300 Watt AM Amp Plans?

[Meir WF2U]

Is the amplifier intended for 300 W unmodulated carrier or 300 W Peak  
Envelope Power (PEP - carrier plus modulation)?

If it's for 300 W carrier you need a 1200W amplifier, to accomodate  
100%modulation added to the 300W carrier and not exceed the amplifier  
maximum PEP rating.
(for the legal limit of 1500W it breaks down as 375 W carrier + 100%  
modulation).
For 300W PEP you don't need an amplifier for the TX-1. The 100W  
carrier plus the modulation (provided the modulation is at or near  
100%)  make a total of 400W PEP.
Just to wrap it up, 300 W PEP output is made up from 75W carrier + modulation.

73, Meir WF2U
Landrum, SC



Quoting Scott Johnson <scottjohnson1 at COX.NET>:

> If you build a linear amplifier for the 300 watt level,  I would   
> think the increase would hardly be worth the trouble.  That being   
> said, I recall several designs that use a forest of 807's in   
> parallel, and end up with a plate load of 50-75 ohms, so the amp   
> basically needs no tuned plate circuit.  I have no idea how it   
> performs on the upper bands, but it may work OK for 160/75/40.  The   
> power supply, IIRC, was 600-700 V @ 1.5 A or so, derived fron 115 to  
>  460 V control transformers.
>
> 73, Scott W7SVJ
> ---- Lin Robertson <digital-conjurers at ROADRUNNER.COM> wrote:
>> Am looking around for some plans for a homebrew 300W AM amp to use with my
>> TX-1.  Anyone have any suggestions/favorites?  (I have quite a few 807's,
>> BTW, but I realize this is hardly an ideal tube...<grin>...but it would be
>> fun to use them, as they are "at hand"...)
>>
>> Tnx,
>>
>> Lin/KJ6EF
>>
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