UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - Avo 7 meter

The Philpott · 13th Aug 2019, 2:59 pm

Prime candidates:-

-If the ACV ranges work- sounds like a switching problem with the leaf switches.
-If the ACV ranges DON'T work- the Voltage shunts are arranged in series so if the lowest value winding (or component resistor) is open circuit this renders all the voltage ranges dead. (Possibly the lowest ACV range might still work though- can't remember..)

What year of manufacture is it?

Circuit diagram easy to find- it's probably been represented on this forum if you look in the search facility.

Dave

13th Aug 2019, 2:59 pm	#3
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,108	Re: Avo 7 meter - no voltage reading Prime candidates:- -If the ACV ranges work- sounds like a switching problem with the leaf switches. -If the ACV ranges DON'T work- the Voltage shunts are arranged in series so if the lowest value winding (or component resistor) is open circuit this renders all the voltage ranges dead. (Possibly the lowest ACV range might still work though- can't remember..) What year of manufacture is it? Circuit diagram easy to find- it's probably been represented on this forum if you look in the search facility. Dave