[R-390] Rack Mounted R-390A

Cecil Acuff chacuff at cableone.net
Tue Feb 7 11:15:11 EST 2006 

I've considered designing a small roll around self contained hydraulic lift 
to assist in getting them from the floor to the bench....or maybe 
pneumatic...

Would be a great help as one gets older and these radio's get heavier....

Cecil...
----- Original Message ----- 
From: "Barry Hauser" <barry at hausernet.com>
To: "Tom Norris" <r390a at bellsouth.net>; <r-390 at mailman.qth.net>
Sent: Monday, February 06, 2006 8:03 PM
Subject: Re: [R-390] Rack Mounted R-390A


> 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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