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Hi David, Will there be a complete kit of parts with smd chip already soldered? Also, what is the maximum power for this ATU I ask because I have a Tentec Argosy which is 50W or 5W switchable I also

Hi Steve, Thanks for your reply. I know what you mean about the switches... the package options I ordered resulted in me receiving two Tune switches. Which was good, because one failed simply

Hi Glenn P- power line for relays, short only after check everything go good soldering. R - reset processor The connector looks good.

I'm guessing you may have damaged the auto and bypass switches while soldering. I did exactly that with my auto switch. I used magnet wire for the ground bus and overheated to burn off the insulation.

New to the group, hoping to get some advice to get my little tuner going. What I have is the typical Aliexpress kit, preloaded with 3.2.? I ordered the version that supplies SO-239 connectors and the

Thanks David Can you advise what the solder blob links marked as "P" and "R" are for? I think I found the correct USB "C" connectors also, on ebay:- PCB Connector Type-C 3.0 (USB-C)Female Socket

But e aware that many eBay cheap BNC connectors are 75 ohm, not 50 ohm types and many other eBay offers do not have the impedance specified.. Bill, VK7MX

That's correct, BAT54S protecting diodes.

All OK David. My build is progressing, a few more toroids to wind, but waiting for the main PIC and FET drives. Just wondering about the *two SOT-23 devices* near the TUNE button??? Is anything

David, at one time QRP'ers used RCA connectors. John VE7KKQ

Hi people The link on BNC connectors was added to BOM on Github https://a.aliexpress.com/_vbC5ip I never tried previuous connectors from Digikey, be carefull. The needed connectors should to have the

Hi, Scott Thank you. I don't have a time to make a schematic, this tuner is not the main project for me. If you could do that - please use Easy EDA CAD https://easyeda.com/page/download Unfortunatelly

Hi, Glenn Are you about pin 3 on the schematic ? You are right that is 4 pins connector, sorry for this missunderstanding. Actually pin 3 just goes to short to ground when simple 3-pin jack is using

David If you scroll down the listing a little, you will see that there is a drawing of the pads and also two ''schematics" of the part. Both show thats its a 4 pin device. Of course perhaps the vendor

First let me say that I think this is an awesome? project and thanks to?David Fainitski for creating it. I understand that this project was done by directly creating a board layout without first

Thanks for the response and the link. I suspected it might have something to do with that. wrote:

Howard - the tandem match is the reason for DC continuity. The single turn primaries are in shunt with the 10 turn secondaries, which are connected to ground. Here's a great link from Owen Duffy

I recently completed my ATU-100. During the pre first power check I noticed that there is continuity between the center conductor of the input and output pins and ground. It powered up ok but haven't

Glenn, where did you find any info about 4 pin connection by my link ? I can't find it.

Hi, Mike Don't forget to set the contrast up with potentiometer resistor in other way your display will not show a picture.