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References: [ +from:G3SEK@ifwtech.co.uk: 291 ]

Total 291 documents matching your query.

241. Re: [Amps] Choices for valve linear project 1st timer! (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Tue, 1 Feb 2005 12:13:31 +0000
Mark Hill very kindly wrote: More details, including the manual for the 'Triode Board' that contains lots you should know when embarking on a first amp. project, may be found at: http://www.ifwtech.c
/archives//html/Amps/2005-02/msg00004.html (8,685 bytes)

242. Re: [Amps] Choices for valve linear project 1st timer! (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Tue, 1 Feb 2005 12:47:21 +0000
Simon Steed wrote: Not guilty :) anyways if you have the logs for your site, this will give you all the information you need to see which files and users are hitting the site. I didn't have logging a
/archives//html/Amps/2005-02/msg00006.html (8,167 bytes)

243. Re: [Amps] 10 DB increase (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Fri, 4 Feb 2005 10:27:11 +0000
kenw2dtc wrote: Many times when someone adds 10db to the transmit side, in an A/B test, almost no one on the receiver side shows a 10 db 'S' meter increase, many times the receiver readings show a 20
/archives//html/Amps/2005-02/msg00078.html (8,625 bytes)

244. Re: [BULK] - Re: [Amps] Why price difference/TCO (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Sat, 5 Feb 2005 00:13:30 +0000
bottle in these parts, if you can find it.... -WB2WIK/6 Good Grief! That had better be a special n-years-old variety. When we're settled in the new QTH, we'll have the pleasure of driving past Scotla
/archives//html/Amps/2005-02/msg00125.html (8,103 bytes)

245. Re: [Amps] 10 DB increase (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Sat, 5 Feb 2005 09:28:53 +0000
Radioal wrote: A 10 dB increase in power will be propagated as a 10 dB increase - regardless of the state of the ionosphere, antennas, locations, etc. ________________________________________________
/archives//html/Amps/2005-02/msg00137.html (12,018 bytes)

246. Re: [Amps] 10 DB increase (score: 1)
Author: "Ian White, G3SEK" <G3SEK@ifwtech.co.uk>
Date: Sat, 5 Feb 2005 16:12:05 +0000
R. Measures wrote: The ionosphere is not a parametric amplifier being pumped by solar energy - there are some weird theories floating around that have not been proven. Al - K8EUR So why did a 20db am
/archives//html/Amps/2005-02/msg00150.html (9,172 bytes)

247. Re: [Amps] 10 DB increase (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Sun, 6 Feb 2005 09:50:36 +0000
R. Measures wrote: So why did a 20db amplifier deliver 23db during certain conditions and 20db at other times? Why assume something to be true that violates known physical laws? I assumed not, I meas
/archives//html/Amps/2005-02/msg00179.html (10,730 bytes)

248. Re: [Amps] 10 DB increase (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Sun, 6 Feb 2005 14:11:17 +0000
R. Measures wrote: Not picking on Rich in particular, but it amazes me how many hams lack the ability to look at their own measurements and to say to themselves, "Aw, come on, that can't possibly be
/archives//html/Amps/2005-02/msg00189.html (9,439 bytes)

249. Re: [Amps] 10dB and propagation (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Sun, 6 Feb 2005 23:30:46 +0000
Yuri wrote: You guys might try to poke fun at this. But there are many factors contributing to signal levels received at the other end. Antenna pattern, local ground conditions, terrain and propagati
/archives//html/Amps/2005-02/msg00208.html (8,564 bytes)

250. Re: [Amps] 10dB and propagation (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Mon, 7 Feb 2005 17:14:55 +0000
Yuri wrote: A non-linear medium would have to mean that your signal was directly affecting the ionization density or the refractive index of the troposphere. As I already said, that's wishful thinkin
/archives//html/Amps/2005-02/msg00228.html (11,113 bytes)

