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1. [AMPS] Grid driven triodes (score: 1): Author: k1ta@earthlink.net (Bob Marston); Date: Wed, 31 Mar 1999 21:34:25 -0800; Hi Rich While it may be FCC-legal the FCC is taking interest in nearby distortion products. It was reported on the ARRL's web page that among the FCC's recent enforcement actions on the high end of 2; /archives//html/Amps/1999-04/msg00001.html (7,835 bytes)
2. [AMPS] Grid driven triodes (score: 1): Author: wlfuqu00@pop.uky.edu (William L. Fuqua III); Date: Tue, 30 Mar 1999 08:34:10 -0500 (EST); Is there anyone on this list using Common Cathode triode amplifiers? Some day after I get current projects completed I want to build a 450TL Push Pull amp. I know there were Short wave broadcast vers; /archives//html/Amps/1999-03/msg00685.html (8,945 bytes)
3. [AMPS] Grid driven triodes (score: 1): Author: W8IK@ibm.net (Joe Subich, W8IK/4); Date: Tue, 30 Mar 1999 09:07:28 -0500; Bill, Check Jim Hawkins' site (http://www.exit109.com/~jimh/radio.shtml). He has stuff on several of the old-time "big iron" stations including VOA (Betany), WLW, etc. The sub-title on the site is:; /archives//html/Amps/1999-03/msg00686.html (8,543 bytes)
4. [AMPS] Grid driven triodes (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 30 Mar 1999 08:03:03 -0800; ? The only kind I know about are Class C. // To build a common-cathode / grid-driven '''Linear''' amplifier, one needs a triode operated in Class AB1. In order to have enough peak anode-current with; /archives//html/Amps/1999-03/msg00687.html (8,229 bytes)
5. [AMPS] Grid driven triodes (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Tue, 30 Mar 1999 17:22:16 +0100; in Not necessarily. There's always Class AB2 with grid current. It needs a well regulated bias supply, and a low impedance drive, but it can be linear if run under the conditions where grid current l; /archives//html/Amps/1999-03/msg00694.html (8,226 bytes)
6. [AMPS] Grid driven triodes (score: 1): Author: measures@vc.net (Rich Measures); Date: Tue, 30 Mar 1999 11:23:06 -0800; ? With the 4CX1500B & 4CX600JX, yes, provided that the grid current does not exceed 0.5mA. Specify a triode for Class AB1 grid-driven linear service, and I'll have a go at it with the appropriate ch; /archives//html/Amps/1999-03/msg00702.html (8,161 bytes)
7. [AMPS] Grid driven triodes (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 31 Mar 1999 09:52:33 +0100; a go at >it with the appropriate characteristic-curves The original question was about using tubes like a 450TL. I figure AB2 is necessary for things like that. Are there triodes specified for AB1 gr; /archives//html/Amps/1999-03/msg00710.html (8,263 bytes)
8. [AMPS] Grid driven triodes (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 31 Mar 1999 02:26:02 -0800; ? Typical total IMD figures for Class AB2 grid-driven service seems to be around minus 20db below pep for ssb voice modulation. Substantial grid-current in grid driven service equals substantial dis; /archives//html/Amps/1999-03/msg00714.html (8,654 bytes)
9. [AMPS] Grid driven triodes (score: 1): Author: wlfuqu00@pop.uky.edu (William L. Fuqua III); Date: Wed, 31 Mar 1999 08:38:01 -0500 (EST); The real problem is that in band switching a common-cathode triode amplifier it is important to keep the output circuit balanced so that neutralization may be maintained. Has anyone seen a band switc; /archives//html/Amps/1999-03/msg00716.html (8,835 bytes)
10. [AMPS] Grid driven triodes (score: 1): Author: Peter_Chadwick@mitel.com (Peter Chadwick); Date: Wed, 31 Mar 1999 14:49:10 +0100; And make damn sure that there's an interlock on the HV so that it REALLY is off and discharged before you go to change that coil - I presume you're not shunt feeding, so the coil will have the full H; /archives//html/Amps/1999-03/msg00717.html (8,165 bytes)
11. [AMPS] Grid driven triodes (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 31 Mar 1999 09:33:41 -0800; ? Bridge-neutralization and an unbalanced Pi tank could provide general coverage Class AB1 operation for a (low-Mu) triode - as it does with tetrodes and pentodes. . See Figure 5 on my Web site. The; /archives//html/Amps/1999-03/msg00720.html (10,444 bytes)
12. [AMPS] Grid driven triodes (score: 1): Author: measures@vc.net (Rich Measures); Date: Wed, 31 Mar 1999 09:33:47 -0800; ? Built-in RF Negative Feedback overcomes the Pandorra's box of nasties brought forth by grid-current. . - cheers, Peter Rich... R. L. Measures, 805-386-3734, AG6K, www.vcnet.com/measures -- FAQ on; /archives//html/Amps/1999-03/msg00721.html (8,196 bytes)

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