Very poor choice because the 1N4007 has a structure like a PIN diode and
so is slow to recover at RF, once turned on it makes an attenuator for
many cycles. That and considerable capacitance makes it a killer of
receiver sensitivity used as a clipper.
73, Jerry, K0CQ
On 10/13/2010 10:29 AM, Rick - NJ0IP / DJ0IP wrote:
Agree all points, Jerry.
Why I used 4007 back to back?
I put the darn thing together in a pinch to add in an external RX antenna.
The 4007 were the only thing I had with me.
The diodes were not used for switching, just for clipping.
In other rigs I have used reed relays, keyed by the internal "T" signal to
switch out before the juice came.
I don't understand why so many folks make such a big deal out of the missing
RX antenna.
I have added this to more rigs than I can count.
It's about the simplest mod one can make.
73
Rick
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