[R-390] New R390

Thu May 23 00:08:18 EDT 2019

Let's see, a man's radio, a boy's radio, and now a lady's radio.  That's amazing.  What criteria did you use to come up with this?  Assume you have heard an R390 and an R390S, but have you heard an R725?

Inquiring minds want to know!

73s,

Joe

-----Original Message-----
From: r-390-bounces at mailman.qth.net [mailto:r-390-bounces at mailman.qth.net] On Behalf Of Renee K6FSB
Sent: Wednesday, May 22, 2019 9:35 PM
To: William J. Neill <wjneill at consolidated.net>; jgedde at optonline.net
Cc: R-390 List <r-390 at mailman.qth.net>
Subject: Re: [R-390] New R390

The R725 is the ladies radio, cute and pleasing audio....not sure about the 389 Renée, K6FSB

On 2019-05-22 7:23 p.m., William J. Neill via R-390 wrote:
> 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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