[Milsurplus] R-388B/URR receiver

[Paul Thekan]

This topic brought up a question I've had for years on a R388 rcvr I have
that has the filters installed like the 51J4. Mine has both the data plate
and "Caution before operaring" tags removed and I figured it to be a
modified R388 with the filters added later.
 Why people remove these tags is a mystery to me.
 Thanks for bringing this topic up.
Paul
N6FEG

On Sun, Apr 18, 2021, 11:54 AM Jim Whartenby via Milsurplus <
milsurplus at mailman.qth.net> wrote:

> As per Henry Rogers, WA7YBS at:
> http://www.radioblvd.com/Collins_51J_Receivers.htm
>
> *R-388A/URR and R-388B/URR* - US Navy version of 51J-4 - it is unknown if
> this model was actually produced (or tagged as such) even though it's
> listed in the Navy books. Same with the R-388B. These receivers may
> actually have the 51J-4 designation on the ID tag.
>
> I do not understand the finer details of the Navy procurement system (does
> anyone?) but I realize that the Navy had stringent requirements for
> electronics aboard ships.  Perhaps rivaling those environmental conditions
> found in aircraft or guided missiles.
>
> For instance, the URC-32 is a suitably modified KWT-6 Type 8 in a shorter,
> shock mounted, equipment rack.  The Collins part numbers may be different
> but AFAIK, there is no physical difference in the various KWT-6 type
> assemblies v the URC-32.
>
> That said, perhaps the Navy was just dotting the "i's" and crossing the
> "t's" in assigning a Federal Stock Number for the 51J-4 and the modified
> with mechanical filters 51J-3 aka R-388 receivers?  Is there a physical
> difference between an 51J-3 and an R-388?
> Regards,
> Jim
>
> Too much agreement kills a chat.  E. Cleaver
> <https://www.brainyquote.com/authors/eldridge-cleaver-quotes>
>
>
> -----Original Message-----
> From: Nick England <navy.radio at gmail.com>
> To: R. Dennis Gibbs <R390A at verizon.net>
> Cc: milsurplus at mailman.qth.net
> Sent: Sun, Apr 18, 2021 1:29 pm
> Subject: Re: [Milsurplus] R-388B/URR receiver
>
> I agree, Dennis. I’ve never seen an R-388A tag either.
> I do have a manual labeled Navy Model R-388A/URR NAVSHIPS 92324
> (0967-994-9010) which is a US Govt Printing Office reprint  of a 1960
> Collins 51J-4 manual.
>
> On Sun, Apr 18, 2021 at 1:57 PM R. Dennis Gibbs <R390A at verizon.net> wrote:
>
> Hi Nick,
>
> For what it’s worth, I have been an R-388 connoisseur for about 50 years
> now.  Although I have heard of the listing of an R-388A, I have never
> actually seen an ID tag with “R-388A” on it, but have seen R-388s with
> mechanical filters.  So I do suspect an R-388A is simply an R-388 with the
> upgrade kit installed, but they never created (to my knowledge) R-388A tags.
>
> Never heard of or saw an R-388B, though.
>
> Dennis
>
> *From:* milsurplus-bounces at mailman.qth.net [mailto:
> milsurplus-bounces at mailman.qth.net] *On Behalf Of *Nick England
> *Sent:* Sunday, April 18, 2021 1:22 PM
> *To:* Meir Ben-Dror WF2U <wf2u at ws19ops.com>
> *Cc:* milsurplus at mailman.qth.net
> *Subject:* Re: [Milsurplus] R-388B/URR receiver
>
> The 51J-4 version would be the R-388A. The "B" model has a different stock
> number but I have never found anything at all about it - just a listing in
> "Bureau of Ships Controlled Electronics Equipment (F Cognizance)", NAVSHIPS
> 92563(B).
> R-388A/URR is FSN 5820-557-5140 (formerly 5820-557-5139) - listed in 1956
> R-388B/URR is FSN 5820-897-8314 - listed in 1961
> Cheers,
> Nick England K4NYW
> www.navy-radio.com
>
>
> On Sun, Apr 18, 2021 at 12:51 PM Meir Ben-Dror WF2U <wf2u at ws19ops.com>
> wrote:
>
> Nick,
>
> I think it’s the R-388 with the upgrade kit (mechanical filters+switch) to
> the equivalent of the 51J-4.
>
> 73, Meir WF2U
> Landrum, SC
>
> *From:* milsurplus-bounces at mailman.qth.net *On Behalf Of *Nick England
> *Sent:* Sunday, April 18, 2021 12:39 PM
> *To:* milsurplus at mailman.qth.net
> *Subject:* [Milsurplus] R-388B/URR receiver
>
> Has anyone ever heard of an R-388B/URR? - It has a separate Federal Stock
> Number and 1961 price of $1240
>
> Nick England K4NYW
> www.navy-radio.com
>
> --
> Nick England K4NYW
> www.navy-radio.com
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