Hi Chris and All,   Yes I think I can wind off 1 oz reels.   I found it =
impossible to get any copper wire thin enough locally.  You pointed out =
it is avail on the internet.   Again, for those interest in building a =
sensor, and have not found the fine copper wire necessary, email me and =
I will try to help. =20

Ted
  ----- Original Message -----=20
  From: ChrisAtUpw@..........
  To: psn-l@.................
  Sent: Tuesday, February 16, 2010 6:52 AM
  Subject: Re: Velocity Sensor Designed Specifiically for diff input - =
Wire


  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, select Copper wire from the left column =
list and then Bonded Bifilar Wire.
      30 AWG is 0.010" dia. 32SWG is 0.0092" dia=20
      This is really to thick for winding sensor coils in my opinion.
      See 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.=20
      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,








Hi Chris and All,   Yes I think I can wind off 1 oz=20
reels.   I found it impossible to get any copper wire thin =
enough=20
locally.  You pointed out it is avail on the internet.   =
Again,=20
for those interest in building a sensor, and have not found the fine =
copper wire=20
necessary, email me and I will try to help.  
 
Ted

  
----- Original Message ----- 
  From:=20
  ChrisAtUpw@....... 
  
To: psn-l@.............. 
  
Sent: Tuesday, February 16, =
2010 6:52=20
  AM
  
Subject: Re: Velocity Sensor =
Designed=20
  Specifiically for diff input - Wire
  


  
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 =
magnet=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 coils=20
  in my opinion.
  
    See http://www.dave=
-cushman.net/elect/wiregauge.html
  Lets=20
    say 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=20
    tapped sensor coil ?
  
    I would just use two reels of copper =
wire. Cut=20
  open an old aerosol spray can and extract the 6" of small diameter =
plastic=20
  tube. Cut ~3" off this and feed both wires through it. Use it to guide =
both=20
  wires onto your coil former as you wind it.
  
    I am quite happy winding coils of 38 to =
40 AWG=20
  wire. It is easy to handle and it does not break very easily. If you =
try to=20
  use 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 =
suitable=20
  source in the USA. 
  
    http://www.alliedelec.com/ s=
tock 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=20
    40ga 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=20
Chapman