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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+G\-G\s+Amplifiers\s+With\s+No\s+Tuned\s+Input\.\s*$/: 21 ]

Total 21 documents matching your query.

1. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Thu May 8 08:54:21 2003; /archives//html/Amps/2003-05/msg00059.html (8,457 bytes)
2. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Wed May 7 08:21:54 2003; At VHF the circuit is not really a T... Just look at the grid to cathode capacitance and it really comes out to be a L-PI circuit... 73 Bill wa4lav; /archives//html/Amps/2003-05/msg00058.html (8,934 bytes)
3. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: philk5pc at tyler.net (Phil Clements); Date: Wed May 7 08:21:37 2003; . W8JI has always preached against "T" networks in input circuits, but I notice many popular 6 meter amp projects feature one. Has anyone made any IMD comparisons between Pi and T input networks? Is; /archives//html/Amps/2003-05/msg00052.html (8,674 bytes)
4. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: vic at rakefet.com (Vic Rosenthal); Date: Wed May 7 08:21:32 2003; I think the simplest way to express this is just to say that the 'low pass' type of network has a low Q compared to the 'resonant' network. Vic K2VCO; /archives//html/Amps/2003-05/msg00050.html (8,917 bytes)
5. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:57:28 2003; Well, lets see.... If you have a filter with a center frequency of 1 MHz and a Q of .5 then the cut off frequency would be 2 MHz and lowest frequency would be Zero by the definition of Q= Center Freq; /archives//html/Amps/2003-05/msg00047.html (11,903 bytes)
6. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Tue May 6 09:57:22 2003; ** This simplified method of determining Q is the one used in Eimac's 'Care and Feeding', however, the actual Q is seemingly a bit higher. Theory and analysis have their place but the goal is that t; /archives//html/Amps/2003-05/msg00044.html (10,289 bytes)
7. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: W4EF at dellroy.com (Michael Tope); Date: Tue May 6 09:57:17 2003; Yes, quite right on the output PI network, Bill. However, if you plug the values for Q=1 into a circuit simulator (I just ran them), the frequency response of a tuned input PI looks a lot like a cla; /archives//html/Amps/2003-05/msg00042.html (10,466 bytes)
8. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:57:06 2003; There are resonant pi networks and low pass filter pi networks...... These are resonant. If you perform a frequency plot of the output vs the input you will get a small signal up to the point of reso; /archives//html/Amps/2003-05/msg00038.html (12,171 bytes)
9. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: W4EF at dellroy.com (Michael Tope); Date: Tue May 6 09:57:02 2003; How come all the tuned input circuits I see in amplifiers look like PI-networks, Bill? This is a low-pass configuration or am I over simplfying things? I suppose if I take a standard 3 pole low-pass; /archives//html/Amps/2003-05/msg00036.html (10,911 bytes)
10. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Tue May 6 09:56:57 2003; ** True for very good, however, good enough for typical transceivers/exciters is an input capacitive reactance roughly equal to the cathode's minimum instantaneous ohms during the negative peak in t; /archives//html/Amps/2003-05/msg00033.html (10,696 bytes)
11. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wlfuqu00 at uky.edu (Bill Fuqua); Date: Tue May 6 09:56:55 2003; The problem with a grounded grid or any RF amplifier that has a non-linear input impedance ie non-resistive is that the exciter is not loaded with the same impedance during the entire RF cycle. This; /archives//html/Amps/2003-05/msg00032.html (13,159 bytes)
12. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: RMcGraw at Blomand.Net (Robert & Linda McGraw K4TAX); Date: Mon May 5 08:16:28 2003; I'd agree with the question, "how does the problem manifest itself?". I use a Paragon to drive the Centurion (which does have low pass filters for each band on the input). I'd suppose there is enough; /archives//html/Amps/2003-05/msg00027.html (10,449 bytes)
13. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: W4EF at dellroy.com (Michael Tope); Date: Sun May 4 08:43:15 2003; The Paragon uses a low-pass/hi-pass cascade for the receiver, but only the low-pass filters are used on the TX side. The low-pass filters are made with beefy components and switched with reed relays; /archives//html/Amps/2003-05/msg00024.html (9,091 bytes)
14. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Sun May 4 08:43:14 2003; Input SWR not good enough to prevent throttle-back.. These are usually band-pass filters. If there is no tuner in the radio, yes. cheers, Mike - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K, w; /archives//html/Amps/2003-05/msg00023.html (10,016 bytes)
15. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: W4EF at dellroy.com (Michael Tope); Date: Sun May 4 08:43:12 2003; How does the problem manifest itself, Rich. I have used the Alpha 78 quite a bit with a Kenwood TS-940, Ten-Tec Paragon, and Kenwood TS-950SDX. All of these rigs are solid state, but don't seem to ha; /archives//html/Amps/2003-05/msg00022.html (8,986 bytes)
16. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Sat May 3 17:37:17 2003; ** The typical duty-cycle for SSB 2-way is c. 15%. I stock some low-L,3W-CCS @70?C Matsushita MOF resistors that will easily do 15w each in SSB service. With the ultra-fast diode shipment, I will in; /archives//html/Amps/2003-05/msg00016.html (13,279 bytes)
17. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Sat May 3 17:37:17 2003; ** Maybe just fine with a radio with a built-in tuner. ** ... makes sense since there is nothing to balance out the asymmetrical cathode input-Z - R. L. Measures, a.k.a. Rich..., 805.386.3734, AG6K,; /archives//html/Amps/2003-05/msg00017.html (14,998 bytes)
18. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: wc6w at juno.com (Radio WC6W); Date: Sat May 3 17:37:15 2003; <snip> <snip> Hi Rich, The idea was tried 40 years ago! See "Imporved Grounded Grid Operation" by Paul Barton, Sept. 1962, 73 Magazine, pp 34-36. The author used a 6X4 (rectifier tube), with both sec; /archives//html/Amps/2003-05/msg00014.html (9,946 bytes)
19. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Sat May 3 17:37:14 2003; ** I purchased ten of 'em to distribute free for R and D. Are you still at 7509 Wakulla Dr. ? -- My guess is that the input terminator R that the diode goes in series with should be 50 - 75 ohms. If; /archives//html/Amps/2003-05/msg00012.html (10,225 bytes)
20. [Amps] G-G Amplifiers With No Tuned Input. (score: 1): Author: 2 at vc.net (2); Date: Fri May 2 08:30:56 2003; Amplifiers such as the MLA-2500, SB-230, 374, 78, and 76PA have no tuned input. This is not a problem when such a g-g amplifier is driven by a tube-output radio such as the TS-830S. The reason is tha; /archives//html/Amps/2003-05/msg00009.html (8,863 bytes)

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