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Total 7 documents matching your query.

1. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: philk5pc@tyler.net (Phil Clements); Date: Wed, 10 Feb 1999 08:39:47 -0800; I have found that at least mounting the "C2" cap in the 10 meter pi network at the socket accomplishes this nicely. Did not think of mounting the whole 10m network there. Will try it next time. (((7; /archives//html/Amps/1999-02/msg00300.html (8,332 bytes)
2. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: G3SEK@ifwtech.demon.co.uk (Ian White, G3SEK); Date: Wed, 10 Feb 1999 07:45:04 +0000; It seems that the input network is actually providing a reflection for harmonic energy, not a matched termination. So... just speculating... in a multi-band amplifier, would it make sense to wire the; /archives//html/Amps/1999-02/msg00295.html (9,403 bytes)
3. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: amps@txrx.demon.co.uk (Steve Thompson); Date: Tue, 9 Feb 1999 07:29:30 +0000; I'd guess that the phase changes the cable introduces at harmonic frequencies has a lot to do with it. The loss in a foot of RG58 even at 150MHz is small. Steve -- FAQ on WWW: http://www.contesting.c; /archives//html/Amps/1999-02/msg00293.html (8,717 bytes)
4. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 8 Feb 1999 22:53:03 -0600; OK. That makes sense. Hmmm....Could this be another reason why my gain is flat topping on the upper bands? On 10M, my power out is barely 800 watts with anything over 80 watts in. Of course my tank; /archives//html/Amps/1999-02/msg00268.html (9,952 bytes)
5. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: donovanf@erols.com (Frank Donovan W3LPL); Date: Mon, 8 Feb 1999 23:06:21 -0500; Jon, Excellent question! A class B amplifier produces many harmonics as it switches from conducting to non-conducting, and the input tuned circuit must provide an excellent input termination impendan; /archives//html/Amps/1999-02/msg00266.html (10,425 bytes)
6. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: jono@enteract.com (Jon Ogden); Date: Mon, 8 Feb 1999 21:43:22 -0600; Interesting. Why is this? It seems like it could make for a rather crowded tube compartment. The loss of any coax at HF seems minimal, and all that having a transmission line in there would do would; /archives//html/Amps/1999-02/msg00264.html (8,556 bytes)
7. [AMPS] Input Tuned Circuits with Powdered Iron Toroids (score: 1): Author: donovanf@erols.com (Frank Donovan W3LPL); Date: Mon, 8 Feb 1999 22:32:41 -0500; This rainy weekend I decided to replace the old National XR-50 slug tuned coils in the input pi-network tuned circuits of my 25 year-old monoband 3-1000Z amplifiers with powdered iron toroids. The pr; /archives//html/Amps/1999-02/msg00262.html (10,925 bytes)

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