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...When tuning. The tuning of the T41 ( V12, I2C front panel, I2C encoders ) is unpleasant. As you tune around, you get tiny blips of sound, interspersed with long display updates. You basically

The latest RF boards have holes in the back, behind the PE4302 chips for easier soldering the back pad. That said, ill look into having RF boards made with the PE4302’s and the si5351 pre placed. I

Thanks Greg. I will do the bias adjustment and then remove the resistor. 73 Rocco Sent: Saturday, February 1, 2025 3:46 AM To: [email protected] Subject: Re:

Looks good, Bill! Russ

*** Yeah, I think I had to install two or three before it finally worked. Those chips - and the si5351a - really beg for pick-n-place. I think it worked after... ...I got some low temperature solder

Thanks Jerry. I now have 3 boards built with the attenuator and the spectrum doesn't move up and down on any of them. I'll try monitoring right at the attenuator with a sig gen input. It is a

Wont matter what side of the board you solder it/ plug it into… just put the connectors on the opposite side of the board and keep the board faced the same way… meaning the chip faces the BACK

For those who have not populated board yet could there be an additional version that soldered to back side of board? Would make sense for 7" display Tim

Hi Rocco, the jumper is used only for setting the bias of the IRF510 transistors. It forces the bias voltage generator circuitry to ON.? So it is only used temporarily, in the preliminary tune-up of

I put together a mock-up of the display driver. The board will look like this (that is the real ISO 7241M on the board.the board is from a previous attempt): I envision it plugging into the display

Many thanks for the comments , here and separately.? That is most helpful for me. Additional note:? I have posted stuff about the RF design, including the three plug-in networks.? It is about

When I change the attenuator, I can see it clearly across the entire spectrum display. Everything just moves down. - Jerry, KF6VB

Thanks Oliver. I’ll try this dave

Hi Greg, I have a question regarding the JP1 pads between U2 and C24 on the V11 PA board. I have a zero ohm resister there now but not sure why. According to the schematic it looks like it should be a

Here's one way to test it. Load the latest code onto the Teensy. It has an option under the RF set menu to change the input attenuation. Then, put a 10 MHz (or whatever) signal into the RF_in SMA

" not much support from the Arduino crowd." I'm sorry to hear that, but not surprised. I looked at it two or three years ago when I wanted eight fairly high speed counters connected to a

You could use pointers because the indices are no different that an index except increment by one moves the byte pointer by sizeof(measure) bytes. Indeed the expression: ??????? int

Interesting project.? I have a different FPGA board waiting for my attention. I recently spent about a month working with an STM32H747XI development board (

*** HDMI? Now that *is* interesting. Is it connected to the FPGA? Is there IP available to drive it? - Jerry, KF6VB

This board has 1) an arduino processor and 2) a Cyclone 10 FPGA on the same board. It supports a variety of I/o and HDMI display interface. It sounds like a lot of cool stuff. Now, I would never use