K Linear and it sweeps very nice on both.
Although... the 10K LOG boost knob is only usable after 12 o'clock. I don't mind that at all though. It hits unity level around 12 or 1 o 'clock if I recall correctly. But there are probably other factors involved besides audio or linear taper pot.

clusterstudios · Post by **clusterstudios** » 11 Dec 2012, 16:48

Hi Guys,

Going to take a stab at this booster. Does anyone know where I can get some decent transistors for it. Many tanks

Joseph

beedotman · Post by **beedotman** » 13 Dec 2012, 19:41

clusterstudios wrote:Hi Guys,

Going to take a stab at this booster. Does anyone know where I can get some decent transistors for it. Many tanks

Joseph

Try CV7355 - usually pretty high gain, but low leakage at the same time, sounds really great in boosters (they were used in Red Roosters as well) and are cheap.
You can buy 10 pieces for 15GBP, here for example (great transistor seller by the way):
https://www.ebay.com/itm/2N1309-CV7355- ... 3cc8efb182

beedotman · Post by **beedotman** » 13 Dec 2012, 19:48

These sounds great - CV7003 (military version of OC44) - Analogman is using them in Beano Boost.
Same seller, but 7GBP for a piece...:
https://www.ebay.com/itm/OC44-CV7003-TI ... 483a255923

beedotman · Post by **beedotman** » 13 Dec 2012, 19:51

If You're located in US You can choose something from SBE:

Dr Tony Balls · Post by **Dr Tony Balls** » 13 Dec 2012, 20:15

I make em with soviet MP38As all the time

gilmour_pugliese · Post by **gilmour_pugliese** » 05 Feb 2013, 23:49

hi guys, it's possible to replace the range pot with a 250k lin, without any difference in tone?

beedotman · Post by **beedotman** » 06 Feb 2013, 09:52

gilmour_pugliese wrote:hi guys, it's possible to replace the range pot with a 250k lin, without any difference in tone?

Resistance could be to big, you can try, maybe it will suit You.
You can also put 220K resistor across pot lugs that You will be using to achieve around 100K pot resistance.

beedotman · Post by **beedotman** » 06 Feb 2013, 09:54

Resistor on pot should be around lug 3 and 2 since on 2 and 1 it had jumper.

gilmour_pugliese · Post by **gilmour_pugliese** » 06 Feb 2013, 09:59

beedotman wrote:Resistor on pot should be around lug 3 and 2 since on 2 and 1 it had jumper.

Thanks man!