Moreplay Complete: No sound on right channel [resolved]

PB,  I had the volume on my iPad all the way up, but the tone generator app has its only volume control.
I turned that to max too.  Now I get 3.66 VAC on 9 and 4.07 VAC on 19.  I hope that makes sense.

 
With preamp powered on and preamp volume pot half way up the top center lug measures 0.536 VAC and the bottom lug measures 0 VAC (?).
 
Can you use your meter to measure the resistance between the center lug on each level of the volume pot and the lug behind it (where the white and red wires land)?
 
PB,

Top measures 9.15 Kohms (top center lug to lug with white wire) and bottom measures 9.36 Kohms (bottom center lug to lug with red wire).
 
There's something kind of impossible about all of the data you've posted.  My best guess is that you have a loose connection somewhere around the wiring going to the volume pot that is causing the issues you're having.  Ultimately you cannot have those four resistance values and not have any voltage coming out of half of the pot without some kind of connection issue at work.
 
Ok Paul, this is helpful.  Let me see what I can find.  I'll report back.

Thanks for guiding me and wading through all the measurements.

John
 
Yes, double check those center lug AC signal voltages to verify the bottom lug is zero.
 
Doc and PB:  It's fixed and it sounds great!  Listening to Brian Auger's Oblivion Express album Straight Ahead.  Wow!  See picture.

I re-flowed the solder on the volume pot connections.  Also, you know that balance pot lug that is tricky due to having 3 heavy black wires in that tiny pot lug?  I re-made that connection which was kind of wonky.  When I measured the voltage on the right channel lug of the volume pot......there it was: a signal!

This would have taken me forever without your help Paul.  I apologize if it was torture.

This is significant because I built this one for my friend Tony.  Now I get to build one for me.

Thanks again,

John
 

Attachments

  • Moreplay Fixed!.jpg
    Moreplay Fixed!.jpg
    162.8 KB · Views: 20
Back
Top