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Old 23rd Oct 2020, 11:58 pm   #66
DMcMahon
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Join Date: Apr 2019
Location: Worthing, West Sussex, UK.
Posts: 6,587
Default Re: Brenell Purchases

Repeated all the main DC and AC voltage measurements using two DVM's and two Model 8 Mk. 3 Avo's.

The two DVMs gave as good as identical results.

One of the Avo's gave almost the same results, in fact on the higher voltages the AVO read a few volts higher.

The other AVO gave somewhat lower results, a few results are:-

+HT - DVM 333V, Avo 320V
EL 84 Screen Grid - DVM 291V, Avo 280V
EL 84 Cathode - DVM 9.63V, Avo 9.5V
EZ 80 anode to anode - DVM 616V, Avo 580V

Have no idea of the calibration accuracy of the 2 Avo's, obviously the one that read a little higher than the DVMs is suspect. Where possible changing the Avo voltage range to a higher or lower range generally gave the same results for the same voltage.
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