UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post

DMcMahon · 15th Sep 2020, 5:01 pm

I am still using an external PSU connected directly to the battery compartment connector (as from Post 24/26) which has a clean output, the last time I checked (need to double check it).

I do need to try it back on the Z131 to see if same 50 Hz symptom exists.

If it is a real 50Hz signal (seems to be) then hard to understand where it is coming from, more tests should help, possibly could be a capacitor related issue.

I wish I had some noise on headphones minimum volume to attenuate, it is dead

David

15th Sep 2020, 5:01 pm	#99
DMcMahon Dekatron Join Date: Apr 2019 Location: Worthing, West Sussex, UK. Posts: 6,603	Re: Uher CR 240 AV Cassette Recorder I am still using an external PSU connected directly to the battery compartment connector (as from Post 24/26) which has a clean output, the last time I checked (need to double check it). I do need to try it back on the Z131 to see if same 50 Hz symptom exists. If it is a real 50Hz signal (seems to be) then hard to understand where it is coming from, more tests should help, possibly could be a capacitor related issue. I wish I had some noise on headphones minimum volume to attenuate, it is dead David