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hi Paul, this Atu will be a bit like ATU-10. And power ist delivered through the programmer if you connect all 5 wires. You have to set the check at the GUI of PICkit like shown on the picture and

does the pcb get powered from the pickit3 then or does it need power to the pcb as well as the connection to the programer?,hope that makes sense?,cheers+ 73 m3vuv.

Thanks is that not the same as the qrp version tho?.73.

hi Paul, if you would like to use your ATU-100 as a ATU-50 (I name it so) you must change the windings of the coupler to 5 windings. After this you have to change EEPROM-cell 31 to "05" and cell 05 to

hi Paul, you can read the hex from the PIC. Nothing will happen. For connecting it, look at my post #1994 ( /g/ATU100/message/1994 ) cheers Immo, DL5KB

Hi all this atu-100 kit arrived today,it has all the smd bits pre soldered,i want to know if its ok to try and read or write too the pic without all the caps and torroids etc fitted,ie just the power

Hi all,i have a new at-100 kit,i want to use it with a prc 320 clansman mil radio,it outputs about 3 watts in the tune position and 3 watts low power+ 30watts high power,what mods can i do to the

hi all you YLs,? XYLs and OMs, I see a great problem opposed to all of you, who didn't use any micro-chips in the past.?I myself, had this issues too, but solved them.I updated as well ready built

/g/ATU100/message/115

is there a guide for programing the atu-100 using the pickit3 ,as it looks complicated!,cheers m3vuv.

Try with not connected board. Is there 5 Volts ? Mine holds the board, not tuning of course. Only rested board.

Hi David, I did try that but got a message from MPLAB IPE that the circuit was drawing too much current, although I did not measure the draw. I read elsewhere about programming at a lower voltage so

Hi, Matt Is your pickit 3.5 can work properly as a voltage source ? Use it as a 5V source for supply the board.

Hi all, I noticed that when my PicKit 3.5 is connected to my ATU100 (EXT, PIC 1938), the 78L05 on my board gets warm to the touch - much warmer than when the device is in it's normal operation mode. I

Thanks all I will look into using the EXT signal to trigger a protection circuit

If running qrp, you could use a 50 ohm bridge with an LED as a tuning indicator. QRP Guys sell them, but they are pretty easy to make... https://www.qsl.net/va3rr/sw30/tuner.bmp

I am a little confused on how these 50 ohm tuning circuits work. Is there a schematic available? -- Colin - K6JTH http://tangokeys.com

Hi. No, it could burn the output. That is the reason to use a simple linear output stage in some modified uSDX. But you can resolve this problem installing an additional relay which will connect TRX

Hi OMs i just acquired an “ATU-15” from a Chinese supplier on AliExpress and it seems to be working well with the QRP Labs QCX-mini I run into stealth antennas. However, I note some comments on

Hi, Michael That is not a ferrite core, that is powdered iron core . They should to have high Q factor and minimum heating level unlike ferrite cores.