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  #46  
Old 09-08-2012, 09:27 PM
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Quote:
Originally Posted by crtfool View Post
There should be a separate battery to operate the clock on the FD-3A.
Yes! I just got the contacts cleaned up enough to get the clock working, but all that I can get the alarm to do is beep (fairly faint and high pitched). I don't see a mode for clock-radio (or TV) operation.

jr
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  #47  
Old 09-08-2012, 09:37 PM
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It's probably just a convenience clock - not meant for TV / Radio operation.
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  #48  
Old 09-09-2012, 01:00 PM
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Zenith "Watchman"

A fairly recent find. It is identical in layout and control functions to the Sony FD-40A, but differs slightly cosmetically. It is not "made in Japan", but is labeled:
Quote:
Zenith Electronics Corp. Glenview Illinois 60025 U.S.A.
Assembled in Mexico
It is a decent performer, similar to the Sony-made products. Model # BT044S, assembled Nov. 1985.
jr
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Last edited by jr_tech; 09-09-2012 at 01:24 PM. Reason: add model #, assy date
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  #49  
Old 09-09-2012, 05:28 PM
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COOL!

Saw one of those on the ebay about a month ago....but it had a VERY odd "cone" shaped raster. I was a bit afraid of it because it was obviously a horizontal problem...but with the added festivities of working with that right angle geometry. It was small at the top and bigger at the bottom. My guess was it would have been an EXTREME simple width problem on a regular CRT....but was showing as a trapezoid.

There must be some really weird custom horizontal treatment in these.....like a trapezoidal raster custom to look square on these tubes. I have NEVER had to work on one of these beyond the usual little turning of pots. I think one of the pots in the 42A even messes with trimming this trapezoid geometry. My pink 42A was perfect...but I did open it and mess with it just for fun (It's of course back to normal again)
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  #50  
Old 09-09-2012, 05:36 PM
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I have a 4" one of these things, mine is branded "Magnavox", however. Pretty decent picture, all in all.
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  #51  
Old 09-09-2012, 06:23 PM
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They are neat Sandy.....Just don't ever put a crosshatch on one. You will then FOREVER know these are FAR from perfect. Still a marvel that they even CAN do this geometry trick and pull these off. I use my little Sony 10A in the front room quite regularly to just check that my "in house" station and the little Archos media player are still up and doing okay. I really only need a couple examples of this "paddle" CRT...so I only have a 2A, 10A and the pink 42A. I may sometime go looking for one of the "electrostatic" ones (230?)...so I'll then have the "real" flat example.

I do NOT yet know what the term "electrostatic' means in a CRT....for everything I have is just electromagnetic with yokes. I had NEVER heard of electrostatic until I went through that BIG long thread on the different small screens.
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Last edited by AiboPet; 09-09-2012 at 06:28 PM.
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  #52  
Old 09-09-2012, 06:29 PM
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I had 1 of those 2" Watchman models with the slopy screens - drove me crazy, and that was without knowing what a crosshatch looked like. The only model that I now have, and like, is the original FD-210 with the true flat screen.
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  #53  
Old 09-09-2012, 06:42 PM
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The little Sony 10A is one of those "slopy" (and "sloppy") 2" Watchman sets. I thought something wasn't quite right with it.....and then put a crosshatch on my little media player/transmitter to see what was up. Luckily....I ran into the thread here about these having odd geometry before tearing into it thinking it was supposed to be perfect.

My first thought when I saw the problem was "Oh jeese...It's a SONY, so OF COURSE it's supposed to be perfect...and this one is broke".

Now.....I realize it's meant to be a small portable set, and nobody really should be watching these and being critical with the picture. I still find it amazing they can accomplish a (relatively) square picture that IS focused both top and bottom with the phosphors at that angle. This "magic" makes me afraid to really work on one, since I don't see anything to read on how they accomplish the trapezoidal raster....and focus being (again..relatively) sharp both close AND far from the gun.
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  #54  
Old 09-09-2012, 07:15 PM
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Here is a "2 inch" Magnavox labeled "ESCORT 2" Model BF3900BK01. It was "Made in Japan" in March 1985 and closely resembles the Sony FD-20A. It lacks the "video input" jack, but otherwise controls and jacks are in the same locations as on the Sony.
Sandy... Is the "4 inch" Magnavox labeled "ESCORT 4" perhaps?

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  #55  
Old 09-09-2012, 08:22 PM
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Quote:
Originally Posted by jr_tech View Post
Here is a "2 inch" Magnavox labeled "ESCORT 2" Model BF3900BK01. It was "Made in Japan" in March 1985 and closely resembles the Sony FD-20A. It lacks the "video input" jack, but otherwise controls and jacks are in the same locations as on the Sony.
Sandy... Is the "4 inch" Magnavox labeled "ESCORT 4" perhaps?

jr
Aye-yup...Terry gave it to me, for being such a NICE customer, I guess...Mine HAS the video jack "A/V in", as well as a 6VDC input. It has the Knoxville, Tenn address for "North American Philips Consumer Electronics Co." & a May, 1985 build date. Kinda hefty l'il beastie when loaded up w/4 "C" batteries.
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  #56  
Old 09-11-2012, 02:47 PM
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Collecting sets that size you guys could easily have 50 of 'em and keep the entire collection on one shelf in a closet.......

In one of the pictures posted there are 4 tubes of different sizes, Jr_tech, it was your picture, front and back of the 4 size screens. I was wondering can you re post those pictures with indications of where the HV lead goes? and those of you with working sets, what is the HV voltage? Also wondering since the screen does not need to be transparent, is the screen energized with the HV? can you tell by looking?

And if you just want to get a flat tube, there is some guy on ebay trying to sell them for just a few bucks... $14. I think.... I've seen them a few times...
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  #57  
Old 09-11-2012, 03:00 PM
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I scored a Sony 2" at a pawnshop once for $20 or so, & it even worked...It was the "Basic/basic/basic" model-No antenna or power inputs, no contrast, just channel-UHF/VHF switch, rotary knobs for tuning & volume. L'il sucker DID have a pretty decent picture, & could pull in stations pretty good.
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  #58  
Old 09-11-2012, 03:46 PM
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@Username1....

The HV connection point can best be seen on the picture of the back of the tubes:



On the 4" and 2" CRTs the connection is on the right side of the funnel flare and in both cases located almost directly above the center of the deflection yoke. You should be able to see the HV button easily on the 4" tube, but it is more difficult to see on the 2" version.

On the 2.7 " tube, there is no funnel HV connection. Pin 1 of the CRT is somewhat isolated, and used for that purpose. Pin 1 is on the left side of the tube in the photo and if you look closely, you can see a small patch of white (rtv?) material used to provide insulation around the pin.

On the early 2" tube (ED-15), a black three pin connector juts out of the left side of the tube in the funnel flare region, providing connection for the 2 deflection plates and HV.

I'm guessing that HV was on the order of 1.5Kv on the smaller tubes and perhaps 3kv or so on the 4" tube, but this is only a WAG. The screens appear to be connected to the HV.

jr
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  #59  
Old 09-11-2012, 04:15 PM
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I would agree with your guess of around 1500 - 3000V from what I have seen on 3" tv's. I was interested to see if they did the HV button on the side of the tube like the big ones.

now I kinda want one....

Thanks jr.
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  #60  
Old 09-11-2012, 04:45 PM
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The little shittin' things DO have a way of "Growing" on ya...(grin)
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