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Hi Randy, ? ? your Youtube review was what pushed me to Order my Bitx40 on march 27 i have not seen anything about when shipped yet I'll update with more info when i get it. 73 KG7MNK

You can jumper over, better remove. What I do is desolder both ends and move the SMD and let one end be soldered so I can put it back later if needed. Raj

I've not done a lot with the Raduino as i m using a after market VFO unit on my main BITX-40, On my other BITX-40 I've kept it basically standard other than change the frequency coverage of the

Yes I would be interested to try this out! I'd like to try if we can include this in the standard raduino sketch, replacing the etherkit si5351 library. 73, Allard PE1NWL

I got USB working by simply increasing the VFO drive level in the software. It wasn't necessary to remove the caps. Just change 4MA to 8MA in line 654 (in

Indeed, I wanted to use USB for digital, and so I changed my QRP Labs VFO from offset from - to +. I could hear signals, but *really* quietly. I'm just going to jumper over c91 and c92 rather than

The reason its quiet is because USB uses high side vfo and c91, c92 are shorting out the signal from the vfo. To get USB the vfo is changed from 5MHz to 19MHz. Remove c91 and c92 and it will

There is something that took a while for me and others to understand and accept is that the BITX40 is a lower single side band phone mode transceiver. Making it do anything else is impractical and

I modified the 1.05 Raduino sketch to monitor D7 and flip the state of the "isUSB" variable so that the tuning function would change the injection frequency to allow USB detection. The firmware change

Here's a thought, those with a Nano might be able to use it to sequence the transition: ? ? ? Mute audio with a FET at volume pot, ?shut down any transmission with another FET at BPF ? ? Wait

I got my bitx40 mounted in an old aluminum baking pan ($.50 at local thrift store) and finally hooked up TX power. No QSO's yet, but the TX works, and when I lsten on my "big" radio, the audio, using

Joe, Last week I tested this suggestion and it does not help much. It reduces the pop but not much. Next week when I am back in town I will try some other ideas and see. Switching the 12V on/off is

ordered - 03/12/2017 shipped - 03/20/2017 received - 03/30/2017 sn - n3-617 N5PAN (Mike) JARC Member 100WattsID: 850 NAQCC: 8300 SKCC: 15296

update ordered 3/25 shipped 3/29 arrived 4/5 serial = N3-867 qth = Orlando FL 73 Miguel? N4MMT

update ordered 3/25 shipped 3/29 arrived 4/5 serial = N3-867 qht = Orlando FL 73 Miguel? N4MMT

Ten-Tec and Heathkit? (I think Swan too) did it for years... the sidetone you heard in the speaker when transmitting was the same tone applied to the transmitter audio section. Mic disconnected. plus

I thought that the Si5351 chip on the Raduino used Etherkit libraries rather than Adafruit. Does it make a difference? Or would they both work?

I've been reading this long thread with interest.? It reminded me of somthing familiar in the past and it just dawned on me what it was.? I've written vertical market software for a little over 30

Hi Also, watch Farhan's video about receiver troubleshooting <https://www.youtube.com/watch?v=R8G8XAwq38A>. He uses an 18-24" piece of wire that injects noise into the receiver path. In my

I've slept since then, but wasn't there an issue with this before where one Si5351 library had three function arguments and another version of the library had two? AH-HA!! This could be the