Phil,
I measured 30 to 33 ohms cathode on mine, but then it's running 3100 volts.
Larry - W7IUV
At 01:42 PM 6/17/00 -0500, Phil Clements wrote:
>I'm ready to start drilling holes on a new amp, and I wanted
>to confirm from you YC-156 users out there that I am in the
>ball park on my design numbers. Please comment on them:
>
>!. Pi-L designed @ 1000 ohms plate load.
>2. Tuned input designed @ 24 ohms cathode impedance, with
> a "Q" of 4.....Eimac says 3 or more.
>3. c. -30 volts bias should give ZSAC of 600 ma with Ep of 6000v.
>4. Siemens arc suppressor installed from grid to cathode to limit
> internal tube arcs to < 4 Joules.
>5. HV glitch resistor installed; will start testing with a 10 ohm 100 watt
> resistor.
>6. 6 minute timer installed to turn on HV and PTT after filament is powered.
> (Per Eimac)
>7. Filament power controlled through air flow sensor in blower.
>8. 10 minute timer installed to run blower after shut-down. (Per Eimac)
>
>Am I missing anything here? I like to live by the motto: measure twice,
>drill once. An Elmer of mine once said: "Measure with a micrometer, mark
>it with chalk, and cut it with an axe!"
>
>Thanks for all ideas, caveats, and suggestions!
>
>(((73)))
>Phil, K5PC
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