[R-1051] activity

[paul swed]

Sorry to say that I did not go back into the site to fix my login. There
has been so little communications I sort of dropped the list.
My r1051 and tranciever versions have been running some 25 years. No
electrical problems. But I did need to grease the turret.
Good luck
Paul

On Tue, Mar 7, 2017 at 6:02 PM, W2HX <w2hx at w2hx.com> wrote:

> I think the successor to the 1051 was the Harris RF-590 (and the R-2368
> version of fit). But I could be wrong
>
> -----Original Message-----
> From: R-1051 [mailto:r-1051-bounces at mailman.qth.net] On Behalf Of Guido
> Santacana
> Sent: Tuesday, March 07, 2017 5:35 PM
> To: R-1051 Discussion Group
> Subject: Re: [R-1051] activity
>
> Well, the R1051 was a hybrid of the 60s and apparently even used in the
> first nuclear submarine Nautilus. My son visited the venerable sub and sent
> me an image of the radio room showing the R1051. Mine has been in the shack
> for 15 years requiring only a minor bridge rectifier repair of the 28VDC
> supply. It gets a weekly exercise and works well except for the 28VDC
> lamps. Did General Dynamics ever came up with a follow up of this set?
>
> Best 73s
>
> Guido
>
> G. Santacana KP4FAR
>
> On Tue, Mar 7, 2017 at 1:00 PM, Ray Fantini <RAFANTINI at salisbury.edu>
> wrote:
>
> > Being that no one else is writing anything thought I would take the
> > opportunity to use up some bandwidth and talk about the wonder of
> > General Dynamics and the whole family of radios that includes the
> > R-1051, RT-618,
> > T- 827(URT-23) and there evil ground base cousins the AN/GRC-106 I put
> > all these radios in the same class being they all are hybrids,  all of
> > them use a couple tubes in the rotating turret and rely on the turret
> > technology to provide the necessary image rejection and unwanted
> > spurious products that first generation synthesized sets produced. As
> > far as I know that’s the majority of 1 MHz rotary turrets sets that I
> > know of. I have seen similar ideas in ITT Mackey and Sunair but they
> > are a bit newer being all solid state and rely on tons of miniature
> > reed relays to select the 1MHz band pass filters and don’t use the
> > turret. The older and more costly turret wins out in my mind and for
> > that reason those radios are somewhat special to me. Just as a side
> > note let me point out the Harris URC-94 or RF-280 that’s something
> > like all the Sunair and other stuff but instead of a bunch of bandpass
> > filters and relays they have a signal section with a manual tuned
> > bandpass filter that takes the place of the turret or the filter board
> > with all its relays. Great stuff, think the Big heavy Harris is one my
> > favorite sets just because the way they got around this spurious and
> > image problem but wonder how many Navy personal were befuddled by the
> process of having to push “TUNE” and peak for maximum reading?
> > The sixties, seventies and eighties were truly a peak of engineering
> > design and implementation of new and sometimes unique concepts, not
> > like that old WW2 crap that was used in the command sets that other
> > reflectors keep going on about.
> > But enough about all that, is there a point to my email? Well maybe not.
> > Let me say something about the 5 MHz reference oscillator assembly for
> > the
> > GRC-106 that for some unknown reason I have been seeing them fail a lot.
> > For those of you following along at home that’s the 1A3 Frequency
> > Reference Module. The crystal oscillator is a simple two transistor
> > circuit but no matter what I do it is beyond my capability to repair
> > one of those little bastards. Tried changing capacitors, transistors
> > and everything else but find that if I can’t get them to oscillate
> > they just won’t osculate no matter what I do. Gone so far as to gut
> > the oscillator section and build a replacement oscillator or use an
> sealed 5 MHz time base to replace them.
> > The worst thing of all is that I got a 1A3 assembly that was NOS,
> > never opened and it had the same failure where the oscillator would
> > occasionally not start. That’s the problem is they won’t always start
> > but then if you touch the tuning capacitor or just do a reading with a
> > meter the dam things start up and run again or you will do some
> > changes and testing the assembly outside the radio it will work but
> > when you get it all back together and after seeing it work on the
> > bench a week or so later when you go to use the radio it won’t
> > oscillate! The weird this is I have seen this on a couple
> > RT-662 and RT-834 exciters-receivers but as far as I know have never
> > had an issue with the Navy time base in the R-1051.
> > Well that’s enough of my rant for now, let’s see if any of you other
> > people can write.
> >
> > Ray F/KA3EKH
> >
> >
> > ______________________________________________________________
> > R-1051 mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/r-1051
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:R-1051 at mailman.qth.net
> >
> > This list hosted by: http://www.qsl.net Please help support this email
> > list: http://www.qsl.net/donate.html
> ______________________________________________________________
> R-1051 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-1051
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-1051 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> ______________________________________________________________
> R-1051 mailing list
> Home: http://mailman.qth.net/mailman/listinfo/r-1051
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:R-1051 at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>