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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*\[Amps\]\s+Class\-E\s+Amplifiers\s*$/: 14 ]

Total 14 documents matching your query.

1. [Amps] Class-E Amplifiers (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 29 Feb 2008 10:12:55 -0500
Class E amplifiers have high efficiency but what about gain and drive power. Some that I have see have about 10db gain but unlike tube type Grounded Grid amplifiers I don't think any of the input pow
/archives//html/Amps/2008-02/msg00217.html (6,494 bytes)

2. Re: [Amps] Class-E Amplifiers (score: 1)
Author: ToddRoberts2001@aol.com
Date: Fri, 29 Feb 2008 13:24:14 EST
In a message dated 2/29/2008 10:14:29 A.M. Eastern Standard Time, wlfuqu00@uky.edu writes: Class E amplifiers have high efficiency but what about gain and drive power. Some that I have see have about
/archives//html/Amps/2008-02/msg00220.html (8,169 bytes)

3. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 29 Feb 2008 15:28:35 -0500
Arent Class E monoband amps and pretty much with a 7 MHz upper limit? At least that was what I was told by an active E builder who had a 400W 75M AM amp inside about a 17 x 12 x 3 chassis minus the P
/archives//html/Amps/2008-02/msg00223.html (8,238 bytes)

4. Re: [Amps] Class-E Amplifiers (score: 1)
Author: Bill Fuqua <wlfuqu00@uky.edu>
Date: Fri, 29 Feb 2008 15:57:43 -0500
No, they are making class-E amplifiers up in the microwave range now. Naturally they don't have such high efficiencies as they have at HF frequencies. But broadcast triodes in class-C have been able
/archives//html/Amps/2008-02/msg00224.html (9,264 bytes)

5. Re: [Amps] Class-E Amplifiers (score: 1)
Author: ToddRoberts2001@aol.com
Date: Fri, 29 Feb 2008 16:05:05 EST
In a message dated 2/29/2008 3:04:05 P.M. Eastern Standard Time, wlfuqu00@uky.edu writes: You can't simply tune out the capacitance with inductance and say you have no power loss on the input of the
/archives//html/Amps/2008-02/msg00225.html (8,099 bytes)

6. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Fri, 29 Feb 2008 17:09:33 -0500
I should have been more specific. When using power Mosfets of the IRF and similar cheapies numbers which is what many hams appear to be using on MF and low HF. Carl KM1H _____________________________
/archives//html/Amps/2008-02/msg00226.html (10,252 bytes)

7. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
Date: Sat, 01 Mar 2008 00:04:06 +0100
Carl I'm using IRF510 on six (50MHz) to produce 500W in Class AB. Judged from my efforts to tame the beast, they should be able to switch fast enough to do Class E at least as high as that! jeremy-ca
/archives//html/Amps/2008-02/msg00228.html (11,718 bytes)

8. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "Jim Tonne" <tonne@comcast.net>
Date: Fri, 29 Feb 2008 18:09:10 -0500
There is not upper limit to how high in frequency a Class E amplifier can operate. The "final amplifier" operates as a switch and so the use of a tetrode instead of a triode would be best. At 75 mete
/archives//html/Amps/2008-02/msg00229.html (8,367 bytes)

9. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 1 Mar 2008 21:54:37 -0500
Pretty neat. I still prefer my converted SB-200 for portable use; 750W out and 35 pounds includes the power supply. And I dont have to worry about hurting it with 100W or poor VSWR. I guess Im not qu
/archives//html/Amps/2008-03/msg00000.html (17,212 bytes)

10. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
Date: Sat, 01 Mar 2008 17:16:00 +0100
No spectrum plots or IMD figures, unfortunately. Lots of detailed information (enough for reproduction anyway) on my homepage. Several thousand QSOs under the belt with it and no complaints heard, so
/archives//html/Amps/2008-03/msg00002.html (13,393 bytes)

11. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
Date: Sat, 01 Mar 2008 22:38:58 +0100
If you had looked in my signature below, you would have found this link: http://www.frenning.dk/oz1pif.htm jeremy-ca skrev: -- Vy 73 de OZ1PIF/5Q2M, Peter ** CW: Who? Me? You must be joking!! ** emai
/archives//html/Amps/2008-03/msg00003.html (16,044 bytes)

12. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 1 Mar 2008 14:18:53 -0500
What home page??? Carl _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-03/msg00004.html (14,620 bytes)

13. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sat, 1 Mar 2008 08:56:19 -0500
That is impressive Peter. Do you have any details, spectrum plots, etc? Carl KM1H _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mai
/archives//html/Amps/2008-03/msg00013.html (12,339 bytes)

14. Re: [Amps] Class-E Amplifiers (score: 1)
Author: "jeremy-ca" <km1h@jeremy.mv.com>
Date: Sun, 2 Mar 2008 22:05:26 -0500
Why is the forum repeating 1-2 day old messages? Carl _______________________________________________ Amps mailing list Amps@contesting.com http://lists.contesting.com/mailman/listinfo/amps
/archives//html/Amps/2008-03/msg00023.html (13,953 bytes)

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