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 quite ready for QRO SS below 1296 MHz.
Carl
KM1H
----- Original Message -----
From: "Peter Frenning [OZ1PIF]" <peter@frenning.dk>
To: "jeremy-ca" <km1h@jeremy.mv.com>; <amps@contesting.com>
Sent: Saturday, March 01, 2008 4:38 PM
Subject: Re: [Amps] Class-E Amplifiers
> If you had looked in my signature below, you would have found this link:
> http://www.frenning.dk/oz1pif.htm
>
> jeremy-ca skrev:
>> What home page???
>>
>> Carl
>>
>>
>> ----- Original Message ----- From: "Peter Frenning [OZ1PIF]"
>> <peter@frenning.dk>
>> To: "jeremy-ca" <km1h@jeremy.mv.com>
>> Cc: "AMPS" <amps@contesting.com>; "Bill Fuqua" <wlfuqu00@uky.edu>
>> Sent: Saturday, March 01, 2008 11:16 AM
>> Subject: Re: [Amps] Class-E Amplifiers
>>
>>
>>> 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@frenning.dk>
>>>> To: "jeremy-ca" <km1h@jeremy.mv.com>
>>>> Cc: "AMPS" <amps@contesting.com>; "Bill Fuqua" <wlfuqu00@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@uky.edu>
>>>>>> To: "jeremy-ca" <km1h@jeremy.mv.com>; "AMPS" <amps@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@uky.edu>
>>>>>>>> To: "AMPS" <amps@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@contesting.com
>>>>>>>>> http://lists.contesting.com/mailman/listinfo/amps
>>>>>>>>>
>>>>>>>>>
>>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> Amps mailing list
>>>>>> Amps@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
>>> ***********************************
>>>
>>
>>
>
> --
> 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
> ***********************************
>
>
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