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Total 13 documents matching your query.

1. Re: LF: RE: Class E etc (score: 1): Author: "Graham" <[email protected]>; Date: Thu, 14 Jun 2012 01:55:34 +0100; Ok Pete .. blow up ? !!......Depends on the tubes : )) http://home.comcast.net/~n6jv/data/6C21.pdf This is what you need (with a bit of re-work) ..... http://www.radartutorial.eu/08.transmitters/tx06; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00045.html (52,373 bytes)
2. LF: RE: Class E etc (score: 1): Author: "Ken" <[email protected]>; Date: Mon, 11 Jun 2012 22:09:29 +0100; Hi Pete. About 40 years ago my integration was quite good, liked doing 2nd order differential equations, partial integration and integration by parts, the one thing I had big problems with was 3 dime; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00049.html (26,106 bytes)
3. Re: LF: RE: Class E etc (score: 1): Author: M0FMT <[email protected]>; Date: Wed, 13 Jun 2012 15:51:43 +0100 (BST); Pete es Co The class C tube amplifer is the nearest you can get to class D or E and well designed would produce 70% efficiency. The class D or E is not really an amplifier in the convential sense it; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00060.html (40,925 bytes)
4. Re: LF: RE: Class E etc (score: 1): Author: Stefan Schäfer <[email protected]>; Date: Wed, 13 Jun 2012 23:05:56 +0200; Hi Pete, LF, On 137 kHz or 500 kHz you can quite easy achieve 95% efficiency with a class E PA. BTW a ferrite transformer is not needed! So if your antenna provides stable resonance and impdedance an; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00087.html (46,164 bytes)
5. Re: LF: RE: Class E etc (score: 1): Author: M0FMT <[email protected]>; Date: Thu, 14 Jun 2012 10:24:13 +0100 (BST); Ok Pete .. blow up ? !!......Depends on the tubes : )) http://home.comcast.net/~n6jv/data/6C21.pdf This is what you need (with a bit of re-work) ..... http://www.radartutorial.eu/08.transmitters/tx0; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00136.html (57,990 bytes)
6. Re: LF: RE: Class E etc (score: 1): Author: "mal hamilton" <[email protected]>; Date: Tue, 12 Jun 2012 20:50:24 +0100; Pete es Co The class C tube amplifer is the nearest you can get to class D or E and well designed would produce 70% efficiency. The class D or E is not really an amplifier in the convential sense it; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00207.html (34,169 bytes)
7. Re: LF: RE: Class E etc (score: 1): Author: "Graham" <[email protected]>; Date: Tue, 12 Jun 2012 12:27:16 +0100; Triggertron and a delay line (lumped) modern spark set hi From: [email protected] M0FMT Sent: Tuesday, June 12, 2012 12:15 PM To: [email protected] [email protected] Subject: Re; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00245.html (32,441 bytes)
8. Re: LF: RE: Class E etc (score: 1): Author: "Graham" <[email protected]>; Date: Wed, 13 Jun 2012 20:31:59 +0100; Gosh me too ! A switching valve cct and something that '' maintains circulating current within each resonator. Since the resonator is designed to store high KVA'' lumped delay line .... with a little; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00250.html (43,350 bytes)
9. Re: LF: RE: Class E etc (score: 1): Author: M0FMT <[email protected]>; Date: Tue, 12 Jun 2012 12:15:11 +0100 (BST); Hi Pete. About 40 years ago my integration was quite good, liked doing 2nd order differential equations, partial integration and integration by parts, the one thing I had big problems with was 3 dim; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00334.html (32,507 bytes)
10. Re: LF: RE: Class E etc (score: 1): Author: Warren Ziegler <[email protected]>; Date: Tue, 12 Jun 2012 07:21:22 -0400; Years ago, several ham friends of mine have made valve type transmitters run in Class-D or E on 75 and 40 meters, 500kHz should be no problem at all. 73 Warren K2ORS -- 73 Warren K2ORS; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00553.html (18,459 bytes)
11. Re: LF: RE: Class E etc (score: 1): Author: "Graham" <[email protected]>; Date: Thu, 14 Jun 2012 11:32:29 +0100; Ok P Well I just looked at a pic of the amp , tubes are 811a replacements , good tube , in grounded grid ? , 813 has similar anode dissipation 120 watts , but more gain + neutralisation problems : (; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00579.html (60,930 bytes)
12. Re: LF: RE: Class E etc (score: 1): Author: M0FMT <[email protected]>; Date: Tue, 12 Jun 2012 15:47:49 +0100 (BST); Hi Graham and Warren My intention was to send this info I had used to good effect directly to Ken but forgot at the last minute and hit send. I love thermionic devices. The way my FL2000B lights up t; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00680.html (20,997 bytes)
13. Re: LF: RE: Class E etc (score: 1): Author: M0FMT <[email protected]>; Date: Wed, 13 Jun 2012 23:59:15 +0100 (BST); Hi Pete, LF, On 137 kHz or 500 kHz you can quite easy achieve 95% efficiency with a class E PA. BTW a ferrite transformer is not needed! So if your antenna provides stable resonance and impdedance a; /rsgb_lf_group-archives/html/rsgb_lf_group/2012-06/msg00685.html (50,295 bytes)

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