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I would like to see that as well. 73’s WERNER G VAVKEN, WB6RAW wernervavken@... Cell: 408-375-6165 New Address: 39140 Gray Squirrel Road Temecula, CA 92592

I guess what he means is that when he keys the PTT, he has some rest-carrier (even when no mic is installed, so without modulating). 73 Allard PE1NWL

You have carrier? Did you add the CW mod? (10K resistor) Vince. -- Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/ http://www.metalworkingfun.com

Just finished building out a new BITX40 board. Works, but there is a LOT of carrier when keyed (no mic installed). I take it from previous posts that the diodes and null pot (R105) were removed. Dont

Is there a drawing someplace that shows component placement on the board? Trying to find the components on the board from the schematic is giving me a headache! KJ7UM, Grayson

arv, the original intend was to get a 'toy' FM broadcast transmitter going to provide simultaneous translations for an international conference of organic farmers. the crystal swing wasn't enough to

Farhan Phase modulation was popular with commercial VHF radios in the 1950's era. Maybe it works best with high impedance resonance? If that is the case then the modulated stage could be a JFET or

Arv, I could never get the indirect modulation to work. Perhaps you could play with it. - f

Hans & Farhan There is always reactance or phase modulation. Arv _._ wrote:

While you're waiting for the delivery of the 10T pot, you can already start with the rest of the modifications. Although highly recommended, the 10T pot is not strictly required - the software will

To be clear, Farhan is modulating the PLL's 25mhz reference, not using the output multisynth dividers. Perhaps the si5351 is designed to quickly follow changes in the reference oscillator, but do a

The etherkit and si5351bx routines leave the pll/vco where it's at, and only change the output multisynth fractional divider. The effect is instantaneous. And while I believe the waveform has no first

Hi Farhan Great project! I am surprised that it works, though! I thought the PLL settling time of the Si5351A would be too slow to allow NBFM by applying FM to the reference crystal. I once tried very

actually the ceramic disk of step 3 had escaped me ;-)

Hello Allard. Thank you for the clarification. I order the Vishay 100k immediately, and I start editing. Thanks again. 73 qro.

Yes that's correct, recalibration is required in this release. The VFO calibration method has changed. From v1.26 we use multiplicative correction (multiply by a ppm factor) rather than additive

Dear Jean-Jacques, Please note that the latest version is raduino_v1.26 Download it from https://github.com/amunters/bitx40 See the instructions at http://www.hfsigs.com/bitx40v3_wireup.html At step

Hello everybody. In order to start editing my Bitx40, I take stock of the components I miss. As I chose to modify the code of Raduino, with the version of Allard PE1NWL, I read and translated in

I wonder: has anyone here used DHL and NOT been charged for Customs? Might be a case for removal from hfsigs site. Is there an alternative available from/at that location? India Post is reliable, and

DHL works fine for shipping into the US. ?Other countries, it can nearly double the price of your Bitx40. I would have gladly paid $10 to avoid the 2 month grand tour of the USPS that my package