Verifying limp jig

brek81

Built a lim jig, any tips on verifying beyond mesuring resistors and inductors?  

ani_101

where do i get precision resistors for the jig?

brek81

I just used a 1 or 2% dayton fireproof and meaured it with the dmm.  i would post a photo, but havent figured ir out phone wisw

ani_101

dmm? what is that?

PWRRYD

Digital Multi Meter

PWRRYD

ani_101 said:

where do i get precision resistors for the jig?

Buying a few dollars of electronic components and paying ~$7 shipping kinda sucks, but get 1% or 1/2% tolerance metal film 1/4 or 1/2 watt resistors from Mouser or Digikey or Allied Electronics.  If you know some future projects already you can order some of their parts at the same time (power switches, IEC power jacks, etc.) and not feel so bad about the shipping.

JasonP

Not sure you need to do any other verification besides measuring resistors/inductors. You probably did this but I'll mention it anyway - I'd also make sure to measure the leads closed up (empty loop) and get the read on their resistance. LIMP allows you to enter that as an offset for all measurements in calibration.

brek81

Did that, and got me closer to listed specs.

Its kindof cool :P 

PWRRYD

Empty loop?  Do you mean "open loop"?

kennyk

I don't know.................limp jig?

Silver1omo

kennyk said:

I don't know.................limp jig?

LIMP is a module of ARTA:
http://diy.midwestaudio.club/discussion/142/verifying-limp-jig#latest
You can use a cheap jig to measure impedance and T/S.
http://www.artalabs.hr/AppNotes/LIMP_Tutorial_Version_2_4_English.pdf

It actually is very accurate once you calibrate it.

kennyk

I was being..........off color?