KV5100 & KV5000 Picture Tube Swapping

[Arcanine]

Originally Posted by andy

You'll need to go a little older than the PVM-504 which uses a shorter neck and flatter screen. The one I'm thinking of would be from the late 70's, or early 80's. The one I'm thinking of was a 3 screen rack mount monitor. I'll see if I can remember the model number. Now that I'm thinking about it, I think the black matrix CRTs may have been later replacement parts for these older 5" monitors.

I might have an extra CRT from a KV-5100 if you're interested. I need to check what I have in the parts stash.

If you do I may be interested. I think the KV5000 was one of the last Sony sets where when plugged in and powered off, voltage is always applied to the tube.

Plus I think mine is very high hours. Poor thing suffers the pinks terrible.

[jr_tech]

Originally Posted by Arcanine

If you do I may be interested. I think the KV5000 was one of the last Sony sets where when plugged in and powered off, voltage is always applied to the tube.

I don't think that is so... try an experiment... measure warm-up time under two conditions:

1. TV set unplugged, power switch on... plug in and measure warm-up time.
2. TV plugged in power switch off... turn on and measure warm-up time.

In BOTH conditions, my 5000 takes about 5-6 seconds to produce a visible raster and hits near full brightness in about 10-12 seconds.

I understand that Sony used a *Directly Heated* low power (180 mw?) cathode in these CRTs to achieve the rapid warm up.

jr

[Arcanine]

Originally Posted by jr_tech

I don't think that is so... try an experiment... measure warm-up time under two conditions:

1. TV set unplugged, power switch on... plug in and measure warm-up time.
2. TV plugged in power switch off... turn on and measure warm-up time.

In BOTH conditions, my 5000 takes about 5-6 seconds to produce a visible raster and hits near full brightness in about 10-12 seconds.

I understand that Sony used a *Directly Heated* low power (180 mw?) cathode in these CRTs to achieve the rapid warm up.

jr

From stone cold, and not plugged in the last 2 months, 07.31 Seconds to come completely to life. About 20 seconds to produce a normal picture with no pink.

06.78 Seconds plugged in for an hour, switch off to come back to life.

Timed it with my iPhone.