300 Watt AM Amp Plans?

Scott Johnson scottjohnson1 at COX.NET
Tue Apr 29 09:52:17 EDT 2008


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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