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Old 27th Jan 2020, 11:54 pm   #96
DMcMahon
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Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
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Default Re: Grundig TK 819 Any Useful Info

Just for my own interest, tonight I did a DC voltage pass through test of all the removed/replaced paper capacitors, 16 in total (mainly Frako and a few Wilma).

Previously had measured their capacitance and nearly all were close to double their stated values, a couple were well over double. None of them measured low resistance on a DC resistance check (no resistance measurable actually).

Did a fairy low voltage test at 135 volts (tapped off a Grundig TK 5 I am in early stages of looking at) off load test.

All the capacitors passed DC voltage, best couple around 15 volts, most passed 80-120 volts and 2 I think passed the whole voltage, quite surprised how bad they were, now of course consigned to the dustbin.

Same test on new capacitors give as good as zero volts pass through.
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