Re: Low pass filter advice #vfo #40m #80m


Peter GM0EUL
 

Thanks Evan
That seems to have done it.  With 47 Ohm across the scope it behaves exactly as I would expect i.e the 40m filter is flat to about 8.2 MHz then drops off quickly.  Testing the 80m filter now but I'm expecting that to behave itself too.

Noted about the need for a transformer when coupling the vfo to the transmitter.  It isn't expecting 50 Ohm I don't think, but not sure what it is expecting.  I'll see if I can figure it out.

73
Peter GM0EUL

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