So Close...Yet So Far [resolved]

anthonynchandler · 5709

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Offline Doc B.

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Reply #45 on: February 19, 2025, 07:19:02 AM
That upper center terminal on the pot is really crusty with flux and needs to be reheated.

Dan "Doc B." Schmalle
President For Life
Bottlehead Corp.


Offline anthonynchandler

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Reply #46 on: February 19, 2025, 07:57:56 AM
I will redo the volume pot now, specifically the one you suggested.

Resistence measurements before resolder with black on terminal 23, volume at mid and power on Moreplay [but they measure the same resitence with power off)

Left Top (white wire)   9.76
Middle Top                   0.945
Right Top                      0.2

Left Bottom                  9.95
Middle Bottom             0.881
Right Bottom                0.2



Offline Paul Birkeland

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Reply #47 on: February 19, 2025, 09:03:17 AM
Now with the pot turned most of the way up, play your 60Hz tone into the amp and check for signal on the middle lug of the volume pot on each level.

Paul "PB" Birkeland

Bottlehead Grunt & The Repro Man


Offline anthonynchandler

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Reply #48 on: February 19, 2025, 09:57:47 AM
Paul,

Not sure what to use to measure signal, but if it is resistance then on middle lug it is

Top 0.915
Bottom 0.853

If it is AC voltage, then it is
Top.  149V
Bottom 307.8V

I retouched solder on all of the lugs on the volume before this measurement

« Last Edit: February 19, 2025, 10:09:04 AM by anthonynchandler »



Offline dth31

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Reply #49 on: February 19, 2025, 10:22:31 AM
I never knew how easy it was to make your own signal generator. Can’t tell you how many times I wished I had one. Now I feel embarrassed for not knowing how simple and easy it is. Thank you for the simple, clear description of how to do so!

Dave



Offline anthonynchandler

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Reply #50 on: February 19, 2025, 11:05:33 AM
EUREKA!

WE HAVE SOUND!  I believe that it must have been the "crusty" solder on the volume pot which Paul spotted.  I would like to give thanks to Paul for all of the support with learning to follow the signal and taking time to get back to me when things did not make sense due to my lack of technical expertise.

I think that it will take some time to run the circuit and figure out how make it sound best within my system. The Moreplay does not sound like I would expect, so my ears will also need to adjust and figure out volumes and balance for my room. Regardless, I will write something and post it in a week or so.

Thanks again. It was not an easy process when it seemed easier than my Crack build, but then seemed to stall just before the finish line.

Be well.
Anthony Chandler