UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Hameg HM307-3 Cleaning and Repair

WaveyDipole · 12th Jun 2019, 6:43 pm

Ok, so with the new OC installed, T353 collector voltage is now switching between about -870v and -900v? Then that is good. Since it was previously stuck at around -870v it is curious that this has had no effect on brightness though. You are sure that the connection to pin 3 of the CRT is good? It seems unlikely that R51 would have gone o/c but might be worth disconnecting pin 3 of the CRT and just checking it though.

12th Jun 2019, 6:43 pm	#101
WaveyDipole Nonode Join Date: Mar 2013 Location: Leicester, UK Posts: 2,535	Re: Hameg HM307-3 Cleaning and Repair Ok, so with the new OC installed, T353 collector voltage is now switching between about -870v and -900v? Then that is good. Since it was previously stuck at around -870v it is curious that this has had no effect on brightness though. You are sure that the connection to pin 3 of the CRT is good? It seems unlikely that R51 would have gone o/c but might be worth disconnecting pin 3 of the CRT and just checking it though.