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|3rd April 2010, 06:19 AM||#1|
Join Date: Jan 2007
Location: Adelaide, South Australia
Apox volume, input select & front board
I have the following APOX items for sale
1.Front panel board IR1, Fully assembled tested and 100% working order
2.Input select boards (balanced) x 2, IS1 Fully assembled tested and 100% working order
3.Volume board (balanced) Apox-1 Rev 3. Fully assembled but has issues.
I purchased all of these items just recently from a diy audio member, with the full knowledge that the volume board was not fully operational. The seller was very honest. I took the gamble.
I was sure that I could find the problem.
Anyway, this is what I have found out.
All of the analog side, ie relays, resistor network is correct. I have checked against the excel calculator on the Apox web site, and all appears in order.
Unfortunately, I believe that as the rotary encoder is being advanced, incorrect relays are being selected.
Basically, there is a huge decrease in gain between steps 75 to 76, 95 to 96 and 105 to 106.
From step 135 up to 255, it is all over the place.
I am 90% sure that the problem lies within the source code of the microprocessor, as this is responsible for relay selection.
Apox have sent me the source codes.
Unfortunately this means digital / microprocessors / compliers / assemblers etc, and all of this is well beyond my knowledge, and donít think I could do it.
Believe me; I would rather not sell it, as I wanted this unit for a project very badly. I just have to be realistic with my abilities.
If anyone can help me, so I donít have to sell it, thatís great, if not sale is inevitable.
All I am asking is what I paid for it, which is $160 AUD for the entire set.
Last edited by GeeVee; 3rd April 2010 at 06:25 AM.
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