[Amps] TH347 filament ramping

[John Lyles]

Gerald, that's unfortunate, I hope you didn't pay list price for those 
tubes and have them fail like that.
Your relay scheme seems like it would have prevented problems. Did the 
filaments burn out or did they just short to grid and stick there?
73
John
K5PRO

> I lost a couple of good TH347 tubes due excess filament current at turn on. 
>  I thought there was sufficient turn on current limiting but apparently  
> not.
> 

----
> 73,
> Gerald K5GW