Search found 8 matches

by janczmok
Tue Sep 06, 2011 10:21 am
Forum: JLM Audio Kits
Topic: TREX and TREX2 Transistor regulator kit
Replies: 27
Views: 51645

Re: TREX and TREX2 Transistor regulator kit

Actually, i finished the M1 outputs and i got Hum on my Firewire (e.g. M1 Mixbus output from the WBS), but that's just solely related to the WBS, which i will address. It's more or less symmetric vs. non-symmetric. from the PSU side, this is by far the best solution :-) Thanks again for any help. I'...
by janczmok
Tue Sep 06, 2011 4:10 am
Forum: JLM Audio Kits
Topic: TREX and TREX2 Transistor regulator kit
Replies: 27
Views: 51645

Re: TREX and TREX2 Transistor regulator kit

Thanks for the info. I've implemented it and now got a fully blown two channel racking :-) It's working perfectly, thanks for the good tip + advice. NO noise or hum at all.
by janczmok
Fri Aug 26, 2011 10:42 am
Forum: JLM Audio Kits
Topic: TREX and TREX2 Transistor regulator kit
Replies: 27
Views: 51645

Re: TREX and TREX2 Transistor regulator kit

Short one: If i need a +25V and -25V can i modify the TREX to get this values (probably with another TIPxxx transistor). I need those +/-25V for WBS rack ...

Thanks for any hints/infos.
by janczmok
Thu Aug 25, 2011 8:49 am
Forum: JLM Audio Kits
Topic: Beta Testers for new unreleased JLM kits
Replies: 10
Views: 33468

Re: Beta Testers for new unreleased JLM kits

If you're looking for another "Euro"-Beta Tester i am here :-)
Have done lots of 19" rackings, about 10 51X modules and around 150 modular synth modules.
medium skill for debugging, have scope, meters etc.
by janczmok
Sun Jul 24, 2011 2:57 am
Forum: JLM Audio Kits
Topic: AC/DC & POWERSTATION KIT BUILD THREAD
Replies: 322
Views: 325642

Re: AC/DC & POWERSTATION KIT BUILD THREAD

Thanks for pointing that out. Will (again) fix the wiring. Last question: HUM elimination. I am having a substantial portion of humming on the channels when i touch the chassis. I tried different points of grounding, but which way is the correct one? I assume Chassis should go to Chassis GND, same a...
by janczmok
Fri Jul 22, 2011 1:30 am
Forum: JLM Audio Kits
Topic: AC/DC & POWERSTATION KIT BUILD THREAD
Replies: 322
Views: 325642

Re: AC/DC & POWERSTATION KIT BUILD THREAD

Hi Joe,

AC/DC Kit now working fine. What was the issue ? One: One of the AC feeds was reversed (probably minor, but still) and fixed. And you were right on the 317/337 combo. Wonder why i haven't seen that before :oops:

48V, +/- 18V now provided steady :-) thanks for the excellent help.
by janczmok
Thu Jul 21, 2011 1:43 am
Forum: JLM Audio Kits
Topic: AC/DC & POWERSTATION KIT BUILD THREAD
Replies: 322
Views: 325642

Re: AC/DC & POWERSTATION KIT BUILD THREAD

See attachments. Will answer questions in separate post:
IMG_8453.jpg
IMG_8454.jpg
The transformer datasheet URL: http://www.farnell.com/datasheets/85993.pdf
by janczmok
Wed Jul 20, 2011 9:17 pm
Forum: JLM Audio Kits
Topic: AC/DC & POWERSTATION KIT BUILD THREAD
Replies: 322
Views: 325642

Re: AC/DC & POWERSTATION KIT BUILD THREAD

i am stuck with a problem, which you might be able to sort out with me: Feed: - Primary Feed is 220V - Secondary Feed 2 x 25V Toriod (Farnell MC-146-030-125) - wired as chassis gnd, orange, yellow, black, red My aim: - 48V for Phantom Mic - V+/V- 18V for 2 DDA Channel Rackings My problem: - 48V coul...