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I decided to hack around the issue with a little external phone/mic interface box, made from a "deluxe" AAA battery case: This connects a conventional headset and mic input and provides a PTT button,

This sounds an awful lot like the problem the NORCAL guys had when they released the 38 Special transceiver kit many years ago...They nicknamed the issue 'The Thump" .Not sure they ever came up with a

The schematic that someone showed earlier was ingenious because it used one of the transformers as a stepUP transformer to drive the rectification circuit....that makes it easier to turn the

The Signalink USB has it's own VOX circuit. An opto coupler. You will still have to make your own cables. Around $120. So the other options are cheaper. Bernie, KC9SGV Sent from my iPad

And keep in mind that on the B40 the cap across the PA Power pins is only a 25 volt electrolytic. Vince.

Looks like that site has not added new drivers for radios in years... and the newest ones appear to be geared to VHF handhelds? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ

It seems like everyone is now focused on ubitx. I hope someone can assist me in getting my "old" bitx 40 up and running again. It has been down (receiving great, no transmit) for a few months. Today I

Ups... !!! We are working on similar approaches, but I'm on the draft board yet. Last night I was drafting a Chirp driver for the actual ubitx code I found here: https://github.com/afarhan/ubitx.git

Yes...Isolate the radio from the computer using transformers and optos...bad things happen with rf and ac otherwise... Check out this simple interface...Its the one I use..W9XT even shares the

i have been trying to hack out the tx pop. it is a far more intricate problem than it does seem at first. to cut a very long and painful story short, i am not yet there. but i have a partial solution.

Hey, I got 2 SI5351 PCBs and Kits.? Better too!? Don't buy elsewhere. Small or Lotsa Clocks with extra I2C Address and 8 clocks (the 20 Pin IC). Ha.. Ha..? Ask Vince on this list about Lotsa

If your computer has a serial port ( or use a usb to serial converter) you should beable to configure the software to generate a ptt signal that would go to your radio's ptt port..I am assuming the

I ordered a couple of the Adafruit boards. Basically the?same thing already assembled except for the header pins. ? -- John - WA2FZW

Thanks Jack, given the current inability to get raduinos, that is a viable alternative that i've considred. Right now I just built my first swr meter kit and have mapped out (this is new stuff for

https://github.com/ggibby1/BitX40-1.24-FT857d/blob/master/raduino_v1.24GLGchangesWorkingCopyBreadPanwithCAT2.ino It wasn't hard at all. The levels appeared to be very similar and in my case the vfo of

If you're going to use the Si5351, take a look at QRP-Labs Si5351A synthesizer kit. Jack, W8TEE To: [email protected] Sent: Monday, January 8, 2018 2:44 PM Subject: Re: [BITX20] Digitally Controllable

Yes, sorry, I meant it was a shame that the LCD voltmeter module was very noisy.

Gordon. Are the details of your work published anywhere? I'm about to try the same trick on my?old Swan-250C (single band) 6 meter rig. I'm debating whether or not to use Jack's basic VFO circuit &

Many people have done this on their Bitx40s with around 20 watts out at 24-28V supplying the final output transistors.... ...and with appropriate additions to the heat sinks on the finals. Jack, W8TEE

I just weighed the whole kit in the plastic box that it came in at 15 ounces. It's hard to imagine a much lighter enclosure. The documentation on line has suggestions about adding a narrower filter