[AMRadio] Can they 'really' know?

[Mike Sawyer]

Rob said:

Hi, I am curious--what do you do with a pair of 813 to get twice the
current AM limit?

Twice would be around 600 w. carrier (basically the old power limit of
1000W dc input).

I know of pair 813 rigs modulated by a pair but they are ~ 300 maybe
350 watt rigs.
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Rob,
    I easily get 500 watts out of a pair running at 2200VDC. I modulate them 
with a pair of 810's on the HN-500. Most of the other commercial rigs out 
there will give you about 250~300 with a pair because they run them at 
1500VDC and usually 805's are the popular mod tube. It gives them a single 
source B+ so another power supply is not needed.
    Just my 813's worth......
Mod-U-Lator,
Mike(y)
W3SLK