Multiple receivers

[KM1H]

bull shit

Is that something like bovine effulent Frank   Man, you been on a tear lately, that Emtron thread must have you at an all time peak

Yep, there is nothing wrong with a splitter and active devices. The problem is the person building them without a clue.  A microwave circulator at HF....Jeez thats a new one for the Darwin award.

Carl

[WA1GFZ]

Carl,
You should see the sign the XYL gave me for Christmas.
Man I would love to see an HF circulator.  I wonder if it would fit in the shack.
We need a new thread. Gary could call it the most stupid advice thread.

[WA1GFZ]

I see, kind of like a "key hole bird"


Mr Mike, I forgot that word you taught me Saturday

[WA1GFZ]

no thanks my method works fine and has plenty of port to port isolation
I bet that charge pump does a number on th enoise floor

[KM1H]

How did we get from someone whining about active devices to a 3 device noise source?

In the real world, unless you are using some POS radio without a tuned RF stage or a regen, then port to port isolation of a ferite toroid splitter will give 30-50dB of isolation. Ive yet to find a spur from any radio connected to my simple passive splitters pass thru to another radio.

Carl

[Steve - WB3HUZ]

Filter? Show me a filter that can remove the noise from your circulator but allow signals of interest through. Such a filter would make you a rich man. Despite your claims, deferring to magic is not making your case.

[KM1H]

That circulator isnt the only noise source here

Carl

[WA1GFZ]

elmer material

[KB2WIG]

 " I don’t remember when the FCC started cracking down on what those levels could be, but many of the old tube receivers would never pass FCC type certification today. "

Its to stop them ruskies from finding us.

klc

[KM1H]

I don’t remember when the FCC started cracking down on what those levels could be, but many of the old tube receivers would never pass FCC type certification today.

When you stopped using the Ocean Hopper regen and upgraded to a S-38/SW-54


German subs could detect ships using regens and poor reverse isolation RF stage superhets. Adding a 2nd RF stage to several existing sets or adding shielding eliminated the problem, the National RAO is a good example of the added RF stage. Using a good splitter does the same if not better. A resistive splitter doesnt hack it, you need a Wilkinson style device as then the out of phase signal from the other port(s) is dumped in the terminating resistor. Same concept as used in the 4 Square vertical arrays.

Carl