[R-390] Re: [Collins] Collins 51J-4 Connectors

Sat, 9 Feb 2002 08:47:16 -0500

Hello, Kurt.

The diode load and AGC outputs are not really unusual. Many, but not all,
J4's have them. I recall an e-mail thread of long ago that attempted to
establish their appearance in the J4 production history to a serial number.
I think there was some evidence that units with a serial number higher than
about 1700, or so, came with the two extra back panel jacks, but I cannot
remember with certainty. The SO-239 jack was also standard on (most ...
maybe all?) J4's, certainly all I have seen. My serial number 1801 has the
diode load and AGC jacks, too. The J4 is a fine receiver and is among my
favorites.

The third jack on the back of your receiver IS interesting, though. If it is
an F-type, does that connector even date to the age of the 51J4? Hmmm...

Dan
WB4GRA

----- Original Message -----
From: "Kurt Brandstetter" <[email protected]>
To: "Collins R-390 Reflector" <[email protected]>
Cc: "Collins" <[email protected]>
Sent: Friday, February 08, 2002 9:42 PM
Subject: [Collins] Collins 51J-4 Connectors

> Hello from Vienna !
>
> My Collins 51J-4 (Ser. No. 2954) has 3 connectors on the rear panel that I
> cannot find on a picture in the manual I have.
>
> The green is named "Diode Load" , the white "AGC" . Whats the use for the
> diode load and especially I would like to know if these are original (they
> look original and also the printing on the backside for these 2
connectors.
> They are situated on the right side of the rear panel left and right of
the
> ZF Out.
>
> On the left side of the rear panel there is a (for me) unknown connector.
It
> is an old 75 Ohm connector which I saw in use for some video equipment
years
> ago at a TV station. I don't know what this connictor is used for.
>
> Can someone of you give me some help and look for the pictures at:
> http://members.chello.at/kurt.brandstetter/File/PIC1.jpg and
> http://members.chello.at/kurt.brandstetter/File/PIC2.jpg and help me to
> identify these connectors and give me some information if they are
original
>
> There is also a page with pictures from my 51J-4 under the link "Collins
> 51J-4" under receivers in the left frame of my homepage (after entering
the
> first page) at: http://www.swl.net/oe1002419 .
>
> You can also reach the 51J-4 page directly via:
> http://www.swl.net/oe1002419/Page2b51/51.htm
>
> Thanks in advance for your help !
> Kurt
> --
> 73 de Kurt OE 1002419          ICQ-UIN 43074273
> CCA member AC01-01249 NCDXF #4175  INDEXA #1720
> Homepage: http://www.swl.net/oe1002419
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