[Amps] Class-E Amplifiers

[Peter Frenning [OZ1PIF]]

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 
nothing obvious is wrong with its output or linearity.

jeremy-ca skrev:
> That is impressive Peter. Do you have any details, spectrum plots, etc?
>
> Carl
> KM1H
>
>
> ----- Original Message ----- From: "Peter Frenning [OZ1PIF]" 
> <peter at frenning.dk>
> To: "jeremy-ca" <km1h at jeremy.mv.com>
> Cc: "AMPS" <amps at contesting.com>; "Bill Fuqua" <wlfuqu00 at uky.edu>
> Sent: Friday, February 29, 2008 6:04 PM
> Subject: Re: [Amps] Class-E Amplifiers
>
>
>> 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 skrev:
>>> 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
>>>
>>> ----- Original Message ----- From: "Bill Fuqua" <wlfuqu00 at uky.edu>
>>> To: "jeremy-ca" <km1h at jeremy.mv.com>; "AMPS" <amps at contesting.com>
>>> Sent: Friday, February 29, 2008 3:57 PM
>>> Subject: Re: [Amps] Class-E Amplifiers
>>>
>>>
>>>
>>>> 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 to get 80 to 90 
>>>> percent plate efficiency.
>>>> 73
>>>> Bill wa4lav
>>>>
>>>>
>>>> At 03:28 PM 2/29/2008 -0500, jeremy-ca wrote:
>>>>
>>>>> 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 PS. I was 
>>>>> impressed but
>>>>> I still like the glow of my 250TH's and 304TL's ! Even tho it 
>>>>> takes up a lot
>>>>> of space and weighs a ton.
>>>>>
>>>>> Carl
>>>>> KM1H
>>>>>
>>>>> ----- Original Message -----
>>>>> From: "Bill Fuqua" <wlfuqu00 at uky.edu>
>>>>> To: "AMPS" <amps at contesting.com>
>>>>> Sent: Friday, February 29, 2008 10:12 AM
>>>>> Subject: [Amps] Class-E Amplifiers
>>>>>
>>>>>
>>>>>
>>>>>>     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 power goes to the output. If so 
>>>>>> this would
>>>>>> reduce the overall  efficiency of a single stage amplifier  and 
>>>>>> driver if
>>>>>> the driver is not  Class-E.
>>>>>>
>>>>>> 73
>>>>>> Bill wa4lav
>>>>>>
>>>>>> _______________________________________________
>>>>>> Amps mailing list
>>>>>> Amps at contesting.com
>>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>>
>>>>>>
>>>>
>>>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps at contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>>>
>>
>> -- 
>> Vy 73 de OZ1PIF/5Q2M, Peter
>>
>> ** CW: Who? Me? You must be joking!! **
>> email: peter(no-spam-filler)@frenning.dk
>> http://www.frenning.dk/oz1pif.htm
>> Ph. +45 4619 3239
>> Snailmail:
>> Peter Frenning
>> Ternevej 23
>> DK-4130 Viby Sj.
>> Denmark
>> ***********************************
>>
>>
>
>

-- 
Vy 73 de OZ1PIF/5Q2M, Peter
 
** CW: Who? Me? You must be joking!! **
email: peter(no-spam-filler)@frenning.dk
http://www.frenning.dk/oz1pif.htm
Ph. +45 4619 3239
Snailmail:
Peter Frenning
Ternevej 23
DK-4130 Viby Sj.
Denmark
***********************************