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Forum: Antenna August 22nd 19, 09:21 PM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/22/2019 5:11 AM, John S wrote:
On 8/22/2019 3:42 AM, amdx wrote:
On 8/19/2019 9:11 PM, John S wrote:
On 8/19/2019 6:12 PM, amdx wrote:
On 8/15/2019 2:41 PM, John S wrote:
On...
Forum: Antenna August 22nd 19, 09:42 AM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/19/2019 9:11 PM, John S wrote:
On 8/19/2019 6:12 PM, amdx wrote:
On 8/15/2019 2:41 PM, John S wrote:
On 8/15/2019 8:46 AM, amdx wrote:
On 8/14/2019 7:11 AM, John S wrote:
On...
Forum: Antenna August 20th 19, 12:12 AM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/15/2019 2:41 PM, John S wrote:
On 8/15/2019 8:46 AM, amdx wrote:
On 8/14/2019 7:11 AM, John S wrote:
On 8/13/2019 9:29 AM, amdx wrote:
On 8/9/2019 8:06 AM, John S wrote:
On...
Forum: Antenna August 15th 19, 02:46 PM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/14/2019 7:11 AM, John S wrote:
On 8/13/2019 9:29 AM, amdx wrote:
On 8/9/2019 8:06 AM, John S wrote:
On 8/8/2019 11:45 AM, amdx wrote:
Hi all,
If you put two coils on one form,...
Forum: Antenna August 15th 19, 02:40 PM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/13/2019 7:26 PM, Allodoxaphobia wrote:
On Tue, 13 Aug 2019 09:29:19 -0500, amdx wrote:

file:///C:/Users/Lamont/Dropbox/contra%20wound%20coil%20with%20flux%20and%20current%20flow.jpg
...
Forum: Antenna August 13th 19, 03:29 PM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

On 8/9/2019 8:06 AM, John S wrote:
On 8/8/2019 11:45 AM, amdx wrote:
Hi all,
If you put two coils on one form, but wind one in the opposite
direction, Do the currents flow in opposite...
Forum: Antenna August 8th 19, 05:45 PM
Replies: 12
Views: 784
Posted By amdx[_3_]
A question about two coils on one form

Hi all,
If you put two coils on one form, but wind one in the opposite
direction, Do the currents flow in opposite directions?

Mikek

PS. opposite winding direction as in...
Forum: Antenna April 7th 19, 05:06 AM
Replies: 1
Views: 151
Posted By amdx[_3_]
[QRZ] Interesting qualities of 'hybrid baluns'.

On 4/6/2019 4:21 AM, QRZ.com via rec.radio.amateur.moderated Admin wrote:

Antennas, Feedlines, Towers & Rotors

///////////////////////////////////////////
Interesting qualities of 'hybrid...
Forum: Antenna September 12th 18, 03:23 AM
Replies: 20
Views: 1,749
Posted By amdx[_3_]
Earth rods, etc

On 9/10/2018 3:19 PM, A. non Eyemouse wrote:
On Fri, 7 Sep 2018 09:37:53 -0500
amdx wrote:


I ran a 253ft BOG antenna,

What DX did you hear with it and on what...
Forum: Antenna September 7th 18, 03:37 PM
Replies: 20
Views: 1,749
Posted By amdx[_3_]
Earth rods, etc

On 9/6/2018 5:46 AM, Gareth's Downstairs Computer wrote:
Unearthed the previous fan of plumbers' copper microbore tubes
and associated ground rod to find a corroded and non conductive
mess and...
Forum: Antenna February 24th 18, 02:19 PM
Replies: 3
Views: 316
Posted By amdx[_3_]
How to best choke a receiver feedline

On 2/24/2018 7:21 AM, amdx wrote:
On 2/24/2018 3:22 AM, Helmut Wabnig wrote:
On Fri, 23 Feb 2018 15:34:17 -0600, in rec.radio.amateur.antenna you
wrote:

On 11/16/2017 1:36 AM, Helmut...
Forum: Antenna February 24th 18, 01:21 PM
Replies: 3
Views: 316
Posted By amdx[_3_]
How to best choke a receiver feedline

On 2/24/2018 3:22 AM, Helmut Wabnig wrote:
On Fri, 23 Feb 2018 15:34:17 -0600, in rec.radio.amateur.antenna you
wrote:

On 11/16/2017 1:36 AM, Helmut Wabnig wrote:
On Thu, 9 Nov 2017...
Forum: Antenna February 23rd 18, 09:34 PM
Replies: 3
Views: 316
Posted By amdx[_3_]
How to best choke a receiver feedline

On 11/16/2017 1:36 AM, Helmut Wabnig wrote:
On Thu, 9 Nov 2017 15:23:15 -0600, amdx wrote:

I'm installing an active antenna.
...
Forum: Antenna October 30th 17, 11:00 PM
Replies: 2
Views: 396
Posted By amdx[_3_]
Active Antennae?

