[ARC5] ARC5 Octal Crystals

[Mark K3MSB]

Robert

There is a 7000 Khz one also.  It was on ebay months ago.   Pretty salty
price.

Mark K3MSB

Sent from my Android phone
On Aug 16, 2014 3:37 PM, "WA5CAB--- via ARC5" <arc5 at mailman.qth.net> wrote:

> Brian,
>
> In a message dated 08/16/2014 13:55:04 PM Central Daylight Time,
> bcarling at cfl.rr.com writes:
> > Do you know what frequency those marker crystals and receiver crystals
> > ran on?
>
> The octal crystal holder used was a type DC-8-(*).  Frequencies that I have
> come across over the years are as follows:
>
> 2500 KC  *
> 3500 KC  *
> 4600 KC  *
> 5205 KC
> 5500 KC
> 6200 KC  *
> 8000 KC  *
>
> Frequencies marked "*" are listed in NAVAER 08-5Q-4 on the ATA/ARA. as
> being in the appropriate transmitter.  Except for 2500 KC, the same list
> is in
> T.O. 08-10-50.  AN 08-30ARC5-2 doesn't have a list, saying merely that the
> frequency must be specified when ordering.
>
> >
> > 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.
>
> No idea.
>
> >
> > Also - I am not familiar with the FT-230. I need to learn about that, and
> > what frequencies
> > were used for the receivers.
>
> The FT-230 is the little panel and box that plugs into the front of the
> SCR-274-N receivers.  It is the one normally shipped in all receivers.
> Besides
> the various aluminum components, it consists of one connector that mates
> with the male mini-banana pins in the front panel recess.  Connector wiring
> consists of only one jumper in the +24 VDC input line.  The receiver was
> turned ON and OFF by a switch on the remote control box located
> elsewhere.  The
> similar FT-260 has a switch across the two pins in place of the jumper.
> Neither accessory have anything to do with crystals.  I have seen
> somewhere two
> of three photographs showing a receiver with two crystals mounted in what
> was probably a modified FT-230.  But AFAIK, no documentation has ever
> surfaced
> on it.  Even if you were to come across an actual modified FT-230, plugging
> it into a receiver wouldn't convert the receiver to crystal control.  Some
> significant wiring modifications would have to be made inside the receiver
> in order for it to work.
>
> As already stated, the crystal doesn't control the transmitted frequency.
> All MF and HF transmitters are VFO equipped (or MOPA) and will work fine
> without a crystal plugged in.
>
> >
> > 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
> >
>
> Robert Downs - Houston
> wa5cab dot com (Web Store)
> MVPA 9480
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