[R-390] Autotune ARR-15

Sun Apr 9 20:33:50 EDT 2006

Maybe he is making Margaritas as we type.

Les Locklear

----- Original Message ----- 
From: "Tom M." <courir26 at yahoo.com>
To: <r-390 at mailman.qth.net>
Sent: Sunday, April 09, 2006 4:00 PM
Subject: [R-390] Autotune ARR-15

>I had a ARR-15 with good autotune.
>
> The motor was made by Hamilton Beach so I could mix beverages with it and 
> tune
> the radio.
>
> Roy Morgan has it now.  How is my radio Roy?
>
> Tom
>
> --- Barry Hauser <barry at hausernet.com> wrote:
>
>> I have a couple of '391's and had the autotuners working -- for a short
>> while.  If I were to let one of them just run on (I pulled the plug), it
>> would probably self-modify the 10-turn stops to infinite-turn and
>> theoretically tune the RF deck to UHF, or maybe even Wi-Fi ;-)
>>
>> >From what I've heard, most of the '391's never, or hardly ever, had 
>> >their
>> autotuners in use.  Of course, they require a heavy-duty 28 volt DC 
>> supply,
>> but there's another thing.  The motor is fairly high rpm and geared down.
>> Sounds like a mixmaster or an A/C (not rechargeable) drill -- and no
>> wonder -- motor is courtesy of Hamilton-Beach.  The PTO, it's gearing and
>> the RF deck is stock, but the R-390/URR -- "the man's radio" -- has 
>> somewhat
>> heavier components.  Even so, it puts some stress on things.
>>
>> In addition, it makes a racket and quite a bit of vibration -- not too 
>> kind
>> to tube elements and some other components.  Not great for coils and
>> trimmers, nor probably crystals, for that matter.  An even greater
>> consideration with mechanical filters, in the case of an "A" rendition.
>> Probably a good idea to have a few spares of those and maybe a dozen 
>> extra
>> ballast tubes on hand.
>>
>> I don't know if such considerations helped put the cabosh on the R-391A 
>> such
>> that only 2 were made -- or did even those get fully completed?  While 
>> the
>> autotune is an interesting curiosity -- and does work when it works on 
>> the
>> '391 -- it isn't all that practical.
>>
>> Downright scary when you fire one up.  ("Omigosh!  What's that thing 
>> doing
>> to my radio!  So much for that RF deck alignment I just did!")
>>
>> If you want to get an idea, just remove either or both of the MC and KC
>> knobs from your R-390A or R-390, chuck up one of the shafts in your old 
>> 3/8"
>> Black 'n Decker variable speed drill, and give 'er a spin.
>>
>> Barry
>>
>>
>>
>>
>> ----- Original Message ----- 
>> From: "Les Locklear" <leslocklear at cableone.net>
>> To: <paul at pdq.com>; <r-390 at mailman.qth.net>
>> Sent: Sunday, April 09, 2006 10:52 AM
>> Subject: Re: [R-390] wow... the R-391A does exist
>>
>>
>> > The existence of that particular experimental R391A has been known for 
>> > a
>> > while. There more than likely not a "small handful" to be found 
>> > anywhere.
>> > This prototype and possible one more exist.
>> >
>> > All of the R390X, R-725 were originally built with the X or XC 
>> > designator.
>> > Looks rough as 40 grit sandpaper to me. YMMV
>> >
>> > Les Locklear
>> > Monitoring Since '57
>> > Located On the Gulf of Mexico
>> > Gulfport, MS.
>> > http://www.hammarlund.info/homepage.html
>> >
>> > ----- Original Message ----- 
>> > From: "Paul H. Anderson" <paul at pdq.com>
>> > To: <r-390 at mailman.qth.net>
>> > Sent: Sunday, April 09, 2006 8:38 AM
>> > Subject: [R-390] wow... the R-391A does exist
>> >
>> >
>> >>
>> >> I would not normally post 'seen on ebay', but this is absolutely
>> >> astounding.
>> >>
>> >> There's an R-391 XC-2 radio on eBay - item # 9710078628.
>> >>
>> >> I think I about had a heart attack when I saw it (I'm a big fan of
>> >> R-391's).
>> >>
>> >> I asked the seller to list more pictures of the autotune area - 
>> >> hopefully
>> >> we can learn more about it.
>> >>
>> >> No relationship to the seller...
>> >>
>> >> Paul
>> >> _____________________________________________________________
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>> >>
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