[Amps] testing a big amp

[donroden at hiwaay.net]

One Hundred and Ten Amps ??

Not very efficient @ 180KW load.

Two point eight megawatts in / 180 KW out

Don W4DNR




Quoting John Lyles <jtml at losalamos.com>:

> A TH628 double-ended tetrode ("Diacrode") has been purring along all  
> day heating a water load with 26 kV plate voltage, and 110 amps of  
> plate current. At 200 MHz, it's been
> quite a leap, average power today was 180 kW in the load, 2 MW peak  
> in pulses. A little RF leakage was causing havoc before, now fixed.  
> On Monday, it'll stretch out with around
> 250 kW average, based on the good test results today, Friday, the  
> 13th. I'm posting this AFTER testing - worried about even trying  
> today. Me, superstitious?
> I remember being nervous about dipping the plate too slowly on a  
> 3-500Z at full voltage in my SB220 years ago. This monster makes me  
> jumpy when someone closes a book or drags a chair
> around the test bench... Is been an experience not to forget, for this ham.
> 73
> John
> K5PRO
>
>
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