[R-390] Rack Mounted R-390A
Patrick
brookbank at triad.rr.com
Tue Feb 7 16:53:55 EST 2006
My idea is levitation using a superconductor and a small magnet.......Pat
----- Original Message -----
From: "Cecil Acuff" <chacuff at cableone.net>
To: "Barry Hauser" <barry at hausernet.com>; "Tom Norris"
<r390a at bellsouth.net>; <r-390 at mailman.qth.net>
Sent: Tuesday, February 07, 2006 11:15 AM
Subject: Re: [R-390] Rack Mounted R-390A
> 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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>>
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>
>
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