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"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 |
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