[Boatanchors] Link coupling?

[Vic K2VCO]

StephenTetorka at cs.com wrote:

> I am attempting to obtain a 50 ohm match RF output on 3.885 Mc. from a 204A 
> triode tube Hartley oscillator operating from 1000 VDC @ 100 ma to 1800 VDC @ 
> 250 ma. whose plate-to-plate Load Resistance is 8800 ohms.
> 
> Presently have a tank coil with 11 turns made from 1/4 inch copper tubing 
> that is 5 inches long.
> 
> The RF output link is a single turn 3 inch diameter.
> 
> Having a problem getting an SWR reading into a 50 ohm dummy...

I would try a link of at least 3 turns on this frequency.  You can get 
an adjustable loading control by putting a capacitor in series with the 
link.  It should be capable of resonating with the link at the operating 
frequency.
-- 
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco