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Also got to file away a little more the the double sided PCB.? Nice easy job. 73s? G4RVH

Hi David.? Yes very valid point so will see what happens to the display and any problems then I know it's the frequency getting dragged down. Cleaned the board and you can clearly see the 2? x? 64k

Hi David, Just for information, I think the I2C interface for the OLED operates at 100kHz. I don’t know if the plan is to pass the display signals via the feedthrough filters. If they have a high

This PCB Box slides into an Aluminium extrusion box with plenty of room. 73s? G4RVH

Hello David.? I've another back plate double sided copper to replace the one that's on for two x? BNC Sockets input and output. Those Double Pi Network Feedthu's as you will know are of the highest

Hello David. Thanks for the info as very useful. I've been busy rewinding the transformer this afternoon and also cut with a very useful cutting saw a hole in the PCB box I made a while ago so that I

Hi David, I hope your?testing goes well. With a 50 ? source impedance and a load of 75 ?, I would expect the VSWR to be 1.5:1. 73, Dave

Hello David and Immo All clear and understood thanks. I might get round to winding the transformer today.? Just nice to know that the PIC processor is all working and all of the Mosfets are switching

Hi David, Your marked up picture is still not quite right. Where you have shown "CELL 10", it should read "CELL 0A" (refer to the table above). "CELL 10" is the first address on the second row. All

Hi David . Many thanks for sending over the explanation and finally the Penny has dropped and fully understand now.? Thank God for that.? 73s G4RVH

Hi David, I have shown two tables below, one shows decimal numbering and the other hexadecimal. The address naming convention used in the manual for the ATU100 manual is "Cell" number. Perhaps if it

look here...

Hi David. To be perfectly honest with you I am totally and utterly confused with the CELLS now from ZERO to 31.? Please show how you are counting the CELLS from ZERO to say 31 to clear up this

Hi David, Immo has covered your question with respect to Cell 31. I have also highlighted Cells 7 and 8 in yellow which are the vertical and horizontal adjustments for the display. For my OLED, I had

As 10 at cell 31 is default, you must change nothing... 73, Immo

Hi David, That’s great news, well done. The supply current seems higher than I would expect. Components: Specified nominal coil resistance = 720 ? D3 diode forward voltage at 0.5 A = 0.9

Hi Immo. Could you draw a coloured circle round CELL 31 for me.? As far as I know I have marked CELL 1 in Purple. 73s G4RVH

You will see in the photo all of the tiny red LED's are all lit up. 73s? G4RVH

Hello Immo I've taken the Balun transformer off to rewind shortly.? Taken the old windings off because I used a tiny blob of super glue so had to cut the windings out altogether. So this project

Hello again to both David G8PTN and Immo. I have very good news for both of you. Firstly the 68k resistors WERE 68K but 2 x parallel to give 34k on both 34k resistors so both reading exactly