|[AMRadio] need help|
Edward B Richards
zuu6k at juno.com
Wed Oct 19 12:54:14 EDT 2005
Thanks, Ed. I actually have not built it yet. Still in the design stage.
It will be a Heathkit KL-1 clone. 3kv on the plates.
73, Ed K6UUZ
On Wed, 19 Oct 2005 15:45:50 +0000 <esieb at sympatico.ca> writes:
> I'd have used an MFJ 259B to actually measure the input Z.
> you can always use a small tuner to "tune" the input. I do that
> with my Drake L4B, (use a small MFJ mobile tuner with meter).
> 4-400's, eh? Nice amp! If your plate voltage is high enough, you
> ought to
> get serious power out of that baby!
> 73, Ed, VA3ES
> From: Edward B Richards <zuu6k at juno.com>:
> I want to drive a linear amplifier with a rice box that requires a
> 50 ohm
> The linear amp uses an input to a 170 ohm, 80 watt swamping resistor
> ground, then
> through a .001 mfd capacitor, then through a VHF parasitic
> consisting of 4 turns of wire around a 47 ohm resistor, to the
> grids of
> a pair of parallel connected 4-400A tubes.
> What I need to know is the impedance of the input. Is it close to 50
> or do I need to use a matching network between the rice box and the
> linear amplifier.
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