In a message dated 24/12/2009, gpayton@............. writes:

Ted,  Here is a page on Digi-Key  webpage with the resistors Chris 
suggested.  
_http://search.digikey.com/scripts/DkSearch/dksus.dll?Selection_ 
(http://search.digikey.com/scripts/DkSearch/dksus.dll?Selection) 

Hi Gerry,
 
    Check out RHRB-x-ND where x is the value in Ohms ie  10,15, 25
    _http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=66696_ 
(http://search.digikey.com/scripts/DkSearch/dksus.dll?Cat=66696)  Ohmite,  
Huntington, Vishay-Dale, wire wound, bolt on, lug end, 10w, 1%

However, I'd like him to comment on  "wirewound" vs. "composit" regarding 
possible noise generated.  A  wirewound resistor seems to me to be nothing 
but a coil and possible  antenna.  

    You use wire wound resistors to give a high  dissipation and stable 
characteristics. They run quite hot. 
You can buy non inductive wire wound resistors, but they are not  
neccessary. Vishay seem to be the cheapest. 
    I use 1/16" sheet Aluminum.

I wonder if  he meant ac/dc wall wart or ac/ac wall  wart?

    AC / AC wall wort - the cheapest and highest  voltage to suit - 24V? 

Merry Christmas to EVERYONE on the  list.


    Regards,
 
    Chris Chapman





In a message dated 24/12/2009, gpayton@............. writes:

  
Ted,  Here is a page=
 on Digi-Key=20
  webpage with the resistors Chris suggested.  
  
http://search.digikey.c=
om/scripts/DkSearch/dksus.dll?Selection
Hi Gerry,
 
    Check out RHRB-x-ND where x is the value in=
 Ohms ie=20
10,15, 25
    http://search.digikey.com/scripts/DkSearc=
h/dksus.dll?Cat=3D66696 Ohmite,=20
Huntington, Vishay-Dale, wire wound, bolt on, lug end, 10w, 1%

  
However, I'd like him to co=
mment on=20
  "wirewound" vs. "composit" regarding possible noise generated.  A=
=20
  wirewound resistor seems to me to be nothing but a coil and possible=20
  antenna.  
    You use wire wound resistors to give a high=
=20
dissipation and stable characteristics. They run quite hot. 
You can buy non inductive wire wound resistors, but they are not=20
neccessary. Vishay seem to be the cheapest. 
    I use 1/16" sheet Aluminum.

  
I wonder if=20
  he meant ac/dc wall wart or ac/ac wall=20
wart?
    AC / AC wall wort - the cheapest and highest=
=20
voltage to suit - 24V? 

  
Merry Christmas to EVERYONE=
 on the=20
  list.

    Regards,
 
    Chris Chapman