A cheap 3.4 GHz (9cm) transverter
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- Опубліковано 8 лют 2025
- A look at my recently finished 3.4 GHz (9cm) ham radio transverter using an old ISP subscriber panel from VK3ATL.
Stealth Amp on eBay:
geni.us/nwqJTp
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Nice to see how these parts go together. Looks clean in there.
Thank you, it's a great band to experiment on. Contact SGLab about a new 3.4 GHz transverter now. I have replaced the board in here with one of those transverters.
It's great to see others put some effort in making videos as well. Feedback over the years ago told me my own videos helped quite a few along the way, as will yours. It's such a pity that Gippstech isn't streamed, which would help bring much needed new blood into the hobby.
I learned off your videos for sure, much of my design layouts were "borrowed" from there :). I will be attending Gippstech this year and I will also be making a presentation on repeaters. Perhaps I could use this channel to have a Live Stream of Gippstech. Seeing as it is at a University, I get free WiFi so it wouldn't be hard at all :)
You have an sg labs transverter in there now? How do you attenuate the power from the sg labs transverter to the stealth PA. I have both but not sure how to wire everything and the proper power levels.
ua-cam.com/video/YnULPw_AK_8/v-deo.html
In this video presentation you will see at 1:16:50 my setup. Split the RX and TX/RX paths by moving the jumper in the SG-Lab transverter. RX then goes to your coax switch (or in my case via a preamp).
There is a SMA attenuator, the black one on the TX output of the SG Lab transverter to the Stealth amp to drop the 2.5W down to the correct drive for the Stealth. From memory it needs... 0dBm? So that means you'd need to use 34dB of attenuation. I think I used a 30dB attenuator from eBay. Then I have an additional 3dB SMA on that, so about 33dB or so. The amp is well into saturation for full output power. I hope that helps?
@@HamRadioDX Yes that makes perfect sense. Thank you very much!
What are you using to switch the 5v on and off logic with the stealth amplifier?
A Minikits sequencer - www.minikits.com.au/electronic-kits/sequencer/Sequencer
RIP 9CM