Wow
I rejuv old '20's tubes all the time. I just do it the
old fashioned way. I'm not all that sure adding a PIC to
the process would mean much.
There is no such thing as a "safer & gentler" method.
You need to bring the cathode to a temperature that
is hot enough to bring new material to the surface.
This always has the chance of blowing the filament.
If done right, this can take from 2 to 20 minutes.
I doubt that running it for, exactly, 19.53 minutes is much
different than 20 minutes.
You run it for a while with the higher voltage then
measure the emission. You are the only one that can decide
when it is good enough. How does the PIC know that
the tube will be bright enough? It might even be over doing
it?? Should it be as bright as new?? Should the emission
value be the only judge??
Why is it that everyone thinks that a computer controlled
or LASER light is better than tried and proven methods.
I guess we all just read the labels and except what some
marketing fellow wrote. There are some things a computer
can do faster than me. It is a little more consistent
than me. But it can be consistently bad as well.
I guess if the computer blows it up, you can say that
it was destined to fail anyway.
Anyway, I thought you were talking about one of the old
fashioned tester/rejuvenators. They just had a meter needle
that was labeled red/yellow/green and a push button labeled
Rejuvenate. I guess I'm just out of date. The ones I've seen
didn't have a PIC in them.
Later
Dwight
>From: "Claude.W" <claudew_at_videotron.ca>
>
>Well...newer units use a PIC or similar (probably) and will monitor currents
>and will attempt a "safer & gentler" restoration/rejuv....and will do
>several other tests...
>
>Claude
>http://computer_collector.tripod.com
>
>----- Original Message -----
>From: "Dwight K. Elvey" <dwightk.elvey_at_amd.com>
>To: <cctalk_at_classiccmp.org>
>Sent: Thursday, October 24, 2002 4:53 PM
>Subject: Re: Looking for CRT tester/rejuvenator
>
>
>> >From: "Claude.W" <claudew_at_videotron.ca>
>> >
>> >Hi
>> >
>> >Looking for a "recent has possible" CRT tester/rejuvenator to do work on
>> >several older terminals, monitors and other equip with CRTs I have around
>> >here...
>> >
>> >Borrowing the high $ unit from work is not good for me....Carrying large
>> >monitors into work is not practical...
>> >
>> >Will trade or $s.
>> >
>> >Claude
>> >http://computer_collector.tripod.com
>> >
>> >
>>
>> Hi
>> They can be tested in place. Most rejuvenators just run the
>> filaments at about 1.5X to 2X the voltage while the rest of the
>> voltages are at zero. You can do this with a bench power supply.
>> Dwight
>>
>>
>
>
Received on Thu Oct 24 2002 - 17:32:01 BST