[ARC5] 75 Mtr to "Q-5er" Converter.

[Mike Everette]

I stand corrected; my memory was faulty re the model numbers.  This was definitely a converter; probably a Super 6 now that I think about it.

73

Mike
W4DSE

--- On Wed, 12/26/12, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:

From: D C _Mac_ Macdonald <k2gkk at hotmail.com>
Subject: RE: [ARC5] 75 Mtr to "Q-5er" Converter.
To: radiocompass at yahoo.com, "boatanchors at mailman.qth.net" <boatanchors at mailman.qth.net>, "boatanchors at theporch" <boatanchors at theporch.com>, "ARC-5 Mail List" <arc5 at mailman.qth.net>, "arc5 at ix.netcom.com" <arc5 at ix.netcom.com>
Date: Wednesday, December 26, 2012, 11:30 AM





The Gonset G-66 and G-66B were complete receivers, NOT

converters. They covered standard broadcast and 160 meter 

through 10 meter standard amateur bands.  Selectivity was 

specified as 4 kHz (kcs) at 6 dB down, quite adequate for 

mobile AM usage.  Double conversion using 2050 kc and 

265 kc IFs. 

  

Above info taken from original Gonset owner manual. 

 

I guess the second IF could be taken off to a Q5er for 

better CW selectivity, but I found it adequate for AM 

mobile use.  I used mine to take 6th place in 1962 ARRL 

Field Day in Class C (mobile). 

 

I used a Morrow 5BR-1 80-10 converter into a 1.5-3.0 MHz

"command" receiver for a home station receiver between 

1955 and 1958 or so. 

 
* * * * * * * * * * * 
* 73 - Mac, K2GKK/5 * 
* (Since 30 Nov 53) * 
* k2gkk at hotmail.com * 
* Oklahoma City, OK * 
* USAF & FAA (Ret.) * 
* * * * * * * * * * * 
 
 
> Date: Wed, 26 Dec 2012 08:00:36 -0800
> From: radiocompass at yahoo.com
> To: boatanchors at mailman.qth.net; boatanchors at theporch.com; milsurplus at mailman.qth.net; arc5 at mailman.qth.net; arc5 at ix.netcom.com
> Subject: Re: [ARC5] 75 Mtr to "Q-5er" Converter.
> 
> One of my friends used a Gonset G-66 (?) mobile converter from the 50s in front of a Q5er. It worked very well indeed.
> 
> 73
> 
> Mike
> W4DSE
> 
> --- On Wed, 12/26/12, David Stinson <arc5 at ix.netcom.com> wrote:
> 
> > From: David Stinson <arc5 at ix.netcom.com>
> > Subject: [ARC5] 75 Mtr to "Q-5er" Converter.
> > To: boatanchors at mailman.qth.net, boatanchors at theporch.com, milsurplus at mailman.qth.net, "ARC-5 List" <arc5 at mailman.qth.net>
> > Date: Wednesday, December 26, 2012, 10:10 AM
> > I've been asked a couple of times
> > about this simple converter which can be used to receive 75
> > meters (or any other band)
> > on your little 200-400 KC aircraft "Range" sets:
> > 
> > http://home.netcom.com/~arc5/converter.JPG
> > 
> > The operative word is "simple," and I find the trade-offs
> > for keeping it so acceptable.  Not even slightly
> > interested in building something for the bridge of the
> > Starship Enterprise
> > because it might be 13.725% "better" ;-)
> > 
> > I used a color-burst crystal (3580 KC as in the diagram)
> > because they are cheap and plentiful.
> > 3880 KC will appear at 300 KC on the dial.
> > However- there will be images from the 3.2 MC SWBC
> > stations lower in the band.    I don't worry about
> > this
> > because I'm only going to use the rig from 3870-3890
> > anyway.
> > You can add a "wave trap," which is just copies of 
> > L1's secondary and C1 in series with the antenna lead, which
> > you tune to reject the SWBC.
> > 
> > If you have a crystal in the 4180 KC range, the image freqs
> > will be in 4480 KC area, which should be quieter.
> > 
> > Open the power lead to the converter during transmit
> > and your TR switching for these little rigs is done,
> > unless you're running a KW.  Might want to protect the
> > input to the chip if you do that.
> > 
> > Remember that most of these "Range" receivers have very
> > sharp IFs, which can restrict recovery
> > of speech sidebands ( meaning "sound crummy" ;-)
> > Often, one can "stagger-tune" the IFs- tune the first a
> > little low, the middle right on, the last a little high-
> > trading some gain for more bandwidth.
> > There are other ways.  If using a BC-453, just push
> > all the little "sticks" on the top of the IF cans all the
> > way in.
> > 
> > Back to work for me,
> > 73 Dave AB5S
> > 
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