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Thanks - a good suggestion I will put my oscilloscope on the clock lines of both boards and then try the fequencies you suggest - will post soon to say how it goes. 73 Dave GM4NFI

Mark, just remember, for troubleshooting… all you need is the Main board, the RF board, and the display… you can take everything else out of the chain (eg RX antenna straight to the RF-in on the

I have used the Atlas LCR for years to sort SMD parts. You can get Tweezer probes off Amazon (I think) and adapt to any LCR meter. Tim W4YN

Hey yall, I've built my boards and have them all hooked up.? I've started with receiver checkout, and unlike my V11 which was amazing !, I have a lot of noise, specially on 40M.? I'm not in an ideal

I have one of these too… makes removing SMD parts a snap (mine is a different model). Soldering tweezers. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner -

Thanks Greg! I've been looking for something to measure SMD parts. dave, n3ds [email protected]> wrote:

Thanks! Just bought one. Looks like a reasonable tool. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois

I have the FNIRSI tweezers: https://www.amazon.com/dp/B0DBQ4SQGK Pretty good!? Nice to have on the bench during assembly to double-check things. -- 73 Greg KF5N

Sorry, missed your comment... from the usermanual in the Amazon link. They are what they are, but for a ball park figure, perfect. I'm tempted to makeup a lead so I can use the tweezers with my rather

The two boards have a different clock speed (84 vs 72MHz).? It appears the spi frequency for the board can't be set to the 36MHz as is being done at the bottom of Setup32_ILI9341_STM32F103.h. Try

I have been using STM32F103 BluePill boards for several years without any major issues and have them driving ILI9341 TFT displays OK. I decided to try/experiment ?the STM32F401 and have a bought a

Ok thanks. I see what went wrong… that section was copied straight out of the BPF manual and unfortunately not updated. I can fix that. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ

The assembly manual T41_RF_Board_Assembly_Manual_V12_042324.docx was confusing in the following paragraph which I understood to say, use address "100": Thanks for all you do on this project. I am

You are quite welcome Dave… For feedback, which documentation is lacking to help avoid a problem here? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner -

That was it!!!! Wrong address. Now all three boards work with varying receiver attenuation. Now I'm on to calibration. Thank you all for your help. dave, n3ds [email protected]> wrote:

Just so everyone knows. Repeating. A few months back, I separated the T41 boards and kits… from the K9HZ-KI3P boards and kits… by placing them is separate GITHUB directories. I did that because a

The primary RF board (that is the Primary RX and TX) should be set to 0x27 which means that the three address lines A0, A1, and A2 should be set to “111” or no shorted jumpers (J15, J16, J17). Dr.

ah yes. That mythical prototyping standard ... MIL TFD 4.1 "Make It Like The F***ing Drawing, For Once" !

I'm not in a position to try this, being more of a theoretical than a practical person (still not started on my T41) but musing, I wonder if one was to wind the wire loosely around a pencil or

Bill's right: you do not have the correct address for the MCP23017 chip. The I2C address is set by JP15, JP16 and JP17. The command "#define RF_MCP23017_ADDR" sets the address that the code looks for