[Lowfer] Re: Amplifiers for 136k

[BOB RIESE]

Hi All

I just pulled out the info on the National Semiconductor LM 1875
this is a 20 to 30 watt audio chip that Frank Gentges tested to
, I believe 300 Khz. With a good heat sink this device should produce
25 watts out at 136 Khz. It is a simple idea to get some usable power
and the chip, when I looked into it, was 3 bux or so. All you should need
is
a transformer to get you from 8 ohms to the antenna imp. All fits in a TO
220
package and needs 5 resistors and 7 caps to get it operational 

Unfortunately I only looked into it and never bought any but that should
be 
a winter project.

this would make a transmitter with the power of the average small airport
NDB

Bob  K3DJC