开云体育

Bill, My system is working and without freeze-ups, but I will try out your board. Al

I believe that this is the "correct" solution.

I have both M and C parts, but it doesn’t seem to make a difference. If there is a software fix for this, I really wonder why someone hasn’t done it. There are posts all over the PRJC site about

I hope you got the M version.? The C version is only specified to 25 MHz. Also, remember there is a potential software solution to boost the Teensy drivers. That will require drilling into the device

I use these ferrite sleeves for ribbon cables. Seems to work FB. Tim W4YN

Another wacky, but successful solution is to hand wire the display with the SPI signals separated by the ground/power lines.? I used the following order successfully on an 8.5" cable: 1. SCLK (gray)

Well, the ISO7241 is a specially designed SPI buss buffer/ isolator/ driver chip…, it plugs into the T41 display socket on the main board (close to the Teensy) and the display cable plugs into it.

Hi Bill- Is your board placed at the display end?? It seems like it is more of a "buffer board" rather than a driver board, if so. I'm trying to visualize why it works. -- 73 Greg KF5N

The driver board seems to extend that to 6 feet (I can only measure the effect on a scope, not with the display)… someone else will give me the real story. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK

I've continued my T41 v12 display experiments.? A 9mm clamp-on ferrite worked with my 5.5" ribbon cable. It didn't work with the 11" or 15" cables I had on hand to test.? So somewhere between 6" and

I have a 5V display.

Ok expect it. Is you display set up for 5V or for 3V? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois

Sure, I'll test one.? Thanks!

Ok I’ll send you one 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 – Operator Villa

My rig with 7" display is working ok for most part. (PA needs some tweaking) I have a 6" ribbon cable but it has ferrite sleeve. It was freezing up but that was several FW versions ago. I can try the

Would you like to test out one of these display drivers (FREE)…? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC

I have a v12 Main board where the 5-volt display works with a 3.5" cable but fails with a 5" cable.? I've done some experiments.? The display works if the ribbon cable wires are separated.? I've

Ok yep looking for someone that is using a short cable that can expand a bit to test this out. If all else fails, I’ll send one to Al, because I know he will be curious… Dr. William J. Schmidt -

That can work! 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 –

Wait a minute, Bill: my system at the present time does not freeze up, so that might not do you any good. Jack, W8TEE