Log-Periodic Antenna Design

I think you have to be a member of the Microwave Theory & Techniques Society to it. I'm a member of the IEEE and several of its Societies, but not that one, and I'm denied access to the paper. Too bad it wasn't published in Ant & Prop.

Roy Lewallen, W7EL

Sorry I didn't fully describe how to get the file. It's a Word document, so the URL above takes you to a page where you can choose "download", and then you can open it with Microsoft Word.

Chuck W6PKP

=_NextPart_000_001B_01C94E94.3971B790 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: quoted-printable

:-)

throw-back=20

tool.=20

design=20

output=20

input=20

I'm really disappointed in the comcast customer's website - - I tried to = access the program later in the evening and found it required I sign in =

- - even though I specified the file to be "public". Let me know if you = have trouble getting the file. I would appreciate any recommendation for = a better way to access the Word document than the use of this comcast = facility.

no more free tv?? where do you live?

here in the usa over the air tv is , was and shall remain free

in feb it will switch to digital however shall still be free

Digital is a major step toward "conditional access".

So is analog. If you don't have the proper reciever, you can't pick it up. Just a different format.

And the 80 year old method of modulation, a combination of pulse, FM, and analog was just as much a restriction to specialized equipment. If you tried to get TV on your XTAL radio, it would be like listening to an encrypted secure network.

If you stood out in a field and tried to listen to AM radio waves (without even the boon of that XTAL radio), you would still suffer "conditional access."

So, what is the big deal?

Until you get to the requirement to line the pockets of the converter hawkers.

Thanks, Rich

Even they used to be free, if you knew where to dumpster-dive. ;-)

Cheers! Rich

Being required to turn over my hard-earned cash to further enrich the rich fat white executives.

Thanks, Rich

Too late! I've already built the 4-bay bowtie:

But I used ER70S-2 1/16 weld filler rod (stiffer than a coathanger, and copper-plated; solders like a dream):

And it works just spiffy! I had to go to Whittier Electronics to get the balun, since RS seems to have dropped them from their line-up:

It was $2.99; the rest of the antenna was free. :-) (yes, I'm really that broke. )-; )

Thanks, Rich

The current situation is somewhat analogous to what happened, decades ago, when television in the U.S. moved from VHF-only to VHF-plus-UHF.

Everybody who wanted to receive the full set of channels, had to either buy a new TV, or buy a UHF block converter so that they could downshift the UHF frequencies to a VHF frequency that their existing TV set could receive.

The television signal is, and will remain, free to receive (or, rather, its transmission is funded by advertising). There is no fee on the user to receive the TV signal.

The equipment needed to receive TV signals in the U.S. is not, and never has been free.

This is a somewhat bigger switch-over, technology-wise, than the expansion to UHF some years ago. Whether it's a Good Thing or a Bad Thing is, I think, much more of a personal conclusion than anything that can be decided objectively.

A converter box can be had for about the same amount of cash as a cup of coffee after using the coupon, so that arguement is moot.

What "rich fat white executives" do you think are getting enriched by the switch since almost all the converter boxes are made in China?

The converter boxes are essentially free with the coupon and you get two of them.

After the $40 free coupon, the DTV converter box costs $10. If you skip three Whoppers, you've got the money and are a healthier human being to boot. :-)

OK. I don't have a big problem with folks using frequencies they're not assigned when there isn't an interference issue, although I also don't have a whole lot of sympathy for those same folks if one day they *are* interfered with by assigned users.

What are the power levels? Presumably the occupied spectrum is potentially many tens of MHz?

If these are consumer-type devices, realistically how will the FCC stop their use in those 13 cities? It'll be like GMRS where technically everyone's supposed to be licensed yet, in actuality, I imagine that well under 1% of the actual users are: If the consumer can buy a radio off-the-shop at Wal*Mart, there'll use it wherever they want, regardless of what FCC rules say.

---Joel

There are several outfits with converter boxes for $40.01, which makes your cost 1 cent.

Thanks, Rich - - it looks great. I'm going to try putting one together, too - - the phased quad bow-tie is very popular so it must be a good performer. And the price is right.

Chuck