[AMRadio] 813 question

[Brian Carling]

On 31 Jan 2006 at 14:20, Brett gazdzinski wrote:
 
> Over all the years of using tubes, I had one 75th loose its filament,
> and
> one 4d32 has a piece of metal floating around in it (but it works), and
> I have an 811 with no plate cap. The 75th was the only one that ever
> failed,

Brett - I had a few dozen of those tubes, and the first 75th 
I tried worked fine. After using several of them in the same circuit
I got to about the 12th one and noticed a slightly lower plate 
current.
By the time I got to the 75th 75th I was just confused. 
(LOL!)

Bry, AF4K