Eric Foster CS-6

[Anonymous]

After replaceing all fets in CS the pulseing stoped,it worked OK for a fue days.dept droped from 13" on a US nickel to 4" air test,up to 6" now.
(U4) IC- TL062, pin 5 and 6 have no voltage,pin 7 has .01 volts.when you get some free time will you tell me what voltage should be at pin 5-6-7 (U4)IC-TL062. Newforce CS-6.
Also I like to try a different fet,can you recomand a good fet to replace Fairchild J133 fets.
Thank you. Frank.

 

[Anonymous]

I gave you wrong fet number. its J113.

 

[Anonymous]

Hi Frank,
Pins 5 and 6 are inputs and will only have millivolt signals on them. Pin 7 is the dc output, and with no signal, will be sitting very close to 0V. There probably are equivalents to the J113, but there is no need to change to anything else. I've used them for years with no problems.
Eric.

 

[Anonymous]

Thanks Eric, I found a hair line crack on one of the metal strips bottom circuit board, repaired it.dept is back to 13"+ air test on US nickel,10" coil.some of pulseing is back,threshold not to good.I will keep at it until I get it. Thank's again for your input.