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Total 313 documents matching your query.

201. Re: Topband: Measuring Inductor Q (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sun, 06 Jul 2008 11:24:49 -0700
George, I haven't personally tried this in my lab, but the method (resistive divider technique) appears sound and claims to be good for inductors up to 400: http://www.edn.com/article/CA196485.html G
/archives//html/Topband/2008-07/msg00048.html (8,269 bytes)

202. Re: Topband: FT1000 MKV Filters (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Fri, 25 Jul 2008 12:22:43 -0700
In my noisy suburban QTH, I find that the Inrad 125 Hz 455 KHz filter cascaded with the MK V's 60Hz DSP APF filter makes it easier for me to copy weak CW signals. I think (but I can't prove) that in
/archives//html/Topband/2008-07/msg00092.html (8,131 bytes)

203. Re: Topband: 160 CW (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sat, 04 Oct 2008 11:43:13 -0700
You are probably already doing this, Bruce, but if not I recommend that along with Herb's suggestion you use a memory keyer pre-programmed with as many canned messages as possible so that the amount
/archives//html/Topband/2008-10/msg00023.html (7,730 bytes)

204. Re: Topband: [Topband] Inverted "L" vs." T" (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Thu, 09 Oct 2008 02:09:40 -0700
Thanks for clairfying that, Rick. I also noticed that when modeling the inverted-L compared with a symmetrically top loaded vertical with the same vertical height. This inconsistency between the radi
/archives//html/Topband/2008-10/msg00052.html (9,835 bytes)

205. Re: Topband: CQ Rule Change (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Fri, 28 Nov 2008 15:26:45 -0800
That's the key, Bob. Perhaps the thing to do is to encourage sponorship of zone 3 awards (I think CQ already does this to some extent) and zone 3 top-ten listings for various categories, etc. If CQ d
/archives//html/Topband/2008-11/msg00271.html (8,670 bytes)

206. Re: Topband: UA9MA (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Tue, 02 Dec 2008 09:39:01 -0800
Conditions over the pole must be very good indeed. This morning around 1215 UTC I was able to clearly hear JW5NM on a QSB peak working W5UN and yesterday morning I was able to clearly hear UA9MA on Q
/archives//html/Topband/2008-12/msg00021.html (8,005 bytes)

207. Re: Topband: Recycled ferrites for 160m (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Wed, 21 Jan 2009 11:49:27 -0800
For measuring high series impedance, I recommend that you keep the circuit impedances low. Per the recommendation of K9YC, I would shunt a 50 ohm resistor across the generator output to eliminate unc
/archives//html/Topband/2009-01/msg00218.html (10,132 bytes)

208. Re: Topband: Chemical ground rod treatment to decrease resistance (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Wed, 18 Feb 2009 20:03:17 -0800
Rather than going with any kind of chemical ground, I was wondering if watering the radial field would help? I live in Southern California where (the last few days non-withstanding) it's pretty dry.
/archives//html/Topband/2009-02/msg00106.html (9,515 bytes)

209. Re: Topband: nonlinear attenuation along signal path (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Thu, 19 Feb 2009 13:56:11 -0800
Whenever an expeditions is loud and easy to work I figure they have an antenna seetup close to the saltwater. The ones that are hard to hear (given the same path direction and distance) I always figu
/archives//html/Topband/2009-02/msg00114.html (8,734 bytes)

210. Topband: VK9LA (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Thu, 26 Mar 2009 11:04:08 -0700
Does anyone know what kind of antenna VK9LA has been using on 160 meters the last couple of mornings. Seems that guys on the West Coast with really good ears are hearing and working them, but so far
/archives//html/Topband/2009-03/msg00083.html (6,445 bytes)

211. Re: Topband: VK9LA (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Fri, 27 Mar 2009 05:19:54 -0700
Thanks for the info, Don. I am sorry to hear that the team lost so many amps, but glad to know that they still have some working ones leftover to keep the lowbands cooking. Do you know what transmit
/archives//html/Topband/2009-03/msg00086.html (8,632 bytes)

212. Re: Topband: VK9GMW (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sun, 29 Mar 2009 17:51:15 -0700
At my QTH VK9GMW must have been at least 10 to 20dB stronger than VK9LA (perhaps more). They were Q5 almost continuously with an occasional fade into the noise, whereas I think I heard VK9LA come out
/archives//html/Topband/2009-03/msg00099.html (8,217 bytes)

213. Topband: How Close is Too Close? (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Mon, 30 Mar 2009 05:50:54 -0700
I was looking at a 160 meter operating site which looks really promising. The only downside for this site is that its only about 2 miles from another very active topband station. I realize the degree
/archives//html/Topband/2009-03/msg00100.html (7,060 bytes)

214. Re: Topband: How Close is Too Close? (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Mon, 30 Mar 2009 12:11:25 -0700
Thanks to all for the replies. Great information. Sounds like the answer to my questions is that 2 mile separation can work, but its a dicey proposition (I would have to listen through him to hear Eu
/archives//html/Topband/2009-03/msg00106.html (8,760 bytes)

215. Re: Topband: VISALIA TOP BAND DINNER RECAP (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Tue, 21 Apr 2009 11:22:32 -0700
I concur, Bruce. Excellent work, Steve. BTW, even though I'd be one of the first ones to sit down, I like K5NA's suggestion to have a DXCC stand down. Mike W4EF................. _____________________
/archives//html/Topband/2009-04/msg00065.html (7,261 bytes)

216. Re: Topband: (no subject) (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Thu, 30 Apr 2009 01:19:59 -0700
Hi Bob, I don't quite understand the relationship between SP5EWY's DX results to North America and rich soil on the banks of the Mississippi. Wouldn't good soil around the Mississippi only benefit a
/archives//html/Topband/2009-04/msg00099.html (8,138 bytes)

217. Re: Topband: How do we get more people on Topband? (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sun, 18 Oct 2009 11:34:10 -0700
Alan, I agree that more space is way more better for topband, but if you embrace your inner masochist you can do suprisingly well from a small lot. Here is how I optimized for my 50' x 100' lot in su
/archives//html/Topband/2009-10/msg00203.html (11,313 bytes)

218. Re: Topband: How do we get more people on Topband? (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Sun, 18 Oct 2009 12:05:51 -0700
BTW, Alan, I should add that the best encouragement that folks like yourself who are blessed with a better than average locations can provide is to be active on the band. It is folks like yourself on
/archives//html/Topband/2009-10/msg00204.html (10,487 bytes)

219. Re: Topband: [Fwd: Re: K4M on TopBand] (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Tue, 20 Oct 2009 23:57:15 -0700
Gary, I know a lot of folks (including myself) were disappointed with the results of the FR/G operation, but in their defense I understand that they were saddled by the military on FR/G with some pre
/archives//html/Topband/2009-10/msg00248.html (9,856 bytes)

220. Re: Topband: AAARRRAAGH ##$!@@!! (score: 1)
Author: Michael Tope <W4EF@dellroy.com>
Date: Wed, 04 Nov 2009 16:04:16 -0800
That is a pretty good theory, Alan. When you consider the spectrum of bad behavior that mean drunks are capable of perpetrating, pushing down on a straight key for 5 minutes is pretty light stuff (no
/archives//html/Topband/2009-11/msg00142.html (9,407 bytes)

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