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Allen HCCT
Posted: Mon Apr 26, 2021 11:06 am
by FundyTides
I have an old Allen HCCT. When I try to test a coil, I am only getting about 3 volts at 1.3 amps. Is this probably a symptom of weak magnets?
Re: Allen HCCT
Posted: Mon Apr 26, 2021 11:30 am
by Scott_Conger
If the coil is firing, it sounds like everything is fine.
Re: Allen HCCT
Posted: Mon Apr 26, 2021 1:50 pm
by BE_ZERO_BE
Three Volts is typical for the Allen HCCT.
The voltmeter really doesn't provide any useful information as it it the current (Amps) that fire the coil.
I suspect that Allen included the voltmeter more as a marketing decision when they went from the large Jewell meter to the smaller Jewell ammeter.
Re: Allen HCCT
Posted: Mon Apr 26, 2021 4:20 pm
by Adam
BE_ZERO_BE wrote: ↑Mon Apr 26, 2021 1:50 pm
I suspect that Allen included the voltmeter more as a marketing decision when they went from the large Jewell meter to the smaller Jewell ammeter.[/b][/size]
Actually, The Allen HCCT has a provision for load testing the operation of the magneto in a running car via long test leads. That is the main reason it has the voltmeter.
Re: Allen HCCT
Posted: Mon Apr 26, 2021 7:19 pm
by FundyTides
Thanks guys. I mostly just use the machine to entertain the kids with all the sparks but I do test the odd coil. Nice to know it is working as it should.
Re: Allen HCCT
Posted: Mon Apr 26, 2021 11:30 pm
by BE_ZERO_BE
The magneto test as described in the Ford HCCT manual says to connect the car magneto to the HCCT test stand and run the engine at a moderate speed.
The Ammeter should register at least 0.8 Amps.
There is no criteria for a minimum voltage stated in the manual.
This test would be the same on all HCCTs with or without a voltmeter.
The John Regan test does call for a voltage measurement with a specific current load connected to the magneto.