Ok
Rewired as above
Adjusted meters and they do work...... but
After turning the amp off and on again they only way I can get them going again is to quickly wake them up by turning the volume up to almost 100% for a brief moment ? Progress I guess.
Richard
Search found 9 matches
- Fri Sep 24, 2021 7:33 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
- Fri Sep 24, 2021 5:44 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
Sorry, I have the 12V wired to the VU globe and not the meters, sketch was wrong.
So based on your sketch I just need to swap the black and green around ? I thought I had already tried that but I will give it a go and report back.
Final wiring as attached.
So based on your sketch I just need to swap the black and green around ? I thought I had already tried that but I will give it a go and report back.
Final wiring as attached.
- Thu Sep 23, 2021 12:32 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
The saga continues :) Fired up the amplifier this morning and there is no response from either VU meter. I must be wiring something incorrectly. I have attached my wiring diagram. Its as though the meters need to be "charged" or "awakened" some how. Any suggestions on the wiring appreciated. Amp.png
- Wed Sep 22, 2021 10:37 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
Hi Joe Omg, I have spent 3 days trying to sort this out. One buffer board has fried an opamp, 2 1uf caps and a diode. I decided to desolder the lot and rebuild it and it seemed to fix the issue.... it seemed. Then the same meter stopped working all of a sudden. It turned out to be the solder connect...
- Sun Sep 19, 2021 12:44 am
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
I think the issue is I am sharing the power supply from the amplifier to power the buffer but don’t fully understand the wiring needed. I use a dc-dc buck converter to reduce the +35v amplifier rail to 12v which powers the buffer. I connect the amplifier input audio rca V+ to the V+ Of the buffer bo...
- Sat Sep 18, 2021 6:45 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
Hi Joe
I have wired the meters at the amplifier inputs but I am having difficulty registering movement on the meters when playing real music ? No problem calibrating the meters with my signal generator and a sine wave though?
Cheers
I have wired the meters at the amplifier inputs but I am having difficulty registering movement on the meters when playing real music ? No problem calibrating the meters with my signal generator and a sine wave though?
Cheers
- Mon Sep 06, 2021 10:24 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
Thanks Joe
One last question, what does the yellow wire input connect to ? The red/black is obviously the signal input. Seems to work fine without connecting the yellow to anything ?
Richard
One last question, what does the yellow wire input connect to ? The red/black is obviously the signal input. Seems to work fine without connecting the yellow to anything ?
Richard
- Sat Aug 28, 2021 7:18 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
Thanks Joe
Can I ask what people use the peak circuit for ? A simple LED on the from panel of the amp seems a bit simple/static. What else can be done or have yu seen done with the peak circuit ? Not that I want more holes to make on the front timber facia of the amp
Can I ask what people use the peak circuit for ? A simple LED on the from panel of the amp seems a bit simple/static. What else can be done or have yu seen done with the peak circuit ? Not that I want more holes to make on the front timber facia of the amp
- Sat Aug 28, 2021 2:05 pm
- Forum: JLM Audio Kits
- Topic: VU BUFFER & PEAK LED KIT BUILD THREAD
- Replies: 144
- Views: 436365
Re: VU BUFFER & PEAK LED KIT BUILD THREAD
OK, got both boards soldered up and connected to ST-475's. Just wanted to confirm the setup procedure. I am wiring these into a 30W Jean Hiraga Build, using a buck converter to get 12V from the 35V amplifier rail. I have tested the amplifier and an input signal level of +-1.8v sine wave will generat...