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 51 
 on: Yesterday at 07:24:04 PM 
Started by W5AGK - Last post by N1UMJ
When I put mine up, it would do nothing with no radials, I could not tune 40/80 at all. I put down about 10 radials, tuned it to the former owner's settings and it fell right in where it should be, perfect SWR everywhere it should, I added about 20 or so more radials and the tuning didn't go off very much at all. In fact not even enough to bother adjusting for as I recall though I may have, if I did it was minute and I know I didn't ahve to if I didn't want to.

 52 
 on: Yesterday at 07:15:06 PM 
Started by KE4JOY - Last post by KD6RF
No one can predict the future.  

My point is that pretty much the same things were said about every advancement - massive amounts of people will become unemployed by ... tractors...plows...harvesters...cotton gins...whatever labor or time saving device you choose......

But, of course, the massive unemployment never happened.

10,00 people loose their jobs, 15,000 new jobs are created in all sorts of new fields.

If history is a guide, then AI, if it ever manifests in any meaningful manner, will be just like any other advancement, and employment patterns may shift around a bit, and we will all be better off on the average .

Thousands of new job titles will be created in fields we can't even imagine.  We can't imagine what they will be, any more than a 1900's shoe-cobbler could imagine a Network Manager's job.

Maybe I'll start studying machine psychology just in case RF engineers are ever automated out of existence Smiley


 53 
 on: Yesterday at 07:13:05 PM 
Started by W5AGK - Last post by K3GM
Yes, tuning will be necessary. As told to me by a Newtronics engineer, the published element lengths and traps are are intended for a 50 ohm feed point impedance.   That is often seen by simply bolting the antenna to a metal post.  When radials are installed one by one, the feed point impedance begins to drift lower, away from 50 ohms.  With 32 radials, a simple adjustment in length (shorter) may only be necessary.   If you go nuts with radial count, it may be necessary to return the traps.  An antenna analyzer is a very helpful tool the literally see what's going on.  Even with an analyzer, my BTV was a bear to tune over a very large, very dense radial field.

 54 
 on: Yesterday at 07:12:41 PM 
Started by KE4JOY - Last post by KU1T
Well I pretty much followed their instructions to the tee.

I sent one envelope of a certain size, inside of that envelope were several smaller envelops of the specified size with my address printed on them and ample postage clipped to the envelopes. Enough for 4 batches of cards with a little extra postage included for each.

I guess I will need to contact them, however I lost their card so not sure where to turn.

You are 2-letter 4.  Here is the URL for the Sterling Park QSL bureau..
http://www.qsl.net/sterling/QSLBuro4/QSLBuro4.html

(Yes, I am a sorter, but not for the letter "J", that will be someone else.).   The e-mail address of Dick, W2YE, Bureau manager is available there - and he usually is very prompt with response to such inquires.

73, de KU1T
_zjt


 55 
 on: Yesterday at 07:11:43 PM 
Started by K7CO - Last post by AF3Y
Paul, I (and others here, I am sure) don't have acres of land and/or a tower any longer. I am one of those you mention which don't/cant.  BUT........ I still enjoy chasing DX as much, or MORE than when I had my antenna "garden".
 
I don't need any remote alternatives to enjoy my hobby. One old 31' wire vertical out back and QRO(when needed) and a lot of effort has brought my total to 318, since moving here with 297 current. Most of these last 21 DXCC additions were pretty darn tough, but I worked em.

Regardless of the final decision, I will always believe this thing was $$ driven for the most part.

73, Gene AF3Y

 56 
 on: Yesterday at 07:08:34 PM 
Started by KC1CJN - Last post by KC1CJN
OK - two separate questions this time:

1. Random/Long Wire:  I'm trying to find the right length of wire that will work with my Yaesu FC-40 Autotuner & Yaesu FT-897D transceiver. They say 66ft+, so I put a 67ft wire to the top of a tree - it just goes up and over the top by a foot. The wire runs to the FC-40 wingnut/post connection in my garage. I was thinking of just connecting the near-end of the wire to an insulated post, and then running 1ft, 2ft, 3ft, ... Xft of wire from the post to the FC-40 antenna post to find an approximate optimal length. Sure, I might have made a 85ft wire that reached up and over the tree, and trimmed it in, but I didn't. Is what I'm proposing to do of any use, or should I just put up that 85ft wire and trim it in foot-by-foot? I'm using a ground (AC service panel bonded ground rod) and counterpoise for 10m, 17m, 20m, 40m as well, I might note.

2. I have a 64ft aluminum telescoping mast MFJ-1965. Can such a mast itself be used as a useful vertical antenna, if insulated from the ground and radials added? What do wire guy lines add to the system? I think I'll need three sets of three guy lines, so any of them could be rope or wire.

Learning as a I go - working my way through the ARRL Antenna book!

73s,

KC1CJN

 57 
 on: Yesterday at 06:58:17 PM 
Started by K7CO - Last post by N6PSE
Based on what I am hearing and reading here and elsewhere, there seems to be a stigma attached to anyone that enjoys playing around with remotes and there will always be concerns about whether they cheated or not.  Some guys need to lighten up. Not everyone gets to own acres of land or the ability to put up a tower. Those that can't but still want to enjoy chasing DX now have alternatives to enjoy. Not all of them involve commercial aspects either. There is a lot of developing and experimenting going on.

 58 
 on: Yesterday at 06:54:16 PM 
Started by KE4JOY - Last post by N5INP
Ya know, those sorts of things have been said throughout modern history, and yet living standards keep rising (except for politically generated hiccups), lifespans keep sneaking up, things just keep getting better.  

No, this will be different. Don't confuse automation with artificial intelligence. They are completely different. We can automate just as well as the Chinese, but look at all the things made in China. Why is that? It's because things still need humans to get them manufactured and they can pay a lot lower wages for those carbon units. When that changes (with A.I.) it will all change unlike anything before. Those carbon units will no longer be needed unlike historical automation improvements. Unless we figure out how to support massive amounts of people without jobs we are in for a shocking scenario.

 59 
 on: Yesterday at 06:44:20 PM 
Started by K7CO - Last post by N7SMI
I hate to see these kind of efforts go down the drain due to a rule change.

Nobody's suggesting that these types of services be outlawed and dismantled, just that QSOs from them over 120km away not count for DXCC purposes. Even if this rule does pass (I don't think it will), I still see a very strong market for such services.

 60 
 on: Yesterday at 06:40:21 PM 
Started by WY0Q - Last post by K5RT
Radials on the ground aren't resonant. Put down as many as you can fit no matter what the length. 1/8 wavelength long will do just fine. Don't forget, the more you put down, the less lossy the radials will be, which will lower the feed point impedance towards 36 ohms or so.
Go to the ArraySolutions web site for a good article on how to match verticals.
N6LF has written quite a bit about radial systems, both elevated and on the ground.
FWIW, I found using a gasoline engine law edger works great for making shallow slits to push the radial wires into.

73
Paul

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