Bottlehead Forum
Bottlehead Kits => Legacy Kit Products => Quickie => Topic started by: bmwr75 on December 08, 2012, 08:34:35 AM
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Assembled and installed the PJCCS upgrade on my Quickie today.
The voltages don't check out right.
IA/IB measures fine at 37 VDC
A6/B6 measurs 15 VDC, outside the 19-21 VDC range expected
A5/B5 measure 280 mV, outside the ~2 VDC expected
Hum when amp/speakers and source connected is unacceptable. Am guessing the hum is caused by pin 5 grid voltage being way too low.
Thoughts on what might be wrong?
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Oh.....and the preamp worked fine before the PJCCS was installed.
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Never mind. I forgot to turn off the fluorescent light fixture on my work bench.......it causes the Quickie to hum. I knew this already, but forgot when I got flustered about the A5/B5 pin voltage not measuring correctly.
FYI - if you wire up your Quickie per all the manual corrections, I think the A5/B5 voltage should be measured at A1 or A7 and B1 or B7. My Quickie measures ~2 VDC at these pins.
I love Bottlehead kits, but the errors in the manuals can drive a person crazy!!
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Sounds like the D cells are backwards - see the manual correction (first sticky in this forum).
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Sounds like the D cells are backwards - see the manual correction (first sticky in this forum).
I called myself wiring up the Quickie (without the PJCCS) correctly per the manual correction. All the voltages checked out fine before I wired in the PJCCS, at least I think they did. ;)
It sounds fine know. I'll try turning the D cells around and see if it sounds any different.