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Old 18th Oct 2020, 8:57 pm   #1
MeanDumpsterCat
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Join Date: Oct 2014
Location: Selsey, West Sussex, UK.
Posts: 204
Default Ferrograph Quiet Crackly Audio

Hello. I've recently been working on a Ferrograph Series 5.

I've sorted out most of the major problems it had however when I was replacing some of the resistors and capacitors in the amplifier (since they had gone quiet out of spec) a new problem has come up.

The audio had gone extremely quiet and there's a noticeable crackling noise even with the gain at 0. Also no hum that I can usually hear with valve equipment.

The meter also no longer moves down to zero when in record mode and it does not erase the tape (it did before).

I tried giving the valves a wiggle when it was on to see if it was a loose socket connection but no such luck.

Any pointers on places I should start looking?

Cheers.
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