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Bill, Set to 5v.? Sorry just saw your message. Hank -WZ3HMT

When I first built my Main Board, there was no audio. Bad solder joint(s). I put the board under a microscope and teased the pins of the DAC chip with an Xacto knife. If they moved, they weren't

I looked at pin 24 on Tweensy, Daudio-Out that goes to U5 audio processor. There is a signal there but it does not look any thing like a digital signal, I do see an occasional spike that coinsides

Hi Wade… the Assembly manual covers all of these topics… IF you need help with the input attenuator, just ask for the specific example (formulas are in the manual)… Dr. William J. Schmidt - K9HZ

Hi Dr Schmidt, and everyone here! I'm finally getting to start the build of your 20W PA semi-kit. I will eventually use it with my T41 build as I get there, but would like to experiment a little with

Huh… I’m gonna have to check this out… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois Owner –

Actually it doesn't look that bad.? A while ago I cobbled together a slimmed down face plate to fit on a smaller printer bed and just uploaded it to oshcut to see what I'd get.? The powder coat set

Figgered that because OSH Park for PCBs is insanely expensive… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton,

*** My guess is ...if you have to ask... I was looking at OSHpark board service. For the same deal as $2 from JLCPCB, their price was $80. Except only 3 boards instead of 5. - Jerry, KF6VB

Well. this is interesting: <https://www.oshcut.com/> Laser Cutting and Sheet Metal Services | OSH Cut Wonder what is would cost to make a case for the T41 ? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK

Perfect Hank, Thanks. What voltage is your display jumper set to on the Main board? Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch

Thanks for summarizing. 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

Bill, I have a working V12 single transceiver.? My initial cable of 12" worked when it was on my bench but when I mounted in the encloser it quit working.? Not sure if that is long enough for a test

Good stuff! Thanks [email protected]> wrote:

Well, that’s 4 hours of my life I won’t get back. ? Rohde & Schwarz hade doing an online seminar ref EMC DEMC 2025 , obviously to sell their equipment, but normally some gems hidden.

T41 V11 operates in full duplex during transmit calibration.? So perhaps predistortion can be applied.? That would be an interesting experiment.? But V12 will not work, unless the TX calibration

Could be that John Melton worked on some of that… Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ VP2EHZ Owner - Operator Big Signal Ranch – K9ZC Staunton, Illinois

The new attenuator/ 20W dummy load I made can be used as just a 40db tap on the RF line for feedback for something like this (besides the radio calibration). I don’t think it’s that difficult to

Jerry, The Thetis software for the Hermes Lite, ANAN and radioberry radios has adaptive predistortion and you can examine the source files to see how it works. Thise radios have the capability of

On 2025-02-10 11:34, K9HZ wrote: In any > case, he does tout using class-A final RF amplifiers in the transmit > stages of radios because they, by shear design, will generate less > IMD. *** NO