A) To follow up on the recent thread started by me that turned to
tv-reception and splitters, I ended up putting in a 1-2 splitter in my
attic, in place of the old Channel Master 1-4 and later anr Antronix
1-3 that had been there before. So signal strength will be higher.
The picture is good in all ways except for all the white dots
scattered around, which aren't very noticeable on green and yellow.
Thank you for the help. Maybe fixing up the last piece of cable will
get rid of them.

One end of the cable looks good, but for the non-attic end, I had put
on one of those screw-on F-connectors. I thought it might be easier
and very good. Are they inferior???

I'll change it. Some time in the last 25 years, I even found at a
yard sale a quality F-"crimper", so that should help.

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B) The Antronix splitter I have (model number in the attic) which
sells for about $2.50 online and has each output labeled 3.5db iirc.
Others I have, including an Antronix which sells for 1.50 (HS-2A)
don't label the db's and the web advertisements for the HS-2A don't
say anything either. . Are they inferior, more db, and if you know,
is that why they aren't labeled?

I also have a 1-3 Antronix splitter which has all 3 outputs labelled
5.5 db. I thought you guys said that was between unlikely and
impossible that they're equal, and 5.5 is lower than the usual number.
It's model HS-3AB10S , but that gives not a single hit in google nor
at www.antronix.com . There's some reason they don't still make it.
Probably wrong about the dbs.

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C) I'm going to buy an outdoor antenna, but to follow-up a thread from
a month ago, the semi-ciruular antenna which I took off a scrap DISH
antenna, you convinced me wasn't very good, and come to think of it,
it's intended for people who have satellite, and probably don't much
want distant OTA stations, only the ones in town.

Nonetheless I powered the co-ax and connected it in turn to all four
jacks on the attached amplifier. Output 2 actually gets channels 9.1
and 9.2 in DC, which I in Baltmore haven't seen since analog days last
June, and it gets every other station I can get with my 7-foot
straight wire, except channels 66.1-4, which have very little to
watch. So the antenna is better than just a wire.

I thought Output-1 would be the one that actually worked, but it was
just like my straight wire. Input 1 and 2 didn't work at all. In
their case, the word "input" means input from the satellite dish, not
input from the DC power supply.