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Total 28 documents matching your query.

21. Re: [Amps] B&W PT2500 (score: 1): Author: <w5cul@sbcglobal.net>; Date: Fri, 26 Aug 2022 23:47:03 -0500; For an input SWR when using a solid state amplifier against a PT2500 Amplifier, why not use something like this? It will provide a 50hom load to the transceiver input regardless of the band exercised; /archives//html/Amps/2022-08/msg00042.html (9,719 bytes)
22. Re: [Amps] B&W PT2500 (score: 1): Author: "Joe Subich, W4TV" <lists@subich.com>; Date: Sat, 27 Aug 2022 09:25:57 -0400; The PT2500 is (I think) 2 x 3-500Z. The gain is already marginal if trying to reach 1500W out with 100W drive. Now, if one were working with ceramic/metal tubes or solid state devices that reach 1500; /archives//html/Amps/2022-08/msg00043.html (9,817 bytes)
23. Re: [Amps] B&W PT2500 (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Sat, 27 Aug 2022 08:22:55 -0600; You are correct - the PT-2500 has a pair of 3-500Z's. It was designed and built in the era when the USA power limit was 1000 watts DC input. Hence, the HV is not high enough for 1500 watts output, re; /archives//html/Amps/2022-08/msg00044.html (12,335 bytes)
24. Re: [Amps] B&W PT2500 (score: 1): Author: gudguyham--- via Amps <amps@contesting.com>; Date: Sat, 27 Aug 2022 14:46:20 +0000 (UTC); The originally designed and manufactured PT2500 was by the company Viewstar in Canada!! They werent bound by the same limits. Even Henry built amps with high power capability running 3-500s at 380; /archives//html/Amps/2022-08/msg00046.html (13,882 bytes)
25. Re: [Amps] B&W PT2500 (score: 1): Author: Fern Rivard via Amps <amps@contesting.com>; Date: Sat, 27 Aug 2022 15:00:26 +0000 (UTC); I've owned both the PT-2500 by Viewstar (pair of 3-500Z) and the rather rare PT-3000 by Viewstar which used a single 8877 tube and both had no difficulty in easily putting out 1500 watts on all bands; /archives//html/Amps/2022-08/msg00049.html (15,374 bytes)
26. Re: [Amps] B&W PT2500 (score: 1): Author: Steve London <n2icarrl@gmail.com>; Date: Sat, 27 Aug 2022 09:51:16 -0600; With the Commander down, this seemed like a good time to fire up the PT-2500A. It's the B&W version. 20 meters: Standby Vp = 3300 volts Loaded Vp = 2800 volts Ig = 250 mA Ip = 760 mA Po = 1180 watts; /archives//html/Amps/2022-08/msg00050.html (16,324 bytes)
27. Re: [Amps] B&W PT2500 (score: 1): Author: Steve <g8gsq72@gmail.com>; Date: Sat, 27 Aug 2022 18:20:27 +0100; For clarification, adding an attenuator doesn't guarantee a 50ohm load to the rig regardless. An attenuator makes VSWR lower, the amount of improvement related to the value of the attenuator. For exa; /archives//html/Amps/2022-08/msg00052.html (9,342 bytes)
28. Re: [Amps] B&W PT2500 (score: 1): Author: Jim W7RY <jimw7ry@gmail.com>; Date: Sat, 27 Aug 2022 21:39:16 -0500; There is something wrong then. All the PT-2500s that I have owned, put out 1500 watts easily with a pair of 3-500s. And the plate voltage was quite a bit higher than yours. As other have said, 3800 V; /archives//html/Amps/2022-08/msg00054.html (20,741 bytes)

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