M38 ignition points condensor

[radtech]

Does anyone know the correct capacitance for the M38 ignition points condensor?I have several supposed to be for the M38 but the UF readings varry greatly.

[radtech]

Found it in the Auto lite elect TM. .18-.21UF

[RonD2]

And .18 to .23 microfarads in the Prestolite Bulletin in this old post: http://willysmjeeps.com/v2/modules.php?name=Forums&file=viewtopic&t=12977&highlight=farad

Curious--- what kind of capacitor tester are you using?
_________________
Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

[radtech]

ZM3/A

[radtech]

ZM3A/U

[RonD2]

Wow, that's quite a nice museum piece --- a vintage 1950's vacuum tube capacitance tester.
Where did you find it?

I looked through the manual here: https://www.radionerds.com/images/5/5f/TM_11-5043-12.pdf

Seems like automotive caps might be right on the spec limit for testing, with possibly a rather large accuracy range greater than 10%.

Being with vacuum tubes, has the analyzer been calibrated recently?
In other words, how do you know it's operating correctly?

Many things could account for the great variance in readings you're seeing.
_________________
Ron D.
1951 M38 Unknown Serial Number
1951 M100 Dunbar Kapple 01169903 dod 5-51

“The only good sports car that America ever made was the Jeep."
--- Enzo Ferrari

[radtech]

it is calibrated to the TM and there are no varriations in readings.New caps test perfect.New ignition caps with the same part number test the same.New caps tests varried with different part numbers .I got it years ago for WWII radio restorations.