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From: porter@cbmvax.cbm.UUCP (Jeff Porter)
Newsgroups: net.micro.amiga
Subject: Re: Long Persistence Monitor
Message-ID: <223@cbmvax.cbmvax.cbm.UUCP>
Date: Sat, 10-May-86 23:42:57 EDT
Article-I.D.: cbmvax.223
Posted: Sat May 10 23:42:57 1986
Date-Received: Tue, 13-May-86 01:15:56 EDT
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Organization: Commodore Technology, West Chester, PA
Lines: 39

> > > The claimed resolution is 640 x 480 pixels in interlaced mode.
> > > 
> > > Thos Sumner    (...ucbvax!ucsfcgl!ucsfcca.UCSF!thos)
> > 
> > Actually the problem is that this monitor is TTL RGB
> > 
> > --Chuck
> 
> Thanks for pointing out the distinction on analog vs. TTL. I think the
> point is that long persistence units are being produced at a lower
> price than the previous discussion indicated.
> 
> The difference for changed persistence is all in the picture tube,
> isn't it? Production economics being what they are the chassis for
> several models are probably very much alike.  So getting one of these
> tubes into a monitor with analog amplifiers might be easy.
> 
> On the other hand, the phosphors being used might have sufficient
> nonlinearity to be unsuitable. Do you know anything about phosphor
> theory? I can't claim to.
> 
> Thos     (...ucbvax!ucsfcgl!ucsfcca!thos)

I have spoken with many monitor suppiers about this and they have
all indicated that long persistance monitors are hard to come by.

Another thing which is not helping is the Japanese Yen.  C-A spends
more greenbacks to buy the same number of Yen, therefore most cheap 
picture tubes are not coming from Japan, YET Japan is where all
the technology is for tube phosphors.  And even in Japan they are hard
to come by...korea, taiwan, etc, are a little behind.

We are however in search of the elusive inexpensive long persistance
monitor that doesn't ghost too much.

All this is very subjective.  Does this make any sense?

Jeff Porter
Commodore Engineering