[Hammarlund] Collins or Hammarlund?

[Roy Morgan]

At 02:36 PM 3/10/2004 -0500, Craig Roberts wrote:
>By the way, if anyone has any hints about increasing the stability and
>readout accuracy of the HQ-series receivers, please submit them.

Craig et.al.

Proceed as follows:

1) Procure a Northern Radio Corporation Model 105 Master oscillator. (The 
TMC VMO-5 will do just as well or better, but is harder to find.  Similar 
external oscillators were made for diversity setups with the Hammarlund, 
Collins and TMC radios, though I can't quote model numbers.)

2) Modify your radio to accept the signals (Local Oscillator VFO, and BFO 
if needed)

3) Cable it all up, figure out the frequencies needed for operation, let 
the master Oscillator settle down for a few days, and enjoy rock stable 
operation.

Oh, you want readout accuracy?  Get one of those after market external 
frequency readouts.. cost maybe $350. (The NRC master oscillator is set to 
frequency by reference to calibration curves and possibly a frequency 
counter.  The TMC VMO is direct reading on the fundamental but you still 
have to calculate LO frequency needed and multiply up if on the higher 
bands.)

What a cobble job that would be!

Roy


- Roy Morgan, K1LKY since 1959 - Keep 'em Glowing!
7130 Panorama Drive, Derwood MD 20855
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