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Total 12 documents matching your query.

1. LF: air solenoids (score: 1)
Author: Christoph Schumacher <[email protected]>
Date: Fri, 25 Oct 2013 21:53:45 +0200
Dear all, is there anyone who was concerned sometime with the self radiating properties of single layer air solenoids without any piece of antenna wire? 73 dl7saq, Chris
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00258.html (9,590 bytes)

2. RE: LF: air solenoids (score: 1)
Author: Bob Raide <[email protected]>
Date: Fri, 25 Oct 2013 17:05:56 -0400
no, cylindrical coils Am 25.10.2013 22:11, schrieb Graham: toroidal ? From: mailto:[email protected] CTRL + Click to follow link Christoph Schumacher Sent: Friday, October 25, 2013 8:53 PM To:
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00395.html (13,411 bytes)

3. RE: LF: air solenoids (score: 1)
Author: "hvanesce" <[email protected]>
Date: Fri, 25 Oct 2013 16:58:59 -0500
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00396.html (17,489 bytes)

4. RE: LF: air solenoids (score: 1)
Author: "Clemens Paul" <[email protected]>
Date: Sun, 27 Oct 2013 08:56:30 +0100
Hi Christoph, from the coil parameters you have given I would estimate an unloaded coil Q of roughly ~500 on 137kHz. I guess you've made your measurements with the measuring equipment galavanicaly co
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00397.html (13,210 bytes)

5. Re: LF: air solenoids (score: 1)
Author: Christoph Schumacher <[email protected]>
Date: Fri, 25 Oct 2013 22:20:52 +0200
no, cylindrical coils Am 25.10.2013 22:11, schrieb Graham: toroidal ? From: Christoph Schumacher Sent: Friday, October 25, 2013 8:53 PM To: [email protected] [email protected] S
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00674.html (11,389 bytes)

6. Re: LF: air solenoids (score: 1)
Author: Warren Ziegler <[email protected]>
Date: Fri, 25 Oct 2013 16:49:50 -0400
no, cylindrical coils Am 25.10.2013 22:11, schrieb Graham: toroidal ? From: Christoph Schumacher Sent: Friday, October 25, 2013 8:53 PM To: [email protected] [email protected]
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00675.html (13,407 bytes)

7. Re: LF: air solenoids (score: 1)
Author: "Graham" <[email protected]>
Date: Fri, 25 Oct 2013 21:11:14 +0100
toroidal ? From: Christoph Schumacher Sent: Friday, October 25, 2013 8:53 PM To: [email protected] [email protected] Subject: LF: air solenoids Dear all, is there anyone who was
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00676.html (10,701 bytes)

8. Re: LF: air solenoids (score: 1)
Author: "Graham" <[email protected]>
Date: Fri, 25 Oct 2013 22:28:15 +0100
round ones do radiate though , depends if that's the object of the enquiry ! G, From: [email protected] Christoph Schumacher Sent: Friday, October 25, 2013 9:20 PM To: rsgb_lf_group@blacksheep.
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00677.html (11,812 bytes)

9. Re: LF: air solenoids (score: 1)
Author: Christoph Schumacher <[email protected]>
Date: Sat, 26 Oct 2013 23:42:50 +0200
Hi Graham, Warren, Bob, Rik, Jim thanks for your comments. What I found (by chance) is a series resonance in the impedance spectrum of solenoid air coils, a little underneath the high impedance paral
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00678.html (20,336 bytes)

10. Re: LF: air solenoids (score: 1)
Author: [email protected]
Date: Sat, 26 Oct 2013 23:39:37 +0000
Chris, Sounds intriguing. You're near the portion of the near field referred to as the reactive field (sometimes as induction field which is less precise but pertinent here). At your 1km distance, co
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00679.html (22,920 bytes)

11. Re: LF: air solenoids (score: 1)
Author: Christoph Schumacher <[email protected]>
Date: Sun, 27 Oct 2013 21:21:13 +0100
Hi Clemens, thank you for the great idea. I will try to stimulate the lf coil without a galvanic contact and look what happens. cu next weekend 73 Christoph, dl7saq Am 27.10.2013 08:56, schrieb Cleme
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00680.html (13,834 bytes)

12. Re: LF: air solenoids (score: 1)
Author: Christoph Schumacher <[email protected]>
Date: Sun, 27 Oct 2013 21:18:41 +0100
Jim, of course you are right, at 1.5 wave lengths the field conditions are still complex. I need little more power for a larger distance. I have to invent something. The cw signal was normal decoded
/rsgb_lf_group-archives/html/rsgb_lf_group/2013-10/msg00681.html (24,684 bytes)

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