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Yay Marco. There are so many hacks/mods on this simple little radio. I am hoping most will remember that this is a very good QRP radio. QRP in itself has it's own set of challenges and roadblocks.

Rafel, See my comments below: Yes, the lack of matching keeps the circuit simple but you pay the price of less than the best achi

Thanks, that one worked. Roy WA0YMH

Repost of link https://youtu.be/f8VYHC6nkrk Art Sent from my iPhone

Jack, Thank you posting these two files. I was just starting to work my way down the path of integrating a rotary encoder into my project. Ashar's use of pot and ADC as a control for frequency is a

Bad link to YouTube video. Roy WA0YMH

I just designed an had PCBs made for tiny (.6x.8") 5351 board. It has 2 four pin connectors for power and I2C and then output on the other side. I now have 40 oscillator modules? I only built

Simple and elegant solution. I like how this works. Seeing it in action, it makes more sense. Time to get some push button switches. Marco - KG5PRT

Steve, I just entered the L and C values that QRP Labs lists for the 20 meter LPF into AADE filter Design. The analysis shows only a .03 dB loss at 14.5 MHz and doesn’t exceed 1.5 dB until above

This is what I tried to explain. Thanks to Dave Casler KE0OG. See https://youtu.be/f8VYHC6nkrk Sent from Mike's iPad WA1MAD

Hans - thanks for that. Maybe I just got unlucky with a combination of capacitor and toroid Al tolerances. I think I've seen the figure of 10% quoted by Micrometals for the Type-6 material. Steve

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: