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Without a thorough analysis and a lot of spare time, best bet might be to give Lady Ada $4 for an i2c level converter. ? ??https://www.adafruit.com/product/757 Or read the NXP/Philips app notes

I have for sale my Nue-PSK modem I used with my Bitx40. Cable is setup with dc block cap for use with stock stereo jacks - tip mic - ring ptt - sleeve gnd Modem has all the add ons as well as the CW

Here is a link to one that can be had on Amazon for about $6 + shipping. The really important piece is the controller HD44780. You might be able to find one cheaper –just make sure it has the same

OK. But what to do IF I have other (additional) I2C device working at 5V? MAc

On Thu, Dec 28, 2017 at 11:34 am, Peter Parker wrote: If anyone is interested in going the homebrew AM route, I built a 160m AM superhet receiver using the exact same stage and parts line-up Peter

Two days ago I wrote a CAT communication program for uBITX.? It was tested through Ham Radio Deluxe and I posted that information through this group. Perhaps the CAT communication test seems to have

You beat me to this answer. A relatively high and nonlinear (vs frequency) gate capacitance is characteristic of these big die motor control Mosfets. If you don't like that, find a real RF

?no need at all to try 1.24 if you have succeeded in 1.27.3 --- congrats!!! Ragchewing is fun, but voice stranger contacts just never turned my crank. Guess I'm slightly introvert. So i like

Ummm....maybe I confused the issue. The gate can be at RF ground, and at +(adjustable) bias voltage, while the souce is at input RF and grounded DC (through a coil?) Or the gate can be at both dc

Hello Gordon, I will look into where I can find firmware V1.24 and give that a try. I know the Bitx40 is a SSB transceiver, I just find it easy to operate CW and have more QSO's than on SSB. Guess,

Very Nice David! Wish, I had some of your smarts! 73, Jeff - K9JP -- Not all of me will die - - - The good I do will live forever. <><

Arv: As Gordon points out, the grounded gate configuration applies to the exciter, not to the final...a power MOSFET must have a gate voltage. I wonder, since the gate capacitance is ca 180pF in the

Thank You Al - VE3RRD, I had to update my Arduino IDE on my netbook, I then followed your instructions at the link provided. https://www.dropbox.com/s/s327me4umdckcpc/Raduino_SW_install.pdf?dl=0 I

The ZM-2 should work well for a uBitx at 12v. But if you feed the IRF510's 24v, you can get way more than 10W.

?Another person asked about SSB --- yes, grounded grid (and gate) should be usable for SSB. Nothing changes about the linearity (or lack of) in the device --- just the input impedance presented to

?Jeff -- If you can't seem to get it figured out, i or probably several others could walk you through it over the phone. If you can get BLINK to work, then you seem to know how to compile and

?In grounded grid (or gate) configuration, I believe all you may expect is basically VOLTAGE GAIN. if yoiu have a 50 ohm input impedance and you are feeding the cathode (or source) then your driving

John AD5YE I understand that some people take "Grounded Grid" and "Grounded Gate" literally, but the Grid or gate could be at ground for RF but not for DC bias. That is common in several Ground

From what I have read the ubitx is about 10w. I could be wrong. ?As for the zm-2 I have used it at 10w-12w all day with no issues the swr bridge shouldn't be used on more than 5w or so. ?You can

A "grounded gate" of what, Marco? Not of the IRF510 or any other MOSFET. The current through the device is determined by the gate voltage. with a gate at 0v, the current through the device is