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261. Re: [TenTec] Dual frequency receive (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Mon, 25 Dec 2006 20:45:16 -0600
I don't remember that the Collins, Drake, or Heathkit allowed simultaneous reception without user mods. The external VFO for some Tentecs like the Corsair II has a switch to allow simultaneous recept
/archives//html/TenTec/2006-12/msg00723.html (9,953 bytes)

262. Re: [TenTec] Dual frequency receive (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Tue, 26 Dec 2006 12:23:41 -0600
In the S-line the BFO were independent. But they were cabled to use the receiver crystals for the HF mixers, and the transmitter selects between using the receiver PTO or the transmitter PTO for tran
/archives//html/TenTec/2006-12/msg00730.html (12,156 bytes)

263. Re: [TenTec] The secret to GREAT audio -- only $3.79! (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 27 Dec 2006 23:24:32 -0600
One really nice thing about the tiny electret microphone is that the diaphragm is so small it remains rigid over the whole audio spectrum and can be very light weight so it makes an almost perfectly
/archives//html/TenTec/2006-12/msg00744.html (7,620 bytes)

264. Re: [TenTec] Corsair II Internal Fuse (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 28 Dec 2006 11:55:43 -0600
Replace the fuse and try it on a matched load. Tentec finals don't have SWR protection. They depend on the fuse or breaker in the power supply to shut the PA down before its damaged by an unfavorable
/archives//html/TenTec/2006-12/msg00751.html (7,745 bytes)

265. Re: [TenTec] calibrator question...argosy I (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 28 Dec 2006 19:03:56 -0600
A perfect square wave is made up of only odd harmonics. 7.000 is an even harmonic. If its marker you want, take that square wave and feed it to one gate of an XOR. Take that same signal delayed throu
/archives//html/TenTec/2006-12/msg00760.html (9,822 bytes)

266. Re: [TenTec] Orion II 8 Pin DIN (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 00:02:07 -0600
I was looking in the Mouser catalog last night and it appeared that the 8 pin plug in the catalog had the 270 degree angle but the center pin was offset .070" towards that gap. Some one on a microwav
/archives//html/TenTec/2006-12/msg00768.html (9,834 bytes)

267. Re: [TenTec] Orion II 8 Pin DIN (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 11:19:05 -0600
I've had all good experiences with Burghardt and only bad with Texas Tower. TT wouldn't take my order because my business phone number and my home phone number are the same. You can view the entire B
/archives//html/TenTec/2006-12/msg00777.html (8,670 bytes)

268. Re: [TenTec] TenTec] TX EQ = -14 dB for PSK31 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 11:36:10 -0600
Reducing the output in a linear transmitter such as a SSB transmitter has the same effect at the PA whether reduced by audio gain, audio input, or reducing a mid stage gain by ALC. And often any redu
/archives//html/TenTec/2006-12/msg00778.html (9,517 bytes)

269. [TenTec] [Fwd: Re: [WSVHF] IN NEED OF TS-2000 CONNECTIRS] (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 13:27:23 -0600
-- Forwarded Message -- _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
/archives//html/TenTec/2006-12/msg00783.html (7,620 bytes)

270. Re: [TenTec] TenTec] TX EQ = -14 dB for PSK31 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 14:48:50 -0600
So the signal level is reduced until the receive S/N is poor. It shouldn't matter whether its that way from low audio gain or a poor propagation path. Only when it makes the receive signal to noise r
/archives//html/TenTec/2006-12/msg00789.html (10,104 bytes)

271. Re: [TenTec] TenTec] TX EQ = -14 dB for PSK31 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 14:52:32 -0600
That's because the ALC is what sets the power output. When you set the power to a lower level that sets the ALC threshold to a lower level. If you keep the gain the same then you have excess drive at
/archives//html/TenTec/2006-12/msg00790.html (9,666 bytes)

272. Re: [TenTec] TX EQ = -14 dB for PSK31 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 18:18:13 -0600
Providing the ALC gain control introduces no phase shifts. With ears being insensitive to absolute phase or even phase differences between harmonic components, there is no need for a voice transmitte
/archives//html/TenTec/2006-12/msg00796.html (8,691 bytes)

273. Re: [TenTec] ALC action on Orion (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 29 Dec 2006 23:11:03 -0600
Nope, the power setting is ALL ALC threshold. Setting it for 50 watts only makes the ALC work more, causing more compression. You have to cut the gain before the ALC to whether its microphone gain or
/archives//html/TenTec/2006-12/msg00815.html (10,016 bytes)

274. Re: [TenTec] PSK-31 and ALC (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 30 Dec 2006 10:57:21 -0600
While the intermod levels with lots of ALC aren't horrible by solid state standards they aren't very good either. Remember the 32S-1 from Collins did at least 10 dB better with tubes 50 years ago. Yo
/archives//html/TenTec/2006-12/msg00826.html (11,160 bytes)

275. Re: [TenTec] Orion Serial Connection Baud Rate (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 30 Dec 2006 17:57:09 -0600
I have a DOS program that runs up to over 200K to do laplink functions on the serial port. Surely that's possible. I've not found my DOS references lately, but I might find them deep down some pile.
/archives//html/TenTec/2006-12/msg00849.html (8,035 bytes)

276. Re: [TenTec] Orion Serial Connection Baud Rate (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sat, 30 Dec 2006 20:03:52 -0600
DOS interrupts only support up to 9600 baud, but the hardware supports faster. The clock divisor is 12 for 9600 baud, so 57600 needs a divisor of 2. Looking at an old DOS programming book you have to
/archives//html/TenTec/2006-12/msg00855.html (8,859 bytes)

277. Re: [TenTec] O-II Thoughts (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Wed, 03 Jan 2007 22:40:22 -0600
I improved the feel of my Corsair II by turning a 2" diameter by nearly an inch thick aluminum knob. Lots more flywheel effect. 73, Jerry, K0CQ _______________________________________________ TenTec
/archives//html/TenTec/2007-01/msg00049.html (11,110 bytes)

278. Re: [TenTec] re Orion II thoughts (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Thu, 04 Jan 2007 13:41:00 -0600
And Omni V, Omni A, B, C, D, Paragon, Corsair I and II, and all vintage Tentec rigs with plug in filters, but not the Scout. How does 1/2 S unit help in most none threshold communications? 73, Jerry,
/archives//html/TenTec/2007-01/msg00069.html (8,656 bytes)

279. Re: [TenTec] re Orion II thoughts (100W/200W), Class A (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Fri, 05 Jan 2007 20:00:38 -0600
The spectrum of that LSB signal 1 KHz higher in frequency includes at least 1.3 KHz below your carrier frequency. E.g. INSIDE your SSB bandwidth. There are few solutions. Switching sidebands and usin
/archives//html/TenTec/2007-01/msg00100.html (9,069 bytes)

280. Re: [TenTec] Triton IV (544) Zero Beat (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@storm.weather.net>
Date: Sun, 07 Jan 2007 13:04:50 -0600
If the zero beat button works like my Corsair II, it shifts the VFO by the 700 Hz or so and you tune the received signal for zero beat, e.g. very low pitch, as low as you can hear. Then you release t
/archives//html/TenTec/2007-01/msg00143.html (8,153 bytes)

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