The BSA A7-A10 Forum

Technical (Descriptive Topic Titles - Stay on Topic) => Lucas, Ignition, Charging, Electrical => Topic started by: berger on 04.08. 2023 10:21

Title: ohm figures for k2f magneto
Post by: berger on 04.08. 2023 10:21

hello chaps i have read somewhere about the ohms for k2f magnetos but try as i do i can't find them now. can anyone point me to the threads regarding this please?

Title: Re: ohm figures for k2f magneto
Post by: muskrat on 04.08. 2023 10:46

G'day Bergs.
Try this one https://www.a7a10.net/forum/index.php?topic=15270.msg128910#msg128910
Cheers

Title: Re: ohm figures for k2f magneto
Post by: berger on 04.08. 2023 11:36

thanks musking person  *beer*

Title: Re: ohm figures for k2f magneto
Post by: berger on 05.08. 2023 14:41

do i have to unsolder the wires to get a proper reading because of the condenser ?

Title: Re: ohm figures for k2f magneto
Post by: groily on 05.08. 2023 16:04

Nope. You only have to unsolder THAT to get a handle on its capacitance and leak-proofness bergs. (And it's work you don't want unless you have to go there.)
The LT resistance you'll see across the points if they're fitted and open, or from the centre screw 'nut' on the inside to the mag spindle if they're off.
The HT you'll see from the brass bit on the slipring to the armature spindle - or should. The caveat there is if the connection between the spike off the coil that goes into a tiny hole in the slipring is bad. Then you might see Mega Ohms, or Open Line, even if the coil itself is still continuous and in the normal range.

Title: Re: ohm figures for k2f magneto
Post by: berger on 05.08. 2023 20:06

thanks Bill and is a digi meter ok to measure the resistance or do i need a needle dial meter ?

Title: Re: ohm figures for k2f magneto
Post by: groily on 05.08. 2023 21:12

Digi's good, no worries there

Title: Re: ohm figures for k2f magneto
Post by: berger on 05.08. 2023 21:21

thanks Bill i will be on it tomorrow , cheers *beer*