Hello Gary, Here the data sheet NJM2073.pdf (digikey.com) For the original mounting see my schematic With the diode and capacitor C30 you can "simulate" an AGC. I have for my test eliminated the diode

#ubitx-help

Hello Chris Thanks for your reply, yes at the time I write this letter, I also found, that the big elco capacitor Vcc filter is mandatory. I also experiment that one 1000uF is needed. My AF amp is LM3

#ubitx-help #ubitx #homebrew #v5

All, Two remarks: a) My uBITX v4, is transmitting little power at 40m in FT8, approximately 0.3W; b) I noticed that it does not indicate the transmission frequency, but it indicates the reception freq

#ubitx #ubitx-help #ft8

Brian, Evan has explained the slider function if you have a nextion display. Using the memory manager you can also do the same thing. There is a selection for the 1st IF (45mhz) calibration. Evan show

#v4 #ubitx-help #audiocircuit

Looks like Curt added 330pf across C81 and got good results: https://groups.io/g/BITX20/message/84646 https://groups.io/g/BITX20/topic/70906819#80608 I'm very curious what TP1 looks like after this fi

#ubitxv6 #ubitx-help #tx

Congraturation -- 73's PY2PVB Em qua., 13 de jan. de 2021 às 11:39, Gary.ingle via groups.io <Gary.ingle@...> escreveu:

#ubitx #ubitx-help #v4

Frank HEY - That's the one I've ordered so it looks like I made a good choice JOHN Sent from Samsung Mobile on O2 Get Outlook for Android

#ubitx6-help #ubitx-help

If using the mic input to do tune-up keying, keep in mind that is is not necessary to go full volume. 20-30% of full volume should be enough to at least give enough RF out to do an initial and probabl

#ubitx-help #ubitxv6-help

okayJohn, i had the same problems. Mic wasn't working, and the freq was out totaly wrong. Get many tips from guys who are a lot better with elektronics then me. But, after calibrate serveral times....

#ubitx-help #ubitxv6-help

Yes. Could be anywhere in the antenna system with a DC path to the rig.

#ubitx-help #tx #ubitxv6

Thomas, I am not sure that the impact would have translated to the circuit board if it was in the case with the top on. The board is mounted on the bottom of the case. It could have (maybe) caused an

#ubitx #v6 #ubitxv6 #ubitx-help

Hi George, I would suggest looking at the S-meter while removing power to the PAM8610 amplifier module. I've also been playing with using a Class D audio amplifier in my V.4 uBitX, but so far I've not

#ubitx-help #v5 #bfo #filters #noise

Lou It's good to know that it is being used. As I indicated, my main concern is that some areas are not 100% accurate and up-to-date. M

#ubitx #ubitx-help

They are to add another filter optimized for CW. The idea that I have seen was to use another crystal filter with a different frequency and narrow passband. You would then change the BFO to put the si

#ubitxv6 #ubitx-help

Litle measuring on a selfmade dummyload, 10mtr 18.4 volt, 15 mtr 22.0 volt, 17mtr 23 volt, 20mtr 23 volt, 30mtr 29volt, 40mtr 32volt, 80mtr 32.4 volt..... So is good i think... Regards Rene Netherland

#ubitxv6 #v6 #ubitx-help #arduino #nano

Thank you Vic! I did not know that was there. I will need to give it a try. 73 Evan AC9TU

#ubitx-help #digital

I might try to use the existing Keyer plug to see if this would work, but the RigPi is not CAT control setup for uBitX so can't CAT connect naticely to RigPi will try and emulate the Yaesu 817 CAT con

#digital #v5 #ubitx-help #cat

Most likely ..yes

#ubitx-help

Hi Reed, Thanks for your answer. I will definitely evaluate that. Have a nice day.

#v6 #ubitxv6 #ubitx-help

Unlikely that it was static damage. The is a DC path from Antenna to Ground via L1/2/3/4 and T2. Raj

#v3 #ubitx #ubitx-help