[Boatanchors] Ampliphase

[Charles Ring]

A local 5KW station here had an Ampliphase. I could always tell when it 
was on the air from the distortion. Ampliphase was often called Amplifuzz.



On 7/10/2011 11:04 PM, Richard Knoppow wrote:
> ----- Original Message -----
> From: "Paul Baldock"<paul at paulbaldock.com>
> To:<boatanchors at mailman.qth.net>
> Sent: Sunday, July 10, 2011 6:22 PM
> Subject: [Boatanchors] Ampliphase
>
>
>> Has anybody ever designed and built an Ampliphase
>> Transmitter? Any
>> schematics to share?
>>
>> Thanks
>>
>> - Paul  KW7Y
>>
>        Try searching for outphasing modulation or Chireix
> modulation. Ampliphase was a trade name used by RCA for a
> version of this. Its a clever idea that is hard to
> accomplish in practice as RCA found to their chagrin. The
> method was first (?) described by H.Chireix in a paper in
> the _Procedings of the Institute of Electrical Engineers_ in
> 1935. Some very high power transmitters were built in Europe
> but proved too troublesom.
>        In theory it should provide a low distortion, high
> efficiency method of modulation without the need for a
> modulation transformer, but its too critical of adjustment
> and did not prove practical.
>
>
> -