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September 22, 2017, 03:50:46 AM *
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 on: Today at 02:06:45 AM 
Started by ka1tdq - Last post by KC4VWU
Does it have that "smell"?

 on: Yesterday at 10:52:01 PM 
Started by n1ps - Last post by KI4YAN
ABS and VSS sensors, usually run in unshielded twisted pair. Only an problem when the car is actually moving-engine RPM would never affect these, alternator whine wouldn't affect these.

Since these are usually a variable reluctance sensor, as the speed of the car climbs, the output frequency increases AND the output voltage increases, sometimes as high as 100V peak to peak as the speed of the reluctor goes up.

Dunno how your car will react, but try unhooking the sensors one at a time and see if the noise goes away. Normally you wouldn't get noise unless the twisted pair somehow became unbalanced, but it could just be that the twisted pair is not really twisted, too.

 on: Yesterday at 10:06:45 PM 
Started by n1ps - Last post by n1ps
that may be it.  Now where to find them? 

 on: Yesterday at 09:36:08 PM 
Started by ka1tdq - Last post by ka1tdq
You know, that's a good idea.  I used a drill press to carefully eliminate the screw head that was sticking out, enough to get the bottom plate off.  I'll then just file off the remaining screw material.  I'm not interested in machining out the rest of the screw to make it perfect.  I'm not that good enough of a machinist to do it right anyway.  But yeah, doing this much definitely required a drill press.  Doing it by hand certainly wasn't going to cut it. 

But, I did get the bottom plate off.  I've attached a photo.  All original stuff, as you'd expect. 

I guess what makes me happy is having a shelf piece.  My wife asked me if I was going to build a power supply for it and put it on the air.  I said no, and she agreed and said that I'd never get another one of these pieces again.


 on: Yesterday at 09:11:59 PM 
Started by n1ps - Last post by KD6VXI
Wheel static springs.


 on: Yesterday at 08:54:54 PM 
Started by wa2pjp - Last post by steve_qix
Yes, I was very saddened to hear about Larry.  He was a very interesting guy, and we had many QSOs over the years.

He never said anything about the cancer!  Probably didn't want anyone to treat him differently due to the disease.

Larry you will be missed.


Steve C

 on: Yesterday at 08:05:41 PM 
Started by n1ps - Last post by KC4VWU
Remember the old ground straps that attached to the metal bumpers? That was a loooong time ago. Electrical ground paths on vehicles are a very strange thing indeed. Check your battery ground, especially the connection to the chassis, very good. If somehow it has to make the return through drivetrain components, there you go. Really hard on components like wheel bearings and u-joints as well, causing premature failure.

 on: Yesterday at 07:37:29 PM 
Started by n1ps - Last post by n1ps
I have a new... old car...1996 Mercedes E320...gas version.  The drive train has a 10-20 over S9 whine that varies with the speed of the car in motion.  At rest, no noise.  It does not vary with the engine RPMs.  Its worse on 75M and barely noticeable on 160 and 40.  The only way I can test is on a lift.  I have some ideas on how to sniff it out.  But would welcome ideas on what the cause is.

I love 75M mobile...but this is a problem.

This car replaced a E300 which got totalled.  I heard that same whine in that one too but at a very low level and was never an issue.  The same antenna is on this car...an ugly one (but beautiful to me   Grin )



 on: Yesterday at 06:48:09 PM 
Started by KJ4OLL - Last post by KJ4OLL
So I can test a 4D32 in my TV-10

 on: Yesterday at 06:23:21 PM 
Started by ka1tdq - Last post by KB2WIG

Tranny fluid werks ok....  An enjiner I knew use to swear by Diesel.


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