251. Re: [Amps] 10dB and propagation (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Tue, 8 Feb 2005 13:38:26 +0000
R. Measures wrote: Indeed, Yuri. In the early 1900s, when an Austrian patent office clerk and amateur physicist theorized that photons (which have zero-mass and travel at the speed of light) were ben
/archives//html/Amps/2005-02/msg00298.html (8,941 bytes)

252. Re: [Amps] 10dB and propagation (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Tue, 8 Feb 2005 15:39:53 +0000
R. Measures wrote: When measurements don't fit in with everything we already know, real scientists and engineers are trained to ask themselves: "Is this something really new - am I really another Ein
/archives//html/Amps/2005-02/msg00303.html (9,019 bytes)

253. Re: [Amps] Re: 10dB and propagation (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Thu, 10 Feb 2005 13:41:50 +0000
K0UM wrote: Man Oh Man...this guy just won't let this 1/2 S-Unit improvement alone! I am getting tired of listening to this bullshit on the amps reflector......and your suggestion of publishing the r
/archives//html/Amps/2005-02/msg00398.html (8,784 bytes)

254. Re: [Amps] Pi-L Check (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Thu, 17 Feb 2005 08:32:47 +0000
There is an Excel spreadsheet on my website, which does both Pi and Pi-L output networks (but not input networks). It can also include stray L and C, and a parasitic suppressor if you wish; but you c
/archives//html/Amps/2005-02/msg00558.html (7,884 bytes)

255. Re: [Amps] Fwd: Pi-L In-circuit Adjustment Question (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Thu, 24 Feb 2005 17:37:29 +0000
With a plain Pi-tank, it would do exactly what you want - in fact, you wouldn't even have to pre-set C1. If R1, R2 and C2 are already pre-set to the correct values, then the values of L1 and C1 must
/archives//html/Amps/2005-02/msg00743.html (12,649 bytes)

256. Re: [Amps] Shipping Damage (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Thu, 24 Feb 2005 17:53:52 +0000
There's worse. The UK record is held by a firm called Screwfix, who used no packing when they shipped a batch of light bulbs in the same box as... an anvil. -- 73 from Ian G3SEK _____________________
/archives//html/Amps/2005-02/msg00750.html (7,891 bytes)

257. Re: [Amps] close to off topic - how to read antenna R + jX ?? (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Mon, 28 Feb 2005 08:34:09 +0000
I used to have one too, but let mine go after building N2PK's 50kHz-60MHz Vector Network Analyser. This is professional-quality VNA that amateurs can build for about $200 in parts (though it's defini
/archives//html/Amps/2005-02/msg00925.html (10,843 bytes)

258. Re: [Amps] close to off topic - how to read antenna R + jX ?? (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Mon, 28 Feb 2005 09:58:24 +0000
Fair point (though with decreasing accuracy). One point that has emerged from N2PK's work is that the 60MHz sweep range of the basic instrument can be shifted upward to any higher frequency by using
/archives//html/Amps/2005-02/msg00927.html (9,696 bytes)

259. Re: [Amps] Alpha 77Dx -Adding Grounded Grid Filament Choke (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Sat, 5 Mar 2005 16:55:37 +0000
Epcos (Siemens) and Semitron make them, among others. For example, a search for GAS DISCHARGE TUBE at www.farnell.com will produce 37 different kinds. Unfortunately the technical data via the Farnell
/archives//html/Amps/2005-03/msg00105.html (10,308 bytes)

260. Re: [Amps] Regulated AB Bias schematic (score: 1)
Author: Ian White G3SEK <G3SEK@ifwtech.co.uk>
Date: Thu, 10 Mar 2005 07:09:12 +0000
Follow the links through to the 'Best of In Practice' pages. -- 73 from Ian G3SEK 'In Practice' columnist for RadCom (RSGB) http://www.ifwtech.co.uk/g3sek ____________________________________________
/archives//html/Amps/2005-03/msg00255.html (7,554 bytes)

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