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oldticktock · 5th Apr 2010, 1:59 pm

Ran the 5 EF80's through the valve tester, according to the AVO data gm should be 6 and my valve data book states 7.4

they all have poor gm readings of 0.2, 0.1, 0.6, 0.2 and the best was 2.6 and they show up as replace.

Two questions:

1. Do these lead a hard life?
2. Do they recover with use.

I have 12 others in stock and will test those to see if they are ok or give same poor readings

Chris

P.S.

Tested the other 12 and they all test as either indiff or good with gm's of
3.4, 3.2, 3.4, 3.6, 3.2, 3.6, 4.2, 4.6, 4.4, 2.2, 3.8

One was a Brimar 6BW7 and although a Brimar answer to a EF80 is not a direct replacement even though pin compatable.

Anyway looks like the ones out of the TV62 maybe duff, we will see.

5th Apr 2010, 1:59 pm	#119
oldticktock Retired Dormant Member Join Date: Nov 2009 Location: Weardale, UK. Posts: 1,981	Re: Tv62 Ran the 5 EF80's through the valve tester, according to the AVO data gm should be 6 and my valve data book states 7.4 they all have poor gm readings of 0.2, 0.1, 0.6, 0.2 and the best was 2.6 and they show up as replace. Two questions: 1. Do these lead a hard life? 2. Do they recover with use. I have 12 others in stock and will test those to see if they are ok or give same poor readings Chris P.S. Tested the other 12 and they all test as either indiff or good with gm's of 3.4, 3.2, 3.4, 3.6, 3.2, 3.6, 4.2, 4.6, 4.4, 2.2, 3.8 One was a Brimar 6BW7 and although a Brimar answer to a EF80 is not a direct replacement even though pin compatable. Anyway looks like the ones out of the TV62 maybe duff, we will see. Last edited by oldticktock; 5th Apr 2010 at 2:26 pm.