>
> Here's why I made that suggestion. I have a Dentron 160-10L, the
>older brother to the clipperton. It has a 2200 volt plate transformer
>and was designed for 4 811a's . The rather crude owners manual
>advises the user to replace the 811a's with 572b's for mucho power/Qrm
>!. I'm converting it for 2 572b's.
> Info on the Web(AG6K ?)
I don't think so. The 811A is rated at 1250V in plate modulated
service. In ssb service the 811A does pretty ok up to about 1900v -
provided that tuneup is done with a cw keyer sending dits or a tuning
pulser. 572Bs can stand much more anode voltage and anode dissipation
due to the graphite anode material.
>states that 811a's and 572b's are swappable.
>I think the newer manufactured 811a's handle the higher voltages just
>fine.
Some 811As use thicker anode material.
- later, Pat
Rich...
R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures
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