[MRCA] MRC-55/GRC-14 Radio Set-Up

[WF2U]

Doug,

The transmitter is not synthesized. The Master Oscillator is phase locked, but the circuit has to be tuned to achieve lock, hence the digital dials. You preset the frequency, then tune the master oscillator until it locks. There is a free-running option for the MO to operate the transmitter, in case the frequency lock circuit has a problem and doesn't lock. The MO is pretty stable without being locked, it has a little warm-up drift but not very significant. My experience with mine...

73, Meir WF2U
Landrum, SC

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On Jun 24, 2017, 11:02 AM, at 11:02 AM, Doug Hensley <w5jv at hotmail.com> wrote:
>Thanks Jeep & Scott for the input.  I was told it had both a
>synthesizer as well as a Master Oscillator and that if the synthesizer
>failed, the Master Oscillator took over.  That's fascinating.  I don't
>know anything about the fragility of components or the like but I
>suspect all equipment is subject to the ills of developing or new
>products/components.  Think about all the early seleniums that were
>first thought to be a God-Send for self recovery.  Hard to fault the
>unit now for having a transistor 😊.... I'm also assuming it was in the
>200 Watt range?
>
>
>Does anyone know who made these?  Amazing how hard it is to find much
>on them.  Perhaps because Google is not getting calls for information,
>it has no search finds to re-issue.
>
>
>Anyway, thanks.
>
>
>Doug W5JV
>
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