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Recent Posts

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71
Military Radios / Re: Czech Military RF-10 Radio.
« Last post by W5IJH-Jeff on August 19, 2018, 09:23:28 AM »
I decided to take a chance and bought one from Coleman's. It should be here early next week. I will perform a functional check soon after unboxing. Hopefully it will be fine. I'm planning on running a 6V SLAB in it. After watching Gil's videos on military radios, I liked the durability of them. If all goes well I will buy a second. Still considering the Clansman PRC-352 as well.
72
Tactical Corner / Re: RTO Class / Brushbeater
« Last post by Rowsey1108 on August 19, 2018, 09:22:34 AM »
I went last weekend. It was a very good basic class for the prepper to use inexpensive, off the shelf and homemade gear. Hes a very competent instructor who brings years of military and ham radio education and experience into one class. He never plays Rambo or toots his own horn. Hes very competent.


Sent from my iPhone using Tapatalk
73
Tactical Corner / Re: RTO Class / Brushbeater
« Last post by W5IJH-Jeff on August 19, 2018, 09:18:41 AM »
No, but I would love too. Going to add it my Things to Do List for 2019. Would like to hear about your experience after you attend. Cheers, Jeff.
74
Oh yeah, a lot of guys doing FT8 and other modes. I'm just not in to digital modes so I haven't paid much attention to it.

Joel
N6ALT
75
Has anyone been using it with digital modes in any context ?

N1KTJ


Sent from my iPhone using Tapatalk
76
Don't know if any of you have been following the debacle going on over at the bitx20.io group regarding the uBitx, but those few fortunate people who have quality Spectrum Analyzers and know how to use them, have found that the uBitx 'mostly' does not pass FCC specs, (US), for spectral purity, (some nasty spurs). Some are advising not to use them on the air until some kind of fix is figured out. Funny I have been using mine every since they came out and nobody has knocked at my door yet, but I don't want them to either. All of the EE's on the group are seeking to redesign the uBitx to meet specs. I find this whole thing to be rather disheartening after all the time and effort I put into my two radios. They are talking about cutting the traces going to the LPF section and adding a daughter board with a new LPF design to fixed the existing boards. Not quite sure what to do but wait and see what everybody comes up with. :( :-[ :-\

Joel
N6ALT
77
Technical Corner / Re: Armored BitX40.
« Last post by ELK on August 09, 2018, 10:24:31 AM »
Hi everyone !

I have ordered 2 different kinds of 4x4 and 4x5 membrane matrix keyboards to simulate Gil's military keyboard and work on the corresponding Arduino code.

While waiting for them to come from China (with a bunch of other thingies for my Arduino ecosystem), I am working on adding morse code "talking" capacities to report useful data without any display to the original BitX40 Raduino code.

My main issue is to find enough free pins to connect the keyboard, a buzzer (passive if a pwm pin is available, active if not) for morse rendition and a pin to read battery voltage via a voltage divider (or a specific voltage/current sensor like INA169 and its successors).

I'll get you in touch of my progression...


73! de Stan.
78
Technical Corner / Re: Armored BitX40.
« Last post by gil on August 09, 2018, 09:27:56 AM »
Back to work!

Actually, thanks to ELK here, Stan, this project just might see the light of day.

Stan is working on the Arduino code to drive the DDS, the Si5351A, to output from 4750 to 5250kHz, which translates to 6950 to 7450kHz for the BitX40.

Here is the list of the keys to be used on the keyboard:

  • Numbers 0-9: Same.
  • Clr: Clear entry, reset.
  • Sto ENT: Enter frequency.
  • Batt CALL: Battery voltage output in Morse.
  • Freq: Frequency output in Morse.
  • Send OFST: + 100Hz. Hold +half-second=+100Hz 5x/sec (+500Hz/sec).
  • TIME: - 100Hz. Hold +half-second=-100Hz 5x/sec (-500Hz/sec).

Also planned are a confirmation beep and an out-of-range beep, maybe a battery low every-5-sec beep below a certain voltage to be determined.
I will let him post about his progress here  :)

Stay tuned...

Gil.
79
General Discussion / Rado Preppers on Facebook.
« Last post by gil on August 09, 2018, 06:07:13 AM »
80
General Discussion / 73s from Croatian Adria
« Last post by CroPrepper on August 08, 2018, 05:28:08 AM »
I am on vacation atm and tried out some setups with sea as a reflector. Quite surprising results...

https://youtu.be/IKrAj1hCdh4

https://youtu.be/Cbc9gpA9hak

Via TapaTalk

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