[Milsurplus] RE: GB> ART-13

[wf2u at ws19ops.com]

It's not that the 813 can't take a higher voltage, but the ART-13 was  
designed to run on around 1100 V on the 813. This is the way the  
resonant circuit was designed to match the 813 impedance at this plate  
voltage/current. Some of the components may be rated at a higher  
voltage, but why mess with a good design and long tube/component life  
for a few more watts?
The modulation transformer is a design marvel, as it is physically  
small for its rating. I heard some people running it with double the  
audio power it was designed for, but again - what for?
I'll never use my ART-13's with anything but the voltages it was designed for.

73, Meir WF2U


Quoting Hue Miller <kargo_cult at msn.com>:

>
>
> What B+ are people using on the 813 ? I think the original
> dyno supply was 1100v, which is a bit on the low side for
> an 813, but possibly the modulation transformer will not
> stand a higher power level ?  -Hue Miller