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Hello,

Has anyone built the Simple SSB Transceiver that was shown on the blog and videos by Charlie Morris, ZL2CTM?

Any suggestions?

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While I was trying to figure out what parts to get for various projects I wanted to work on, I realized that he was targeting a portion of 80m from 3.5 MHz - 3.6 MHz for the Band Pass Filter.? But in the USA, I cannot do 3.5 MHz - 3.6MHz because no voice mode is allowed on that portion in my region.?

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So, I need to move this up. ? And really, since this will be QRP, I do not expect to be getting any DX. And since I would share this with others, most hams would have a General. ? And I probably be more interested in targeting 3.8 - 4.0 MHz since this is where I hear most things anyways. ? So, this is where I need to learn how to do some of the same math he shows in his videos and his blogs to come up with his Band pass filter and IF Amp, etc.?? So, my center frequency for a band pass filter would be 3.9MHz.??

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I looked on kitsandparts for their low pass filter board only and looked at it.? And its links and led me to LTspice which is free so I downloaded it.? So, I will try to reproduce what Charlie did first.? Then proceed with my own stuff.

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I wanted to get toroids from kitsandparts.? But now I am not so sure.? Because now I will need to re-think the project for my region.

If I go with the NE5334 preamp and LM380 amp ICs, they both can be found at Mouser in stock.

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Anyways, I like the video how he went about designing it.? I like the use of the double-balanced diode mixers.? Except, I want to do Manhattan construction on island pads instead of strip board.

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Anyhow, I maybe over my head and need to learn the electronics math and theory here.? But I thought I would see if others have tried first.? I am willing to do my home work.

There are some radios I have built to compare to in the past like Curt's transceiver and Norcal 40A / 40B.? So, there might be things there I could learn from including its book EOR.

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Charlie did mention he used the book Solid State Design for the Radio Amateur as a guide.

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Anyways, when I was at Adafruit, I noticed they were low on their Si5351A breakout boards.? So, I ordered some.

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I liked how Charlie Morris showed the math how he determined values he got.? So, that is a good starting point for me.? I just got to figure out where he got that from.

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I even looked at the band pass/low pass filters at QRP Labs, but they take about a month to come from Turkey - and that is during good times.? Not sure how things would be now.?? I do have a low pass/band pass filter from them for 40m but not 80m.?? But the filter is centered for CW - not SSB voice portions of the band.

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Thanks,

Daniel KK4MRN

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