[Milsurplus] Harvey Wells AR-5A Military Aircraft

Jim Isbell millenniumfalcon at cableone.net
Fri Oct 22 10:06:01 EDT 2004


I would think that they must have been able to transmit on that 
frequency because this is an aircraft receiver made to be installed in 
an airplane and it has a position on the selector switch that is labeled 
TOWER, indicating that the operator might expect to hear the tower in 
that position.  The other positions on that switch are Range, Filter, 
and B'cast

D C Macdonald wrote:

> It is likely that control towers did not  TRANSMIT  on LF/VLF,
> but it is also likely that a receiver used in the tower might
> easily be used to periodically monitor a nearby LF station
> that transmitted weather information for a wide area, or
> simply to check to see if the local non-directional beacon
> or Adcock range were still transmitting.
>
> LF stations broadcasting wide-area weather reports used
> to exist; there was one here in Oklahoma City and they
> provided weather info to aircrew, both for flight planning
> and for in-flight updates.
>
> I don't know if these are still in operation.
>
> Mac, K2GKK/5
>
>
>
>
> ----Original Message Follows----
> From: WA5CAB at cs.com
> To: millenniumfalcon at cableone.net
> CC: milsurplus at mailman.qth.net
> Subject: Re: [Milsurplus] Harvey Wells AR-5A Military Aircraft
> Date: Thu, 21 Oct 2004 21:56:40 EDT
>
> I don't have any info on the receiver (that I know of) but the answer 
> to your
> other question is no, airfield control towers never used VLF, which is
> anything below 30 KC.  They could (and did) transmit voice at MF 
> (300-3,000 KC) and
> in the upper portion of the LF band (30-300 KC) through their ND 
> beacons.  And
> received and transmitted at HF (3,000-30,000 KC).  I've forgotten the 
> exact
> reason for this although I can think of several plausible ones.
>
> In a message dated 10/21/2004 7:43:55 PM Central Daylight Time,
> millenniumfalcon at cableone.net writes:
> > I recently got a Harvey Wells AR-5A military aircraft radio.  It has 
> two
> > bands, 200 to 400 Kcps and 550 to 1650 Kcps both AM detection.
> >
> > There is a switch on the front with a position for Tower and one for
> > Range and others.  I know that the Range was in the VLF frequency band,
> > but did the tower in the late 40s and early 50s use VLF??
> >
> > This set is extremely clean and is complete with an attached AC power
> > supply.  I have not yet tried it out but am thinking of using it for 
> the
> > final IF of an AM converter (yet to be built) for 80-40-20-10 where the
> > output of the converter will be 200 Kcps chunks of the various ham 
> bands.
> >
>
> Robert Downs - Houston
> <http://www.wa5cab.com> (Web Store)
> <wa5cab at cs.com> (Primary email)
> <wa5cab at houston.rr.com> (Backup email)
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