- 21. Re: [TenTec] receiver isolation (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 6 Dec 2017 09:24:41 -1000
- There should never be "legal limit" power level on any transceiver antenna port. The maximum power level should be the transceiver's transmit power, and it should only be on the tx/rx port when trans
- /archives//html/TenTec/2017-12/msg00018.html (8,241 bytes)
- 22. Re: [TenTec] receiver isolation (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 6 Dec 2017 21:16:31 -1000
- It all depends on the coupling between the antennas. I should really say antenna systems, because there could be crosstalk between transmission lines or other equipment, and not just the coupling fro
- /archives//html/TenTec/2017-12/msg00023.html (12,580 bytes)
- 23. Re: [TenTec] Cleaning Tentec switches (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 21 Jan 2018 10:52:16 -1000
- I had not heard a Ten-Tec recommendation against DeOxit before. I use it on connectors in my Omni VI and Paragon. Also on potentiometers and switches. Never on PCB trace pushbuttons though. What kind
- /archives//html/TenTec/2018-01/msg00057.html (9,119 bytes)
- 24. Re: [TenTec] Paragon 585 (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Fri, 2 Feb 2018 11:51:31 -1000
- I have found that LED replacements for bayonet based lamps tend to be somewhat directional. The light does not diffuse as evenly as from a filament lamp. Maybe newer ons have improved on this. It is
- /archives//html/TenTec/2018-02/msg00010.html (8,139 bytes)
- 25. Re: [TenTec] Omni - C Finals (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 11 Feb 2018 10:47:58 -1000
- Until you connect it to an RF wattmeter and a 50 Ohm termination (dummy load) everything is just guess work. The MFJ tuner may have a semi-accurate forward power indicator. If you had logged the read
- /archives//html/TenTec/2018-02/msg00086.html (9,506 bytes)
- 26. Re: [TenTec] Omni VI display (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 25 Feb 2018 08:30:45 -1000
- Try reflowing the solder on pcb to connector pins. Maybe one of them is cold solder joint. _______________________________________________ TenTec mailing list TenTec@contesting.com http://lists.conte
- /archives//html/TenTec/2018-02/msg00137.html (8,013 bytes)
- 27. Re: [TenTec] 1999 Centurion amplifier - grid goes negative/output goes to zero (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Fri, 9 Mar 2018 10:56:34 -1000
- Don't do that for a long time. The output matching network is designed for the plate impedance of two tubes in parallel, which is one half the impedance of only one tube. The variable capacitors in t
- /archives//html/TenTec/2018-03/msg00068.html (11,015 bytes)
- 28. Re: [TenTec] Omni VI+ 100 hz off exactly on readout (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Mon, 12 Mar 2018 13:20:25 -1000
- The 10 Mhz reference oscillator (the TCXO you just replaced) and the BFO both have to be set correctly. There are several BFO adjustments and some of them interact with each other. So you may have to
- /archives//html/TenTec/2018-03/msg00092.html (9,736 bytes)
- 29. Re: [TenTec] Omni VI Plus freq Adj (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Mon, 7 May 2018 10:19:45 -1000
- The band select oscillators are supposed to be locked to the 20 MHz reference oscillator. In that case changes from band to band in offset from correct frequency could only occur if the reference osc
- /archives//html/TenTec/2018-05/msg00025.html (9,824 bytes)
- 30. Re: [TenTec] Omni V (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sat, 16 Jun 2018 09:10:48 -1000
- What you really want to know is whether the receiver is performing properly. I wouldn't mess with the S meter adjustments until I had a better confidence that the gain from the RF input to the place
- /archives//html/TenTec/2018-06/msg00042.html (10,318 bytes)
- 31. Re: [TenTec] Omni6 intermittent fault (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 24 Jun 2018 08:37:25 -1000
- Don't know whether you can get Caig products shipped to EU. Pretty sure you will find them on Amazon. You may also find musical instrument stores (that sell electric guitars) carry it. The Caig Labor
- /archives//html/TenTec/2018-06/msg00077.html (12,024 bytes)
- 32. Re: [TenTec] Switch problem (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Tue, 26 Jun 2018 08:40:39 -1000
- I believe the switch on the power supply actually switches the AC primary power. In that case the switch needs to be rated for 250 VAC and appropriate current. The switch on the radio controls a rela
- /archives//html/TenTec/2018-06/msg00084.html (8,658 bytes)
- 33. Re: [TenTec] Omni VI frequency jumping/drifting (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Thu, 28 Jun 2018 07:11:10 -0700
- If you have a stable general coverage receiver you can listen to each of the oscillators to see which one is drifting. May have to experiment with methods of getting a sample of each oscillator to th
- /archives//html/TenTec/2018-06/msg00101.html (11,213 bytes)
- 34. Re: [TenTec] Help needed with Omni VI-op 3 (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 4 Jul 2018 10:09:47 -0600
- My first guess is a noisy local oscillator. Phase noise in the LO PLL system. Since it happens on all bands I would look at parts of the LO system that common to all bands. The 5 to 5.5 MHz VFO maybe
- /archives//html/TenTec/2018-07/msg00006.html (8,140 bytes)
- 35. Re: [TenTec] Replacement Speaker Herules II (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 29 Jul 2018 07:48:38 -1000
- My Hercules II does not have a speaker. What have I been missing? Does the Hercules talk? Complain about high VSWR or unbalanced currents to the PA modules? DE N6KB __________________________________
- /archives//html/TenTec/2018-07/msg00120.html (7,558 bytes)
- 36. Re: [TenTec] Replacement Speaker Herules II (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Sun, 29 Jul 2018 08:16:57 -1000
- I guess I'll have to take a closer look at my Hercules II. Maybe it does have a speaker and I've just never used it. I've never had a RF power amplifier what had a speaker and never thought of it. 73
- /archives//html/TenTec/2018-07/msg00123.html (10,117 bytes)
- 37. Re: [TenTec] centurion (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 8 Aug 2018 18:47:15 -1000
- There are about two possible reasons a good tube will draw excessive current when it has no drive. 1) The bias is wrong. 2) There is an oscillation. Even "Zero Bias" Triodes have circuitry that estab
- /archives//html/TenTec/2018-08/msg00083.html (12,354 bytes)
- 38. Re: [TenTec] omni 6 front end board (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 12 Sep 2018 10:23:36 -1000
- I'm not finding the part number for U1. I do not see it as suspect for a RX sensitivity issue, since the documentation says it is an active mixer circuit used in transmit mode. If the T/R mode switch
- /archives//html/TenTec/2018-09/msg00042.html (8,154 bytes)
- 39. Re: [TenTec] Issues aligning Omni 6+ (Mod. 564) FM TX carrier frequency (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Tue, 6 Nov 2018 08:45:08 -1000
- I have Operators Manuals for the 563, Omni VI, NOT Omni VI+. The BFO adjustments in the 563 are all variable capacitors, not variable inductors. C12, C13, C16 and C18 are the variable capacitors to a
- /archives//html/TenTec/2018-11/msg00015.html (10,251 bytes)
- 40. Re: [TenTec] Omni VI + hear when muted (score: 1)
- Author: Ken Brown <kenradiobrown@gmail.com>
- Date: Wed, 28 Nov 2018 10:15:39 -1000
- I have sometimes noticed small sounds when wearing headphones that I never heard from the speaker. _______________________________________________ TenTec mailing list TenTec@contesting.com http://lis
- /archives//html/TenTec/2018-11/msg00088.html (8,402 bytes)
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