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141. Re: [TenTec] Ham Radio Deluxe (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 31 Jan 2009 11:11:37 -0600
Ordinary communications software is much happier if on the 25 pin computer end that pin 4 is connected to 5 (RTS/CTS hardware handshake), and pin 6 is connected to 8 to 20 (Data Terminal Ready hooked
/archives//html/TenTec/2009-01/msg00467.html (11,656 bytes)

142. Re: [TenTec] OT Again: Eico 710 GDO (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 31 Jan 2009 11:15:46 -0600
My guess would include a failed tube, probably a 6AF4 UHF tuner triode, or a broken cable if the power supply is separate from the dipper. Getting into the dipper probably requires removing the screw
/archives//html/TenTec/2009-01/msg00468.html (7,854 bytes)

143. Re: [TenTec] Ham Radio Deluxe (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 31 Jan 2009 13:44:42 -0600
Please read what I said, that you quoted above. "the 25 pin COMPUTER END" The jumpers I suggest are ONLY on the computer end of the cable. I've been using and programming RS-232 ports since about 197
/archives//html/TenTec/2009-01/msg00477.html (14,247 bytes)

144. Re: [TenTec] Ham Radio Deluxe (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 31 Jan 2009 14:01:20 -0600
In software handshaking, it takes a full character time to send STOP! so the chances of loosing data are high unless the device is smart enough to yell HALT! with a couple character spaces in its cha
/archives//html/TenTec/2009-01/msg00478.html (11,188 bytes)

145. Re: [TenTec] Problem with carrier on LSB on my Omni 6+ (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 04 Dec 2008 09:26:52 -0600
And a little bit of hum in the audio like from the microphone hearing a fluorescent light ballast can appear to be carrier. Or worse, an intermittent shield connection on the microphone cable, usuall
/archives//html/TenTec/2008-12/msg00074.html (10,524 bytes)

146. Re: [TenTec] OT Florescent Ballast's (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 08 Dec 2008 16:59:34 -0600
You might have to add a computer power supply line noise filter and a coarse grounded screen (like 1/2" hardware cloth) over the fixture to quiet it. Or an outside yagi for the radio with double shie
/archives//html/TenTec/2008-12/msg00116.html (8,351 bytes)

147. Re: [TenTec] Corsair II & Titan connections (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 09 Dec 2008 19:08:25 -0600
Nah, that's wrong. Key the Corsair. Take out the jumper on the back that connects Key Out to Key In. Hook Key out on the Corsair to Key in on the amp and Key Out on the amp to Key In on the Corsair.
/archives//html/TenTec/2008-12/msg00128.html (9,273 bytes)

148. Re: [TenTec] Corsair II & Titan connections (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 09 Dec 2008 22:10:41 -0600
There are two other outputs on the back of the rig, ext T/R a relay output for controlling a PA and a QSK output that is open collector and I presume a lot faster but without the delay of the relay w
/archives//html/TenTec/2008-12/msg00135.html (9,632 bytes)

149. Re: [TenTec] Corsair II & Titan connections (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 10 Dec 2008 14:34:28 -0600
E-mail attachments are sent using only the printable character set so are recoded in base 64 which makes them take up many more bytes than the binary file. Its most effective to post such a file on a
/archives//html/TenTec/2008-12/msg00143.html (10,827 bytes)

150. Re: [TenTec] Time Sharing Radio Access? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 15 Dec 2008 12:57:13 -0600
Such an operation was described in QST a couple years ago. The Cyclone Amateur Radio Club at ISU set up such an operation a couple years ago, mostly as a senior project. I don't think it continues to
/archives//html/TenTec/2008-12/msg00154.html (10,792 bytes)

151. Re: [TenTec] Time Sharing Radio Access? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 15 Dec 2008 13:25:17 -0600
ICARUS didn't require special user software, just a sound equipped browser as I recall. I never tried to use it, audio on a 28K dial up isn't practical. Besides out here in the country were internet
/archives//html/TenTec/2008-12/msg00156.html (10,088 bytes)

152. Re: [TenTec] Time Sharing Radio Access? (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 16 Dec 2008 11:48:06 -0600
There are existing clubs in the area. More at the military posts, often MARS stations, like at Ft. Belvoir. There were enough operation positions at Ft. Belvoir when I was last there (some 40 years a
/archives//html/TenTec/2008-12/msg00167.html (9,930 bytes)

153. Re: [TenTec] The Titan IIII - 4cx800s (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 19 Dec 2008 11:16:51 -0600
At least in pictures, 4CX400 and 4CX800 had those numbers on the tubes. Though it would not be hard to make a rubber stamp and roll the cooler over it for pictures sake. Maybe use paint instead of st
/archives//html/TenTec/2008-12/msg00228.html (8,244 bytes)

154. Re: [TenTec] RF gain/switch on Corsair (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 22 Dec 2008 13:44:06 -0600
Its probably originally a reverse log, or your replacement is log the original was linear. Try tying a 10K resistor from the hot side of the pot to the wiper, that should invert the taper in a way yo
/archives//html/TenTec/2008-12/msg00284.html (8,156 bytes)

155. Re: [TenTec] O2 vs K3 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 23 Dec 2008 12:07:09 -0600
<SNIP> Noise blankers have been doing that since the first one made by Lamb using vacuum tubes. Chopping holes in strong signals does lead to splatter. 73, Jerry, K0CQ
/archives//html/TenTec/2008-12/msg00294.html (9,056 bytes)

156. Re: [TenTec] Transformer and schematic help needed (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 23 Dec 2008 12:17:24 -0600
So you wish a DC supply that puts out about 2 KV at 3/4 amp DC? That's a lot of power on a 120 volt line, especially figuring the line current waveform won't be nice, but will be peaked from the capa
/archives//html/TenTec/2008-12/msg00295.html (9,372 bytes)

157. Re: [TenTec] Transformer and schematic help needed (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 23 Dec 2008 12:27:52 -0600
Google showed me that P. W. Dahl is now a division of Harbach Electronics and is still producing transformers. 73, Jerry, K0CQ
/archives//html/TenTec/2008-12/msg00296.html (9,965 bytes)

158. Re: [TenTec] Transformer and schematic help needed (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 30 Dec 2008 20:41:50 -0600
SB23B won't do 1500 volts, nor 3/4 amp. Nor will the SB-200 power supply. Not when I have a box with three good 4CX250B in parallel for 6m. I don't need a power supply, Jeff does, and he also has the
/archives//html/TenTec/2008-12/msg00364.html (11,242 bytes)

159. Re: [TenTec] Omni V upgrade (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 31 Dec 2008 14:28:29 -0600
Many a panel has been labeled with india ink either free hand or with a Leroy lettering set (cricket and template). I've found a baked (180 F) covering of clear Rustoleum has made the labels last a l
/archives//html/TenTec/2008-12/msg00368.html (9,262 bytes)

160. Re: [TenTec] 9420 Power Supply - Update (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 01 Nov 2008 22:26:06 -0600
Sounds to me like you have a melted pass transistor. Standard supply failure mode and why there is a crowbar. Check the resistances from collector to emitter. One will be very low. Can't say it could
/archives//html/TenTec/2008-11/msg00013.html (9,382 bytes)

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