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Recent Posts

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71
Antennas / Re: The 49:1 Half-Wave End-Fed Transformer Campain is ON!
« Last post by M0ORY on January 13, 2019, 06:34:39 PM »
I seem to recall reading somewhere that -43 was a good mix to use for the transformer cores however -52 supposedly performed slightly better but was more expensive. I made my first 49:1 transformer out of a pair of stacked FT140-43 cores and it worked a dream when I tested it on 80m wspr. I decided to get some -52 mix cores. I got a 150-52 and a bag full of 44-52 beads as they were cheap and I thought might be useful for threading over some coax to make a choke. Today I had the idea to make a 49:1 out of a couple of the 44-52 beads stacked. I used 4 beads and the finished transformer measures just 20mm long by 14mm wide. It might not stand up to much power but even if it dissipated a full 5w it's take a while to burn up. I'm going to go out and test it side by side with the 150-52 and 2x140-43 but if it works it'll make a brilliant transformer for prepping when paired with something like the LNR precision Mountain Topper. Actually come to think of it I have some small -43 mix cores too left over from another project so I'll make another out of four of those first and test all four over the next week or so. If they work I'll also try potting them in epoxy in a small container. I think I have an old APS film canister kicking around somewhere which would be ideal. I might be able to 3D print something even smaller though.
72
Radio Reviews, Questions and Comments. / Re: Retevis Mobile Portable Analog Repeater RT97
« Last post by gil on January 08, 2019, 01:43:55 PM »
Thanks, that is pretty interesting for prepping!

Gil.
75
Digital Modes / My adventures with J8CALL uBITX and interfacing Digital HF
« Last post by N6GRG on January 07, 2019, 04:48:11 PM »
JS8CALL ROCKS ! now that I've gotten that out of the way, I must say, I'm really having fun with this. Its amazing just how far you can tx and rx. I am currently a beginner with HF Digital and I'm little by little interfacing (some might say the hard way in that I didn't run out and buy the Signal …. box. I'm just using used stuff. I'm getting my PTT control via a Rigblaster Plus. Seems to work well, controlled easily by all software (FLDIGI, the FT8 software, and JS8CALL. It is the type of control I feel better about because any type of control without good interfacing and isolation might do damage. That said, I did not like the audio interfacing. So, I think I'm going with a transformer based type, the Easy Digi. should be easy to troubleshoot and work with it. I'll let you know how it goes. I've got the easy digi, (had for a while) and just need to find or look up the docs. That all said, even with the microphone and speaker based system I have now I cannot complain. But, it is noisy, so I'm changing that. So, what do you think ? Marconi ? who was Marconi heh heh
76
General Discussion / Re: Update and The Necessity to Educate People.
« Last post by gil on January 02, 2019, 04:18:29 PM »
Quote
Once your are more settled-in, videos of exploring your new home region should be quite interesting.

I sure hope so! I might have to go to Italy for off-roading though, since of course in France it's prohibited pretty much everywhere... No surprise here... Fortunately Italy is very close :)

Gil.
77
General Discussion / Re: Update and The Necessity to Educate People.
« Last post by RadioRay on December 29, 2018, 05:55:59 PM »
Congratulations on the Toyota Land Cruiser!  Those are great vehicles. Once your are more settled-in, viedos of exploring your new home region should be quite interesting.

73 de Ray  ..._ ._
78
General Discussion / Update and The Necessity to Educate People.
« Last post by gil on December 28, 2018, 01:16:26 PM »
Hello guys, and girls I guess, if any. I hope you all had a merry Christmas. I have only been lurking in the shadows lately and removing spam, a lot of spam lately… Someone must have added the site to a bot list… I upped the security, and involuntarily the complexity to sign-up, but it was hard to avoid. The Radio Prepper channel is keeping me pretty busy, not to mention my move to the south of France. I brought very little radio gear with me but I do have plans, some of which involve vehicle radio setups, starting with CB! Living now in a tiny apartment I will also need to assess that issue, probably with a new magnetic loop.

I am now waiting for a VRM-5080 VHF tank radio and a President Grant II CB for my newly acquired Toyota Land Cruiser 1989 LJ-70. The antenna I picked is the Sirio 5000. Stay tuned for upcoming videos...

BTW I was watching a B series movie on Netflix the other night with Sandra Bulloch… No, I don’t mean she was with me, only in the movie ;-) It was a story about evil entities you could not look at or you’d go crazy and kill yourself… Two hours of my life I won’t get back, but it got me thinking about the necessity to educate people.

In the movie, after the SHTF, a group of survivors scavenges a bunch of FRSS/GMRS radios from a store. They call every day hoping to hear someone, and eventually they do… Someone who is presumably at least  48hrs away by river boat… Which in reality is very  unlikely to happen given the distance. I have seen the same thing happen in other series like “The Walking Dead.” Walkie-Talkies as soon as they appear on the screen become quasi-sat-phones or super-duper NVIS HF handhelds… We know it’s BS, but most people probably believe those lies, the same way they believe Hollywood guns hype. They think you just find a radio, any kind, and the world is at your fingertips. I would not be surprised if many preppers held similar beliefs. Many will only learn enough to use an SWR meter and make sure they don’t fry their radio. No thought is given to antenna design and polarization, propagation modes, modulation modes or bands to use at different times or seasons. Sure, they might get lucky, but not always… You break down somewhere and try to call on a CB frequency during the solar-cycle low, as now, you probably won’t cover but a 20 mile radius, if you’re lucky. You can forget about your FRS or PMR little handheld…

It is our responsibility to educate, and not just other HAM operators… CBers, preppers, outdoor enthusiasts, can all benefit. We can do this without coming across as elitist pricks, which to my dismay is a reputation a few bad apples have brought upon the HAM community in some places.

On a more personal note, I am just coming out of a bad cold, and three weeks of moving, paperwork, new job, settling down hell I hope not to have to repeat too soon, and it's not quite over yet. That said, the region is beautiful, and much warmer than the north of France!

Gil.
79
Radio Reviews, Questions and Comments. / Re: Got my 1st CW rig
« Last post by solaris0121 on December 21, 2018, 03:57:39 AM »
ok thanks  - I read the manual but it isnt very clear and YouKits arent replying to my messages.  Hopefully VWflier will know.... :o
80
Radio Reviews, Questions and Comments. / Re: Got my 1st CW rig
« Last post by RadioRay on December 20, 2018, 08:01:56 PM »
1st - IT's been a few years and though that is how I remember it, CHECK YOUR MANUAL. The radio you save will be your own ;-)

2nd - If VWflier reads this, he can answer, because he bought it from me.


73 de Ray ..._ ._
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