On 10/8/2017 6:29 AM, Burt Evans wrote:
While looking for a does it all antennae for my Kenwood R5000 receiver
(with the 108-174 MHz option) I came across this website:

...
Forum: Antenna April 28th 17, 03:21 PM
Replies: 2
Views: 503
Posted By amdx[_3_]
Your antennas?

On 4/28/2017 6:44 AM, Gareth's Downstairs Computer wrote:
The HF antenna here is a G5RV, dangling down at one
end in order to fit in.

2M has a colinear which I picked up at the Flight
...
Forum: Antenna April 24th 17, 08:03 PM
Replies: 7
Views: 525
Posted By amdx[_3_]
Fractal Antennas

On 4/24/2017 12:23 PM, rickman wrote:
Ok, I was invited to start a new thread and the very strange person who
invited me to do this seemed to say he would not be participating, so
here it...
Forum: Antenna April 24th 17, 07:45 PM
Replies: 54
Views: 4,913
Posted By amdx[_3_]
Where's Chip when you need him!

On 4/24/2017 10:37 AM, wrote:
On Monday, August 5, 2013 at 12:52:47 PM UTC-4, amdx wrote:
This newsgroup is very slow.
I remember fondly when Chip was here taking a...
Forum: Antenna April 24th 17, 07:41 PM
Replies: 54
Views: 4,913
Posted By amdx[_3_]
Where's Chip when you need him!

On 4/24/2017 12:37 PM, wrote:
wrote:
On Sunday, April 23, 2017 at 9:16:13 PM UTC-4, wrote:
...
Forum: Antenna April 24th 17, 07:34 PM
Replies: 54
Views: 4,913
Posted By amdx[_3_]
Where's Chip when you need him!

On 4/23/2017 3:49 PM, wrote:
On Sunday, April 23, 2017 at 3:25:07 PM UTC-4, rickman wrote:
On 4/23/2017 3:00 PM, wrote:
On Sunday, April 23, 2017 at...
Forum: Antenna March 1st 17, 08:58 PM
Replies: 54
Views: 4,913
Posted By amdx[_3_]
Where's Chip when you need him!

On 2/28/2017 11:05 PM, wrote:
wrote:
On Monday, August 5, 2013 at 12:52:47 PM UTC-4, amdx wrote:
This newsgroup is very slow.
I remember...
Forum: Antenna July 26th 16, 03:15 AM
Replies: 20
Views: 2,342
Posted By amdx[_3_]
Anyone recommend a source of 36:50 ohm ununs?

On 7/25/2016 5:18 PM, Robert Smits wrote:
Hi. Can anyone recommend a source of 36:50 ohm ununs?

I'm adding an inverted L for 160 meters and would like to add an unun of 36
ohm to 50 ohms to...
Forum: Antenna July 22nd 16, 06:42 PM
Replies: 11
Views: 1,777
Posted By amdx[_3_]
6:1 balun

On 7/22/2016 11:44 AM, Ralph Mowery wrote:


Does anyone have a good link or design for a 6:1 balun ?

I bought some 420 cores and am stacking 2 of them to handle 1.5 kw. I
wound one using...
Forum: Antenna May 4th 16, 07:10 PM
Replies: 1
Views: 1,122
Posted By amdx[_3_]
Cleaning out QEX magazines

On 5/3/2016 6:28 PM, wrote:
On Tuesday, April 12, 2011 at 5:13:10 PM UTC-4, amdx wrote:
I have a 22 lb box of QEX magazines from June 1982 to 1994.
About 140 issues. I don't...
Forum: Antenna March 6th 16, 03:45 PM
Replies: 1
Views: 1,255
Posted By amdx[_3_]
Good Old Sony AN-1

On 3/6/2016 8:22 AM, joel rochow wrote:
Used AN-1 with Sony ICF-5900W in downtown Washington, DC, and the
results were excellent. Ditto out in countryside in Reston, VA.

That was back in the...
Forum: Antenna March 5th 16, 04:39 PM
Replies: 3
Views: 1,163
Posted By amdx[_3_]
Guyed Points Rohn 25G

On 3/5/2016 9:09 AM, wrote:
Getting ready to stack a Rohn 25G 190' well started getting the Guy Points dug out we hit major Ledge. Sucks. So if I cant go deep can I make up...
Showing results 1 to 25 of 153

 
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