[ARC5] Vibrator Power Supplies

[Bill Cromwell]

They should have used solid state multivibrators to avoid accidental 
ignition. Yes I know - April first is a long way down the calendar. With 
snow, ice, and cold weather landing on us I am already anticipating April.

I don't have or use dynamotors. Are those end bells air tight? I am 
thinking there would be sparks at the commutators. The vibrators I have 
seen (years ago) looked like they were buttoned up pretty tight in 
crimped/swaged metal cans. Maybe dynamotors are more reliable than 
mechanical vibrators? Maybe the engine induced vibrations caused 
vibrators to um... 'stutter'. Honest questions and my own speculation.

73,

Bill  KU8H

On 11/20/2017 09:11 PM, D C _Mac_ Macdonald 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?
>
>
> 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
>
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-- 
bark less - wag more