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Total 4 documents matching your query.

1. Re: [VHFcontesting] [Moon-Net] Bob Sutherland 3CX1000A7 VHF Amplifier (score: 1): Author: "Ron Rogers" <ww8rr@charter.net>; Date: Mon, 8 Feb 2021 12:27:55 -0500; Not to mention that the 3CX1000a7 tube requires 5 volts at 50 amps just to light the filament..same as a pair of 3-500Zs. That's 250 watts consumed by the tube just to get it to "light up". And Terry; /archives//html/VHFcontesting/2021-02/msg00036.html (11,367 bytes)
2. Re: [VHFcontesting] [Moon-Net] Bob Sutherland 3CX1000A7 VHF Amplifier (score: 1): Author: Terry Price <terry@directivesystems.com>; Date: Mon, 8 Feb 2021 12:59:29 -0500; Actually, 5V @ 30A same as a pair of 3-500z's which are 15A each. I used a filament transformer from a SB220 to light my 3CX1000A7 160m amp. Any of the SK-800 series sockets can be modified to remove; /archives//html/VHFcontesting/2021-02/msg00037.html (14,399 bytes)
3. Re: [VHFcontesting] [Moon-Net] Bob Sutherland 3CX1000A7 VHF Amplifier (score: 1): Author: Ron <ww8rr@charter.net>; Date: Mon, 08 Feb 2021 13:20:35 -0500; Oooops....yes, 5V at 30A....another Senior moment!My 1970s 6M amp that served us well at W8VP, W9ICE, and a couple outings at W4NH is still perking along off of a Drake L4B supply.RonFrom my Samsung; /archives//html/VHFcontesting/2021-02/msg00038.html (13,066 bytes)
4. Re: [VHFcontesting] [Moon-Net] Bob Sutherland 3CX1000A7 VHF Amplifier (score: 1): Author: Bill Olson <callbill@hotmail.com>; Date: Mon, 8 Feb 2021 21:05:24 +0000; My first big tube amp on 2M was a 5CX1500B. I put it in a W6PO tank circuit, grounded catrhode.... that baby DID take 40 amps at 5v on the filament.. And of course, a screen supply and a 50# fil xfrm; /archives//html/VHFcontesting/2021-02/msg00040.html (17,338 bytes)

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