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

[eldim at att.net]

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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