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161. Re: [TenTec] DSP units (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 30 Apr 2003 09:23:37 -0500
There have been several editions of the Timewave software. The latest one is distinctly better than the earlier versions in noise reduction and AGC. I find that sometimes the noise reduction and impr
/archives//html/TenTec/2003-04/msg00837.html (8,625 bytes)

162. Re: [TenTec] Group replies vs. personal e-mail (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 05 Mar 2003 16:28:45 -0600
Before January 27 or 28, the list didn't have the "REPLY-TO" entry. It was down due to server glitches for about three days and came back with REPLY-TO enabled. The list monitor has chosen to not cha
/archives//html/TenTec/2003-03/msg00184.html (9,780 bytes)

163. Re: [TenTec] Century 21 Sticky Controls (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 09 Mar 2003 20:51:56 -0600
A drop of Labelle #108, lubricant for plastic model trains, usually fixes up any stick plastic switches for me, including keyboards. It should be in your nearest hobby shop. 73, Jerry, K0CQ -- Entire
/archives//html/TenTec/2003-03/msg00381.html (8,245 bytes)

164. Re: [TenTec] Corsair DC connector (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 09 Mar 2003 20:51:59 -0600
The Tentec 4 pin connector is a Molex MateNLock. Under a couple bucks from Mouser (www.mouser.com), pins and cord anchor separate. There are a couple variations; either will work. I have the part num
/archives//html/TenTec/2003-03/msg00382.html (7,361 bytes)

165. Re: [TenTec] More IP3 Stuff (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Mon, 10 Mar 2003 23:29:10 -0600
To the contrary: 1) Measuring IP3 is a good indication of how a receiver handles strong interfering adjacent frequency signals. Checking at a variety of spacings can show up more receiver design faul
/archives//html/TenTec/2003-03/msg00468.html (9,115 bytes)

166. Re: [TenTec] Airpax breaker (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 11 Mar 2003 23:28:46 -0600
I use a 16 amp large blade size automotive fuse to protect my Corsair II. So far I've blown two or three, no PA transistors. I built a relay into my power cord for reverse polarity protection and for
/archives//html/TenTec/2003-03/msg00496.html (8,720 bytes)

167. Re: [TenTec] AGC thump (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 12 Mar 2003 10:49:44 -0600
The Corsair AGC is created at audio and I think after the notch and bandpass filters. Those plus the many poles of cascaded crystal filter add up to a great amount of delay. So by the time the AGC vo
/archives//html/TenTec/2003-03/msg00504.html (8,063 bytes)

168. Re: [TenTec] Astatic D104 mic and Pegasus (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Wed, 12 Mar 2003 14:44:41 -0600
The crystal D-104 needs a very high (> half meg) input resistance else it gives a weird frequency response. That's accomplished by the preamp. If the preamp has too much output, then a step down tran
/archives//html/TenTec/2003-03/msg00512.html (8,320 bytes)

169. Re: [TenTec] Scout headphones (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Fri, 14 Mar 2003 19:13:43 -0600
When there's too much audio in headphones, try a resistor in series with the phones. Say 10 times the impedance rating of the headphones as a start. If that's still too loud go higher by another fact
/archives//html/TenTec/2003-03/msg00577.html (7,970 bytes)

170. Re: [TenTec] Equinox Day (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sat, 15 Mar 2003 17:20:22 -0600
I've done several sunrise/sunset programs. Refraction is a significant factor and a source of significant uncertainty. The best of the astronomical computation references that I've found says that co
/archives//html/TenTec/2003-03/msg00620.html (10,297 bytes)

171. Re: [TenTec] Equinox Day (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 16 Mar 2003 10:14:20 -0600
I think my software is looking at the upper limb appearing at sunset and disappearing at sunset. I tested mostly sunset, since sunrise is when I sleep best. Still the greatest uncertainty is from the
/archives//html/TenTec/2003-03/msg00648.html (8,785 bytes)

172. Re: [TenTec] Omni VI & Titan tuning repeatability (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 16 Mar 2003 19:30:02 -0600
The plate blocking capacitors should be the least effect at 160 meters because the tube plate C is far less than the tuning C. At 10 meters the tube plate C is a large fraction of the circuit tuning
/archives//html/TenTec/2003-03/msg00668.html (9,499 bytes)

173. Re: [TenTec] Corsair II going deaf! (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 18 Mar 2003 15:36:03 -0600
Like Brian says, most likely the antenna switch on the back. I suspect that if you just touch it the receiver will either get totally deaf or come alive. Needs a drop of Deoxit. Otherwise, check the
/archives//html/TenTec/2003-03/msg00718.html (8,191 bytes)

174. Re: [TenTec] Corsair II going deaf! (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 18 Mar 2003 16:42:02 -0600
The Corsair II has a switch to allow using a separate receive antenna. It is prone to getting oxidized and not making good contact. All other TR switching is solid state. There could be a bad cable c
/archives//html/TenTec/2003-03/msg00721.html (8,308 bytes)

175. Re: [TenTec] virus ?? (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 18 Mar 2003 21:30:38 -0600
The recent virus spoof originating addresses so what you see is probably not where they came from. Careful digging in the detailed headers can sometimes discover at least what server they came from,
/archives//html/TenTec/2003-03/msg00729.html (8,572 bytes)

176. Re: [TenTec] Amateur radio for home security? (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 23 Mar 2003 17:45:02 -0600
That's a really fuzzy area. Automated equipment on 2m must be controlled on a higher band, things like repeaters can't be controlled entirely on 2m. So a higher band, 440 or 902 would be more appropr
/archives//html/TenTec/2003-03/msg00811.html (9,358 bytes)

177. Re: [TenTec] Omni VI+ and Corsair II receive (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 02 Feb 2003 15:53:26 -0600
The tunable oscillator of the Omni V and VI is synthesized, at VHF, then divided down to reduce the phase noise from its PLL. Then it uses crystal mixing for the various bands. 73, Jerry, K0CQ -- Ent
/archives//html/TenTec/2003-02/msg00065.html (8,005 bytes)

178. Re: [TenTec] Argosy - Help - one dead band (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Sun, 02 Feb 2003 19:32:52 -0600
Microdrops of DeOxit on the contacts, not spray to soak the wafers. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.
/archives//html/TenTec/2003-02/msg00083.html (7,684 bytes)

179. Re: [TenTec] Argosy & Omni woes (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 04 Feb 2003 01:04:37 -0600
Mouser. www.mouser.com Digi-Key www.digikey.com. 73, Jerry, K0CQ -- Entire content copyright Dr. Gerald N. Johnson, electrical engineer. Reproduction by permission only.
/archives//html/TenTec/2003-02/msg00151.html (7,258 bytes)

180. Re: [TenTec] Sorry for my post (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Tue, 04 Feb 2003 11:10:36 -0600
This reflector is set up with a REPLY-TO which overrides anything a browser can do and so all replies go only to the reflector. To reply to an individual off list, one must manually copy and past tha
/archives//html/TenTec/2003-02/msg00171.html (9,276 bytes)

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