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Posts posted by axorlov
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On 8/25/2023 at 4:31 PM, WRYC330 said:
what isn't built in China today
My company moved all production from China to Philippines and Mexico. It is some special-purpose electronic devices. It's better to build up a partnership with neighbors and allies then to feed a future adversary, even if it costs a bit more. My TK-3170s are all built in Singapore. Moot point, of course, today they are out of production.
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Dave Casler touched on important point, the common mode current, which J-pole antennas are very susceptible to. But on UHF frequencies this cute (rather ugly) loop of coax is not going to stop your common mode current at all. Better, expensive chokes are needed with UHF J-poles. This is the reason why Ed Fong antennas do not work when mounted on metal masts.
- WRYF638 and Scoutdad57
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1 hour ago, WRKC935 said:
The one boob.. I taught to tune a specific duplexer, and did it wrong. I went to him, applogized for the mistake and tried to retrain him. He was having none of that.
Most people can be programmed only once. Like a famous philosopher Kozma Prutkov once said: People a are akin to sausages. What they are filled with, they keep carrying around.
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3 hours ago, WRXD372 said:
There's no way to rule innocent men
Haha, LOL!
Alexander the Great, Julius Caesar and Napoleon are watching a parade on Red Square in Moscow in 70-s.
Alexander: If I only had tanks like these I'd conquer all of Europe and also Asia!
Julius: If I only had missiles like these I'd rule the whole planet!
Napoleon: If I only had a propaganda machine like that one, nobody ever would know that I lost at Waterloo! -
2 hours ago, Lscott said:
The fiasco with combo FRS/GMRS radios before the 2017 rule changes is a case in point
That's the reason, I hazard to guess. The combined FRS-MURS-CB should be fine, even is CB is a bit silly on a handheld.
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5 hours ago, JamesBrox said:
I've quickly learned that the scan rate on a gmrs radio is very, very, very slow. Which is ok. I get it. My question to the group....How do y'all set up scanning on your gmrs radios or do you at all?
Sure, proper scanner has a supersonic scan rate, comparing to a normal CCR, that is like a slug on a cold day. Different weight categories. However, my Kenwood TK-3170 scans fifteen 462MHz channels in about 2 seconds. Not as terrible as CCR, but not a proper scanner territory. My mobile TK-880 has a similar scan rate. With that said, I only scan when deep in the woods, since normally I'm not interested in talking to strangers.
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2 hours ago, muggz said:
To me the real question is why TETRA decided to implement key length downgrade in the TEA1 cipher.
Very likely a screw-up by people who implemented algorithm for particular hardware. I was at this very place some 20 years ago, working on TEA implementation (not related to radio). Used uint instead of int in one place, and it caused a degradation of entropy. Luckily, my mistake was caught in time and never went into production.
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6 hours ago, ChaosActual said:
Howdy folks, I was hoping someone could point me in the right direction on some cables & adapters I might need to test my Wouxan KG-UV9GX on the SW-102. I bought some cables from Amazon but the little bastards heads are too big & cannot plug into the SW-102. Any and all help is appreciated.
WRKQ838
If you want to see SWR of HT antenna, save your money. It's fool's errand. You can't get any meaningful measurements with SW-102 or any other meter, it is simply not possible. You can test power output into the dummy load, though.
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1 hour ago, WRQI583 said:
Instead of it being a hobby of experimenting and being the leader in radio communication, it has turned into a regressing place of competition on the HF bands.
Ham is exactly a hobby. Some like to compete, some don't. HF bands give you a global reach, it draws people to HF. But many are fine with the local chats on repeaters.
1 hour ago, WRQI583 said:The vhf/uhf bands have been abandoned
What? You got to be kidding. Where I live VHF FM is packed to the brim, while 70cm is empty because military restricted use, to not have an interference for the PAVE PAWS radars.
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4 hours ago, WRWH978 said:
Guessing this kenwood has seen better days, $29.99 buy it now on ebay currently:
Go jump on it. I would, if I did not have four of them already:
But you also would need programming cable, keep this in mind.
