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True, but the 26-pin GPIO connector has been retired by the Raspberry Pi organization.? All the newer Pi boards use the 40-pin GPIO connector.? Plus the 40-pin GPIO gives you the expanded I/Os,

It should work right out of the box, once you have followed the wireup instructions from hfsigs.com. If it doesn't, check all those coils for cold solder joints, broken wires, and shorts, as that

Hi Peter, several of us in the Barrie WAX Group have our BITX40v3 on the air now. One mod that really helps is to use a 10 turn pot for tuning (the single turn that is included is just too touchy when

That's exactly where I am. I have not yet had time to dig into this any further. I am planning on writing an Arduino sketch that switches between two different output frequencies, so that I can follow

Yes, Just build it stock, don't hook up transmitter power. Get Rec working first. Get tunning working with Pot and or modifications with Sketch and 10T pot. Figure out a box and where everything needs

I am getting the Min SWR: 5.00? at Freq: -3117200 message using a dummy load or any antenna.? I have tried using both antenna inputs using plain wire and tiny coax, all with the same results.? Any

My first guess would be poor performance on 20m is due to the board layout around the IRF510. So maybe replace those parts with a final built ugly style on a small piece of copper clad FR4, then glue

Hello group, I've had my Bitx for a while and am just starting to put it together. I've been reading this list off and on but now so much has happened with the mods I almost don't know where to start.

I'm looking to build towards future expansion, so I was thinking about a DPDT power switch since I'm replacing the audio gain pot to have a matching style knob with my tuning pot. One pole supplies

This is sort of early, but I'd like to use the BITX40 to help more people in our local ARES group get on HF (many of them were VHF-only) -- and in the longer run I think they are going to need a bit

Great to see the work you guys are putting in to multi band trancievers .Personally I find the units so small that when I want another band I would buy another unit , my choice is 20M. I am wondering

I'm doing multi-band as well, with modular filters. So far it works great on 80 and 40 (and presumably 60 once I build the filter!) but on 20, output is reduced from 5-7w to about 1w. I'm definitely

No joy tonight. Heard WB2BLJ, N2CQR and W0OIC. No response to my CQ's. At 0347 UTC the interference from 7.275 AM is totally wiping out 7.277 - 20 over S9 on my Kenwood rig. Same transmitter peaking

Busy updating my BitX to v. 1.27.1 and watching the Patriots vs Broncos. You must load a new library, "PinChangeinterrupts" to get v1.27.1 to upload. Go Pats,Willy W1LY wrote:

You might take a look at Bill N2CQR's (he of SolderSmoke fame) rigs. He runs these up at 17m and I think 12m, and their (essentially Bitx) amps have an extra transistor. Pete N6QW ((his chat-partner)

Richie, I have been thinking of this same issue. My BITX40 on 20 meters is slightly deaf on 20 meters. I own an Hendricks BITX20 ( http://www.qrpkits.com/bitx20a.html (

Hi John...only heard WB2BLJ calling CQ but no joy yet. Did hear someone else but very fast QSB and couldn't get a call - might end in an "A".

Been calling CQ since 7 EST. Hearing nothing buy noise. Not even broadcast stations! -- John - WA2FZW

Thanks for all Michale?it's about bfo no vfo. Vfo is with dds. the solution would be an extra buffer or the use of dds. Thanks! Bogdan,yo3ifx

Well I understand since I’m not an early riser but VK6BQQ did join us and Indonesia has in the past. Mike K5ESS Sent: Sunday, November 12, 2017 13:56 To: [email protected] Subject: Re: [BITX20]