[ARC5] ARC5 Octal Crystals

[jmfranke at cox.net]

There was a good article in CQ magazine concerning the crystal controlled ARC-5 receivers: White, Gordon Elliot. "Crystal Controlled Command Sets", CQ October 1965: 43-44.

John  WA4WDL

---- jmfranke at cox.net wrote: 
> For the transmitters, check out: http://aafradio.org/flightdeck/arc5-2.htm 
> Note the warning about differences between ARC-5 and 274 "Standards." For example, I have a number of 3500 kHz crystals.
> I have no idea about the receiver frequencies.
> 
> John  WA4WDL
> 
> ---- bcarling at cfl.rr.com wrote: 
> > Thanks John,
> > 
> > Do you know what frequency those marker crystals and receiver crystals ran on?
> > 
> > Also - does anyone know what radios used hc6u crystals on 200 kHz please?
> > I have several of them I stocked here back when people were asking for them a lot, 
> > but I never figured out what radios they were using them in.
> > 
> > Also - I am not familiar with the FT-230. I need to learn about that, and what frequencies 
> > were used for the receivers.
> > 
> > Thanks again and 73 - Brian AF4K
> > 
> > On 16 Aug 2014 at 9:21, jmfranke at cox.net wrote:
> > 
> > > The octal crystals in the transmitters were not used to directly control the transmitter frequency. They were marker crystals and in conjunction with the 1629 magic eye tubes would indicate when the transmitter VFO was tuned to a specific frequency. 
> > > A number of the receiver were crystal controlled but did not use octal based crystals. Two crytsals could be pluged in to wherre the FT-230 was installed on the front panel.
> > > 
> > > John  WA4WDL
> > > 
> > > ---- bcarling at cfl.rr.com wrote: 
> > > > Question: Does anyone have any ARC5 Octal Crystals that they would like reloaded with 
> > > > amateur band crystals inside?
> > > > 
> > > > Are the ARC5 HF transmitter series basically "straight through" on most models?
> > > > Or do they use doubling etc. to arrive at the transmitted frequency?
> > > > 
> > > > If I am not mistaken, some of the radios use VFO control and some use crystals. 
> > > > If I have this all wrong please correct me. I am assuming it is the transmitters that use 
> > > > crystals for fixed frequency operation, and not the receivers, right?
> > > > 
> > > > 73 to all - Brian Carling, AF4K
> > > > 
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