R L Measures wrote:
> Does this involve keying the amplifier with zero drive, and tuning the
> Tune-C and Load-C throughout their ranges?
Summary:
[think of a grid-driven amplifier with link-coupled input and output]
Short the grid tank coil so that there's no possibility of tgtp
oscillation at operating frequency. Replace fixed bias with grid leak
of 10-20K. Disconnect any load from output. Reduce plate/screen v so
dissipation rating isn't exceeded. Adjust grid tuning capacitor in
steps from max to min; at each step, tune plate capacitor through full
range. Any flicker of grid current or dip or flicker in plate current
indicates oscillation. If found, use absorbtion wavemeter to determine
frequency.
--
73,
Vic, K2VCO
Fresno CA
http://www.qsl.net/k2vco
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