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Interesting idea. You might want to look at the Si4732. Essentially the same but easier to solder. I used the si4732 in my first from scratch build after building the ubitx. You can see it here:

I used these https://www.mouser.in/ProductDetail/815-ABM8-40-B2-T

Those are third overtone crystals. That makes them unsuitable for a 40 MHz crystal filter. You need fundamental mode crystals. Here are some Mouser parts that might be suitable and are in stock at

I bought a few of these last year and didn't get round to doing anything with them, was toying with the idea of incorporating one of these into the uBitx for advanced audio handling on Rx, there's a

Are these good enough or should I look for better stability... https://www.mouser.ie/ProductDetail/ABRACON/ABL-40000MHZ-B2F?qs=sGAEpiMZZMvy%2Fng1omLrvZODcDhykt8Z or should I be looking at this which

Hi Ashhar, Can I get some specs on the 40Mhz crystal that should be used, I want to put in an order with mouser very soon ? Best regards, Peter.

Dear Jerry, I had the same issue. What I did was to remove the Nano from the socket in Raduino and connect it directly to the Laptop with USB cable. Selected the right com port , Board: Arduino Nano,

For a battery powered shack and field use, OH8STN/Julian's videos and blog are excellent. His main focus is QRP field work for 'grid down' comms.? He's using some high-end flexible solar panels in

Yes, Raj, I remember that.. The raspberry pi zero is probably running out on the FFT routines. The UI thread does nothing until something is physically touched or changed. One option is to use the

I've built very similar circuits.. standard low noise input preamp for magnetic cartridge in vinyl record players. Only difference is that there are some additional components for RIAA

Best source for info like that is a manufacturers data sheet. Second best is a comparable gel cell battery data sheet. https://www.power-sonic.com is my goto. BTW, that is likely 3.75 or 4 A-h or

Hello to all: I was given a 12 volt jell cell battery. It is either 3.75 or 4 amps. What volts and amps I need to charge the jell cell? How long will the battery take to charge? Thanks in advance! -

Now that my V6 is modded to my liking the only other thing I wish it had was an AM mode.? This would make for a true general coverage communication receiver.? I actually ran into somebody working AM

I am glad that it works. The audio amplifier for sbitx class of radios needs to have a strong signal handlig capabilities as well. I suggest you hear over to w7zoi.net and duplicate the audio fba

Hi Ashhar, After solving some hardware issues on my little WM8731 board I finally made it work, first with the alsa-utils then with sbitx software itself, hence a little "eureka" for this successful

QRSS comes the closest of no side bands. It is pure 1 frequency switching on and off or changing up or down by 5Hz every 3-6 seconds. Earl Cox? KB5UEW?Reply or E-mail me at:? kb5uew@...

I have been using the DROK ones from Amazon. ?They aren't cheap but then again I was looking for good, not cheap. ?My search was over after buying

Hi, I frequently abuse my transmitters or transceivers as signal generators (finals disabled). It is very handy to have the radio operate at whatever frequency I need without some artificial

Dear Evan, Thanks a Ton, I did the change in the code. In Reed's Firmware, The file is tuner.cpp I change the > to >= and Uploaded the firmware, and it worked like a charm. ~7W out at

Nitin, Your first two points above are the design of the radio.? There is not a limit on frequency for transmission.? That is up to the Ham running the rig. As to point 3, you are correct in that