[ARC5] Bendix Motor Generator

[Scott Robinson]

Gents,

As far as powering 800 Hz items, really large commercial grade audio 
amplifiers aren't terribly expensive, less than $1/watt. That, a 60 Hz 
step up transformer (fine also at 800 Hz), and an oscillator gets your 
mil gear going unmodified.

/scott

On 4/13/15 7:24 AM, Andy Young wrote:
> Hi Roy,
>
> That's all very interesting!
>
> The unit I've got here has never been used, it's still got its tie-on
> label and is in pristine condition.
>
> I don't suppose we will ever know how it ended up in the UK!
>
> It would be nice to get it running one day. Ironically what would be
> more use to me would be a similar machine generating 80v at 1600 c/s to
> run wartime-wra UK equipment such as GEE or H2S. I know someone here who
> does run such stuff at 800 c/s from a US generator, but it's just about
> on the limit for the equipment transformers.
>
> I've emailed Steve Williams, kb4dmf, to ask if he can supply the right
> connectors.
>
> Any extra info on the compensating capacitor would be most welcome, please.
>
> Don't worry, I'll not be modifying, discarding or neglecting it!
>
> Andy
> ----- Original Message ----- From: "Roy Morgan" <k1lky68 at gmail.com>
> To: "Andy Young" <andy-young at supanet.com>
> Cc: "ARC-5 List" <arc5 at mailman.qth.net>
> Sent: Monday, April 13, 2015 2:14 PM
> Subject: Re: [ARC5] Bendix Motor Generator
>
>
>
> On Apr 13, 2015, at 6:02 AM, Andy Young <andy-young at supanet.com> wrote:
>
>> Has anyone got any information on a US-made Motor Generator, purchased
>> by me here in the UK yesterday, please?
>> It is a Bendix Aviation Eclipse Type 800, Model 1, Style D Motor
>> Generator.
>> 24/28v DC in, at 75A, 115v AC 800 c/s out, at 10.5A, 1200W.
>> What system was this used to supply?
>
> Andy,
>
> The 800-1 motor generator is a very rare item.  In the past, I was able
> to acquire just one of these things for my GO-9 transmitter.  Since
> then, none have been available.  The original source is long gone.
>
> The GO-9 is a Westinghouse Navy transmitter that runs on 28 volts DC and
> 800 cycles, single phase 115 volts AC.  The transmitter was used in
> larger aircraft such as the PBY.  It is NOT practical to rebuild the
> transmitter to use 60 cycle transformers.  A search for “GO-9
> Transmitter” will likely find some information and pictures of the very
> few that have been restored to operation.
>
> Mike Hanz has some info:
>> I have some information on it on my website at
>> http://aafradio.org/docs/800-1.htm
>
> It’s possible that I have additional information about the thing, and
> about the compensating capacitor device that was used with it.  When I
> can, I will look at Mike’s site and compare with the info I have here.
> I’ll be happy to send you and Mike anything I have that’s not on Mike’s
> site.  (My internet connection is bad right now.  I have a Drop Box we
> can use to share this info.)
>
> Some comments about the thing:
>
> - It is a SCREAMER.   You will not be able to run it in the same room
> you are in.
> - it certainly will need to be overhauled - bearings cleaned and
> lubricated. Do not run it until you have done this.
> - it has a carbon pile regulator device that may need “encouragement” to
> run properly.
> - The MS type connectors needed to hook it up are available but not very
> cheap.  The thing should not be modified to avoid using the correct
> connectors.
> - It is VERY RARE and should not be discarded or neglected - if you
> won’t use it, then there are other folks who will, and will be extremely
> happy to get the thing.
>
> Other than the one I have and one other that I know of, I have never
> heard of any being owned and used.
>
> I will be very happy to help you find more information and to get it
> running if that’s what you decide to do.
>
> Roy
>
> Roy Morgan
> k1lky68 at gmail.com
> K1LKY Since 1958
>
>
>
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