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1. [TenTec] Herc II and 9420 duty cycle (score: 1): Author: JACrux <G3JAG@patents.freeserve.co.uk>; Date: Mon, 21 Feb 2005 10:27:50 +0000; My 9420 sits under the bench on a couple of wooden rails, just clear of the carpet, in a very confined space. I do not have any added provision for cooling. I have never burnt my feet on it, and the; /archives//html/TenTec/2005-02/msg00557.html (7,352 bytes)
2. Re: [TenTec] Herc II and 9420 duty cycle (score: 1): Author: "Phil Chambley, Sr." <k4dpk@comcast.net>; Date: Mon, 21 Feb 2005 08:01:45 -0500; I think it would be a good idea to check the idling collector current on the finals. Phil K4DPK VFO Stabilizers and PEP adapters for wattmeters...Check out http://home.comcast.net/~k4dpk -- Original; /archives//html/TenTec/2005-02/msg00559.html (8,986 bytes)
3. Re: [TenTec] Herc II and 9420 duty cycle (score: 1): Author: Ken Brown <ken.d.brown@verizon.net>; Date: Mon, 21 Feb 2005 08:52:56 -1000; Hi Phil, Thanks for the suggestion. I see how the currents to the four PA modules is monitored by the voltage drop across the 0.015 ohm resistors on the DC Distribution Board, and then combined toget; /archives//html/TenTec/2005-02/msg00564.html (8,506 bytes)
4. Re: [TenTec] Herc II and 9420 duty cycle (score: 1): Author: Bill NY9H <ny9h@arrl.net>; Date: Mon, 21 Feb 2005 13:20:54 -0600; when i re fitted the outputs on my herc II; I recall my notes calling for bias at .5 A per PAIR... ( 1/2 A per pair) X 4 pair = 2 A ... my Ic meter barely reads anything... i should think it should r; /archives//html/TenTec/2005-02/msg00565.html (8,123 bytes)
5. Re: [TenTec] Herc II and 9420 duty cycle (score: 1): Author: "Phil Chambley, Sr." <k4dpk@comcast.net>; Date: Mon, 21 Feb 2005 14:26:14 -0500; Hi Ken.... Each of the four amplifiers should draw 450-500 ma idling current. If your Ic meter is accurate, then you have found the problem...way too much forward bias. First be sure all four power s; /archives//html/TenTec/2005-02/msg00570.html (10,547 bytes)

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