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Hi Steve I don't think that there is any design error. Most of the band designs come originally from the G-QRP technical pages, which in turn got the component values from the legendary design by Ed

The VFO's "feature" of galloping up or down in 10kHz increments when the Raduino's VFO pot hits the stop is driving me crazy. I made a fix, picture attached . Also a video

I wonder if anyone in the group has experience with QRP Labs Low Pass Filter kits? I recently built 10 of them - one for each band 160m thru 10m - and found that on some bands the "knee" of the filter

Brian, I'm going to replace the 25mHz crystal on the SI5351 board and see if that's the culprit. ?If so, I'll let you know. ?I had to order 5 of them so if it works I'll send you one to try. Mark

So Mark and I are having the exact same no receive problem. I've reprogrammed my nano thinking maybe something was amiss but that didn't help. Mark replaced his 5351 board including the nano with a

Thanks Dr Fred. I have never messed with the raduino. Changing a sketch scares me. I do need to learn more about how to read the file/sketch save the file and modify the file. Maybe I didn't explain

You might look here: ??/g/BITX20/message/22764 ( /g/BITX20/message/22764 ) and maybe here: ??/g/BITX20/message/21027 (

I just completed my BIT40X and can only get about 1 Watt of RF out. I turned the bias adjust pot fully clockwise and read a current of about 200 ma from the power supply. The instructions say it

I just uploaded: PurdumRotaryEncodersRevisited.doc and PurdumEncoderArticle.doc? which are the rotary encoder articles I wrote for QRP Quarterly. Perhaps those will help. Jack, W8TEE To:

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* PurdumRotaryEncodersRevisited.doc *Uploaded By:*

Hello, This email message is a notification to let you know that a file has been uploaded to the Files area of the [email protected] group. *File:* PurdumEncoderArticle.doc *Uploaded By:* Jack

I finally got the high side vfo code working by removing c91, c92. I found if left in place the vfo did not work above ~10MHz. So if anyone is planning on using the commented out USB code in the

I am very confused. I find several sketches and many references to using an encoder for tuning. Is there a set of complete instructions for installing an encoder (where to hook it up to which raduino

I need to explain. I have a TBI, that sometimes causes me to need something reexplained in a different way. Also I have cerebral palsy, so my son would be building the kit for me. I haven't the

inexpensive...simply.....yet very functional......mostly great fun!!!!

Dr Fankinstein would be proud KD8CGH <rkayakr@...> wrote:

Craig, you would need greater resolution when you want the tuning range to cover the entire 40m band (instead of just a 50kHz segment). currently: single turn pot => 300 degrees rotation => 1000

I figured out the problem. ?I had the Sparkfun board selected. ?It is fixed now and your fixes to the sketch worked to get the calibration corrected.

Good afternoon Michael, Much easier to do it in the sketch. With your method the switch has to be a break before make or you stand a chance of creating a short if the pot is at the +5 volt end and

Brian Lewis, I replaced the SI5351 board that has the Raduino on it with one from another BITX40. ?It is now receiving. ?I've got some 25mHz crystals coming and I'll see if mine is bad. ?Also in