[Premium-Rx] Premium-Rx Digest, Vol 163, Issue 1

Mon Jun 8 17:11:17 EDT 2020

RF-590 Encoder. If the encoder for the 590 is the same as the 590A/2368
Allied Electronics has them in stock the last I checked.

Craig W9CLA

Sent from Samsung Tablet

On Mon, Jun 8, 2020, 10:02 AM <premium-rx-request at mailman.qth.net> wrote:

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> Today's Topics:
>
>    1. Racal RA-3791 (EDWARD SYLVESTER)
>    2. Cubic R3030 power supply (L D Ritta)
>    3. Re: Cubic R3030 power supply (Charles Steinmetz)
>    4. Help with Harris RF-590 (Daniel Robinson)
>    5. Re: Help with Harris RF-590 (Charles Steinmetz)
>    6. WTB Harris RF-590(A) (Todd K. Rodgers)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Tue, 26 May 2020 01:56:47 +0300
> From: EDWARD SYLVESTER <aidehua at aol.com>
> To: "premium-rx at mailman.qth.net" <premium-rx at mailman.qth.net>
> Subject: [Premium-Rx] Racal RA-3791
> Message-ID: <FE547A45-8EF0-4495-BF77-574A433E2B28 at aol.com>
> Content-Type: text/plain; charset=utf-8
>
> Premium Rx Trivia Question:  What is Option 13 in this fantastic receiver?
> Have that sticker on the rear panel and Enquiring minds want to know.?
>
> Thanks,
> Ed
>
>
> ------------------------------
>
> Message: 2
> Date: Fri, 5 Jun 2020 02:52:35 +0930
> From: "L D Ritta" <vk5abc at adam.com.au>
> To: <Premium-Rx at mailman.qth.net>
> Subject: [Premium-Rx] Cubic R3030 power supply
> Message-ID: <[email protected]>
> Content-Type: text/plain;       charset="us-ascii"
>
>
>
>  Hello All
>
> I am in the process of repairing one of my R-3030 power supplies but don't
> know much about rt1 and rt2.
> The only information the circuit gives is that they are thermistors and 25
> ohms cold I don't know what to buy.
> I have seen lots of them, can someone give me heads-up, I have never
> purchased a thermistor before.
>
> Has anyone ever seen the module extenders for the Cubic radios before.
>
> 73's  Lee de vk5abc
>
>
>
> --
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>
>
> ------------------------------
>
> Message: 3
> Date: Fri, 5 Jun 2020 01:26:46 -0400
> From: Charles Steinmetz <csteinmetz at yandex.com>
> To: premium-rx at mailman.qth.net
> Subject: Re: [Premium-Rx] Cubic R3030 power supply
> Message-ID: <5ED9D796.4040102 at yandex.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> L D Ritta wrote:
>
> > I am in the process of repairing one of my R-3030 power supplies but
> don't
> > know much about rt1 and rt2.
> > The only information the circuit gives is that they are thermistors and
> 25
> > ohms cold I don't know what to buy.
>
> Those are NTC thermistors, generally known as "inrush current limiters."
>   They are almost certainly GE/Amphenol CL-Series parts, either CL-190
> or CL-200.  The CL-190 is rated for steady-state currents of 0.5-2.4A,
> while the CL-200 is rated for steady-state currents of 0.4-1.7A.
>
> Whichever the originals were, I'd be inclined to replace them with CL-190s.
>
> <https://www.mouser.com/datasheet/2/168/920-325D-LR-245176.pdf>
>
>
> Best regards,
>
> Charles
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Fri, 5 Jun 2020 13:19:18 -0400
> From: Daniel Robinson <dxace1 at gmail.com>
> To: premium-rx at mailman.qth.net
> Subject: [Premium-Rx] Help with Harris RF-590
> Message-ID: <68a5f7eb-9016-78ad-b914-aebda301af7c at gmail.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Anyone who owns a 590 or 590A, I have a 590 that has binding on the main
> tuning knob/encoder.
> Radio tunes OK but very hard to turn the knob.
>
> Any help appreciated...
>
>
> ------------------------------
>
> Message: 5
> Date: Sat, 6 Jun 2020 15:23:29 -0400
> From: Charles Steinmetz <csteinmetz at yandex.com>
> To: premium-rx at mailman.qth.net
> Subject: Re: [Premium-Rx] Help with Harris RF-590
> Message-ID: <5EDBED31.8060009 at yandex.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Daniel wrote:
>
> > I have a 590 that has binding on the main tuning knob/encoder.
> > Radio tunes OK but very hard to turn the knob.
>
> First thing you need to determine is whether the *knob* is binding, or
> the *encoder* itself is stiff.  So, the first step is to remove the knob.
>
> If the encoder is free, then reinstall the knob so it isn't rubbing.
>
> If the encoder is stiff, you have three choices:
>
> 1)  Use it as it is
>
> 2)  Take the encoder apart, knowing you might destroy it
>
> 3)  Replace the encoder
>
> There was a discussion of replacing the encoder back in December.  In
> particular, see Heinz Breuer's message of 10 Dec 2019:
>
> <http://mailman.qth.net/pipermail/premium-rx/2019q4/009737.html>
>
> Unfortunately, Heinz indicated the status was "end of life" with a "last
> time buy" date of 31 Dec 2019.  But at least you'll know what you're
> looking for (see the datasheet specs).
>
> Hopefully, you'll find you just have a rubbing knob.
>
>
> Best regards,
>
> Charles
>
>
>
>
> ------------------------------
>
> Message: 6
> Date: Mon, 8 Jun 2020 10:55:11 -0400
> From: "Todd K. Rodgers" <tkr at pobox.com>
> To: Premium-Rx at mailman.qth.net
> Subject: [Premium-Rx] WTB Harris RF-590(A)
> Message-ID: <3d4c6ce1-f58e-e3c0-425f-4a175eea41e3 at pobox.com>
> Content-Type: text/plain; charset=utf-8; format=flowed
>
> Looking for a clean, fully functional Harris RF-590 (or RF-590A)
> receiver to fill an empty 3U slot in my rack of stuff. Any pointers to
> potential items for sale, most appreciated!
>
> best 73's
>
> Todd, KC1SQ
>
>
>
> ------------------------------
>
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>
> End of Premium-Rx Digest, Vol 163, Issue 1
> ******************************************
>