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Enclose the board in a metal box or make sure you have a balanced antenna.

Yes, doing digital writes to update the si5351 for FM modulation was mentioned in that old thread: /g/BITX20/topic/6256856#34064 But updating fast enough to get good audio would be a

Hello, Finally the problem with transmit fixed. I have replace Q12 with a new and transmitting on ssb working perfect.

Hello, i'm using a ver. 4 Ubitx with 2.8 " Nextion display, using in CW there is a strange problem, something the radio it's "freezing" during trasmission and i can't send no more CW and also i can

Justin I made the same choice for through hole. I built the earlier Barb variant with plug in band boards using a Si5351 module board. -- 73 Bob? KD8CGH

In terms of? ?code for the Si570 I? note this contribution has been done so the? Hardware from SDR kits? (UK) could potentially be made open source. There are subtle diffs between the? Si 571

Geez Jerry et al you are all a bunch of very useful an busy bees. What I have found in the meantime is that the Si571 has or had a VC pin. now? Sdr radio kits sells a full ham osc which is based on

Jerry at least you did not try to take yerself out as I did once at about 14 when I decided to see what would happen if I put a 90v mini neon across the HV terminals of a motor mower and gave the

A neater way would be to read the modulating audio from an adc pin and program it to update the frequency of the si5351 very quickly. I believe usdx does that ti generate FM.

Jerry - I ordered my last one on 3/28, it shipped on 4/3, and I received it on 4/7.? Won't be able to play with it until September, though... :-( 73, Justin B. KI5GKD

My embarrassment would be the relay-based computer science fair project that I tried to design in 6th grade.? It did work to some extent until the actual fair.? By then the relays were intermittent

A man after my own heart! Someday I may have to embarrass myself by describing attempts at building a spark gap transmitter while in early primary school. Those encyclopedia entries were just not

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Jerry checkout Communication Concept’s website they sell heatsinks and a copper spreader. Although the spreader may be larger than you need it can be cutdown to a usable size. You might get two

How does it work with KD8CEC firmware? Are the formerly known problems solved like : - CW, the beginning of the first character being eaten ; - harmonics level, are they below 43dB ; - integration

Once upon a time... I did ( well, tried to do ) 2M FM with the following setup: * A Harvey Wells TBS-50D transmitter driven by * A Heathkit VF-1 VFO with * A paper megaphone taped to it. I figured the

Tim, There's a bunch of hits for a search of "NBFM -f" in the forum. This is probably the one you are thinking of: /g/BITX20/topic/6256856#34020 where Farhan was modulating the 25mhz

Jerry, KF6VB It was used for years on the *Bitx* transceivers, but adds opportunities for distortion, a not quite suppressed carrier, opposite sideband leakage, spurs due to mixer products. In short,

Ages? back Ashan? or Ashar published a whimisical schematic where he used on of the Si labs offerings to potentially become an FM VHF as in NBFM generator. Does anyone recall how this was done and

Name here is Jerry, KE7ER. A ham since the early 1970's. A pleasure, Jerry! *** Yes, that was the primary driver. I *love* open source software and hardware. *** I wonder if the old "audio oscillator