To: | "Vic K2VCO" <k2vco.vic@gmail.com>, <amps@contesting.com> |
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Subject: | Re: [Amps] Initial RF testing of 4CX1000A amplifier |
From: | "Carl" <km1h@jeremy.mv.com> |
Date: | Tue, 5 Nov 2013 15:34:31 -0500 |
List-post: | <amps@contesting.com">mailto:amps@contesting.com> |
That screen bleed goes back to the 50's or so when tetrodes were more
popular than triodes.
Carl KM1H----- Original Message ----- From: "Vic K2VCO" <k2vco.vic@gmail.com> To: <amps@contesting.com> Sent: Tuesday, November 05, 2013 11:34 AM Subject: Re: [Amps] Initial RF testing of 4CX1000A amplifier My meter reads -10 - 0 - 40. Actually it is a normal meter with a new scale. There is a 10 mA bleed which brings the pointer to zero when there is no screen current. Very clever idea by GM3SEK.I'll be testing with full drive soon. On 11/5/2013 8:23 AM, Bill Turner wrote:ORIGINAL MESSAGE: (may be snipped) On Mon, 04 Nov 2013 21:40:48 -0800, K2VCO wrote:I am not sure the large negative screen current is normal with theseconditions. What do you folks think?REPLY: Negative screen current is normal under conditions of low drive. At full power it should be positive. I highly recommend a zero-center meter for screen current. 73, Bill W6WRT-- Vic, K2VCO Fresno CA http://www.qsl.net/k2vco/ _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps ----- No virus found in this message. Checked by AVG - www.avg.com Version: 10.0.1432 / Virus Database: 3222/6310 - Release Date: 11/05/13 _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps |
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