[Premium-Rx] Cubic R-3036 dual MF/HF receiver info wanted

[Peter Gottlieb]

These receivers seem pretty rare.  In all the gear I've gone through I've never 
encountered a Cubic receiver.

Peter


On 4/21/2019 9:38 PM, w3jn--- via Premium-Rx wrote:
>   The last R-3030 I had had a several bad ICs in both the front panel interface module, which caused a whole bunch of strange issues, in addition to a bad IC in one of the IF modules.
>
> Have you tried swapping the modules side to side?
>   
>   
> -----Original Message-----
> From: frledda <frledda at att.net>
> To: 'Nick England' <navy.radio at gmail.com>; premium-rx <premium-rx at mailman.qth.net>
> Sent: Sun, Apr 21, 2019 9:29 pm
> Subject: Re: [Premium-Rx] Cubic R-3036 dual MF/HF receiver info wanted
>
> Nick,
>
> I think is part of a DF system that normal operation utilized the an
> external sync source.  The blinking LEDs are just complaining about the lack
> of ext. sync!
>
> I have one here that I purchased from Murphy's long time ago.  By the way,
> mine has some unusual mechanical filters designed for DF applications.
>
> Best, Francesco K5URG
>
> -----Original Message-----
> From: premium-rx-bounces at mailman.qth.net
> <premium-rx-bounces at mailman.qth.net> On Behalf Of Nick England
> Sent: Sunday, April 21, 2019 7:20 PM
> To: premium-rx at mailman.qth.net
> Subject: [Premium-Rx] Cubic R-3036 dual MF/HF receiver info wanted
>
> At a recent hamfest, I picked up a Cubic R-3036 MF/HF dual receiver as a
> $100 gamble. The seller knew nothing about it since it came from an estate.
> No manual of course. Some photos are at
> http://www.virhistory.com/ham/clt-19.htm#k4nyw
>
> It looks much like the R-3035, but with an IEEE-488 CPU module and a
> "Baseband Converter" module instead of the Serial Interface module shown in
> the R-3035 brochure. There are B/B outputs on the rear.
>
> I gave it the 60 cycle smoke test and got tantalum smoke out of one
> receiver. I hate old tantalum caps! OK - pull that p/s and leave that side
> for later.
>
> The other receiver powered up and the controls seem to function as expected,
> All the module fault LEDs are off. However, the displayed frequency was
> alternating with a display of "REF".
>
> OK, there are REF connectors on the rear, but no internal/external switch
> like on the 3030. The Reference/2nd LO module has what looks like a 10 Mhz
> TCXO inside so I am puzzled as to why it would require an external reference
> - So I hooked up a 10 Mhz signal generator to the REF connector and the
> "REF" display quit blinking but the fault LEDs lit up on the synthesizer
> modules. Changing the REF input to 1 MHz killed the fault LEDs as well as
> the blinking "REF".
>
> So here I am - I have no audio other than some little birdies plus a big
> birdie at 0.000 frequency. Where do I go from here? - A manual would be
> great. I found the 3035 brochure on Terry's site, but beyond that I am stuck
> trying to apply the similarities to the 3030. Any advice/pointers would be
> greatly appreciated. Are there any R-3035 owners out there?
> Cheers,
> Nick England K4NYW
> www.navy-radio.com.
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