Thread: Grundig tk 24
View Single Post
Old 19th May 2021, 7:36 am   #73
DMcMahon's Avatar
Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 3,610
Default Re: Grundig tk 24

Still strongly recommend to check the output pentode Control grid voltage as per Post 64.

If C22 and C26 are electrically leaky or become leaky later then worse case scenario is that the output transformer could get damaged.

If you have an insulation tester/Megger then you could test the coupling capacitors (out of circuit) for their resistance. Test at their rated voltage or at least their circuit working voltage, you will see that new capacitors will be virtually infinite (> 100s MOhms) and old/bad capacitors will be much lower value.

DMcMahon is offline   Reply With Quote