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I suspect you could spray a cheap clear coating over the top with no degradation of the graphene coating to solve the transfer problem. 20 Ohms is very low for a paint-on coating. The silver coating

I have checked adhesion to PLA+ with Rustins and it adheres very well. I was very surprised by the conductivity which was around 20 Ohms for 35mm x 35mm surface area. I would add that the graphene

Yep, its whether or not frequencies > 10MHz emanate from it ?, I like the idea of the Double sided PCB boards…. The silver plated copper paint is more reasonably priced, and as I suspect everyone

? Sent: 08 February 2025 15:46 To: [email protected] Subject: Re: [AmateurRadioBuilders] Conductive Paint I’m sure we should care about the EMI from the display too. Tell you what…

My understanding is that generally - measures that decrease emitted EMI will also decrease received EMI. - Jerry, KF6VB

842AR is unaffordium. I think with a little help, I can design a nice little 5-sided box for the back made out of PCB for about $1. Both 5” and 7” displays. Should not be hard. I’ll try one

I’m sure we should care about the EMI from the display too. Tell you what… You work on the EMR and I’ll finish getting the data line noise from propagating back into the radio… Dr. William J.

Thanks Bill, so its Electromagnetic Radiation (EMR) IN that we should be concerned about? And in particular the range below that effects the Serial Peripheral Interface (SPI) from the Teensy to the

I’ll answer #2… the SPI can run at speeds up to 10 MHz… so anything in the 0.5-10 MHz region is concerning. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ

Both Conductive Paints look interesting. Two questions, if anyone has the energy to answer ? 1. John, have you used the Rustins paint successfully on your 3D Printed facias and if so did you use

Another Friday share… The new Display Driver board. This is the 3.3V ONLY board. It’s the cheaper of the two options. Use it of you don’t (and won’t) use 5V to power your display (if you will

Just some Friday sharing… Here is a finished dual encoder board with 3D Printed knobs (all out on the GITHUB). Replaced TWO encoders. One ribbon cable from the encoder board to the Fron Panel

What model number did you order Glenn. I did see a picture somewhere like yours too though. Regards Phil VK2KKZ

Yes. Use ULN280x parts... I use them for everything where I need to drive stuff... Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch

Hello, This has very little to do with the T41... I have this homebrew linear. It interfaces with my T41 quite nicely. Just like the T41, it has a Teensy 4.1 inside. Bands are chosen using Yaesu "BCD"

All interesting stuff… I see Prusa are marketing a PETG Magnetite https://blog.prusa3d.com/prusament-pp-carbon-fiber-and-petg-magnetite_107086/ which may have decent electromagnetic shielding. Not

This one I’ve used for building guitars… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

Exactly. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner – Operator Villa Grand Piton – J68HZ

No. data line voltages at 3.3 and VSS to the display requlator of 5V... Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC

Check this out, they are a trusted very well established comapany and the tech sheet makes interesting reading. Not sure about supply in the States, over here MG Chemical is very expensive.