[Amps] Please help ID this ETO PA chassis

[Carl]

Id be interested in the driver and final tank circuits if they will not be 
used. They would be nice to have just to study.

Carl
KM1H


----- Original Message ----- 
From: "Keith Morehouse" <w9rm at yahoo.com>
To: <amps at contesting.com>
Sent: Wednesday, March 09, 2011 10:46 AM
Subject: [Amps] Please help ID this ETO PA chassis


> AMPS-listers:
>
> I needed a quicky chassis to prototype a new PA and recently purchased 
> this on
> EBay:
>
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&rt=nc&nma=true&item=120691460254&si=Zi9jCTjwufxwdIxjeQ30O0sC%252BAM%253D&viewitem=&sspagename=STRK%3AMEWAX%3AIT
>
>
>
> What I received is a date-code 1991 ETO PA+IPA chassis, originally using a
> 3CPX800A (under chassis mount) driving a YC-156 (the custom spec 
> 3CPX5000A7
> socket-less tube).  I assume this was either a prototype (or short 
> production
> run) MRI 1.5T or 3.0T amplifier.  Looking at the PA compartments matching
> components, it's obviously a mid-VHF network, probably somewhere right 
> above
> 6M.  I'm not recently schooled in MRI engineering, but I believe there 
> were (are
>
> ?) units that operated around 60 MHz.  Since my proto is for 50 MHz, I'd 
> like to
>
> try and use as much of the existing system as I can.
>
> Referring to the EBay pictures, can anybody ID the original operating freq 
> of
> this chassis ?  Does anybody (John, W0UN ?) have any design info on it ? 
> It has
>
> several ETO P/N's, including several in the series of MSX-X9**.  The date 
> code
> is May 1991.
>
> Whatever it turns out to be, it looks like it'll cut a lot of time off my 
> design
>
> since I won't have to cut much metal and it has a real nice blower + nice 
> usable
>
> "stuff" included.
>
> TIA
>
> Jay W9RM
>
> Keith J. Morehouse
> RF Specialists Inc
> PO Box 849
> Hampshire IL 60140
>
>
>
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