Search found 6 matches

by syn
Tue Feb 16, 2016 10:48 pm
Forum: JLM Audio Kits
Topic: Hybrid to drive 10R spring reverb tank?
Replies: 0
Views: 7495

Hybrid to drive 10R spring reverb tank?

Hi
can hybrid opamp drive 10R (~1R DCR) reverb tank (1.27mH)?
Recovery circuit worked out, just I'm not sure about the reverb driver.

Thank you
by syn
Fri Oct 24, 2014 12:23 am
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 255
Views: 324472

Re: JLM 60Watt Power AMP Kit

Hi Joe Thank you very much. Photos would not do much good, as most of the parts I used are SMD on adapters soldered from both sides of the PCB. Anyhow, the problem solved, the whole trick was that DC offset appeared on the pin 3 only and nowhere else , not even on the FB resistor connected to the pi...
by syn
Thu Oct 23, 2014 1:05 am
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 255
Views: 324472

Re: JLM 60Watt Power AMP Kit

Hi I just finished building my second Power AMP (the first one is working for a couple of years now, all well), and I have a problem with huge DC offset (-25VDC) on one channel. The other channel is working fine. There are no shorts, no wrong parts, no wrong orientation (checked several times, compa...
by syn
Mon Apr 05, 2010 6:23 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 255
Views: 324472

Re: JLM 60Watt Power AMP Kit

Joe thank you. So you add 20000uF pear a rail on your PCB? On my sketch I showed one channel only, but I plan to use it to power my monitors (a pair of KRK7000B), but I was thinking two "mono" blocks. If I change to one "stereo" amp, is taking the speaker 0 from the star ground still the best soluti...
by syn
Sat Apr 03, 2010 10:23 pm
Forum: JLM Audio Kits
Topic: JLM 60Watt Power AMP Kit
Replies: 255
Views: 324472

Re: JLM 60Watt Power AMP Kit

HI
I'm about to build this amp. I want to add some more filtering caps. Is this a proper way to do it and also is star grounding as drawn OK? I'm keeping the caps that are on the amp PCB, too. Sorry for the rough sketch.
Thank you very much.
by syn
Thu Mar 29, 2007 5:47 am
Forum: JLM Audio Kits
Topic: VCA
Replies: 4
Views: 16377

This is great. When will this board be available and at what cost?

cheerz