[MAMS] [Mw] 3CM PA - GIE T.V. ATV Design

[Zack Widup]

Yeah, I don't think I will be buying one of those soon, if ever. I'm not
trying to work EME on 10 GHz now. I'd probably have to move to a new
location first, as most of the sky is not visible from most of my yard.

I could probably come up with a couple FMM5061's for around $200 and build
my own amp that put out 8 watts. But right now 2.5 or 3 watts is good
enough for most of the work I'm doing on that band.

I have an amp for 2304 that is supposed to be good for 25 watts. Now that
the VHF contesting season is done for 2012, maybe I can get the tine to try
it out.

73, Zack W9SZ


On Thu, Oct 11, 2012 at 9:01 AM, Dr. Gerald N. Johnson
<geraldj at weather.net>wrote:

> The rings are circular arranged quadrature splitter/combiners of the
> branch line style. They are distinctive having four ports at equal
> (quarter wave) intervals around the circle. A rat race mixer ring (which
> can also be used as a splitter/combiner) is bigger in diameter, 3
> wavelengths with 3 segments 1/4 wave between the four ports and a long
> segment 3/4 wave long to complete the circle. As in mixers by Zack Lau
> and the DEMI 10 GHz transverter. Two for mixers and one for LO power
> splitter to the two mixers.
>
> I think many DB6NT power amps come from DL2AM.
>
> Did you notice the price for the 25 watt unit. I got a new car for that
> price in 1973.
>
> 73, Jerry, K0CQ
>
> On 10/11/2012 8:25 AM, Zack Widup wrote:
> > I believe those are power combiner rings. I saw one of the designs
> > used two devices in parallel at the output with a power
> > splitter/combiner ring.
> >
> > Zack W9SZ
> >
> > On 10/11/12, Scott<acepilot at bloomer.net>  wrote:
> >> One thing I noticed on the circuit board...it looks like there are mixer
> >> rings.  I wonder if it is really a transverter...maybe taking ATV
> >> signals from a different band such as 70cm or 23cm bands and taking them
> >> up to 10 GHz band?  I suppose one could take those out of circuiy with
> >> an exacto knife and just use the PA traces...
> >>
> >> N0EDV
> >>
> >>
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