[Moon-net] Info Needed on Tubes 6943 tube and cavity

[Doug Millar]

OK. I pasted a picture of the amp in one email and it didn't make it 
to the reflector. I have a MCL 11145 cavity amp that tunes from 400 
to 800mhz and has a GL6942 tube in it. It was apparently used in TV 
transmitters and the tube is rated at 1.5kw CCS. Looks new. One of 
three we had in a lab I worked with but were never used. If anyone is 
interested in pictures, let me know. The amp is also for sale.
                 Doug K6JEY





At 12:44 PM 1/1/2007, Doug Millar wrote:


>Hi,
>          I have a couple pictures of the amplifier and can email them
>individually if anyone is interested.
>                  Doug K6JEY
>
>
>
>
>At 11:09 AM 1/1/2007, Jerry Kleker wrote:
> >Hi Doug,
> >
> >I designed a cavity amplifier in 1962 that used a GL6942 (GE).
> >It put out 1 KW at 1030 MHz at 10% duty cycle (for IFF). The
> >power gain was about 10. The first amplifier used 3 adjustable
> >cavities but the final design had fixed length cavities and
> >was relatively compact.
> >
> >I had the machine shop make a second set of cavity parts so
> >that I could try it on 1296 but the parts were lost about
> >20 years ago. I believe that I still have a set of the drawings.
> >
> >I was concerned about cooling the tube with air on 1296 because
> >the tube only had about 10 horizontal cooling fins.
> >
> >The design should work on 432 because the input and output
> >cavities were 3/4 wave long. The G1/G2 cavity was 1/2 wave long
> >but could be modified.
> >
> >Does anybody know if the amplifier showed up on the surplus
> >market?
> >
> >73 and Happy New Year to all.
> >
> >Jerry    W7QX
> >
> >
> >
> >----- Original Message -----
> >From: "Doug Millar" <dougnhelen at moonlink.net>
> >To: <moon-net at list-serv.davidv.net>; <microwave at wa1mba.org>;
> ><sbms at ham-radio.com>; <microwave at qth.net>; <microwave at lists.valinet.com>;
> ><mailto:>
> >Sent: Saturday, December 30, 2006 6:04 PM
> >Subject: [Moon-net] Info Needed on Tubes
> >
> >
> > >
> > > Does anyone have info on the following tubes?
> > > Y 867
> > > 7169
> > > GE 6942
> > >
> > > The 6942 is in a huge 432 cavity and the tube has horizontal fins.
> > > The 7169 is new in the bag about 1962 vintage.
> > > Doug K6JEY
> > >
> > >
> > > _______________________________________________
> > > Moon-Net posting and subscription instructions are at
> > > http://www.nlsa.com/nets/moon-net-help.html
> > >
> > >
>
>_______________________________________________
>Microwave mailing list
>microwave at lists.valinet.com
>http://www.valinet.com/mailman/listinfo/microwave