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

OldTechFan96 · 14th Jun 2019, 9:09 pm

With AT off the cathode voltage varies between -867V and -900V when the hor. ext. button is pressed in/out.

CRT voltages (AT off, hor. ext. in, no sig, intensity minimum):

1: -907V
2: -1005V
3: -904V
4: -615V
5: N/A
6: +95V
7: +88V
8: +100V
9: +109V
10: +109V
11: N/A
12: -899V

The X/Y amp voltage will be unbalanced due to factors mentioned earlier in the thread.

14th Jun 2019, 9:09 pm	#114
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,181	Re: Hameg HM307-3 Cleaning and Repair With AT off the cathode voltage varies between -867V and -900V when the hor. ext. button is pressed in/out. CRT voltages (AT off, hor. ext. in, no sig, intensity minimum): 1: -907V 2: -1005V 3: -904V 4: -615V 5: N/A 6: +95V 7: +88V 8: +100V 9: +109V 10: +109V 11: N/A 12: -899V The X/Y amp voltage will be unbalanced due to factors mentioned earlier in the thread.