[Milsurplus] Harvey Wells AR-5A Military Aircraft (History/Info)

[D C Macdonald]

Yes, Jim, I remember meeting you at
this year's Oklahoma City Ham Holiday.

GRT-21/22 and GRR-23/24 will be replaced
EVENTUALLY, but I doubt that it will happen
anytime very soon.  Money isnot available!!
In any event, I imagine the current radios
will be around for at least another 6 to 10
years before they are all replaced.  It took
over ten years before the current radios totally
replaced all the old tube-type equipment!
They are very good receivers/transmitters
and still pretty darned reliable and mostly
maintainable.  Of course, the techs here
at the depot are mostly retired military
and when we retire, the availability of
techs capable of repairs at the component
level will pretty much go away.

GRR-23 is VHF (for 121.5) and GRR-24
is UHF (for 243.0).

I don't have access to crystals, but
here is specs for the crystals for the
emergency frequencies:

GRR-23

fo:  121.5 MHz
fx:  71.05 Mhz

fx = (fo + 20.6) / 2


GRR-24

fo = 243.0
fx = 65.9

fx = (fo + 20.6) / 4 [formula for 225.0 - 312.0 MHz)

You could probably get crystals from International
Crystal in Oklahoma City.

Cheers  ---  Mac, K2GKK/5


fx = (fo - 20.6) / 4 [formula for 312.025 - 399.975)



----Original Message Follows----
From: antqradio at juno.com
To: k2gkk at hotmail.com
CC: milsurplus at mailman.qth.net
Subject: Re: [Milsurplus] Harvey Wells AR-5A Military Aircraft 
(History/Info)
Date: Mon, 25 Oct 2004 08:44:17 -0500

Mac
Good to hear from you!  At the last Mena Hamfest, I was talking to a
fellow who said he worked for the FAA.  He mentioned that the GRR-23/24
and the GRT-21/22 sets were going to be replaced in the near future.
True?

At the OKC Hamfest a couple of years ago, I picked up two NIB GRR-23s or
24s, (I also forget which).  I thought it would be fun to monitor 121.5
and 343.  Have any spare crystals?
Regards,
Jim

On Mon, 25 Oct 2004 13:25:24 +0000 "D C Macdonald" <k2gkk at hotmail.com>
writes:
 > However, I am still working on GRT-21/22
 > and GRR-23/24 radios here at FAA's depot
 > in Oklahoma City!!!
 >
 > Mac, K2GKK/5