[Amps] Sweep tube amp by DL9AH, made by HB9AWI

[Bill, W6WRT]

ORIGINAL MESSAGE:

On Wed, 01 Jul 2009 13:47:44 +0200, Angel Vilaseca <avilaseca at bluewin.ch> wrote:

>
>Yes, to obtain tha beautiful cherry red glow of the plates :-) a better 
>option would be to increase the plate voltage. With only 600 V from 
>plate to cathode, the cathode current gets too high and the poor little 
>cathode is soon exhausted :-).

REPLY:

Sweep tubes are not intended to run with any color on the plates. If you need
more output, bet a bigger tube.

I did TV repair for nearly 20 years back in the tube era. A glowing plate is a
sure sign of incipient failure, trust me on that.

73, Bill W6WRT