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The 12/11mhz crystal filter is after all IF amps on receive. The IF amps are operating at very low signal levels, most of the gain is in the audio amps. It's the audio pre-amp (a 2n3904 just before

Don First before we assume its a bad relay, reflow each pin and also reduce the transmit drive level. You never know the relay may be okay. I assume you tried more than one band? Make sure you don't

The JackAl board looks like it is a good all in one upgrade to the uBitx. So it looks like, in all but the more extreme cases, people are happy with DSP audio bandpass filters. Crystal CW filters can

That looks like a cool implementation. Is your audio bandpass filter stand alone or is it an add-on to the Sotabeams filter board? It sounds like it is a stand alone DSP filter and display. Is the

You are welcome! Just learning myself. Best regards, 73, Jim

See note on their link https://amateurradiokits.in/product/raduino-clone/ [image: image.png]

I know but I couldn't find the original Raduino on HFsignals

hello all! My beloved V4 uBITX has been working really hard and flawlessly 24/7 in wspr mode for (almost) months at a time. ?The results are impressive...frequently in the top 10 worldwide 2 way spot

Thanks Jim! Where were you three weeks ago?? :) My experience exactly. Your straightforward post will really assist new builders, Dean KK4DAS

Ken, that is the Raduino clone by Sunil.

If you're looking for a cheap VNA this might be of interest. /g/antennas/topic/nanovna_cheap_vna_on/31731387 I don't consider this to be competition at all for the Antuino. --

Jerry, Thank-you for the clarification. I was aware that you can measure SWR with just the scaler values, as I have built a resistor bridge based scanning SWR antenna analyzer, and purchased a cheap

Evan, Looking at the Antuino schematic, it has an AD8307 at the output of the 25mhz filter to tell the processor the magnitude of the received signal. Nothing to tell the processor anything about

I use a simple sofa beams filter in my audio chain. It works fantastic. Check it out at

I am traveling on business, so can not get at the documentation on the CEC software.? From memory I am sure that one of the control shifts the signal on the "roofing" 45 mhz filter to act as a gain

I guess an audio active filter 200hz wide like the Hipermite by 4SQRP might suffice. Il 14/ago/2019 19:59, "Curt via Groups.Io" <wb8yyy@...> ha scritto: Dave I sense we have thrown

Could this be the Raduino link? https://amateurradiokits.in/product/raduino-clone/ 73 Ken VA3ABN

I have ordered my Antunio, and am waiting for delivery, anxious to try it out .? The above comment from Don raises one question for me:? Is it a VNA or SNA.? As I understand the difference is that

Dave I sense we have thrown lots of choices at you.? Except for playing with IF shift, implementing an audio filter is easiest - with many low cost choices around.? Note in most respects the design

Ashhar and Jerry -- thank you so much for the reply and info.? I better understand the general antuino application.? It is not a inline SWR/pwr meter, but it does a thousand other equally or more