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Is that close in spurs, or just harmonics that can be dealt with using LPF's?

i'd not like a pcb at this time. i am being a little obstinate here. i am still not happy with some spurs on the transmit side. a pcb will not allow changes into the circuit that maybe necessary to

Hi Ashhar Is the schematic available as a download somewhere, it would make it much easier to make the pcb. Best regards Allan, OZ1CXP Den 22/06/2017 kl. 21.07 skrev Ashhar Farhan:

it may happen yet. but it is still some time away. - f

I thought that the ubitx was going to be sold as a made radio like the bitx

That would be Great! Bill W6SDI

https://youtu.be/WFH9GdtPO3w ( https://youtu.be/WFH9GdtPO3w )

Hi to all. Since I have now a [borrowed] real bit40v3_smd + raduino I can test and tune some things... I have put together a test sketch based on the Allard's code version 1.15 (1.15 not 1.15.1) that

Yes John, you got that right! The transistor just bypasses the switch (as it's in parallel to the switch). So the result is the same whether you close the switch or whether you cause the transistor to

I don't know if you see the vid

Looks like it works! It has to be connected to an amplified speaker though i will figure out how to fit it to a normal rig speaker

We have to first characterize the crystal. that's measure their motional inductance and capacitance. i do this using the G3URR's method. it is a very simple two transistor oscillator. after that, i

Aashhar, which method are you using to select matching crystals? 73 de Armin, DJ2AG

"apart from a steady hand" - ah, there's the rub. I was licensed a short while before you, and eyes and hands no longer do what they did. ?But... your advice to practice, practice, practice is

hi ashhar i am following the topics on ubitx with interest it would be nice if hf sigs did the same as the bitx40 - perhaps more than $59 but other than that a pcb? and set of crystals would be

Farhan, i based my analysis on the simple low frequency model of the bipolar transistor as put forth by Hayward in EMRFD and the three relevant white papers. ?I have been working my way through that

Let me try to ask the question differently. Is it not true that what the BitX board?sees at the PTT connector is the same regardless of whether I press the PTT switch or cause the transistor to

The difference is just in the usage. In the intended usage, in order to return to SSB, the operator would press the PTT whilst the radio is in RX mode. But in your case you press the PTT while the

Thanks Allard! That is quite possible.?And it is my plan to do just as you suggested?(just need to find an hour or so to get to it! LOL!). But answer me this if you don't mind. How is pressing the

Yes that's correct, since v1.14 you cannot do CW without the TX-RX line Yes this is as designed:?(since v1.14,??see the revision record in?README.md): CW key down brings the radio?in CW mode