Welcome Guest! Be sure you know and follow the Phorum Rules before posting. Thank you and Enjoy! (January 12) x

Thread Closed
Thread Rating:
  • 0 Vote(s) - 0 Average
  • 1
  • 2
  • 3
  • 4
  • 5

48-482
#9

I got curious about twin lead antennas for FM. I had measurements around somewhere but those included the velocity factor for the twin lead used, 0.86 or so.

I would assume that velocity factor applies to using the twin lead as a receptor element as much as it does for a transmission line. Therefor, the length given for the element should be multiplied by that factor for that particular station frequency in the article. Too long is not in of itself not going to work but it may work better if the correction is made...

Chas

Pliny the younger
“nihil novum nihil varium nihil quod non semel spectasse sufficiat”


Messages In This Thread
48-482 - by falcon123 - 07-23-2022, 07:49 AM
RE: 48-482 - by morzh - 07-23-2022, 09:57 AM
RE: 48-482 - by RodB - 07-23-2022, 09:58 AM
RE: 48-482 - by David - 07-23-2022, 12:14 PM
RE: 48-482 - by mikethedruid - 07-23-2022, 01:12 PM
RE: 48-482 - by falcon123 - 07-23-2022, 06:26 PM
RE: 48-482 - by mikethedruid - 07-23-2022, 07:01 PM
RE: 48-482 - by falcon123 - 07-24-2022, 02:38 AM
RE: 48-482 - by Chas - 07-24-2022, 01:20 PM



Users browsing this thread: 3 Guest(s)
[-]
Recent Posts
Philco 46-480 Electronic Restoration
The donor chassis looks pretty good, based on the photo I saw.jrblasde — 08:43 AM
Philco 46-480 Electronic Restoration
Is the chassis in the parts set less rusty then the one you have been working on or about the same?Arran — 02:50 AM
Gloritone 27 Radio
Hi Dconant, Yeah, I think someone tried to combine the 2 functions.  I don't think it will work.  In the early 27 sch...MrFixr55 — 12:04 AM
Gloritone 27 Radio
Well, now you ask that question and there we are, the time travellers.morzh — 11:44 PM
Gloritone 27 Radio
That's OK, Morzh, I do that all the time. If we could catalogue the answers to questions that no one asked, when they d...MrFixr55 — 11:35 PM
Atwater-Kent 84, restoration.
Today the 10 Ohms resistors came (It might've meant in the sch it was 10 ohm total), and soldering them in improved thin...morzh — 09:33 PM
Gloritone 27 Radio
Oops, sorry. I've answered a question no one asked. :)morzh — 02:13 PM
Gloritone 27 Radio
To clear things up a bit. The Philco pot (33-5040) is single gang 3 terminals with AC switch. The picture shows how my p...dconant — 01:52 PM
Gloritone 27 Radio
The 20 pot has two sections: one is the Antenna attenuator, the other is the cathode bias one.morzh — 12:11 PM
Gloritone 27 Radio
Does the Philco pot have only 1 element (2 or 3 terminals) or is it ganged (5 or 6 terminals)? You state that one con...MrFixr55 — 11:52 AM

[-]
Who's Online
There are currently 3663 online users. [Complete List]
» 1 Member(s) | 3662 Guest(s)
Avatar

>