[AMPS] Re: 4 to 1 un-un at the tank output

[Roy Koeppe]

Rich insists,


 "For this application, Type 61 ferrite is rated by the manufacturer at
10MHz max.   Using type 61 (mu=c.125) material at 14MHz, sinewave
distortion can easily be seen on an oscilloscope.   Type 43 ferrite is
rated at 50MHz."

I know we've gone thru this before, but my Amidon catalog lists 61
ferrite used in (low Q) BROAD BAND transmission line transformer service
good to 200 mHz. A la, most every balun and un-un on the market.

Mir,    Roy                K6XK




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