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The noise floor for the current V12 radio is better than -100 db as measured without the driver chip… My V11 with the buffer chip is nominally -78 db. That is ok for a test platform (toy level) but

Have you got a block diagram of this/ signal flows. Its something to contemplate vs. a FPGA and a Teensy. I’m formulating my next steps and want to get the next step absolutely perfect. Dr. William

May be a bad cable or on the wrong cable (remember… there is WINE, WIRE1, and WIRE2…. Three channels for the I2C comms so you gotta be on the right cable. See the development document on the

Thanks Oliver. I'll redo the tests next week. dave [email protected]> wrote:

The frequency calibration of my HackRF One is a little bit off, but here's what the audio sounds like from my radio (see attached WAV file). I haven't done anything to try to improve the mic.

If I connect a broadband power meter to the output of my radio I measure the following: State Power [dBm] Calculated RMS Voltage [V] Measurement configuration PTT not pressed -47 9.99E-04 No

Just a reminder that I will ALWAYS send out an invoice for boards and kits you order from me. Wait for the invoice. NEVER send me money without an invoice because it messes up my accounting system and

The only think that has changed on this list is the RF board… and that change was just to remove the divider circuit for the low-frequency operation that can now be done in software. The previous

I have four of the PA kits built here and I get a gain fluctuation of +0.2/-0.8 from 1-54 Mhz inclusive after a little tuning of the capacitor across the T3 primary. You might check to make sure you

Thanks, Todd...it's appreciated! Jack, W8TEE

Thank you, Jack and Al, for this labor of love! This has been a monumental contribution to Amateur Radio! 73 de Todd W2TEF

I am getting about 50mv noise out of the 20W amp in SSB with PTT engaged; no mic plugged in.? I'm running version 66.9 and am all calibrated.? Additionally, when PTT is engaged there is a burst of

Our booth at Hamvention is inside this year… 4111 in building 4. You can buy the lasted and greatest T41 boards and kits along with everything else I sell there. Plus we will be advertising the

All: Al and I have just updated the 3rdedition T41 book. We moved the calibration info from Appendix C toits own chapter (20). The expanded instructions and new software makeT41 calibration much

That would be me. Ill be home late tonight. Tell me what you are looking for exactly. Dr. William J. Schmidt - K9HZ J68HZ 8P6HK ZF2HZ PJ4/K9HZ VP5/K9HZ PJ2/K9HZ Owner - Operator Big Signal Ranch –

I am interested in purchasing the latest V12 blank pc boards for the T41-EP SDT.? Can anyone point me in the right direction to purchase these? Thanks

On Wed, Apr 2, 2025 at 07:48 AM, K9HZ wrote: Dr. Bill Playing with compensation caps around 180-220 flattens out from 3-30Mhz I can't seem to get much gain past 35-40Mhz Still playing not that

That was an instant fix! Thanks Rick. Roger G8JWT

Roger. Try a 180 deg flip of the 3 pin connector going from the audio top hat to the teensy 3 pin connector. Worked on V11 should also work on V12. No guarantees but easy to try. Rick, KN4AIE Sent:

I'm in the middle of doing the TX calibration using 66.9. On receive the radio works with the indicated sideband just fine, but when I switch to transmit the sideband is reversed. In other words when