mik

PM 1000 PSU
« on: November 29, 2006, 08:00:54 AM »
hi folks, I'm working on a pm100 psu clone, for my 2 channel,
can't find the 1S1715 diodes,
any replacement ?

thank you

M.[/img]


Milkmansound

PM 1000 PSU
« Reply #1 on: November 29, 2006, 11:35:16 AM »
if you are just racking 2 channels, you can use any 44V PSU - does not have to be anything like the original.

I recently racked a pair using the JLM PSU - I only used the 48V section and it works fine, and was pretty inexpensive.

Svart

PM 1000 PSU
« Reply #2 on: November 29, 2006, 11:37:22 AM »
use just about any diode that has the same specs or better.
Welcome to the GroupDIY leper colony! when something falls off, we just replace it with a tube!
occupation: General Electron Mayhem

Alesis X2 information repository:
http://www.theopiumdenproductions.

mik

PM 1000 PSU
« Reply #3 on: November 29, 2006, 12:51:00 PM »
May I use the 1N4148 ??

M.

donnysparks

jlm
« Reply #4 on: November 29, 2006, 09:21:36 PM »
Quote from: "Milkmansound"
if you are just racking 2 channels, you can use any 44V PSU - does not have to be anything like the original.

I recently racked a pair using the JLM PSU - I only used the 48V section and it works fine, and was pretty inexpensive.


milkman,  what did you use for a power tx with the jlm?
--donnysparks

Milkmansound

PM 1000 PSU
« Reply #5 on: November 29, 2006, 10:04:59 PM »
Amveco 22V-0-22V, 35VA

from Digikey part no. TE62075-ND


Actually, using the JLM supply took a little work. I had to disable the 2 other rails and figure out which of the diodes were gonna lead me to the voltage tripler. Then, I was getting this horrible noise when turning the EQ pots to their max settings - I got rid of that by doing a regular star ground instead of the onboard audio ground scheme on the JLM PCB (just a cap and resistor I think) So if you use the JLM method, prepare to make a few jumpers and just do a regular star ground to the chassis - the preamps are nice and quiet - even more so that way I guess.

PM 1000 PSU
« Reply #6 on: November 30, 2006, 12:07:49 AM »
I've been using 1N4003 diodes ($0.04 ea or less...  about 6 or 7 in series to drop 48 to 44) and the Power-One (0.5A) PSU from Mouser.  I did build one with a Meanwell PS-25-48 (about $20 online) and even though it's a switching supply, I did not notice anything funny in the end result.

Mike

Milkmansound

PM 1000 PSU
« Reply #7 on: November 30, 2006, 11:37:16 AM »
all of the pm1000's I have racked in the past have  just run off of a single 44V - thats enough for phantom. Or you can run them off 48V which will be ok for the pm1000's. This was all confirmed ages ago in a post by PRR... so I feel fine doing it that way and have  not had any problems whatsoever.

donnysparks

re: Tx
« Reply #8 on: December 04, 2006, 02:01:09 PM »
cool!   :sam:
--donnysparks

 

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