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MU524 Vari-Mu Tube Compressor / Re: MU 524 build problems

« on: October 13, 2023, 04:47:21 AM »

first off i dont know what a shunt is and why am i bypassing it? shouldnt it work? also the tube heater test just went from 33.3dcv to 6.3 dcv and now 0 dcv right before my eyes with the meter on it.  I have resoldered everything including checking and going through your checklist you put on here multiple times.  one time i was able to get over 7 vac at the output and then now i cant get any without anything even changing.  very dissapointed with this company and this product. 

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MU524 Vari-Mu Tube Compressor / MU 524 build problems

« on: October 09, 2023, 06:41:33 PM »

So I have had nothing but problems with this build.  

right now on the tube heater slow start test. i am getting 2.5 dcv with the tube in and 33.5 dcv with the volts removed. i took the tube that was sent in to a local electronics place that has a tester for that tube and it didnt check out so i know its bad.  I was able to find a replacement and its being sent but my questions are is that normal to get those readings i got? or is something else wrong?  

audio paths check i have hooked up to pin 2,4 on the xt500 and set a 1.0 khz sine wave but when engaging the compressor that promptly drops to 0.  i increase the output and can get 2.0 volts ac but i am also wondering if that is normal or if that is because the tube is bad?  all the power voltage checks have passed with the values as in the guide.  i havent been able to move past those tests yet.  

thanks for the help