Wanted - 21EP4 (or decent sub)

[nasadowsk]

Hey - I'm looking for a decent 21EP4 or viable sub. This is a 70 degree, rectangular CRT, all glass. I need it for my old GE I'm tackling (Which has a bakelite case - I never saw a bakelite 21"set before...)

Actually, if it's a good one, I'd put it in my Bendix and use the Bendix tube in the GE, since it's semi shot.

No duds - I need a working tube to get this thing going!

Oh yeah, what is it about old RCA pix tubes? Every one I've got is *gone*

[Eric H]

Hello, and welcome to AK!

There is no direct sub for the 21EP4 unfortunantly. I have a Philco that uses that tube. It has a barrel shaped screen that is more or less flat in the vertical plane, like the Sony Trinitron, most other CRTs had a spherical screen. there might be an electrical sub but it probably won't fit the sets masking.

A 21" Bakelite set is pretty unusual, any chance you could post o picture of it?

Eric

[nasadowsk]

Hmmm, I'll have to see if I've got a pic handy somewhere.

It's a weird set - it has UHF on it, but it's from the early - mid 50's. It has a GE model 90 UHF tuner in it, there's a big sticker on the back saying so! The mixer diode is a socketed germanium, I think 1N80 or such.

I got it with a Bendix console. they both sat outside in a guy's driveway for a few years (!), the Bendix didn't work at all when I got it, or so I thought after a quick variac test - I went to yank the HV lead from the CRT and

So, yeah, I fixed that set up and it's nice now, but the CRT's shot on it. Very stable hold, great sound, and 4 IF stages (yep). I had a brightener on it and that helped, but not much. The tube needs a rebuild...

The GE was worse off - the neck was bashed on the tube, and a mouse lived under the chassis for a few years. I actually washed the chassis in the bathtub, and got it, well, cleaner, and de-moused. I figured then I might as well let it sit a while to dry - 2 years! Right now, it mostly powers up, there's HV, there's horizontal, and the audio circuits are working. I sometimes get vert sweep too, and I think the vid / iF stages are ready too, but I still don't have all the tubes in it. I wanna get the tunner going and see if it can at least get a signal and lock the sweep circuits, but of course all the caps need to be replaced still, so i don't expect much.

The cabinet is bakelite, with a cardboard back, and safety glass on the front. It needs a bit of cleanup, but isn't cracked and is quite presentable now. I *am* missing a few knobs off it, I'll have to dig out what I have and see what I need.

But hey, it was a freebie!

I've heard Sylvania liked these tubes a lot, anyone got a 21" Halolight they don't want? Does anyone have a Halolight they DO want?

I'll try to dig up a GE pic later on. For now, I've got a bunch of misc TV and other pics at :
http://users.rcn.com/nasadowsk/pixlist.html
Some of my TV sets are in there, along with an acient pic of my Harley, and a few other things...