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21. Re: [TenTec] Burghardt amateur center (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 22 Aug 2009 13:22:39 -0600
My dad and I ordered Viking Ranger kit from Allied Radio about 1956, it came RR Express and the chassis was bent. Later we found the VFO side shield was folded or drilled backwards which made for dif
/archives//html/TenTec/2009-08/msg00178.html (9,032 bytes)

22. Re: [TenTec] Burghardt amateur center (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 22 Aug 2009 14:40:46 -0600
Actually there is Down East Microwave making transverters (so the HF side has to have FM if that's your interest) as well as Elecraft. Otherwise there is no FM made in the US other than Motorola and
/archives//html/TenTec/2009-08/msg00179.html (10,849 bytes)

23. Re: [TenTec] Burghardt amateur center (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 22 Aug 2009 18:13:38 -0600
I have an IC-211. Icom is not a nice four letter word in this hamshack. I have been pleased with the performance of my FT-857D on VHF for a few years now. Its helped by a CW mechanical filter, might
/archives//html/TenTec/2009-08/msg00182.html (10,594 bytes)

24. Re: [TenTec] OT (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Wed, 26 Aug 2009 20:06:01 -0600
Mouser, Digi-Key, Grainger, McMaster-Carr and Radio Shack also has a few. What lamp is needed? 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesting.co
/archives//html/TenTec/2009-08/msg00212.html (7,120 bytes)

25. Re: [TenTec] OT (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 27 Aug 2009 11:11:21 -0600
Its rather critical to know what lamp is needed. There are at least a thousand possibilities in miniature lamps. The Nye Viking MV VA manual on BAMA doesn't admit there even IS a meter lamp. That tun
/archives//html/TenTec/2009-08/msg00213.html (8,079 bytes)

26. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 29 Aug 2009 09:57:55 -0600
Not at all necessarily. The original post said 97DB/milliwatt, which shows high power sensitivity. Higher impedance will just raise the required voltage, though if the driver has a large series resis
/archives//html/TenTec/2009-08/msg00248.html (9,007 bytes)

27. Re: [TenTec] 238 Tuner Knobs (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sat, 29 Aug 2009 16:59:19 -0600
If they weren't allen, they would be bristol which is splined like torx but sharp cornered not rounded. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@cont
/archives//html/TenTec/2009-08/msg00255.html (7,307 bytes)

28. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 10:48:27 -0600
27 ohms Z with 32 ohm phones cuts the available power by a factor of 4. 6 dB. When the headphones are weak already, that's a serious drop. There might be a need for old fashioned, non tiny inductors
/archives//html/TenTec/2009-08/msg00277.html (11,492 bytes)

29. Re: [TenTec] 610 Has started shipping today (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 10:53:50 -0600
In the services, yes, but with the bandswitched LO as the first oscillator and its inherent instability, the R390 was a new design without the bandswitch in the LO and with all the high frequency osc
/archives//html/TenTec/2009-08/msg00278.html (11,554 bytes)

30. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 11:05:41 -0600
Like a pair of RS 277-1008 or single 55021916 or single 33-118 or others from other sources. The first ones you'd have to make a custom cable, the rest just plug in. A sound card external speaker pow
/archives//html/TenTec/2009-08/msg00279.html (10,170 bytes)

31. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 12:58:55 -0600
True. But in the absence of a firmware fix, a $30 amplifier can solve the problem in a couple days. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesti
/archives//html/TenTec/2009-08/msg00283.html (9,258 bytes)

32. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 12:59:14 -0600
True. But in the absence of a firmware fix, a $30 amplifier can solve the problem in a couple days. 73, Jerry, K0CQ _______________________________________________ TenTec mailing list TenTec@contesti
/archives//html/TenTec/2009-08/msg00284.html (9,630 bytes)

33. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 13:58:41 -0600
Naw, its not that hard. Go to the RS page on line, search for a head phone amplifier and pick from those numbers I gave for a module ready to plug into the head phone jack and ready for the head phon
/archives//html/TenTec/2009-08/msg00286.html (11,024 bytes)

34. Re: [TenTec] 610 Has started shipping today (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Sun, 30 Aug 2009 20:23:33 -0600
Almost. Actually the BC610 was built from HT-4 parts with additions and likely several variations in transformer vendors. The movie referenced here earlier show those difference details very clearly.
/archives//html/TenTec/2009-08/msg00294.html (10,331 bytes)

35. Re: [TenTec] Bandscope for Corsair II (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 31 Aug 2009 16:35:12 -0600
Perhaps a SoftRock coupled to the 9 MHz IF before the first filters, e.g. right after the first mixer. Combination of hardware and software. There are versions of both for that to provide a bandscope
/archives//html/TenTec/2009-08/msg00307.html (7,532 bytes)

36. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Mon, 31 Aug 2009 19:57:58 -0600
Then 27 ohms series resistance isn't a factor. And likely the vintage military headphones have a useful narrow band and maybe even a peak in response about 900 to 1000 Hz useful for CW. Some had an i
/archives//html/TenTec/2009-08/msg00309.html (9,329 bytes)

37. Re: [TenTec] Head-Phone volume in Orion2 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 01 Sep 2009 08:54:08 -0600
Yes it is and was intended. Not so all over. Most rigs have audio responses from 20 or 30 Hz to 20 or more KHz using HIFI audio output chips without band limiting. Then all the post filter amplifiers
/archives//html/TenTec/2009-09/msg00000.html (8,784 bytes)

38. Re: [TenTec] OT (that is Off Topic and Old Timers) BC-610 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Tue, 01 Sep 2009 09:11:46 -0600
I picked up an unknown to me Collins PTO last year at CSVHF. Turns out to be the PTO from a T368. A 70H9 made by Collins but with the model number written on the label by hand. Depends on bias and dr
/archives//html/TenTec/2009-09/msg00001.html (10,582 bytes)

39. Re: [TenTec] Century 21 (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Thu, 03 Sep 2009 23:27:12 -0600
The IF is 9 MHz. The VFO gets mixed with a crystal to produce 19-19.5 then mixed with the 9 MHz VFO IF to produce 10-10.5. 9 will probably leak through and the second harmonic of the VFO can leak thr
/archives//html/TenTec/2009-09/msg00022.html (8,637 bytes)

40. Re: [TenTec] Maintaining the high current Molex connectors (score: 1)
Author: "Dr. Gerald N. Johnson" <geraldj@weather.net>
Date: Fri, 04 Sep 2009 11:52:06 -0600
You may have success reforming the pins for a tighter contact. A drop of DeoxIT from Cramolin can help clean dirty contacts. Pins and shells are available from TenTec parts and Mouser Electronics (ww
/archives//html/TenTec/2009-09/msg00028.html (9,460 bytes)

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