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Curious, I still learn new stuff everyday. I was expecting the REF pin to be high impedance. I powered up a spare Nano??from 5v with some other project's code it it. It draws around 17ma while the

CH340 Datasheet http://tinyurl.com/y853bann http://tinyurl.com/y853bann _._

Hello, list! I assembled my bitx40 last weekend and managed to play with it for quite a while during field day yesterday morning. I got some great contacts much further away that I thought I would

Raj, When the trace burned it also burned only the TX side contacts on K1 which didn’t alow RF to get to the receiver. Replacing K1 solved all problems, everything is working good now. Fortunately I

Has anyone marked up the schematic showing?rec and transmit paths via color. I recall seeing a bitx one last year 73 art N2AJO

Thanks fellows! I have performed the subject install and everything seems to work just fine. Cheers and 73 Walt VE7CWS

I have a late uBITX V3 (socketed) that I received 4 weeks ago & a Sunil Case for sale.? $150 for the pair shipped. The uBITX comes with the Click & AGC Kees kit.? Both are brand new & unmolested.

Try to see the link below and related previous history on that subject. you would get what you needed. /g/BITX20/message/50619?p=,,,20,0,0,0::Created,,raduino+bitx40,20,2,0,8041748

Hi, Any suggestions or ready code to make bit 40 VFO to encoder please ... Pradeep vu3edg

Thanks for advice and links (i already looked at this ch340 datasheet but it's very short and incomplete -no data about 3v3 output voltage interval) I've got something : only 36ohms between gnd and

Glen, The filter relays come in and out when PTT is pressed. Saves a bit of current if you are using on battery. I just cut a track and wired the filter relays to operate during rx and stay there. If

I had similar problem some time ago. No Tx.? I could hear K1 pulling in but in actual fact it wasn't making contact. I replaced it with a different brand of relay and no problems since. But it does

Willy, Long time. Guess who I just Worked! W1LY 2A RI on 20m cw as K8GC my clubs call. Nice to hear ya on the band's. 73 Enjoy FD David N8DAH ________________________________ Sent: Tuesday, November

It could also be possible that the transistor might be short, permanently operating the said relay. Regards MVS Sarma jgaffke@...> wrote:

If K1 welded up inside such that there was no path from pin 12 to pin 14 when the coil was not energized, then the receiver would not get RF from the antenna and be deaf. K3 does most of the antenna

Check the PTH as I mentioned..

Joel, If the TX track is burnt there it is likely that a plated through hole (PTH) has also burnt. Check along the burnt line from top to bottom connections. Check the RX/TX supply voltages

The receiver would not work until I changed the relay. I was wondering about that myself, why would the absence of TX voltage cause the receiver not to work unless a RX voltage was missing also. I

Cool! It does pay to just dive in and try.? Sometimes. I am curious though, what was wrong with the receiver? Perhaps trouble around C50? Jerry

Sounds like a defective Nano.? But could still be a shorted Nano IO pin.? Might check all of those IO pins with an ohmmeter to ground, +3.3v, and +5.5v with power off, and look again (I know you