I have rebuilt many starters and alternators. The starters needed the mica undercut and new brushes, while I replaced bad bearings and diodes in the alternators. I only scrapped one alternator. A wire

If the voltage drops across the fuses don't reveal a problem, then I read that you should check for a stuck relay (most relays are in the same place as the fuses). One person reported that he checked

My last time was on a '66 Pontiac GTO. I found that the battery cable to the starter had carbonized inside a metal tube that was a heat shield. Who would have thought that a cable that large, and

Sorry, I missed that. There's that selective memory again but it ain't me selecting :-( And you got outputs in already. Later I'll have another look at the print ad see if I can come up with any

Smart Man. A variac with a short is not all that it's cracked up to be. The dynamic current limiting of an incandescent bulb is irreplaceable. They are practically bannwd in California but you

There are a few things a good curve tracer (576 or 577) won't test such as turn on time, turn off time, stored charge, and collector to base capacitance to name a few. But I did say the other day that

A quick check of FindChips shows there are probably 4 to 8 MILLION of these on distributor shelves around the globe at the moment. Dennis Tillman W7PF

ON Semicon currently seem to rape the kid. They just discontinued the BAS21, too. Not nice if you have them in a running design, but there is a second source at least. The REAL pissants, however,

Hu Raymond, I have often described the 7S11/7T11 as finicky. Its more than a bit finicky as you seem to feel. After reading your comments I finally went looking for the source of my frustration with

One feature of Tek Curve Tracers is their A/B fixtures. With proper understanding you can compare a known good device (KGD) to a bad one visually. Or selectively match KGDs. Sent from kjo iPhone

A 577 curve tracer is smaller than a 576 and just as effective for what u want. Given audio freq, as Chuck said, u can’t know anything about a power transistor without seeing its characteristics

Yeah I haven't had to chase a phantom drain in quite some time. The cars didn't go to sleep back in those days. --Eric Sent from my Samsung Galaxy S8.

Yes, that works, but now if you interrupt the circuit to install the ammeter, the modules wake up. You want to keep them asleep, at their lowest drain to start. otherwise, you will need to wait until

Looks like the BAV21 diodes have reached EOL. From the looks there is no recommended replacement. https://www.mouser.com/PCN/On_Semiconductor_PD22222X___3.31.18[1].pdf I bought a few hundred.

Have a problem, ask a question. Get the answer, feel dumb. This is a good thing, you already knew the answer, didn't think of it. Easy to fix. If you don't feel dumb, then you have either just

Oh, I know this sort of problem very well - and thoroughly experienced. For a blast from the past, you can see my Escalade battery problem from a couple of years ago. I reported on this a number of

The link to the tables of current in fuses mentioned below is: https://www.powerprobe.com/fuse-voltage-drop-charts/?rq=current Roy Morgan k1lky68@...

Hi Lop Pol, You are exactly right. On occasion you may have heard a loud "snap" and the brightness of an analog TV or scope momentarily dims. This can often be caused by the accumulation of dirt,

Yep, I've found them that way for many years. I used my own method though since I was looking for small phantom amperage drains - remove the fuses one at a time and touch the multimeter leads to the

My "mystery" was a heavy draw that brought the battery down over night. The car was dead two days in a row and needed a jump each day. On the second day I started looking for the problem. Long story