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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

7805 Input is direct battery=12.55V (if it’s going ?hot, IT me and IT HAS power to dissipate due to current x deltaV) 0,23A is a problem when : - it’s going to heat too ?Much ?the 7805 - at

Remi, What do you read on the input pin of the 7805? Still sounds "fishy" ??? 7805 does .23A OK?? Should be no problems if not hot? Yes climbing temp is a problem? Mike -- Mike Hagen, WA6ISP 10917

Mike (and others), the 7805 output is (only) 4.79V, with input at 12.55V (see picture) (Pb battery), I assume the low voltage is due to high current/power drain (0.23A = not far 2W), I don't think the

You must have low voltage into the 7805 or it is bad.? That seems to low? Sounds like it is dropping out because of low input voltage.? Should be about a minimum of 8V input, depending on the part?

Jerry (and others), my finger says that nano's processor is also heating (that sound that the problem is on the nano or raduino board) I looked at the board, no extra coper or solder which could make

Congratulations and good work! Marco - KG5PRT

I also found 3.5V on the 3V3 output of the Nano (that's in the range for FT232 or PL2303 : 3-3.6V, high but in the range -no datasheet for CH340)

Hi all, ?I want to thank you all who held my hand through this, I am now back up and running. The low power was because I had my power supply in current limiting mode, I now have full power out and