"Roy J. Tellason" wrote to "MIKE ROSS" (07 Jul 03  20:01:15)
 --- on the topic of "VCR"

 RJT> MIKE ROSS wrote in a message to Phil Marlowe:
 MR> My old tv has 3 a/v inputs but you could add an A/B

 RJT> We have *one* tv here that has a/v inputs,  and that's it.  Lots of
 RJT> other,  older stuff besides.  I used to think about trying to modify a
 RJT> set to add such inputs,  but what with hot-chassis designs and other
 RJT> considerations,  it always ended up looking to be more hassle than it
 RJT> was worth.  Particularly considering that what I was looking for was
 RJT> something to use for a monitor.  I now have plenty enough monitors
 RJT> around...    :-)

The old tv was found curb side a nice Toshiba but it had suffered a
catastrophic melt down around the horizontal output transistor (HOT).
The main circuit board had a hole burned out of it the size of a dollar.
I suspect it was a cold solder joint that burned up the board. Amazingly
because the HOT was heatsinked it wasn't even damaged, as I measured
good gain and no leakage at all! So I cut away all the carbonized main
PCB, drilled 3 holes, and just wired jumpers from the good traces
directly to the HOT's pins (with a little dressing on the side ).
It worked first time though there were the usual weak electros in the
vertical as Toshiba likes to mount 85'C caps right next to heatsinks.
It's amazing how long an electro takes to dry even next to a heatsink,
the best way to ensure killing a TV just as the guarantee runs out. 

 Mike
 ****

... FIDO lie #XVI     My sysop enjoys reading all my posts.
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