[ARC5] Vibrator Power Supplies

Tue Nov 21 15:00:49 EST 2017

I worked in a Motorola shop when there were still plenty of radios
with vibrator supplies. Very reliable, more so than the early
transistor supplies.

On 11/21/17, wa5cab--- via ARC5 <arc5 at mailman.qth.net> wrote:
>
>  Plus dynamotor and inverter brushes create sparks, and many of the larger
> ones are not sealed but pump air through.
>
> There is a practical limit of around 3 or 4 amperes for each contact, which
> limits the power per contact set and led to designs with two vibrators and
> two rectifiers in parallel (PE-125-AX) or several contact sets in one
> vibrator (PE-237).  But the basic design of the electro-mechanical vibrator
> is sensitive to G-loadings in several directions which would make them
> undesirable at any power level in fighter and maybe dive bomber aircraft.
>
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>
> Cc								
> 								
> ARC-5 Mail List arc5 at mailman.qth.net, D C _Mac_ Macdonald k2gkk at hotmail.com,
> Robert Eleazer releazer at earthlink.net
> 							
> 																				
> 					
> 									
> 				
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> None of the switches or relays were explosion proof so I don’t think that
> was a real design concern.
>
>
>
>
> Peter
>
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> On Nov 21, 2017, at 2:14 PM, kg4kgl at gmail.com wrote:
>
>
>
>
> Col. Paul Tibbets in his (auto)biography said he smoked cigarettes while
> flying. He must have not been too worried about any gas fumes.
>
>
> Robert
> KG4KGL
>
> On Nov 20, 2017, at 21:11, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
>
>
>
>
> It just might have something to do with keeping devices that create sparks
> on make and break away from an environment with high octane gasoline fumes
> possible.
>
> 73 de Mac, K2GKK/5
>
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>
> -----Original Message-----
> From: Peter Gottlieb <kb2vtl at gmail.com>
> To: kg4kgl <kg4kgl at gmail.com>
> Cc: ARC-5 Mail List <arc5 at mailman.qth.net>; D C _Mac_ Macdonald
> <k2gkk at hotmail.com>; Robert Eleazer <releazer at earthlink.net>
> Sent: Tue, Nov 21, 2017 1:25 pm
> Subject: Re: [ARC5] Vibrator Power Supplies
>
>
> None of the switches or relays were explosion proof so I don’t think that
> was a real design concern.
>
>
>
>
> Peter
>
>
> On Nov 21, 2017, at 2:14 PM, kg4kgl at gmail.com wrote:
>
>
>
>
> Col. Paul Tibbets in his (auto)biography said he smoked cigarettes while
> flying. He must have not been too worried about any gas fumes.
>
>
> Robert
> KG4KGL
>
> On Nov 20, 2017, at 21:11, D C _Mac_ Macdonald <k2gkk at hotmail.com> wrote:
>
>
>
>
> It just might have something to do with keeping devices that create sparks
> on make and break away from an environment with high octane gasoline fumes
> possible.
>
> 73 de Mac, K2GKK/5
> (Since 30 Nov '53)
> Oklahoma City, OK
> USAF Retired 61-81
> FAA Retired 94-10
>
>
>
>
>
> From: arc5-bounces at mailman.qth.net <arc5-bounces at mailman.qth.net> on behalf
> of J Mcvey via ARC5 <arc5 at mailman.qth.net>
> Sent: Monday, November 20, 2017 19:32
> To: Robert Eleazer; arc5 at mailman.qth.net
> Subject: Re: [ARC5] Vibrator Power Supplies
>
>
>
> They did use vibrators in a lot of WWII equipment. BC659/620 series and and
> BC1306 were just a few examples of that.
> Why they didn't use them in aviation may have something to with the altitude
> and temperatures they may be exposed to?
>
>
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> On Monday, November 20, 2017 8:12 PM, Robert Eleazer
> <releazer at earthlink.net> wrote:
>
>
>
>
>
> The 800 HZ discussions have led me to once more wonder about vibrator power
> supplies.  I have 1945 vintage Aviation magazines that have full page ads
> for this wonderful new invention (the same mags advertise something new
> called the Phillips Screw).  And I have an old Heathkit VP-1 vibrator power
> supply that produces 60 ma at 250V with a 12VDC input.  Let's see, now, do
> we know of any WWII aircraft electronics that require that kind of power?
>
> As far as higher power outputs I have the transformers from an RCA UHF
> Carfone I bought for $1.00 that are for a vibrator power supply.  I don't
> know how much power that can handle but it is probably far more than an
> SCR-522 or ARC-3 would require.  That set had 6146B's, I think
>
> So do we know why vibrator power supplies did not come out in the late
> 1930's and get used in WWII?
>
> Thanks,
>
> Wayne
> WB5WSV
>
>
>
>
> Virus-free. www.avg.com
>
>
>
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