[AMRadio] Modulator question.


Robert Lawson w4rl at bellsouth.net
Fri May 7 18:53:34 EDT 2010


Several members of the Gulf Coast Mullet Society Net on 3885 kcs use the 
combination of a DX-60 driving a Heath SB-200 and their audio sounds great, 
along with some RF punch to boot.

73 Robert W4RL
Trustee of W4GCM


----- Original Message ----- 
From: "Bob Macklin" <macklinbob at msn.com>
To: "Discussion of AM Radio in the Amateur Service" 
<amradio at mailman.qth.net>
Sent: Friday, May 07, 2010 5:33 PM
Subject: Re: [AMRadio] Modulator question.


>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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