[Amps] Why does power output increase?

[Victor Rosenthal 4X6GP]

On 06/06/2022 20:24, jim.thom jim.thom at telus.net wrote:

> ##  How hot does the plate xfmr get, when running 1400 watts out on CW ??

Not very hot. I have a bias control circuit that cuts the tubes off 
completely when the key is up.

<snip>

> ##  do you have  50 hz, or  60 hz power ?  If it's only 50 hz, the fan in
> the TL-922 will run quite a bit slower, with much less RPM..and cooling.

When I got the TL922 (in the US where it's 60 Hz) I thought the fan was 
very, very quiet. And it didn't seem to do too much. I replaced it with 
a somewhat louder one that moves a lot of air. I use phones so it 
doesn't bother me. Here we have 50 Hz power, so I'm glad I did that.

<snip>

> ##  I think your power shooting up 200 watts is a tube issue. (one or both
> tubes).

I think it's either tubes or the input network.

> ## You could leave the resistor in the primary of the fil xfmr.... as long
> as you shunt it out on TX.

I took it out. The voltage is under the high limit in standby. I am 
going to set up a filtering arrangement so I can measure it under full load.

73,
Victor, 4X6GP
Rehovot, Israel
CWops #5
Formerly K2VCO
https://www.qsl.net/k2vco/