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1. [Amps] 833A GG (score: 1): Author: "Hsu" <hsu4qro@gmail.com>; Date: Mon, 26 Jan 2015 14:13:55 +0800; Anyone have experience about 833 works on GG configurtion?Is it can work 10 mtrs?I just contact with the manufacturer, the factory new tube graphite anode,only $50/ea, ,dirt cheap Hsu _______________; /archives//html/Amps/2015-01/msg00290.html (7,328 bytes)
2. Re: [Amps] 833A GG (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Mon, 26 Jan 2015 07:38:45 +0000; Oddly enough, the 833A has a greater plate to cathode capacitance than plate to grid. The grid does not offer much shielding between the plate and cathode. You would probably have to neutralize it no; /archives//html/Amps/2015-01/msg00291.html (8,053 bytes)
3. Re: [Amps] 833A GG (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 26 Jan 2015 03:01:20 -0600; Not recommended for GG on ANY band.. Not enough gain, for one thing; it would take several hundred watts of drive power to obtain the legal limit. Another issue is that the feedback capacitance is qu; /archives//html/Amps/2015-01/msg00292.html (8,317 bytes)
4. Re: [Amps] 833A GG (score: 1): Author: "Hsu" <hsu4qro@gmail.com>; Date: Mon, 26 Jan 2015 17:09:17 +0800; Yes I just downloaded the 833A's datasheet, Yes the plate to filament capacitance is 8.5P! too much!Yes, I see, It is a challenge to use it built an amplifier. Thanks Bill! Hsu Oddly enough, the 833A; /archives//html/Amps/2015-01/msg00293.html (8,939 bytes)
5. Re: [Amps] 833A GG (score: 1): Author: "Hsu" <hsu4qro@gmail.com>; Date: Mon, 26 Jan 2015 18:44:51 +0800; Hi Mike, Thanks for your very good and useful information. Yes, you are right.I'll not think off this tube. 833C's manufacturer nearby my home( 300 mtrs apart!) They made 3-500Z too, in past two year; /archives//html/Amps/2015-01/msg00294.html (10,116 bytes)
6. Re: [Amps] 833A GG (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Mon, 26 Jan 2015 15:46:01 +0000; You know, I ran a pair of 250THs grounded grid back in the 60's driven by a pair of 6146Bs at 1kW plate input power. That was before I knew that you could not do it. I wonder if it I could do it agai; /archives//html/Amps/2015-01/msg00297.html (11,491 bytes)
7. Re: [Amps] 833A GG (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 26 Jan 2015 10:58:18 -0600; Yup, that's the main problem, Bill. Well, a single 833A won't do the legal limit without pushing the envelope. And the trouble with P-P is that the old parallel-tuned link coupled output circuit does; /archives//html/Amps/2015-01/msg00302.html (8,498 bytes)
8. Re: [Amps] 833A GG (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 26 Jan 2015 13:47:30 -0600; Hi Bill, I'm sorry, I didn't state that question correctly. I'm fully aware that Gates used two in parallel, but that was on the AM BCB. Those 833Cs and a few other components in my amp came from one; /archives//html/Amps/2015-01/msg00305.html (8,141 bytes)
9. Re: [Amps] 833A GG (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 26 Jan 2015 14:59:45 -0500; Heck I had a pair of 100TH's on 6M in the early 60's but no matter what I did with the bias or drive could I get high output and no splatter at the same time. At 3KV they glowed nice. Shortly after t; /archives//html/Amps/2015-01/msg00306.html (14,531 bytes)
10. Re: [Amps] 833A GG (score: 1): Author: "Fuqua, Bill L" <wlfuqu00@uky.edu>; Date: Mon, 26 Jan 2015 21:10:57 +0000; I should do something with my 2000T. Hi Hi 73 Bill wa4lav Heck I had a pair of 100TH's on 6M in the early 60's but no matter what I did with the bias or drive could I get high output and no splatter; /archives//html/Amps/2015-01/msg00307.html (15,112 bytes)
11. Re: [Amps] 833A GG (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 26 Jan 2015 17:13:55 -0500; Thats worth more to a collector than chancing it is gassy and blow the filament. Carl KM1H -- From: "Fuqua, Bill L" <wlfuqu00@uky.edu> Sent: Monday, January 26, 2015 4:10 PM To: "Carl" <km1h@jeremy.q; /archives//html/Amps/2015-01/msg00308.html (16,201 bytes)
12. Re: [Amps] 833A GG (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Mon, 26 Jan 2015 16:47:11 -0600; Anybody know where I can get a neutralizing capacitor for two paralleled 833Cs? What I had in mind is in the second photo from the top at www.criticalradio.com/833%20Rig%20Project/Web%20Pages/RF%20De; /archives//html/Amps/2015-01/msg00312.html (8,416 bytes)
13. Re: [Amps] 833A GG (score: 1): Author: "Carl" <km1h@jeremy.qozzy.com>; Date: Mon, 26 Jan 2015 18:19:53 -0500; You can always use a piece of regular solid dielectric coax or even hardline off the anode and then followed by a LV variable. I used a piece of RG-17 and a small mil surplus cap with about 1500-2000; /archives//html/Amps/2015-01/msg00313.html (9,940 bytes)
14. Re: [Amps] 833A GG (score: 1): Author: Mike Waters <mikewate@gmail.com>; Date: Tue, 27 Jan 2015 05:23:25 -0600; Thanks, Carl. I might do that. Something like this ought to work using your method: http://www.ebay.com/itm/Capacitor-air-variable-capacitor-tuner-dual-30-Pf-capacitor-/151482230814 The neut cap that; /archives//html/Amps/2015-01/msg00316.html (10,441 bytes)

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