[AT] EVENING UPDATE

[deanvp at att.net]

If there is long term continuity between the points when they are open you
have a bad condenser.

Dean VP
Snohomish, WA 98290

-----Original Message-----
From: AT <at-bounces at lists.antique-tractor.com> On Behalf Of STEVE ALLEN
Sent: Monday, May 11, 2020 7:33 PM
To: at at lists.antique-tractor.com
Subject: Re: [AT] EVENING UPDATE

OK, gents:  here is what I found tonight:

The condenser has NO continuity between its case and the terminal.  With the
wires removed from the screw terminal on the points, the two parts of the
points have NO continuity between them.  

For those familiar with WICO X mags, the points are connected together by a
screw that holds the spring for the moving point in an insulated block on
the frame of the lower, non-moving point.  Two wires are attached to that
screw.  One comes from the condenser; the other comes out of the coil.  THAT
wire in my mag has continuity with the case of the mag.  There is NO
continuity between it and the center contact on the coil itself.  

If the condenser is bad, continuity between its center terminal and its case
is NOT the failure mode.  

The points have continuity between them when open ONLY when the wire from
the coil is attached to them.

That's all I know new tonight.

The "original" Steve Allen


----- Original Message -----
From: STEVE ALLEN <steveallen855 at centurytel.net>
To: at at lists.antique-tractor.com
Sent: Mon, 11 May 2020 17:39:06 -0400 (EDT)
Subject: Re: AT Digest, Vol 28, Issue 7


----- Original Message -----
Message: 7
Date: Sun, 10 May 2020 19:53:23 -0500
From: Phil Auten <pga2 at basicisp.net>
To: at at lists.antique-tractor.com
Subject: Re: [AT] Project Updates '49 A, '51 A, and '47 B (STEVE
	ALLEN)
Message-ID: <168f1f90-8d7a-1eef-e95e-28fb0fa7e41b at basicisp.net>
Content-Type: text/plain; charset=utf-8; format=flowed

'49A - If your points are clean and reading .5 ohms when closed and .7 ohms
with cardboard separating the points, your points are shorted. With the
cardboard in, they should read an open circuit, and .5 ohms when closed says
your contacts aren't making contact well. If you took those measurements
with the points installed, disconnect them and retest. If the points read
0.0 ohms closed and open circuit with the cardboard in, then the problem is
elsewhere.
'49 A: I forgot to mention, if the points measure correctly outside the
distributor you may have a bad coil.

Phil in TX

Phil,

Remember that the points set in a Wico X mag is two separate pieces.  If I
take them off, I can screw them back together and check for continuity, BUT:
while mounted in the mag, the fixed one is in contact with the case of the
mag, and the other, the one that moves, is in contact with the terminal of
the condenser.  Now, let me speculate here:  
the terminal in the condenser does not touch the case of the condenser,
right?  So, the two points should not have continuity because the one is
connected to the terminal and the other is "connected" (through the case) to
the mag case.  UNLESS there is continuity inside the condenser.  I do not
understand condensers well at all, but *SHOULD there be continuity between
the case of the condenser and the terminal of the condenser*?  
If not, that may well be my problem (per Cecil).  I will investigate
tonight.

BTW, I know that the shaft is turning and that the points are opening and
closing:  I have verified that much by turning the crank.

The "original" Steve Allen
Who is avoiding the local Menards



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