[R-390] New R390

[Joe Koester]

I would like to know too.  I would love to have an R389 even more so than my
R725.  Though I really don't know why!

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net]
On Behalf Of William J. Neill via R-390
Sent: Wednesday, May 22, 2019 9:23 PM
To: jgedde at optonline.net
Cc: R-390 List <r-390 at mailman.qth.net>
Subject: Re: [R-390] New R390

And I wonder where the R-389 and R-725 stand in this pecking order?

Bill Neill
Conroe, Texas\

> On May 22, 2019, at 20:26, <jgedde at optonline.net> <jgedde at optonline.net>
wrote:
> 
> "The R-390 is a mans radio, the R-390A is a boys radio." I'd love to 
> hear more about why that is...  I wanna be a man!  LOL
> 
> I fixed two more issues tonight  The big giant 10 uF Vitamin Q B+ filter
cap was acting up and causing the hum (ripple was falling below the dropout
voltage on the regulator.)  I hid a modern electrolytic down inside and
abandoned the monster oil filled unit in place.  Another issue was a metal
shaft for the antenna trim...  Needs to be non-conductive.  I lathe turned a
new one from Delrin - issues (overloading) gone.  Fiberglass might be nicer
and strongerbut I don't have any.
> 
> John
> 
> -----Original Message-----
> From: Les Locklear <leslocklear at hotmail.com>
> Sent: Tuesday, May 21, 2019 8:41 AM
> To: jgedde at optonline.net; 'r390a' <r-390 at mailman.qth.net>
> Subject: Re: [R-390] New R390
> 
> In the immortal words of Neil Clyne G8LIU "The R-390 is a mans radio, the
R-390A is a boys radio."
> 
> Les Locklear
> Dx'ing since '57
> 
> 
> 
> ----- Original Message -----
> From: <jgedde at optonline.net>
> To: 'r390a' <r-390 at mailman.qth.net>
> Sent: 5/20/2019 6:32:27 PM
> Subject: [R-390] New R390
> ______________________________________________________________________
> __________
> 
> Hiya all,
> 
> My new to me R390 arrived Friday.  SN 2445.  It's a bit of a needing TLC
beast, but as of tonight I got it receiving stations.  A lot more to do, but
I'm making progress....  This time I'll post a "before picture."  It's not
strictly a "before" photo since I've done a lot of cleaning, but it's how
she stands right now.  Ugly but not for long...
> 
> I fixed the power regulator circuit, aligned the IF, fixed the AF deck.  A
lot of burned up and/or broken resistors as a result of a tube failure
(cracked glass and short).  Right now, the RF stage is woefully out of
whack, the unit jumps frequency (by 30 kHz or so) randomly (cause TBD), the
squelch doesn't work, the antenna relay is marginal, an intermittent issue
where it goes dead until I cycle power, or it starts humming bad until I
> cycle power (almost like a LF oscillation), etc.    I thinks it's a B+
> oscillation in the regulator.  I'll get it sorted out. 
> 
> So far my observations are that the R390 has smoother audio and is much
more stable (apart from the frequency jumping) than my R390A which allows
ECSS on the R390 which I can't do for more than a short time on the R390A.
But as a negative, the R390 puts out an huge amount of heat from the
regulators!
> Definitely a winter radio.  Heats the room.  Apart from that my complaints
are that the R390 is not as easy to work on as the R390A.  Not even close.
> 
> John
> 
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