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Rick Same here I did eliminate the extender and just used long pin female headers to get hat above heat sink. I have to play with reseating Teensy to get I2C to work properly. Once tweaked it seems

Didn't you say that you've already trial a second audio hat? Jack, W8TEE

I actually had to ditch the extension board. After several intermittent software issues I discovered that by pushing down on the teensy and restarting it would work normally for a while only to happen

Been thru that once Jerry need to reflow again, it is definitely one of the Teensy pins. Update, I was able to get 64 beta to load and recognize all the I2C addresses including Audio Hat, and auto rx

I would carefully check all the soldering at the Teensy and the audio hat and the offset board - I found a few Teensy pins that I hadn't actually soldered. - Jerry

Ok… Good to know. I’m winding coils too! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

Yes I hold button until it goes into slow flash mode as per Teensy site suggestion. Tnx for help, I am busy winding coils so it is not an issue at moment. RX is fine without audio hat installed. Tried

On thing Tim… Have you been resetting the flash memory every time you load a program? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal

Very strange Tim… but we will help you figure it out! Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois

I2C scanner found all the addresses However program(ver50.2)will not run with audio hat installed :( Tim

And…. If it works only sometimes, there is a bad connection somewhere. Probably either a solder connection of one of the IDC cables. Pictures are worth 1,000 words! Dr. William J. Schmidt - K9HZ

Use this test software: T41/T41_V012_Files/T41_V012_Software/T41_V12_Software_For_Board_Testing/V12_Main_Board_Test/i2cscan at main · DRWJSCHMIDT/T41

You can actually do either, but it will be far easier to stack them one on top of the next. That's why it's written that way in the Assembly manual. BUT if you can get them side-by-side. that works

Dr. Bill Which I2C scanner SW do you use? Unrelated to audio hat, sometimes when I boot up it does not see LPF or BPF address All the others are seen. after some fiddling it will work fine. I check

I was under the impression that if there is enough room, you are better to stack them side by side? (Something about electrickery(sic) flowing the same length through the "stacked" components, albeit

Thanks

I used those listed in the BOM: https://github.com/DRWJSCHMIDT/T41/blob/main/T41_V012_Files/T41_V012_BOMs/T41_BPF_Board_BOM_V12.6_02-16-25.pdf

Hi Oliver, What capacitor values did you use to go with these inductor values? Did you use D.Solt's values or Bill's John, G0SDF

You have a pretty good method for winding the coils and I don’t want to overlook that… I sometimes forget I am an insider and don’t always think all the angles… too close to the trees. Dr.

I was just offering to help, if you wanted me to. But, you're right, it would be better for someone with a solid electronics background to do it.