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Hello everyone, I'm in the process of scratch building the BitX40 PA for a DSB rig, but I don't really understand the driver stage/7805 regulator from the schematic. R144 in parallel with a short? I

Pavel, I looked over you Si5351 library. ?I like that it is kept simple and easy to understand. I think it could be a good starting point for a stripped down library specific to the Bitx40. It

And the full tree of the software page is: https://github.com/pavelmc/bitx40/tree/smeter_AGC Best 73 Carlos CX8ABF Sent: Thursday, June 22, 2017 8:44 PM To: [email protected] Subject: Re: [BITX20] Like

https://github.com/pavelmc/bitx40/blob/smeter_AGC/smeter_mod.png Sent: Thursday, June 22, 2017 5:01 PM To: [email protected] Subject: Re: [BITX20] Like to test a S-meter and soon an AGC/Tx-monitor for

Hi Ashhar. I assume you use the G3UUR test circuit shown in Experimental Methods in RF design or something similar. If so, when calculating the values of Cm and Lm, did you actually measure and

I have not seen the video, yet, but maybe it can be put before the volume control and then the lm386 will amplify the audio? Marco - KG5PRT

OK John, never mind, good to hear you got it all working now! 73 Allard PE1NWL

I was pressing the PTT in place of having the RX-TX transistor connected. But anyway, I just finished reconnecting the transistor and everything works as it should now!!! Don't know what I did wrong

Yes that's correct and as designed. So why is this an issue? Why would you want to press PTT and close the key at the same time? Sorry I don't understand. 73 Allard PE1NWL

Where is agc_software.png ?

check the contrast preset. does it make the display come back? - f francescawine@...> wrote:

My display is now just? bars. I lost? the computer? chip on bitx40. Where can i get another board? Francesca W7LTG NV Sent from Hotmail Email App for Android Thursday, 22 June 2017, 00:07PM -07:00

-- Sent from Hotmail Email App for Android Thursday, 22 June 2017, 00:07PM -07:00 from Ashhar Farhan farhanbox@... :

"Here is a screenshot of my simulation. i run it under ubuntu, hence the weird window style." Doesn't look weird to me... I use Ubuntu, too. :) -- Darren, W9ZIM

That's what I thought, so back to the original issue, with the whole TX-RX modification (i.e. the transistor) completely removed, when the key is closed and I press the PTT, it reverts to LSB TX mode,

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