"Ralph Mowery" ) writes:
"Yuri Blanarovich" wrote in message
...
Thanks for pointers, I will have look at references mentioned.
Another requirement would be good handling strong signals, like using 807
:-)

I am trying to build the converter with strong signal handling
capabilities,
low noise and high gain.

Next step is looking at the mixers and low noise synthesizers.

Thanks a bunch!

Yuri, K3BU

You are working at it wht wrong way. The three things you mentioned do not
go together. What you want is somthting with strong signal handling and low
noise. You use just enough gain to override the mixer noise. Then make up
the gain at the IF stages after the filters.


Or, no rf stage at all.

I can't remember what frequency this if for, if it was mentioned.
An RF stage is only needed if there is need, like one needs front
end selectivity to eliminate images or to keep the mixer from overloading,
and the amplification is there to overcome the losses of the filter.
Another need would be that a good low noise stage is needed because
what comes later is too noisy.

Michael VE2BVW