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I do not have uv-9g, and I do not sleep with anybody who has it, but I hazard to guess it's metric, and the size is either M2.5 or M3 with a standard pitch. Meaning 2.5mm or 3mm. Find a hardware store that sells metric stuff and try some bolts into that hole.
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3 hours ago, WRWH978 said:
Are the used kenwood radios on ebay worth considering or I have seen an actual new ones for higher $$$? I guess the used ones are worth pending on condition - also accessories included? Thx
There is no one-size-fits-all answer to that question. Things to consider:
- condition of the radio, how much it is beaten up;
- condition of the battery, assume you will need to replace it;
- speaker and programming port: 3170/73 have Kenwood port that is also used by the majority of CCRs, so cables and speakerphones work. 3140 has a different, more robust connector, but that means buying special programming cable that will not work with Baofengs. Do you have Baofengs? Do you plan to have Baofengs?
- you will need charger, 3170/73 takes both LiPo and NiMH batteries, so makes sense to get universal charger KSC-25;
- antenna connector, Kenwood radios generally not compatible with CCR antennas, you will need authentic Kenwood antenna, they are cheap though.In 2014 it was no brainer to get a pair or three of 3170 for $100 total, replace broken parts, get new batteries, and have a good radio for about $70 a piece. Today ebay prices on used Kenwood radios went up, so I'm not so sure anymore. New KG-805G is only $100.
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Looks like mechanical filters are still available for IC-706, while for FT-817/857/897 they are gone gone gone forever. Not available even at astronomical price. I recently bought Collins 500Hz filter for FT-817, just the filter part, and will have to roll the board on my own. 2KHz SSB filters are unobtanium now, although maybe not needed that much.
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GMRS is in the middle of business band, so the technical requirements are identical to Part 90. For example, stability must be 2.5ppm for 25KHz channels and 1.5ppm for 12.5KHz channels. Ham gear does not have such strict requirements. It is only recently (few years) when new ham HTs and mobiles started to satisfy that spec. Majority of older ham gear is drifty.
This thread shows quite well, that when "I know what I'm doing" is uttered, it is a very strong signal that person has no clue. :rolleyes
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I don't think TK-3170 is supported by Chirp, unless it's recent development. And yes, Kenwood software allows for much more than just programming frequencies.
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Like many 3-band HT's, this one has reduced power on 1.25m. However, 3W is better than Yaesu's 1.5W. If I was in the mood to buy 1.25m radio, I'd go with Wouxun.
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31 minutes ago, WRQC299 said:
What about converting a directtv dish into a VHF/UHF antenna? Decent project:
Indeed. Here the link to the original article: http://www.w6nbc.com/articles/2016-03QSTdishslot.pdf And it will continue to work with your DirecTV!
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In addition to Wouxun, any commercial Part 90/95 radio will allow configuration of all memory slots. Many radios have 128 or more channels to program. I use Kenwood TK-3170. With buttons on the front panel programmed for "home channel" and "reserve home channel" and option to have busy channel lockout it could be very safe and reliable radio to give to 5yo or somebody who has no idea about radio.
- Lscott, wayoverthere and WRUU653
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2 hours ago, back4more70 said:
I passed my ham general test last weekend
Congrats on your General, now you have a global reach with the right equipment. The next step is Generalissimo (i.e. Extra).
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1 hour ago, Lscott said:
Great article, thanks. Explains real life vs theoretical +3db advantage of wideband.
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1 hour ago, Lscott said:
That's discussed in the book at the following link.
Great book, I've read it before. But it's too damn much for the audience and the author of a certain youtube channel. Head-a-splode.
Has anyone bought the NEW Baofeng GRMS UV-5R?
in General Discussion
Posted
@Lscott What about the software for the nx-1330? it is a easily found and unlocked as for the earlier Kenwood radios? Does it cost arm and leg?