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

The Philpott · 1st Oct 2018, 6:54 pm

Model 4

I suspect much or all of the ferrous swarf originated from one of the main screws securing the magnet to the concentrator, which was nickel plated steel, in poor condition. Swapped for a brass screw. Accuracy is encouraging,the loss of 1,200vAC/600vAC facility..ah well, no Avo of mine with a metal case goes near mains electricity unless it's a one-off careful test. 70v DC reads accurately on the 1,200vDC range so that huge wound shunt and it's half-mile of wire is OK-for the majority of it's long life i think it has been kept away from damp.

1st Oct 2018, 6:54 pm	#1752
The Philpott Dekatron Join Date: Aug 2016 Location: Colchester, Essex, UK. Posts: 4,108	Re: AVO Multimeter survey Model 4 I suspect much or all of the ferrous swarf originated from one of the main screws securing the magnet to the concentrator, which was nickel plated steel, in poor condition. Swapped for a brass screw. Accuracy is encouraging,the loss of 1,200vAC/600vAC facility..ah well, no Avo of mine with a metal case goes near mains electricity unless it's a one-off careful test. 70v DC reads accurately on the 1,200vDC range so that huge wound shunt and it's half-mile of wire is OK-for the majority of it's long life i think it has been kept away from damp.