AVO VCM MKI valve Tester - UK Vintage Radio Repair and Restoration Discussion Forum

oobovril · 27th Nov 2018, 1:48 am

Hi Chaps,

Have any of you successfully carried out the modification on the meter of a MKI AVO VCM. This mod is covered in the Radio Bygones article on this VCM in the 2011 Christmas edition. Here they state to get the correct time constant you will need to fit a 325uf capacitor with the appropriate diodes which I assume to be the IN5711's. To this end have any of you actually done this mod or did you do something slightly different.

Nick

27th Nov 2018, 1:48 am	#1
oobovril Triode Join Date: Oct 2016 Location: Ruislip, Middlesex, UK. Posts: 15	AVO VCM MKI valve Tester Hi Chaps, Have any of you successfully carried out the modification on the meter of a MKI AVO VCM. This mod is covered in the Radio Bygones article on this VCM in the 2011 Christmas edition. Here they state to get the correct time constant you will need to fit a 325uf capacitor with the appropriate diodes which I assume to be the IN5711's. To this end have any of you actually done this mod or did you do something slightly different. Nick