solid state kit

[Bill Coleman AA4LR]

>From:        rohre, rohre@arlut.utexas.edu
>
>Reality Check Time re a 500 watt TRANSISTOR amplifier Kit!  Look at the
>proposed 13.8 Volt operation.  Look at the OHMS LAW for this operation!  Who
>builds such transformers?  Who can afford them?

Who says you have to use 13.8 volts? Why not 24, 28 or 50 volts? 
(Provided the high-power transistors can handle it)

As for transformers -- can you say switching power supplies? That solves 
part of the transformer problem.

>The only practical way to develop higher power is to use higher voltage
>transistors or FETS.  Makes a pretty complicated kit.

Higher voltage transistors is in no way more complicated.

>Don't you wonder why the vast majority of Linear manufacturers are still 
>using Tube Finals? The power supply and tubes for that cost A LOT LESS than 
the
>solid state solution.

Tubes aren't getting any cheaper. At some point, we'll reach the 
watershed where a solid state devices are a better alternative. (We may 
have to wait until someone produces 500W MMICs....)



Bill Coleman, AA4LR           Mail: aa4lr@radio.org
Quote: "Not in a thousand years will man ever fly!"
            -- Wilbur Wright, 1901


--
FAQ on WWW:               http://www.contesting.com/tentecfaq.html
Submissions:              tentec@contesting.com
Administrative requests:  tentec-REQUEST@contesting.com
Problems:                 w9tw@contesting.com
Sponsored by:             Akorn Access, Inc & KM9P