Re: [PNWVHFS] 10GHz Circuit Testing

[James Morris]

I'm in the Seattle area and may be able to help with an SNA which covers 10 GHz. There's a microwave group which meets every 2 weeks, which would be a good place to do this, and others there will have expertise as well as various test gear which might also be of use.

See https://pnw-microwave.com/  (there's a separate mailing list, which I've added).

There will be some input RF from the SNA. What is the maximum that would be thought of as 'cold' ?

Also, do you know where to find more of these amps? :)

James W7TXT

On Fri, Mar 22, 2024 at 3:38 PM Brian McCarthy <rfa...@gmail.com> wrote:

I have a project that will involve re-tuning a pair of very high power (300w continuous) KU band TWT's down to the amateur band at 10.368GHz. Al, W5LUA, suggested that I find someone with test gear that could measure the input and output match (S11 & S22) and tune the input and output in a cold condition before applying any drive RF. In other words, a static test with no power or RF applied to the amplifier other than the test equipment.

The amplifiers will be arriving to the Corvallis area in June. I will be in that area in June and July for my daughter's OSU graduation and move out. I am also there to help my parents who also live in Corvallis. I will be back into the northwest in September and will finish with attending MUD 2024 in Vancouver, BC. After MUD, I will be traveling back to Georgia.

I am hoping someone in the PNWVHFS can help me with the tuning of these amplifiers. I would be willing to travel to someone with the equipment if they can help me. If a successful tuning of one or both amplifiers is possible, it would help me launch a really exciting EME rover project.

Volunteers, suggestions or other thoughts?

Thank you!

Brian

NX9O

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[Ray Cannon - W7GLF]

I passed your message on to W7PUA who lives in the Corvallis area.  He might be able to help you.  I suggested it would be fun to him to meet you when you are in Corvallis.  He is in Adair Village - very close to Corvallis.