[ARC5] More on the Pullen Mixer circuit

[Ron Barlow]

FWIW, I have constructed 2 different down converters that do not have an RF stage preceding the Pullen mixer. They work fine. This design has a low noise figure, and the lack on an RF stage is not a liability, at least up thru 30m, which is the highest freq that I have experimented with, using the Pullen. I did use a double tuned input circuit, to eliminate any potential image problems, but that may not have been necessary, considering the relatively high IF freq that I was using. I only needed a total of 3 triodes, in these converters, as the LO is xtal controlled, so "pulling" is not an issue.    73 de ron 

    On Tuesday, January 3, 2017 6:17 PM, "arc5 at ix.netcom.com" <arc5 at ix.netcom.com> wrote:
 

  Sounds like a lot of trouble when there are a lot of easier alternatives, to me.  Ymmv.
 Sent from my Doofuss Phone.

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