AVO model 72 - UK Vintage Radio Repair and Restoration Discussion Forum

gw3xjc · 3rd Sep 2017, 4:52 pm

Hi guys. I have bought an avo model 72 in real good condition. It would appear that the only fault I can see that there is something wrong with the lowest ohms range. For example when you short the probes out it reads zero, correct. However, if you put a low values resistor across it WG , 20 ohm, 75 ohm , 150 ohm it still reads zero. I have the circuit here but with the switches having difficulty in following on the screen. Any experts out there. Have had it apart and the high value , close tolerance resistors, three of them read correctly.
Regards
Rog GW3XJC

3rd Sep 2017, 4:52 pm	#1
gw3xjc Retired Dormant Member Join Date: Jun 2005 Location: Maesteg, Bridgend County Borough, Wales. Posts: 26	AVO model 72 Hi guys. I have bought an avo model 72 in real good condition. It would appear that the only fault I can see that there is something wrong with the lowest ohms range. For example when you short the probes out it reads zero, correct. However, if you put a low values resistor across it WG , 20 ohm, 75 ohm , 150 ohm it still reads zero. I have the circuit here but with the switches having difficulty in following on the screen. Any experts out there. Have had it apart and the high value , close tolerance resistors, three of them read correctly. Regards Rog GW3XJC