[TenTec] Perspective on Collins R390A

[Mark Rauchfuss]

You didn't have to follow this procedure with AF & RF gain manipulation.
All one needed to do was use the BFO and "sweep" or rotate it to the
optimum position. You didn't have to fiddle with the AF Gain or RF gain
unless you were attempting to adjust the volume or received signal
strength (gain), respectively. The Hammarlund SP-600 JX-37 is exactly
the same as is the 51J-3 (R-388), 51J-4 (civilian version of the R-390,
but with crystal band pass filters) and many other receivers of the era.

Mark,
KB8GKZ

-----Original Message-----
From: tentec-bounces at contesting.com
[mailto:tentec-bounces at contesting.com] On Behalf Of Carl Moreschi
Sent: Thursday, January 23, 2003 3:25 PM
To: tentec at contesting.com
Subject: Re: [TenTec] Perspective on Collins R390A 

One other thought.  Any of the old type receivers that has a BFO and
does
not have a product detector can copy SSB quite well.   All you do is run
the
AF gain full and use the RF gain control as a volume control.  You do
not
have AGC with this method but SSB comes out quite nicely.  I do this now
with my old Collins 75A1 (1950) and also my RCA ACR-155 (1937).

Carl Moreschi N4PY
Franklinton, NC
----- Original Message -----
From: "Mike Manship" <w9oj at peoplepc.com>
To: <tentec at contesting.com>
Sent: Thursday, January 23, 2003 10:48 PM
Subject: Re: [TenTec] Perspective on Collins R390A


> At 08:36 PM 1/23/03 -0000, Carl Moreschi wrote:
> >The R390A did very well in it's day.  It was one of the most accurate
and
> >stable receivers of its time with excellent mechanical filters.  It
played
> >real well on AM, SSB, and CW.
>
> Didn't the R390A require an external SSB adapter to become a "real"
> SSB receiver (selectable sideband and a product detector) ?
>
> 73 de Mike W9OJ
>
>
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