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Title: Unusual BECKMAN 51J-4!! Post by: WBear2GCR on March 12, 2019, 06:47:30 PM This is a very unusual 51J-4! Apparently made for or re-badged by Beckman, it sports a light grey front panel! The listing says it was restored by Miltronix... so it's super clean to look at, would have liked to have seen a "before" picture too. It is up on epay, but I thought it was of general interest to all. (link is for reference only) https://www.ebay.com/itm/Collins-51J-4-Serviced-and-Excellent-Condition-One-of-a-Kind-by-Beckman-LABS/254154810874?hash=item3b2ccea5fa:g:AM8AAOSwzkRcgX1D (https://www.ebay.com/itm/Collins-51J-4-Serviced-and-Excellent-Condition-One-of-a-Kind-by-Beckman-LABS/254154810874?hash=item3b2ccea5fa:g:AM8AAOSwzkRcgX1D) Picture submitted for your approval! :D Title: Re: Unusual BECKMAN 51J-4!! Post by: w8khk on March 12, 2019, 06:58:31 PM The 51J4 I have was acquired via AF MARS, and it has the same Beckman logo. I am not sure how rare that one is. I assume Beckman was licensed by Collins manufacturing under contract to provide the receiver to the military.
Title: Re: Unusual BECKMAN 51J-4!! Post by: WBear2GCR on March 12, 2019, 07:22:59 PM I'm no expert or collector, but I've not seen a pic of that before, iirc! Is yours grey too? Got pix? Title: Re: Unusual BECKMAN 51J-4!! Post by: w8khk on March 12, 2019, 07:53:30 PM Not very good photos, and the mic is probably hiding what you want to see.
this was taken during the rally in feb. I will try to remember to post a close-up soon. Yes, the panel is gray, original paint. Title: Re: Unusual BECKMAN 51J-4!! Post by: WBear2GCR on March 12, 2019, 08:20:26 PM Wow... who knew? So the next question is there any sign of Collins inside? The PTO label? The cans? Etc... Title: Re: Unusual BECKMAN 51J-4!! Post by: w8khk on March 12, 2019, 08:29:09 PM I will look and get back to you with more photos....
Title: Re: Unusual BECKMAN 51J-4!! Post by: K4NYW on March 12, 2019, 08:55:57 PM Made as usual by Collins. I don't believe any one else made 51J-3 or 51J-4.
Beckman merely placed an order with Collins for some with a custom front panel. You may also see light gray front panel 51J-4 which were Collins test/lab units. How about a blue 51J-3? http://www.navy-radio.com/rcvrs/r388/r645-gpq3-13.jpg R-645/GPQ-3 - Collins made for a Raytheon USAF contract. R-388, 51J-3, 51J-4 production info http://www.navy-radio.com/rcvrs/r388.htm cheers, Nick K4NYW Title: Re: Unusual BECKMAN 51J-4!! Post by: Fred k2dx on March 20, 2019, 01:34:07 PM My 51-J4 is gray too. The story came with it also that the gray faced J4s were made for Collins labs use in house. SN 7676, on the Collins tag. AMfone - Dedicated to Amplitude Modulation on the Amateur Radio Bands
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