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References: [ +from:km1h@jeremy.mv.com: 165 ]

Total 165 documents matching your query.

121. Re: Topband: Field Day Classic 1950s (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Thu, 26 Jun 2014 09:49:47 -0400
Mine was a HQ-129X, Viking I and 122VFO, plus DB-22A preselector for the high bands. This was a 3 station event with HS friends on a high open field in LI NY in 1957. Antennas were various wires on p
/archives//html/Topband/2014-06/msg00210.html (8,495 bytes)

122. Re: Topband: Deployable radials for 80/160M (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Fri, 27 Jun 2014 09:57:45 -0400
Around here that wire gets pretty well corroded after a few years just in the air from acid rain and salt laden fog off the ocean 20-30 miles away. I wonder what that does to the conductivity? OTOH m
/archives//html/Topband/2014-06/msg00226.html (12,451 bytes)

123. Re: Topband: Beverage feedline (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Fri, 27 Jun 2014 10:37:49 -0400
RG-6 with a CCS center conductor is all about the same as far as RF or DC loss is concerned. Figure on .35dB/100' at 2MHz. When I used 750' of RG-6 to feed the RCS-4 Beverage switch 25 years ago I ha
/archives//html/Topband/2014-06/msg00227.html (10,746 bytes)

124. Re: Topband: , Re: Deployable radials for 80/160M (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Fri, 27 Jun 2014 11:16:44 -0400
This area still has a huge amount of electronics related industry. BAE and Raytheon included. When a military contract has been shipped the left overs get scrapped unlike a small commercial or resear
/archives//html/Topband/2014-06/msg00229.html (8,570 bytes)

125. Re: Topband: Topband Digest, Vol 138, Issue 25 (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Mon, 30 Jun 2014 15:25:56 -0400
Well, we both used a piece of rebar but I couldnt find a good tub at the transfer station/town dump. I made mine from scrap angle iron and my trusty Miller MIG welder. Its survived outdoors now since
/archives//html/Topband/2014-06/msg00233.html (47,747 bytes)

126. Re: Topband: Length of Beverages (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sun, 27 Jul 2014 09:05:00 -0400
At a prior home I had a couple of 1200-1500' that heard quite well to the NE and SE on the real long haul DX. When I extended the 1200 to 2200' it became a real dog. Here Ive been content with 500-75
/archives//html/Topband/2014-07/msg00051.html (10,263 bytes)

127. Re: Topband: Length of Beverages (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sun, 27 Jul 2014 19:53:05 -0400
I knew that answer 20 years ago Mike. Perhaps someone has a large Slinky, can count the turns and then give it back to his grandson (-: Using your idea I wonder if a pair could be wound bifilar and u
/archives//html/Topband/2014-07/msg00059.html (9,671 bytes)

128. Re: Topband: Length of Beverages (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Mon, 28 Jul 2014 11:49:34 -0400
Thats where a simple active homebrew combiner could be helpful instead of wasting $600 on a fancy box. When they get down to $200 or someone else duplicates the performance at that price Id be intere
/archives//html/Topband/2014-07/msg00063.html (11,443 bytes)

129. Re: Topband: Length of Beverages (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Mon, 28 Jul 2014 13:54:08 -0400
There is really nothing new to explain. It has been established since the mid 1920's that the Beverage is a slow wave antenna, ie: it has a velocity factor, and at an electrical 50% VF it will revers
/archives//html/Topband/2014-07/msg00066.html (12,995 bytes)

130. Re: Topband: Topband Digest, Vol 139, Issue 20 (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Thu, 31 Jul 2014 20:00:01 -0400
More like a Chevy vs one thats been dolled up a bit for more money (-: Hi Paul.. I have used two Comteks for over 20 years and they have never had a problem. The DXE looks like a very nice unit and i
/archives//html/Topband/2014-07/msg00073.html (9,425 bytes)

131. Re: Topband: Topband Digest, Vol 139, Issue 20 (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Fri, 1 Aug 2014 21:43:34 -0400
No guesswork Tom, sorry to dissapoint; just a little tongue in cheek. For most of us that use seperate receiving antennas the Comtek style is sufficient and is easily duplicated as a homebrew. I have
/archives//html/Topband/2014-08/msg00001.html (14,749 bytes)

132. Re: Topband: Rig Comparisons (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Sat, 2 Aug 2014 19:52:27 -0400
Feedforward, pre distortion, and conventional FB have all been around a long time in the analog world of amplifiers at audio and RF. With digital it has become easier to implement the complex version
/archives//html/Topband/2014-08/msg00008.html (11,500 bytes)

133. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Mon, 4 Aug 2014 22:39:37 -0400
Which cores were that? Maybe they have been doing some comparisons recently since Mouser, Digi-Key, Arrow, etc have been well advertised on many forums. The most overpriced has always been Palomar Ca
/archives//html/Topband/2014-08/msg00029.html (9,142 bytes)

134. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Tue, 5 Aug 2014 09:56:46 -0400
Hmm, $3 each more than Mouser who also is a very fast shipper, usually same day. Mouser Part 623-2631803802 Carl KM1H -- Original Message -- From: <wb6rse1@mac.com> To: "Hugh Valentine" <hsvdds@juno.
/archives//html/Topband/2014-08/msg00030.html (8,996 bytes)

135. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Tue, 5 Aug 2014 11:43:13 -0400
I suggest reading the fine print Ive been buying that part for years and never got a wrong item. Carl KM1H -- Original Message -- From: "Greg" <n4cc@windstream.net> To: "'Carl'" <km1h@jeremy.mv.com>;
/archives//html/Topband/2014-08/msg00032.html (10,537 bytes)

136. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Tue, 5 Aug 2014 16:51:13 -0400
And the ARRL perpetuates this scam with using Amidon part # in all their publications. I still have hundreds of Fair-Rite ferrites and Micrometals powered iron left over from my Radiokit days and hav
/archives//html/Topband/2014-08/msg00046.html (10,735 bytes)

137. Re: Topband: Owner of 4-square antenna near Hammerfest ? (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 6 Aug 2014 08:49:58 -0400
It might be for an AM broadcast station. You should be able to tune it in when driving by as it will be very loud. Another possibility is for the new 600M ham band and the elements are loaded for 475
/archives//html/Topband/2014-08/msg00051.html (8,012 bytes)

138. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 6 Aug 2014 11:31:33 -0400
31 and 43 mix are the popular ones in the 2-30 MHz range for common mode suppression; 31 wins at 160 and 80, but 43 is better in the 7-30 range. Before 31 came along I used 43 even at 160 and observe
/archives//html/Topband/2014-08/msg00053.html (12,856 bytes)

139. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 6 Aug 2014 15:47:40 -0400
You should start selling them on here along with those balun cores. Carl KM1H I would amend that only to say that #31 and #43 are roughly equivalent in the 5-15 MHz, range, #43 is slightly better abo
/archives//html/Topband/2014-08/msg00057.html (11,469 bytes)

140. Re: Topband: Ferrite Cores (score: 1)
Author: "Carl" <km1h@jeremy.mv.com>
Date: Wed, 6 Aug 2014 19:48:28 -0400
I would amend that only to say that #31 and #43 are roughly equivalent in the 5-15 MHz, range, #43 is slightly better above 15 MHz. #43 is a bit less expensive than #31, but the cost difference disap
/archives//html/Topband/2014-08/msg00060.html (11,699 bytes)

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