PSN-L Email List Message

Subject: Re: Velocity Sensor Designed Specifiically for diff input - Wire
From: ChrisAtUpw@.......
Date: Tue, 16 Feb 2010 08:52:25 EST


In a message dated 16/02/2010, gmvoeth@........... writes:

I have  in the past ( like 1970s ) seen wire that is "like" 40 guage paired 
magnet  wire which was designed to be used with expendable bathythermograph 
 probes.
I have never seen such wire available to anything but  government.
Hi Geoff,
 
    Go to _www.wires.co.uk_ (http://www.wires.co.uk) , select Copper wire 
from the  left column list and then Bonded Bifilar Wire.
    30 AWG is 0.010" dia. 32SWG is 0.0092" dia 
    This is really to thick for winding sensor coils in  my opinion.
    See _http://www.dave-cushman.net/elect/wiregauge.html_ 
(http://www.dave-cushman.net/elect/wiregauge.html) 

Lets say  twin 30 gauge copper wire which is enameled on a 1000 or more 
foot spool  ?

I would think this be the right kind of wire to make a center tapped  
sensor coil ?
    I would just use two reels of copper wire. Cut open  an old aerosol 
spray can and extract the 6" of small diameter plastic tube. Cut  ~3" off this 
and feed both wires through it. Use it to guide both wires onto  your coil 
former as you wind it.
    I am quite happy winding coils of 38 to 40 AWG  wire. It is easy to 
handle and it does not break very easily. If you try to use  1 or 2 thou wire, 
it does get a bit difficult to handle.
    If you buy wire with polyurethane insulation, you  can solder it 
directly with a hot iron - the insulation just melts.
 
    You may need to search for a suitable source  in the USA. 
    _http://www.alliedelec.com/_ (http://www.alliedelec.com/)  stock 36  
AWG Beldsol Magnet wire in 1/2 lb reels.
 
 
Hi  Folks,   In the past I have used 38ga copper wire for making  standard 
magnet coils.   I have a friend who gave me a spool of 40ga  copper magnet 
wire, approx 1lb.


Ted, could you wind off 1 oz reels of fine  wire? This should be enough to 
wind a sensor coil.



Regards,
 
    Chris Chapman





In a message dated 16/02/2010, gmvoeth@........... writes:
I have=20 in the past ( like 1970s ) seen wire that is "like" 40 guage paired magn= et=20 wire which was designed to be used with expendable bathythermograph=20 probes.
I have never seen such wire available to anything but=20 government.
Hi Geoff,
 
    Go to www= ..wires.co.uk, select Copper wire from the=20 left column list and then Bonded Bifilar Wire.
    30 AWG is 0.010" dia. 32SWG is 0.0092" dia
    This is really to thick for winding sensor co= ils in=20 my opinion.
    See http://www.dave-cushman.net/elect/wiregauge.html<= /DIV>
Lets say=20 twin 30 gauge copper wire which is enameled on a 1000 or more foot spool= =20 ?

I would think this be the right kind of wire to make a center= tapped=20 sensor coil ?
    I would just use two reels of copper wire. Cu= t open=20 an old aerosol spray can and extract the 6" of small diameter plastic tube= .. Cut=20 ~3" off this and feed both wires through it. Use it to guide both wires on= to=20 your coil former as you wind it.
    I am quite happy winding coils of 38 to 40 AW= G=20 wire. It is easy to handle and it does not break very easily. If you try= to use=20 1 or 2 thou wire, it does get a bit difficult to handle.
    If you buy wire with polyurethane insulation,= you=20 can solder it directly with a hot iron - the insulation just melts.
 
    You may need to search for a suita= ble source=20 in the USA.
    http:= //www.alliedelec.com/ stock 36=20 AWG Beldsol Magnet wire in 1/2 lb reels.
 
Hi=20 Folks,   In the past I have used 38ga copper wire for making= =20 standard magnet coils.   I have a friend who gave me a spool= of 40ga=20 copper magnet wire, approx 1lb.
    Ted, could you wind off 1 oz reels= of fine=20 wire? This should be enough to wind a sensor coil.

    Regards,
 
    Chris Chapman

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