[AMRadio] Modulator question.


Bob Macklin macklinbob at msn.com
Fri May 7 18:33:54 EDT 2010


A transmitter like the DX-60 puts out about 12W of carrier in AM mode. It 
uses Controlled Carrier modulation and does not require a modulation 
transformer.

Bob Macklin
K5MYJ
Seattle, Wa.
"Real Radios Glow In The Dark"
----- Original Message ----- 
From: "MUCHSTUFF" <soundval at muchstuff.com>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Friday, May 07, 2010 3:05 PM
Subject: Re: [AMRadio] Modulator question.


> Have you considered using a car audio amplifier in a cathode modulation?
> If possible it could avoid finding another transformer that would stand 
> the
> higher voltage and current in a plate arrangement.
> I give this some thought every time I'm in my friends  car audio store.
> But, being one who always starts too much new stuff, I stop thinking about
> it.
>
> Gene, WB6SZS
>
>
>
> ----- Original Message ----- 
> From: "RICHARD GEORGE" <k6kwq at msn.com>
> To: "amlist" <amradio at mailman.qth.net>
> Sent: Friday, May 07, 2010 12:34 PM
> Subject: [AMRadio] Modulator question.
>
>
>>I have over the years built several low power AM transmitters. I would 
>>like
>>to build something a little bigger say in the 400-500 watt plate 
>>modulated.
>>I have been kicking around the idea of using one of the solid state
>>amplifiers made for car audio driving a reverse connected audio
>>transformer. I have seen these audio output transformers available in the
>>200 watt range. I understand that the RF output stage would have to be
>>designed to fit the impedence of the output transformer.  Does this sound
>>like it could be done?
>>
>> K6KWQ Dick
>> Amps by "MORE POWER"
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