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Date
Re: AGC on Sunil's Nextion case info
Hi Joel, Try this, too... /g/BITX20/files/AGC%20BITX%20UBITX/AGC%20Details.pdf?fbclid=IwAR3gsSFpIW-WgVlFpl3Q9lQjie_gkdJpBMgKUGTwSM_vSECmRuJ3xRHH6cs
By Sam Tedesco · #69365 ·
Learning SSB circuitry from the BITX40 board
https://soldersmoke.blogspot.com/2019/05/kg7ssb-homebrew-ssb-in-tuscon-learning.html
By Bill Meara · #69364 ·
Re: AGC on Sunil's Nextion case info
I have a v3, but I'll get a pic for you with connecting points when I get home.
By Sam Tedesco · #69363 ·
Re: Raduino for Sale
With socket for the Nano, or permanent soldered-in type? Ted302.981.6479 On Fri, May 31, 2019 at 12:54, PeteWK8S via Groups.Io<pmeier@...> wrote: New and unused $32 Shipped Paypal or
By Ted · #69362 ·
AGC on Sunil's Nextion case info
I am struggling to figure out how to interface the AGC board that came with Sunil's uBitx/Nextion case to a V4 uBitx board. I have the S meter all hooked up and calibrated per the instructions that
By Joel Caulkins/N6ALT · #69361 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Right now, like most figures, those are the modeled values. We plan on doing our own field tests when we have the second version built. Jack, W8TEE
By Jack Purdum <jjpurdum@...> · #69360 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Hmmmm. I didn¡¯t see any math to explain the quoted efficiencies of 40 or 90%......??
By Gordon Gibby <ggibby@...> · #69359 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Well the good old standby is using a field strength meter around the compass at various distances from the antenna for transmit. I guess you can do the same thing with a point source on receive.
By MadRadioModder · #69358 ·
Re: Ubitx (2.0) - Screen too bright - cannot see when seeing straight
Replace 1 resistor. 470 ohms is a good choice. Saves a bit of current, makes the display last longer, less heat. Here's the link to how and where: http://www.nd6t.com/bitx/Backlight dimming I do this
By Don, ND6T · #69357 ·
Re: Nextion 5/Enhanced for KD8CEC 1.2?
Joe, Pretty much have the SA screen. Figured out the artifact issue when the slider is used. Going to make the slider a little larger since we have the room. Some more tidying up and then back to the
By Mark Hatch · #69356 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
If you have an alternative model, we'd be interested in knowing about it. We are in the process of finding out which tests make sense and which are really little more than intellectual smoke.
By Jack Purdum <jjpurdum@...> · #69355 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Yep¡­ that¡¯s true¡­ for ideal calculations. Sent: Friday, May 31, 2019 12:51 PM To: [email protected] Subject: Re: [BITX20] Preliminary results -- W8TEE/AC8GY Mag Loop Testing Not true. Our loop is
By MadRadioModder · #69354 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
NEC4 will tell you all of that without building a thing¡­ Sent: Friday, May 31, 2019 12:45 PM To: [email protected] Subject: Re: [BITX20] Preliminary results -- W8TEE/AC8GY Mag Loop Testing We are
By MadRadioModder · #69353 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Not true. Our loop is 40% efficient on 40M and 90% on 20M. See: Fw: [JackAl] W8TEE Mag Loop Testing | | | | Fw: [JackAl] W8TEE Mag Loop Testing | | | Jack, W8TEE
By Jack Purdum <jjpurdum@...> · #69352 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
We are also trying to assess other factors, too, such as a counterpoise and its affect on performance. We may find that these "other factors" play no significant role in the antenna's performance.
By Jack Purdum <jjpurdum@...> · #69351 ·
Re: Preliminary results -- W8TEE/AC8GY Mag Loop Testing
Loop efficiency is dependent on size versus frequency. There are many articles on-line that discuss this. https://www.robkalmeijer.nl/techniek/electronica/radiotechniek/hambladen/qst/1986/06/page33/
By Arv Evans · #69350 ·
Re: Ubitx (2.0) - Screen too bright - cannot see when seeing straight
In addition to the contrast control (Pin-3 on the LCD) you can add a resistor in series with power to the backlight diode. Resistor value can be determined by trying different values until it is right
By Arv Evans · #69349 ·
Raduino for Sale
New and unused $32 Shipped Paypal or Postal M.O. Pete WK8S
By PeteWK8S <pmeier@...> · #69348 ·
Re: Audio chip burn out.
Hi Graham NJM 2073?did the trick for me; the output is very good and very loud.
By Sajid Rahum · #69347 ·
Re: Any gotchas replacing the TDA2822 with an LM386? #ubitx #ubitx-help
I was able to use finally the NJM without issues; audio is really strong with the v2 model.
By Sajid Rahum · #69346 ·