ok...opened. For the lift of me didn't suspect that blob was a cover,
but rather an alignment peg or something. Based on some past experience
I would have to think.
Yes, it certainly is non-obvious :-)
Do I now cut the tie wraps, or attempt to get a skinny phillips to
remove the screws securing the tube to the bezel? And once the tube is
exposed and cleaned up, I can epoxy or simply hot glue maybe any piece
of plexi/lexan to the face, no? Thickness?
When I dismantled on of my VR201s to clean it, I am sure I remvoed the
pCB on its own, then the CRT.
From what I recall, I discharged the CRT anode
connector to the outer
coating using my EHT meter (it's the Heathkit one,
nothing more than an
800M reissotr in series with a 50uA meter. As well as measuring EHT, it
makes a good bleeder for such things) and then remvoed the anode cap from
the CRT. Unplugged the CRT base conenctor next. I can't remember how the
yoke is conencted,m if it's a plug nand socket, just unplug it, otherwise
I'd desolder the wires at the PCB end.
Once the PCB is out, I think you remvoe 4 smore screws to seprate he
chassis and CRT from the bezel.
Cable tiies are fair came to be cut off :-). But I always keep the oens
I've cut off until it's all back together so I rememebr to refit them.
Some people take a photograph of the unit to remind them where to put
cable ties, clips, etc. Not having a digital camera, I rely on memory.
As for the CRT, Ron Smallwood assures us that it's safe without the front
faceplate. He is probably right in this case, there is the tension band
as well. It's up to you.
If you do decide to put something over the front of the CRT, there are
basically 2 possibilites. The first is to reuse the original glass
faceplate _if you can get it off in one piece_. In this case to get
improved safety to have to bond the 2 layers of glass together. It works
like a car laminated windscreen. I would think one of the optical
adhesives used for cementing compound lenses would be the thing to use,
the modern ones cure under UV.
You could also fit a separate safety sheiled. This has to be soemthing
that won't shatter -- Perspex (Lexan) would be an obvious choice. I
rememebr TV sets in the early 1960s (before the introduction of CRTs with
laminated screens or tension bands) that had a piece of perspex about
1/8" to 3/16" thick in front of the CRT (Older sets had a sheet of
laminated glass for this). Thr disadvantage of doing that is that you'll
get multiple reflecitonbs between the CRT screen and the safety shield.
It's up to you.
If Ron is right, and the only reason for the second glass leyer was to
meet a legal requirement rather than to actually make it safer then
actually, I see no reason to leave it out. I just hope he _is_ right ...
-tony