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Total 1173 documents matching your query.

161. Re: [TenTec] Paragon II RS-232 noise (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Fri, 23 Jan 2009 10:28:22 -0800
I'd bet on a "pin 1 problem" at one or both ends of the cable. Study http://audiosystemsgroup.com/RFI-Ham.pdf especially "Solving Problems in the Shack" and the K9YC serial cable. Also look at the si
/archives//html/TenTec/2009-01/msg00306.html (8,419 bytes)

162. [TenTec] Ten Tec Power Connectors (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 26 Jan 2009 17:16:24 -0800
The white multi-pin rectangular connectors used by Ten Tec for power on their radios during the 70s and 80s are Molex connectors. They come in several sizes. You buy the white housings and the pins s
/archives//html/TenTec/2009-01/msg00333.html (8,000 bytes)

163. Re: [TenTec] Omni VI Mod 3 and RTTY (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Tue, 27 Jan 2009 09:58:04 -0800
This tutorial tells you how to do it easily. http://audiosystemsgroup.com/HamInterfacing.pdf 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com htt
/archives//html/TenTec/2009-01/msg00352.html (9,412 bytes)

164. Re: [TenTec] Omni VI Mod 3 and RTTY (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Tue, 27 Jan 2009 21:13:08 -0800
If the radio and computer are bonded as described, no isolation is needed. The bonding reduces the voltage between them to a few uV. And even if they aren't bonded, the connection of the signal retur
/archives//html/TenTec/2009-01/msg00384.html (9,612 bytes)

165. Re: [TenTec] Ham Radio Deluxe (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Sat, 31 Jan 2009 08:46:53 -0800
The serial cable should be wired straight through. That is, TXD to TXD, RXD to RXD. Common to common. That's all you need. 73, Jim K9YC _______________________________________________ TenTec mailing
/archives//html/TenTec/2009-01/msg00466.html (8,372 bytes)

166. Re: [TenTec] Inrad filters (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Thu, 05 Feb 2009 22:27:33 -0800
The narrower Inrads have a lot of loss. It's specified on their data sheets. The only thing about that that's ever bothered me is that it causes the S-meter in my TS850 to read lower than it otherwis
/archives//html/TenTec/2009-02/msg00122.html (7,333 bytes)

167. Re: [TenTec] Ig drift on Titan 425 (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Fri, 06 Feb 2009 14:01:15 -0800
There are two potential issues. First, temperature sensitive components, especially capacitors, in the amplifier and antenna system can cause the tuning to change after you've been transmitting for a
/archives//html/TenTec/2009-02/msg00129.html (8,488 bytes)

168. Re: [TenTec] Titan 425 transformer output (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Fri, 06 Feb 2009 14:04:59 -0800
http://audiosystemsgroup.com/TitanPS.pdf http://audiosystemsgroup.com/publish also has most of the schematic of the RF deck. 73, Jim K9YC _______________________________________________ TenTec mailin
/archives//html/TenTec/2009-02/msg00130.html (7,604 bytes)

169. Re: [TenTec] Ig drift on Titan 425 (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Sat, 07 Feb 2009 11:44:34 -0800
Are you using AGC to control the drive level? You should NOT do that. Ten Tec makes a point of this in their manual. ALWAYS set the drive level using the power output control of the transceiver that
/archives//html/TenTec/2009-02/msg00141.html (8,297 bytes)

170. Re: [TenTec] Ig drift on amps (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Sat, 07 Feb 2009 14:49:07 -0800
Ten Tec uses N1500 caps in the 229 and 238 tuners. Some matching conditions cause these caps to carry a lot of current, enough to cause them to change value by a fair amount. There are also matching
/archives//html/TenTec/2009-02/msg00148.html (8,155 bytes)

171. Re: [TenTec] All your problems can be solved (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 23 Feb 2009 12:11:41 -0800
Me too -- while I own five Ten Tec amps, I just sold my Omni V (bought used) and haven't bought a new Ten Tec product since 1980. Elecraft has eaten their lunch! Elecraft has issued HARDWARE upgrades
/archives//html/TenTec/2009-02/msg00327.html (8,482 bytes)

172. Re: [TenTec] Grass not always greener (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Mon, 23 Feb 2009 12:32:39 -0800
The people complaining don't know how to use a radio on CW, they don't know how to set RF gain on a radio, and they don't know the difference between AGC pumping and desense. Desense occurs when a ga
/archives//html/TenTec/2009-02/msg00328.html (8,750 bytes)

173. Re: [TenTec] 422 HF Amp Input Low Pass Filter Board question (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Tue, 24 Feb 2009 21:56:57 -0800
Sure -- provide some stimulus to the economy! That's the only good reason to do it. Every Ten Tec amp I've ever seen will get to full power (or close to it) with less than 50W drive, and I typically
/archives//html/TenTec/2009-02/msg00363.html (7,649 bytes)

174. Re: [TenTec] 422 HF Amp Input Low Pass Filter Board question (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 25 Feb 2009 11:21:24 -0800
Thanks Mike. 73, Jim K9YC _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.contesting.com/mailman/listinfo/tentec
/archives//html/TenTec/2009-02/msg00374.html (8,355 bytes)

175. Re: [TenTec] Problem on 160 meters, Whats up? (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 18 Mar 2009 08:20:52 -0700
That is a VERY VERY VERY good idea. I have done that in two locations, and it works spectacularly well. You WILL need radials, the more the merrier, length not critical, more is better. You're having
/archives//html/TenTec/2009-03/msg00325.html (8,579 bytes)

176. Re: [TenTec] Problem on 160 meters, Whats up? (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 18 Mar 2009 08:25:33 -0700
Yes, very likely. There are several very different things called baluns. The one in antenna tuners is a transformer, so 100% of the transmitted power is in the core. Very likely to saturate with high
/archives//html/TenTec/2009-03/msg00327.html (8,725 bytes)

177. Re: [TenTec] Problem on 160 meters, Whats up? (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 18 Mar 2009 10:04:34 -0700
That's great advice, but don't confuse things by calling these conductors a "ground system." It is NOT! This SYSTEM is a counterpoise for the antenna, and it is a return for E/M field that the antenn
/archives//html/TenTec/2009-03/msg00330.html (9,262 bytes)

178. Re: [TenTec] Problem on 160 meters, Whats up? (score: 1)
Author: "Jim Brown K9YC" <k9yc@audiosystemsgroup.com>
Date: Wed, 18 Mar 2009 13:53:26 -0700
Saturation is VERY unlikely in a coaxial choke if the choking impedance is high enough, because the core sees ONLY the common mode component. It sees NONE of the differential field -- it's all confin
/archives//html/TenTec/2009-03/msg00333.html (10,572 bytes)

179. Re: [TenTec] Problem on 160 meters, Whats up? (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Wed, 18 Mar 2009 18:54:30 -0700
Heating in a common mode choke (current balun) has NOTHING to do with SWR, it's all about antenna BALANCE, the common mode voltage across the choke, and the choking impedance. If the choking impedanc
/archives//html/TenTec/2009-03/msg00341.html (8,997 bytes)

180. Re: [TenTec] mic for OII (score: 1)
Author: Jim Brown <k9yc@audiosystemsgroup.com>
Date: Fri, 20 Mar 2009 22:44:29 -0700
The ElectroVoice RE11, 16, 18, 20, and 27 and the AKG D222 and D224 are excellent choices. All are professional dynamic mics, and all are available on the used market at good prices. Several major ad
/archives//html/TenTec/2009-03/msg00374.html (8,035 bytes)

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