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Analog Meter for Old Electrical - WOW!

E

equeen

Member
I've been frustrated the past 2 days dealing with electrical on a Farmall 100. Ammeter on tractor seemed fine with only a little bounce. But, my digital VOMs bounced all over the place so fast I often could just glimple the numbers. Had changed VRs because I "thought" the first was bad, had genny checked by genny guy, checked all grounds, new wires, new battery etc. But, still digital bounce, so I wouldn't run the tractor but a few minutes for fear of burning something up.

Finally went out this AM and found a nice analog with large scale for my old eyes. Priced right, too.

That sucker is great! Smoothes out the bounce and I can see what's going on. 6.3v engine off; 6.8v engine running; 10.0 amps at ammeter. Lights work "and all". Maybe I'm too happy.

Anyway, thanks to all the old timers who have kept talking about analog meters on lots of "electrical" threads. I am now a true believer. AMEN and AMEN!
 
I still have my old trusty reliable Analog Simpson 260 VOM I bought back in High School as I recall. In its day it was like a Cadillac and still to this day its my meter of choice. I also have an RCA WV 38A I believe is the model, I prefer the Simpson 260 but the RCA is a decent VOM. Those expensive fancy schmansy digitals are good for a lot of things I reckon, but for noisey, jumpy, spikey tractor DC (Gennys and bouncing and arcing Brushes and carboned up uneven commutators and noisy chattering VR relay contacts etc etc) GIVE ME MY SIMPSON 260

John T Just an old fashion Conservative old scholl kinda guy
 
I had a Simpson back in the late 60s.
The batteries leaked and ruined it.
Replaced it with a Radio Shack and still have it.
Still have my Sperry amprobe from the early 70s.
 
a great source for a BIG analog voltmeter is to buy one of those 50-100 amp battery load testers in the $25-50 range. clip the two big clamps on the battery posts and read battery ,generator , alternator ,voltage on that big analog meter.
Works good and the leads stay connected all by themselves.
analog voltmeter and battery tester.
 
I have a Very pricy Fluke With certification that dampens and averages well. And several lesser DVMs that are just not usable on the old machines. My old reliable is a RCA VTVM ! My analog meter is a Tripplet with 4 inch face. Gotta love those old test equipment brands. Jim
 
I have an ancient, battered Triplett model 630 VOM (essentially same as a Simpson 260) that serves me well.

I also have a Fluke 87 series III DMM. But for old tractor electrics the old Triplett analog VOM can't be beat!
 
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