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References: [ +subject:/^(?:^\s*(re|sv|fwd|fw)[\[\]\d]*[:>-]+\s*)*LF\:\s+Re\:\s+Smaller\s+DC\s+feeding\s+choke\s+in\s+class\s+E\s+amplifier\s*$/: 8 ]

Total 8 documents matching your query.

1. LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Alan Melia" <[email protected]>
Date: Fri, 07 Mar 2008 22:30:55 +0100
Hi Johan, yes a quick look suggests a value of anything over about 120uH would do the job at 136 with a 10ohm load. I looked for data when I started to experiment as I am sure you did and just built
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00034.html (11,914 bytes)

2. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Graham" <[email protected]>
Date: Sat, 08 Mar 2008 12:45:34 +0100
Hi Alan, I never could get a handle on using passive components to feed pulse amps , a sort of contradiction ? what do they do in a mobile phone ? G .. Hi Joe , Thanks for the "plug" :-)) Yes the cir
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00071.html (12,568 bytes)

3. LF: RE: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Michael Probert" <[email protected]>
Date: Fri, 07 Mar 2008 23:34:43 +0100
Johan and LF, During my experiments with class E the choke was not a component to which I paid great attention. Having said that, when operating at 500khz, I tried reducing the value to around a few
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00195.html (11,280 bytes)

4. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Alan Melia" <[email protected]>
Date: Sat, 08 Mar 2008 18:17:00 +0100
Hi Graham I think it is a misunderstanding to think that the power supply must supply peaks of current. This is what the choke avoids, there will be some ripple on the supply but it should be quite m
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00264.html (18,607 bytes)

5. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Alan Melia" <[email protected]>
Date: Sat, 08 Mar 2008 14:44:37 +0100
Hi Graham, well there is not a lot of difference between "pulse amps" and any other sort really from that point of view. The choke "opposes changes in current" and also allows the signal to go to the
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00279.html (14,733 bytes)

6. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Graham" <[email protected]>
Date: Sat, 08 Mar 2008 16:24:15 +0100
Ok Alan, Ok , no problem on the 'isolation' using a inductor , I was thinking more of the power supply demand/regulation side of things , looks like these things are a bit tricky to feed 'dc' interms
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00324.html (15,963 bytes)

7. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: [email protected]
Date: Fri, 7 Mar 2008 20:17:38 -0330 (NST)
Alan, Johan and group, Since experimenting on LF I have discovered the joys of Class E, many thanks to Alan. My first 100W TX used an IRF-640 as suggested on Alan's web page. A dozen of them could be
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00388.html (10,440 bytes)

8. Re: LF: Re: Smaller DC feeding choke in class E amplifier (score: 1)
Author: "Alan Melia" <[email protected]>
Date: Sat, 08 Mar 2008 01:32:00 +0100
Hi Joe , Thanks for the "plug" :-)) Yes the circulating currents get pretty large with the low impednces when you try to put high power out with 12 supply. It doesnt do some caps a lot of good either
/rsgb_lf_group-archives/html/rsgb_lf_group/2008-03/msg00407.html (12,037 bytes)


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