That is a inteesting design, it using inexpensive switching MOS FET.
I have used 2SK428 built 10m amplifier, working great.
I guess it is transformerless design, power supply from AC main direct.
73!Hsu
----- Original Message -----
From: "Henk Remijn PA5KT" <pa5kt@remijn.net>
To: "Hsu" <hsu4qro@gmail.com>
Cc: "Tack Kumagai" <je1cka@chofu.jaxa.jp>; <amps@contesting.com>
Sent: Monday, June 07, 2010 10:13 PM
Subject: Re: [Amps] New Handy Amp
> ２ＳＫ２４８２ ×６
>
> Hsu schreef:
>> What RF power devices using?
>> ----- Original Message -----
>> From: "Tack Kumagai" <je1cka@chofu.jaxa.jp>
>> To: <amps@contesting.com>
>> Sent: Monday, June 07, 2010 3:51 PM
>> Subject: [Amps] New Handy Amp
>>
>>
>>
>>> Hi all
>>>
>>> Thamway announces the new small amp "DXV500Z"
>>> Unfortunately the introduction was written in Japanese.
>>> http://www.thamway.co.jp/ham/ham_00.html
>>>
>>> It's read as;
>>> size is same as DXV500L listed below
>>> (W202xH101xD303mm)
>>> Primary ACV: 100-230V
>>> Power Out: 1.8-7MHz:500w+, 10-18MHz:350w, 21-28MHz:300w
>>> Weight: 8Kg
>>>
>>> They has Transless amp DXV500L.
>>> 500w out on 160/80/40m
>>> Weight: 4.4kg
>>> Primary ACV: 100Vonly
>>> You can view the inside
>>> http://www.enec.jp/amp/
>>> ---------
>>> Tack Kumagai JE1CKA/KH0AM
>>> JE1CKA <je1cka@gmai.com>
>>> _______________________________________________
>>> Amps mailing list
>>> Amps@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/amps
>>>
>> _______________________________________________
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>> http://lists.contesting.com/mailman/listinfo/amps
>>
>>
>
>
> --
> Henk Remijn PA5KT
> email: pa5kt@remijn.net
> www: www.remijn.net
>
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