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Total 7 documents matching your query.

1. [Amps] stuff forsale! (score: 1): Author: "David Robbins" <k1ttt@verizon.net>; Date: Sun, 14 Oct 2018 10:52:42 -0500; A couple amps, and other stuff... Commander HF-2500 amp s/n 443 = $1200 plus shipping All band this vintage does NOT have grid protection Commander HF-2500 amp s/n 698 = $1200 plus shipping modified; /archives//html/Amps/2018-10/msg00040.html (7,935 bytes)
2. Re: [Amps] stuff forsale! (score: 1): Author: Bill Turner <dezrat@outlook.com>; Date: Sun, 14 Oct 2018 22:45:56 +0000; -- ORIGINAL MESSAGE --(may be snipped) REPLY: Beware of the HF-2500 in its original UNMODIFIED state. The toroid in the output tank WILL NOT handle full RTTY power on 160-40 meters, as I learned twic; /archives//html/Amps/2018-10/msg00045.html (7,656 bytes)
3. Re: [Amps] stuff forsale! (score: 1): Author: "David Robbins" <k1ttt@verizon.net>; Date: Tue, 16 Oct 2018 08:04:37 -0500; They 'might' be ok on 160m, there are no big rtty contests on that band so haven't actually tested one there. The problem with 40m and 80m is due to the shorted turns on the toroid creating lots of h; /archives//html/Amps/2018-10/msg00047.html (9,765 bytes)
4. Re: [Amps] stuff forsale! (score: 1): Author: mark bitterlich <markbitterlich@embarqmail.com>; Date: Sun, 14 Oct 2018 21:17:28 -0400; REPLY: Beware of the HF-2500 in its original UNMODIFIED state. The toroid in the output tank WILL NOT handle full RTTY power on 160-40 meters, as I learned twice. I suggest you ask the seller what t; /archives//html/Amps/2018-10/msg00051.html (9,120 bytes)
5. [Amps] stuff forsale! (score: 1): Author: "Jim Thomson" <jim.thom@telus.net>; Date: Tue, 16 Oct 2018 06:20:42 -0700; <They 'might' be ok on 160m, there are no big rtty contests on that band so <haven't actually tested one there. The problem with 40m and 80m is due to <the shorted turns on the toroid creating lots o; /archives//html/Amps/2018-10/msg00053.html (9,324 bytes)
6. Re: [Amps] stuff forsale! (score: 1): Author: "Peter Voelpel" <dj7ww@t-online.de>; Date: Tue, 16 Oct 2018 20:42:27 +0200; You will need much less cross section for the coil if you build the tank as a Pi-L circuit. With far less RF current trough the coil you get the same or better harmonic suppression. Pi-L is ideal for; /archives//html/Amps/2018-10/msg00056.html (8,751 bytes)
7. Re: [Amps] stuff forsale! (score: 1): Author: Jim W7RY <jimw7ry@gmail.com>; Date: Wed, 17 Oct 2018 22:09:48 -0500; A yc-156 is hardly a compact tube. Why does size matter? STAY AWAY from using toridal inductors for tank circuits. Unless its just for the L coil in a PI-L. Use good ole wire wound coil. #10 or 12 is; /archives//html/Amps/2018-10/msg00064.html (11,056 bytes)

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