Ted,

You have Larry's board, it works fine, why do you want to reinvent something
that is not broken. What feature are you looking for that you need.

Gary

 

 

 

 

From: psnlist-request@.............. [mailto:psnlist-request@...............
On Behalf Of Ted Channel
Sent: Friday, December 17, 2010 4:50 AM
To: psnlist@..............
Subject: Amplifier gains

 

I was telling a friend, I would like to try to build my own amplifier/filter
board.   He is knowledgeable in electronic, and I am not.   So he said he
would help.   His first question was about gain.

 

I told him I did not know what gain we should target, but some of the
schematics indicated a gain of 2000.   He suggested  including a selector
knob, with several gain choices.

 

 

If we were to try is approach, what would be some of the typical values for
gain?    500, 1000, 1500, 2000?

I know it depends on other factors, but I am trying to narrow it down.   We
have a sensor with a strong coil, strong magnets, and are using Chris's
magnet assembly on a 20 second Lehman.

 

On Larry's board, which I love, works perfectly, the gain is selectable
from 200 to 9500?............I use it as it is shipped, so I don't know what
the gain is........but it is perfect for my sensors.

 

Somewhere I have seen an amplifier with a selector knob, for gain, but I
can't find it.

 

Thanks,

Ted

Ted,
You have Larry's board, it works fine, why do you want to reinvent =
something that is not broken. What feature are you looking for that you =
need.
Gary
 
 
 
 
From:=
 =
psnlist-request@.............. [mailto:psnlist-request@............... =
On Behalf Of Ted Channel
Sent: Friday, December 17, =
2010 4:50 AM
To: psnlist@..............
Subject: =
Amplifier gains
 
I was =
telling a friend, I would like to try to build my own amplifier/filter =
board.   He is knowledgeable in electronic, and I am =
not.   So he said he would help.   His first =
question was about gain.
 
I told him I =
did not know what gain we should target, but some of the schematics =
indicated a gain of 2000.   He suggested  including a =
selector knob, with several gain =
choices.
 
 
If we were =
to try is approach, what would be some of the typical values for =
gain?    500, 1000, 1500, =
2000?
I know it =
depends on other factors, but I am trying to narrow it down.   =
We have a sensor with a strong coil, strong magnets, and are using =
Chris's magnet assembly on a 20 second =
Lehman.
 
On Larry's =
board, which I love, works perfectly, the gain is selectable  from =
200 to 9500?............I use it as it is shipped, so I don't know what =
the gain is........but it is perfect for my =
sensors.
 
Somewhere I =
have seen an amplifier with a selector knob, for gain, but I can't find =
it.
 
Thanks,
Ted

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