[Amps] SB-220 Re-Build

[Joe]

aLL SHE COULD MAKE HE HE HE i KNOW i KNOW. bUT WITH THAT ACTIVE BIAS THE 
TUBES BARELY CHANGED COLOR AT MOSE A DULL RED. SO THOUGHT i WAS SAFE.

oopS cAPLOCK

Anyway I did not know the weak link was the transformer.

Joe WB9SBD
Sig

The Original Rolling Ball Clock
Idle Tyme
Idle-Tyme.com
http://www.idle-tyme.com
On 5/13/2019 6:45 AM, Jim wrote:
> What is a useful bias?
>
> You have lowered the Q of the tank circuit by raising the plate 
> voltage 500 volts which makes it more efficient, but lowers the 
> harmonic suppression.
>
> What power output level were you running in RTTY when you blew up the 
> original transformer?
>
>
> Thanks
> 73
> Jim W7RY