[MRCG] 2013 MRCG Event After-Action Report...800hz stuff

[Thekan, Paul]

 Mike Hanz has bought in the past some type of commercial power supply on Ebay that can do 800hz at 120vac. He posted some info on this on the milsurplus reflector some time back. He may have other info that may help too. He also has a wonderful web site.

 The 28vdc/ 110vac 800hz aircraft inverter is the screaming meme...have yet to run the MG set I got at MRCG. Dennis said it is loud but it can't be worse than that inverter
 
 You can email Mike at aaf-radio-1 at aafradio.org

Paul / FEG


-----Original Message-----
From: mrcg-bounces at mailman.qth.net [mailto:mrcg-bounces at mailman.qth.net] On Behalf Of Mark J. Blair
Sent: Thursday, May 09, 2013 3:31 PM
To: West Coast Military Radio Collectors Group
Subject: Re: [MRCG] 2013 MRCG Event After-Action Report


On May 9, 2013, at 14:00 , Joseph Pinner <kc5ijd at bellsouth.net> wrote:
> Am jealous of your purchase of the GP-7 equipment. I have a TBW I am working on and am facing the 800 cycle power issue, too. We need to share any solutions with each other.


It was an impulse buy! Paul Thekan picked up a BIG motor-generator set at the meet that he's going to use with his sets. I'm told it's very loud, but due to magnetorestrictive (is that the right word?) effects rather than the siren-like blower on the 800-1 dynamotor.

I've considered several approaches, including:

* Modifying a UPS to output 800 Hz. Ray Poularas says he's done this successfully.

* Modifying a solid-state inverter to output 800 Hz. I'm presently leaning towards getting a cheap 24VDC input inverter off eBay and trying to modify it.

* Use a variable frequency drive. I didn't find any with the right combination of input voltage, number of phases, maximum output frequency, and affordability.

* Use an original 800-1 dynamotor. I'm told they nearly double as sirens.

* Use a motor-generator set like the monster that Paul bought. I'm told they're very loud, too.


-- 
Mark J. Blair, NF6X <nf6x at nf6x.net>
http://www.nf6x.net/

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