Search found 6 matches

by bassivus
Thu Aug 19, 2010 7:27 pm
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

There is definitely a mistake then in your veroboard circuit layout. As this is just a wide gain range amp with output rectifier and should have no time constant or threshold component to it except for power on settling which is almost instant with the 10uF cap values. Maybe a VU buffer PCB would s...
by bassivus
Thu Aug 19, 2010 4:59 am
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

Still not working properly... this tells my story: http://www.youtube.com/watch?v=eKmfK9CEvKw Video doesn't really tell me anything except that meter is way to fast and will need a 100uF cap across its meter terminals to make it more like a VU 300mS Attack and release. If you reverse the meter wire...
by bassivus
Thu Aug 19, 2010 4:51 am
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

Bassivus, this may be an obvious suggestion, and pardon me if it is - but did you try adjusting the trim pot to a lower setting. It seems like you're maxing out your meter with an already hot, line-level signal, and then boosting it the buffer circuit. Or maybe the other way round - I just watched ...
by bassivus
Thu Jul 08, 2010 1:12 am
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

Still not working properly... this tells my story: http://www.youtube.com/watch?v=eKmfK9CEvKw
by bassivus
Mon Jul 05, 2010 8:32 am
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

Thanks for the answer Joe!!! I'll try that when I find some time.
by bassivus
Fri Jul 02, 2010 2:12 am
Forum: JLM Audio Kits
Topic: VU BUFFER KIT BUILD THREAD
Replies: 66
Views: 165877

Re: VU BUFFER KIT BUILD THREAD

Hi, first I would like to thank you for the nice VU buffer schematics. I saw it searching for something that I could use on home preamp with some old Grundig VU meters from tape machine. I have test build it on the piece of proto board. It works, but since I don't use it on balanced signal I can not...