Please recommend a good, affordable supply of vintage parts like grid leaks, mica capacitors, variometers, etc.. No eBay please....
578
loopantennas@yahoogro...
Apr 1, 2005 1:45 pm
If you have a link relevant to the group, please post it in the Links section. If you just put it in a message, it will get lost in the shuffle after a few...
579
Alan Rentch
alan_rentch
Apr 1, 2005 2:57 pm
... You are right. I wonder how it got changed. I have not logged onto the web site in months. Everything received through 3/30/05 was text. Guess Capser...
580
jr_dakota
Apr 1, 2005 4:49 pm
Antique Electronics Supply http://www.tubesandmore.com/ They are good but affordable is a relative term and may mean something different to you and to me ... ...
581
Jerome
jeromeg7492000
Apr 3, 2005 1:30 am
Has anybody done anything with a television decausing coils as antenna's ? Jerry _______________________________________________ No banners. No pop-ups. No...
582
Dennis Bauer
redcup22000
Apr 3, 2005 11:27 pm
Hi all, i want to build a two foot square loop for am broardcast band, about 16 turns, how close should the windings be, thanking you all Dennis Bauer Cheers. ...
583
E.C. Van Der Eecken
vandk66
Apr 4, 2005 3:22 am
Hi Dennis, I'd try about 3/16" spacing.I've used as close as 1/8" and a 365 pf capacitor and it works fine. 73 K6QGH Van ...
584
Dennis Bauer
redcup22000
Apr 4, 2005 7:42 am
Thanks for that Van, i'll go ahead with 3/16", cheers, Dennis. Dennis Bauer VK4JDJ Po Box151 Herberton ph 07 4096 2574 desueo@......
585
Jim Dunstan
norlink88
Apr 4, 2005 4:33 pm
... Hi Dennis: I don't think you need to be too scientific about it .... depending on your construction plan, I would space the windings to occupy the design ...
586
Michael Hebert
qrpbear
Apr 5, 2005 2:11 am
Jerry, Degaussing coils work very well as untuned VLF antennas. I have a 1- meter diameter degaussing coil on the roof of the building for reception of VLF...
587
g0aqi@...
g0aqi
Apr 5, 2005 4:49 pm
Hello list. Is there anyone out there with experience of the AOR active loop aerials, (LA350, WL-500 etc)? I heard somewhere that they work well but, HOW...
588
Thomas Giella KN4LF
thomasgiella
Apr 7, 2005 7:36 pm
The KN4LF Daily LF/MF/HF Radio Propagation Outlook #2005-014 has been published on 1900 UTC Thursday April 7, 2005 at http://www.kn4lf.com/kn4lf6.htm . 73 &...
589
Darren Hennig
phones414
Apr 8, 2005 3:16 pm
I have had my WL-500 for over 2 months now, and it is a very good portable active antenna! I have used it successfully with my Satellit 800, my Sony...
590
Adam E.
gccengineering
Apr 9, 2005 6:42 pm
Hello everyone, Does bigger gauge wire really increase the Q factor of the loop? Cause the 30 gauge wire did not any gain and I wondering if I should use ...
591
Dimitri Aguero
d_aguero
Apr 9, 2005 7:37 pm
Good evening, ladies and gentlemen. I have seen in a magazine a Delta Loop for the 17m band. The loop is exactly 1 wavelength long, and it used a single 6m...
592
john nelson
jnelson123_us
Apr 9, 2005 8:27 pm
Sensitivity for a given loop is determined by turns times aperature. Selectivity or "Q" is determined by wire size. There are people using coiled copper pipe...
593
john nelson
jnelson123_us
Apr 9, 2005 8:36 pm
Try a Google search. This is what one turned up, there were quite a few hits. http://www.thebrowns.fsnet.co.uk/20mdelta.htm John Nelson ... ...
594
gplynas
Apr 9, 2005 9:20 pm
Adam, Q of the antenna will depend on many different factors. In general, the larger the cross-sectional area of the loop, the less wire that will be required...
595
Henry Kolesnik
wd5jfr
Apr 9, 2005 10:00 pm
Optimum Q is a function of wire size, coil diameter vs length and winding spacing as well as resistance. Some time back QEX a magazine published by ARRL had...
596
Scott Erwin
n4zou
Apr 9, 2005 10:26 pm
There are many ways to feed a 1 wavelength Delta loop antenna. The easy way is to make a feed line transformer from 75 ohm coax. 234 divided by 7.15 times .75...
597
vfl2
Apr 13, 2005 6:26 pm
Hi everybody. I'm Marc, VE3GIX in Windsor Ontario just across the ditch from Detroit, Michigan. I'm very happy to be a member of this group. I used to AM...
598
vfl2
Apr 13, 2005 6:27 pm
Back in the late '80s, I did some solar flare patrol work using mostly NAA in Cutler ME on 24 kHz. A 140 turn box loop was constructed on an 18 inch frame and...
599
g0aqi@...
g0aqi
Apr 13, 2005 7:45 pm
In a message dated 13/04/05 19:32:38 GMT Daylight Time, vfl2@... writes: Hi everybody. I'm Marc, VE3GIX in Windsor Ontario just across the ditch from...
600
gplynas
Apr 14, 2005 1:34 am
The probable reason for the loss of Q is in the contact resistance of the wipers at each end of the rotor. With a small oxide film in the contact space this...
601
Thomas Giella KN4LF
thomasgiella
Apr 14, 2005 5:26 pm
The KN4LF Daily LF/MF/HF Radio Propagation Outlook #2005-015 has been published on 1700 UTC Thursday April 14, 2005 at http://www.kn4lf.com/kn4lf6.htm . 73 &...
602
g0aqi@...
g0aqi
Apr 17, 2005 5:31 pm
Hi Group. I'm trying to find some designs for MW BCB traps, (series and/or parallel), that I can build, using small toroids wound with the right amount of...
603
Dimitri Aguero
d_aguero
Apr 17, 2005 5:52 pm
You may want to contact F8DKK He published in April's number of a French magazine an article describing not one, but two Chebycheff filters for filtering...
604
gplynas
Apr 17, 2005 8:03 pm
The following is a simple Butterworth filter which will give about 300 KHz bandwith (of the notch), as much as 60 db of attenuation at center frequency and is...
605
lanierart
Apr 17, 2005 8:47 pm
OK, so I am new to this and will likely ask some stupid questions, but here goes. I built my first unit this week; a box shape, oak, with 19" sides. I used...
606
Torben Mellerup
oz1tmk
Apr 17, 2005 8:47 pm
Hi I have made a 90cm loop with 14mm CATV-cable (it has a full cu tube :-)). This loop is designed mainly for listening on 40 meters and none HAM freq. around...
