Emerson 609 projection TV

[Samuel1981]

Update?

[batterymaker]

Anyone see this? Perhaps a cheaper way to get your mirror re-done

https://www.youtube.com/watch?v=z8iTQwnDaLg

[Eric H]

Originally Posted by batterymaker

Anyone see this? Perhaps a cheaper way to get your mirror re-done

https://www.youtube.com/watch?v=z8iTQwnDaLg

The problem with that is the mirrors in a projection set are on the surface of the Glass, that is behind it.

[Tom Albrecht]

I had a mirror resilvered (or more precisely, re-aluminumed) for my Philco projection TV. This outfit does a good job, and won't break the bank. You'll see they show prices right on their website: http://www.spectrum-coatings.com/

The symptom of a bad mirror is poor contrast. Too much light scatters off the rough and dirty spots on the mirrors, putting some light into the dark areas of your picture that doesn't belong there. It will not cause bad focus, so that is a separate problem to be worked out.

Here's a thread on ARF from when I got my mirror recoated: http://www.antiqueradios.com/forums/...524069#p524069

Later I made some further improvements to the set, that resulted in better pictures than I showed in the thread linked above.

[Phil Nelson]

Thanks for the info. We have been away on vacation, but I will probably get a chance to open up the optical box this weekend. I suspect I'll send off the mirror for resilvering.

Apart from that, the TV still needs more work on the focus and horizontal sweep sections.

Regards,

Phil Nelson

[Samuel1981]

Keep chugging along! This is one of the prettiest of the projection sets.

[Phil Nelson]

Well, I got the 45-degree mirror out. Kind of a tricky process. First, you remove the side panels from the box:



After removing four nuts, you can draw out the entire tailpiece assembly (including CRT) from the rear:



Use care when sliding out this heavy assembly. Judging by some little nicks around the hole edges in the 45-degree mirror, this CRT was replaced in the past.

The spherical mirror must come out first, to make enough elbow room to withdraw the 45-degree mirror:



You must unscrew the 45-degree mirror clamps from the slanted rails, and then remove the clamps from the mirror. Then with some cautious jiggling and sliding, you can slip the mirror out the side of the box:



The reflective surface looks pretty bad, so off it goes for resilvering:



The spherical mirror looks much. much better, so I may try to use it as-is.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[Phil Nelson]

Is there a way to test my 3NP4 CRT? My Sencore CR70 manual doesn't list settings for it.

The CRT is obviously good enough to make some sort of picture, but it's hard to judge its performance by looking at that tiny CRT face, and I can't view the full image at all, while the mirror is off for recoating.

The turnaround time for recoating is something like 30 days, so I'll try to make progress in other areas in the meantime. I hope to be able to address the horizontal issues by viewing scope forms and peeking in at the CRT face.

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html

[Tom Albrecht]

That looks a lot better!

[Phil Nelson]

Sigh. I was full of hope when I reinstalled the recoated mirror, and then things began to go south. At first, the only problem was (still) bad focus, and when I changed one resistor in hopes of addressing that issue, the image size suddenly shrank by about half.

You can read more (much more) by looking at this article-in-progress; it includes links to the full Riders and Sams service manuals, as well as a pretty full recap (get it?) of what work I've done so far:

https://antiqueradio.org/Emerson609P...Television.htm

Scroll down to the end if you're impatient and want to know where things stand at the moment.

Has anyone restored an Emerson 609 before? I'm fairly confident about the electronic side, but the Norelco Protelgram optical box with its mirrors & lens & whatnot is new to me.

I'd appreciate any advice from someone who has tamed one of these beasts. At this point, my plan is to move all the chassis back onto my workbench and start looking for a cause of the sudden reduction in image size. You can see on the CRT face that the image is smaller than normal, so I assume the problem is on the electronic side, not in the optical/mechanical parts.

Thanks!

Phil Nelson
Phil's Old Radios
http://antiqueradio.org/index.html[/url]

[vts1134]

Hang in there Phil, this is the toughest phase of a restoration...pulling the chassis back out . We've all been there and it's no fun. Keep at it and you'll tame the beast!

[Eric H]

At least the CRT looked like it was bright when it was working.

I have an RCA Projection set that I've kind of lost interest in, it's such a nightmare dealing with all the chassis's (Chassi?) in the darn thing, plus having to trying to carry the barrel along with the sweep chassis since they can't be easily separated.

[Crist Rigott]

Hang in there Phil. Your articles have helped a lot of people. I'm confident that you'll get it fixed and it will be working great.

[old_coot88]

Since both H and V sweep are reduced equally, seems like the fault would have to be B+ related and pretty easy to nail.

[Phil Nelson]

Check B+ . . . We hear and obey (tomorrow).

Thanks,

Phil Nelson