[R-390] Rack Mounted R-390A

Barry Hauser barry at hausernet.com
Mon Feb 6 21:03:51 EST 2006 

Hmmmmm....  a difference of opinion.... Some alternative solutions....

1.  Mount rails to the ceiling with movable hoist.  Recommend cutting 
through the sheetrock or whatever to secure with 3/4" U-bolts around the 
rafters.  Attach chains with padded hooks to front handles, move receiver 
out of rack halfway and attach rear chains, etc.  Use suitable manual or 
electric winch.

2.  A skyhook.

3.  Difficulty wrestling with R-390's?  Keep two extras -- unrestored blue 
stripers --  for use in workouts.  When you build yourself up to the point 
where you can hold two of 'em out straigh-arm for 10 minutes, you're ready 
to rumble. (Whatever you do, do not read the fine print warnings on your 
blood pressure meds.  Heck, those final words on the commercials give me 
palpatations.)

4.  Remove all equipment from rack cabinet.  Place horizontal bar approx 9 
inches down from top crossways.  Use it to hang your coat.  Put '390's on 
benches, desks, etc.

5.  Rackless rackmount -- Cut 6.5 foot X 18.5 inch hole in interior wall. 
Will be necessary to either (a) move 1 stud out 2.5 inches if 16" spacing or 
(b) install additional stud if 24" spacing.  Stack up radios thru-wall.  May 
be flush mounted to save floorspace.  Make power & antenna connections in 
adjoining room.  (Ignore complaints.)

6.  Report to kitchen.  Remove and dispose of microwave as per manual 
instructions regarding prevention of enemy use (or put it in the living room 
so you can save steps when warming up your pizza -- put it on top of a small 
fridge for handy brewskies.)  Not efficient where it is anyway.  Place 
R-390(A) in place of microwave.  Or, leave the microwave where it is and put 
the R-390 on top of the fridge.  If anyone asks, the decor is "eclectic". 
Depending on your kitchen "motif", you may have to refinish the front panel 
in natural brushed aluminum (to match the latest greatest stainless steel 
look), gleaming white, or whatever.  Probably not much concern about 
matching to avocado these days.

I could go on ... or y'know what, just get the angle iron or angle brackets, 
but I'll tell you this .. nobody has smashed a radio or gotten smashed (well 
except for the brewskies), with my methods. heh heh.

Barry



----- Original Message ----- 
From: "Tom Norris" <r390a at bellsouth.net>
To: <r-390 at mailman.qth.net>
Sent: Monday, February 06, 2006 12:54 PM
Subject: Re: [R-390] Rack Mounted R-390A


> The reference is on page 5 of TM 11-5820-357-20 manual in the 
> installation section, it says --
>
> "Caution: When the receiver is installed in any cabinet other than 
> described above, adequate ventilation must be provided. For mobile 
> applications of the receiver in cabinets other than Cabinets,  Electrical 
> Equipment CY-979/URR and CY-1216/U, support must be  provided at the rear 
> of the receiver, so that the front panel does  not carry the entire weight 
> of the receiver."
>
> Similar info for the 390A is found in paragraph 6 section 6 of AFTO 
> 31R1-2URR-422/TM 11-5820-358-20  (page 10 of feb '61 printing)
>
> But since folks argue with the manuals about things like solid state 
> rectifiers being wrong, I guess they won't agree with this either.    If 
> the shafts bind, it may be as simple as adjusting the front panel 
> bushings.
>
> I'd rather use the angles that try to wrestle with an 85 pound radio  at 
> shoulder height with one hand while removing screws with another  and 
> keeping it from destroying what's below it in the rack with a  third hand. 
> I've not sprouted that third hand though, no matter how  many vitamins I 
> take, so I use the anglestock.  Slide it in, secure  the front.  No trying 
> to support it while fastening it to the rack.
>
> Tom
>
> On Feb 6, 2006, at 8:53 AM, Todd, KA1KAQ wrote:
>
>> Hey Tom -
>>
>> Mounting by the front panel alone might work, but it can and does
>> cause torque/flexing issues that can cause the PTO to bind up or
>> become stiffer to tune. I have an old AF rack for these beasts with
>> the angle 'shelf' pieces built right in and the correct intervals. It
>> almost seems like there are references in some TM not to mount by
>> panel alone with no rear support, but I can't recall.
>>
>> de Todd/'Boomer'  KA1KAQ
>>
>> On 2/5/06, Tom Norris <r390a at bellsouth.net> wrote:
>>
>>> Hank is correct, but it makes a whole heck of a lot easier to get in
>>> and out of the rack if you put in those angle bits.  HP supplied
>>> those sort of angle "shelves" in some of their larger equipment
>>> system racks for just that reason. (I think it was HP...)
>>>
>>> Tom
>>>
>>>
>>> On Feb 5, 2006, at 6:15 AM, Dan Arney wrote:
>>>
>>>
>>>> 1000's of them have been mounted by the front panel only with no
>>>> problems.
>>>>
>>>> Hank
>>>> KN6DI
>
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