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Hi Tony, I can't understand your comment re the wire to supply the voltage to the programmer. All you need are the five connections from the PICkit 3 to the five points (J2) on the ATU-10 PCB. You

Dear Robbie, Thank you for the comments! My previous attempts were made WITHOUT the wire that would supply the voltage from the programmer, so the chip was powered with 3,3 volts throughout. (I've

Tony, connections to the ATU-10 PCB were 1 to 1, 2 to 2, 3 to 3, 4 to 4 and 5 to 5. There's a 6 on the PICkit units but it isn't used here. Pin 1 on the ATU-10 PCB is marked with a 1 and is also a

Hello! Forgot to ask in the first message: * is it normal that I have to manually search for the chip type? It is only recognised by its' ID if I choose the Device Family -> Midrange -> 1,8v MinII

Hello! If I need to rely on MPLAB, which version to use? The recent is MPLAB X IDE v6.00 (

Dear Robbie, I'm about to add a wire from the programmer's pad #2 to VDD pin of the PIC16F1454 chip, may be - temporarily - removing the LDO stab (to avoid possible damage by reverse voltage). I

Tony, I used MPLAB with the PICkit 3, but you have to make sure it's set for 3V3 in the Advanced menu - the app's default is 5V so it would always fail the programming sequence. Robbie M1ROK

Hello! My PICkit-2 has just arrived, neither the PICkit 2 v2.61.00 ( https://ww1.microchip.com/downloads/en/DeviceDoc/PICkit%202%20v2.61.00%20Setup%20dotNET%20A.zip ) nor the PICkit 3 (

This is known problem of this tuner. You have to add decoupling caps and ferrite beads to the buttons wires

Definitely worth replacing the caps....I had several of mine burn up during normal operation at 100w Steve G4EDG

Thank you both for this additional info. Mine does have yellow relays. I'll cautiously test running TX through it when powered off, and see how the radio responds (I'm using an antenna that is

Yes, if the relay is non-latched type (usually yellow in colour), it will be reset to off stage when no power is applied. Mine version is ATU-10, it uses latched type (white in colour). It keeps in

The ATU-100 has non-latching relays. It should reset to a pass through configuration when off but I haven’t tested mine. The bypass switch is momentary contact. The display shows when you are

I readily admit that I'm very much an amateur when it comes to schematics, so forgive me one more question: I notice that if I listen to a band with the ATU-100 in-line but powered off, the RX seems

Excellent, thank you! I'll get in there and see if I can find that pad. In the schematic, is that a toggle switch? I can't find the schematic symbol online... is it saying that I'd switch that pad to

Thank you all for your replies, that's quite easy when you have the solution given to you! 73, Yannig F4IUJ

Hi Joe, I have the button but when I was making it I just soldered a wire to the pad marked RB2. It is close to the processor chip on the side of the board close to the controls. I am pretty sure I

Greetings all. I have a question, about an ATU-100 (pre-built Chinese version... I had to solder on new SO-239s, the ones it came with were horrible): This version of the hardware only has one button

i think it is - press all three buttons together.

There are 256 bytes of EEPROM. You would need to have a frequency counter and make a lookup table. It’s not much room. Colin K6JTH