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

OldTechFan96 · 3rd Jun 2019, 10:33 am

Thanks for the simulation Wavey Dipole. I'll look into that program.

I've checked the EM513 rectifier diodes out of circuit and they all test OK.

Voltage across D301/D302: -625V

Voltage across D304/D305: -621V

I've also made a few PSU measurements which are included with the attached picture.

Buggies, funnily enough, that horrible trace only appeared once! I have not seen it since. All of the large smoothing electrolytics were tested with my Hunts tester and they were found not to be leaky.

3rd Jun 2019, 10:33 am	#55
OldTechFan96 Octode Join Date: Jul 2017 Location: Newcastle Upon Tyne, Tyne & Wear, UK. Posts: 1,178	Re: Hameg HM307-3 Cleaning and Repair Thanks for the simulation Wavey Dipole. I'll look into that program. I've checked the EM513 rectifier diodes out of circuit and they all test OK. Voltage across D301/D302: -625V Voltage across D304/D305: -621V I've also made a few PSU measurements which are included with the attached picture. Buggies, funnily enough, that horrible trace only appeared once! I have not seen it since. All of the large smoothing electrolytics were tested with my Hunts tester and they were found not to be leaky. Attached Thumbnails