Tweaking a Boatanchor Receiver?

[kd4e]

I just read this post and it got me thinking.
"Drake TR-3 ... with a very hot receiver."

What are the specific features in certain BA receivers
that makes them "hot"?

Is it mostly the tube selection?

Are there other specific things done in the front
end?

Which of these may be duplicated via minor mods to
existing BA receivers to enhance their performance?

Just wondering ...

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Thanks! & 73, doc kd4e

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      KD4E     =====================================
West Central Florida

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