Pete,

Do you think the 1N5767 would be a good choice for replacing the
switching diodes in the front-end bandpass filters of the R8? Also, have
you ever considered a better roofing filter for the R8?

Thanks

Pete KE9OA wrote:

Thanks for the response, Pete. Yes, very effective. BTW, I posted the mods
there.

Now, as far as filter switching diodes, my favorite (doesn't mean that
this is the best) is the 1N5767 PIN diode, biased at around 75mA. I have
had good results using leaded devices.

Is that still a good choice if I can push only 10-12mA? It would require a
complete redesign to go higher.

This amount of current would be fine..........I think that the resistance
would be about 5 ohms with this bias level.

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