[TMC] SBT-1KV lives!
Duncan M. Brown
duncanancy at earthlink.net
Wed Feb 4 16:43:10 EST 2009
OK Gary, I'll try that. This was my first experience with a BIG
transmitter. And this was first pass to see if rig would put out any
power. I know that there are some adjustments on the MV power supply that
need to be checked.
Have fun,
Duncan, K2OEQ
> [Original Message]
> From: Gary Schafer <garyschafer at comcast.net>
> To: <duncanancy at earthlink.net>; Roy Morgan <k1lky at earthlink.net>
> Cc: <tmc at mailman.qth.net>
> Date: 04-Feb-09 14:07:34
> Subject: RE: [TMC] SBT-1KV lives!
>
> When tuning any tetrode (or pentode) you should watch the screen current
> meter rather than the plate current. The screen current is much more
> sensitive than the plate. Tune the plate tuning for maximum output and at
> the same time the screen current will peak. Increasing loading will bring
> the screen current down. Then repeak it again with the plate tuning.
>
> If you are running too much screen current you have either too light
loading
> or too much drive. That is if your screen voltage is set properly.
>
> 73
> Gary K4FMX
>
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