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

OldTechFan96 · 14th Jun 2019, 3:01 pm

I've been looking at the intensity preset pots as suggested by Wavey Dipole and have adjusted them so that I get -1002V with the intensity control f. anticlockwise and -901V with the control f. clockwise. These voltages were measured on the middle pin of the intensity control. I've attached a photograph of the current positions of the pots. The brightness is overall still quite low.

H/K resistance (at CRT socket): 6.5MΩ

H/K resistance (at CRT pins): O/L

I'll get some 10MΩ resistors ordered and make myself a HV probe.

14th Jun 2019, 3:01 pm	#112
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,186	Re: Hameg HM307-3 Cleaning and Repair I've been looking at the intensity preset pots as suggested by Wavey Dipole and have adjusted them so that I get -1002V with the intensity control f. anticlockwise and -901V with the control f. clockwise. These voltages were measured on the middle pin of the intensity control. I've attached a photograph of the current positions of the pots. The brightness is overall still quite low. H/K resistance (at CRT socket): 6.5MΩ H/K resistance (at CRT pins): O/L I'll get some 10MΩ resistors ordered and make myself a HV probe. Attached Thumbnails