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Total 9 documents matching your query.

1. [TenTec] AMP Question (score: 1)
Author: Robert & Linda McGraw K4TAX <RMcGraw@blomand.net>
Date: Thu, 21 Aug 2003 16:44:45 -0500
While running a Tentec Centurion at about 275 watts carrier output, the DC input is some 2800 volts at about 300 ma plate current or about 840 watts or so input. I notice that the 3-500Z's show very
/archives//html/TenTec/2003-08/msg00463.html (7,736 bytes)

2. Re: [TenTec] AMP Question (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Thu, 21 Aug 2003 16:11:13 -0500
Have you tuned for maximum out or for plate and grid currents? The plate and grid meters of a grounded grid amplifier can mislead you a great deal when tuning. Its far more effective to tune for maxi
/archives//html/TenTec/2003-08/msg00466.html (8,803 bytes)

3. Re: [TenTec] AMP Question (score: 1)
Author: Robert & Linda McGraw K4TAX <RMcGraw@blomand.net>
Date: Thu, 21 Aug 2003 17:39:42 -0500
Jerry: Thank for the reply. Actually I tune the amp initially with about 5 watts of drive from the exciter then increase the drive to the point grid current approaches the red line of 130 ma (2 tubes
/archives//html/TenTec/2003-08/msg00467.html (10,844 bytes)

4. Re: [TenTec] AMP Question (score: 1)
Author: "Mike Hyder --N4NT--" <N4NT_Mike.Hyder@charter.net>
Date: Thu, 21 Aug 2003 19:08:41 -0400
I don't believe you have sufficient grid current. The grids of 3-500z tubes when the tube is cathode driven normally draw 108 mAdc each. That is 216 mAdc for a pair. Where did the 130 ma red line com
/archives//html/TenTec/2003-08/msg00468.html (12,267 bytes)

5. Re: [TenTec] AMP Question (score: 1)
Author: "Dr. Gerald N. Johnson, electrical engineer" <geraldj@isunet.net>
Date: Thu, 21 Aug 2003 17:58:20 -0500
If there's more plate color there's more plate dissipation. Less output, or more plate input. As if the load Z to the tubes isn't the same on 40 as it is on the lower bands. The tubes do have some in
/archives//html/TenTec/2003-08/msg00469.html (7,949 bytes)

6. Re: [TenTec] AMP Question (score: 1)
Author: Robert & Linda McGraw K4TAX <RMcGraw@blomand.net>
Date: Thu, 21 Aug 2003 22:29:32 -0500
Correction on the gird current. I mis-stated the numbers. It is 260 ma under CW conditions and 130 ma under SSB conditions. Data is taken from the Tentec operation manual for the Centurion. 73 Bob, K
/archives//html/TenTec/2003-08/msg00479.html (13,842 bytes)

7. RE: [TenTec] AMP Question (score: 1)
Author: "RON ZOND" <K3MIY@csonline.net>
Date: Fri, 22 Aug 2003 09:40:07 -0400
HiBob Did you check the bias current on the tubes? Ron K3MIY --Original Message-- From: tentec-bounces@contesting.com [mailto:tentec-bounces@contesting.com]On Behalf Of Robert & Linda McGraw K4TAX Se
/archives//html/TenTec/2003-08/msg00481.html (8,683 bytes)

8. [TenTec] Amp question (score: 1)
Author: "Rob Atkinson, K5UJ" <k5uj@hotmail.com>
Date: Fri, 22 Aug 2003 14:16:20 +0000
Hi Bob, I'm curious about what mode you are operating where you drive the amp to get 275 watts out. I'm guessing it must be either cw or AM with a carrier? anyway, as Jerry said, just tune it for max
/archives//html/TenTec/2003-08/msg00483.html (8,541 bytes)

9. Re: [TenTec] Amp question (score: 1)
Author: Robert & Linda McGraw K4TAX <RMcGraw@blomand.net>
Date: Sat, 23 Aug 2003 06:29:33 -0500
Rob: I use the Tentec Paragon in the TUNE mode for my initial tune-up source because it has variable output from about 1 watt to slightly over 100 watts. As to the 15 watt level, well that comes from
/archives//html/TenTec/2003-08/msg00508.html (10,609 bytes)

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