[R-390] 390() vs 390(A) vs 389

[Cecil Acuff]

Glen,

        I have put together the technical requirements for the R-389 upgrade 
to the R-390A after much evaluation of the design of both radio's.

1)    The R-389 is shipped to my shop for the work.
2)    The magical conversion takes place. (proprietary work of course)
3)    A freshly restored R-390A and a check for $1000 is sent back to your 
location. (several valuable parts
        removed from the 389...the value of which is returned to the 
rightful owner of course)
4)    Everyone lives happily ever after....or for 90 days whichever comes 
first.

That's the only way I can see it possible to do what you desire.

Happy Holidays to Everyone!

Cecil Acuff
Gulfport MS...
Current home of:
8 R-1051's
6 R-390A's
2 SP-600's
1 SP-600VLF
1 SX-28A
1 Icom R-75/Kiwa
& too many other Cats and Dogs to list...
I'm in rehab I promise...

----- Original Message ----- 
From: <eldim at att.net>
To: <paul at pdq.com>; "Barry Hauser" <barry at hausernet.com>
Cc: <r-390 at mailman.qth.net>
Sent: Monday, December 27, 2004 11:21 PM
Subject: Re: [R-390] 390() vs 390(A) vs 389


> Hello Fellow Collectors, Operators, and Maintainers,
> Just thought I'd throw this out for your comments, suggestions, etc. 
> Since there is so little activity on the LF/VLF bands and my 389 has not 
> been getting much exercise, I was wondering how much rework, modification, 
> etc to bring it onto the HF Band?  Has anyone attempted this challenge? 
> In other words upgrade it to a R-390A.  Hope everone had a wonderful 
> Christmas, and a restful holiday. May the New Year bring each of you PEACE 
> and PROSPERITY.
>
> 73,
> Glen Galati,  KA7BOJ
> Tacoma, WA
> eldim at att.net
>
> -------------- Original message from "Paul H. Anderson" 
> <paul at pdq.com>: -------------- 
>
>
>> On Sun, 26 Dec 2004, Barry Hauser wrote:
>>
>> > Hi John & list
>> >
>> > There is also the R-391, which is basically the same as an R-390 with 
>> > an
>> > electromechanical autotune mechanism added. There is an extra 8-channel
>> > knob, little window showing the current channel and special MC and KC
>> > knobs with locking keys.
>>
>> Don't forget the R-389, which is about as much alike as it is different.
>> The frame is very similar to the R-390 frame (maybe the same, I haven't
>> looked real closely yet), and uses the same IF, AF and PS. Early R-389's
>> used a PS with different output B+ wiring. Supposedly these were
>> retrofitted so that PS's were compatible across the R-389/R-390 and R-391
>> (MOD-1, I think).
>>
>> The VFO and RF decks of the R-389 are very different, and there is a
>> rectifier stack for producing DC for the R-389 tuning motor. Oddly, the
>> R-391, which also has a DC motor for tuning, doesn't have the rectifier
>> stack. There probably wasn't room, if I had to guess.
>>
>> Paul
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