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

OldTechFan96 · 8th Jun 2019, 6:13 pm

There is 100V across C350.

I've subbed in a BC327 in place of the BF440 and the junction voltages remain -875V. Perhaps this is correct?

D351 had the same voltage on each side. It tested good out of circuit. There doesn't seem to be any voltage across it.

Would I be able to use my good scope to try and probe the blanking and unblanking pulses?

8th Jun 2019, 6:13 pm	#84
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,178	Re: Hameg HM307-3 Cleaning and Repair There is 100V across C350. I've subbed in a BC327 in place of the BF440 and the junction voltages remain -875V. Perhaps this is correct? D351 had the same voltage on each side. It tested good out of circuit. There doesn't seem to be any voltage across it. Would I be able to use my good scope to try and probe the blanking and unblanking pulses?