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Sony also had issues with capacitors over the years. The CRT Watchman TVs generally worked well, but their LCD Watchman sets have major capacitor issues - FDL-310, FDL-320, FDL-370, FDL-380, FDL-3500 all die from bad SMT Can Caps. I have several of these models, and they are all bad - I will not buy anymore of them because of this, way too much trouble to replace these caps.
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i still wonder how those beams are directed in a flat crt. its just amazing how they did this with the gun straight in and the screen tilted a few degrees and a pic is there.
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The screens in the CRT Watchman sets are not flat, they are sloped, and the beam is scanned with a standard magnetic deflection yoke - very complicated geometry though.
The real marvel was the original FD-210 CRT Watchman that did have a true flat screen - it used electrostatic deflection, and the geometry was much better than in any of the later models with the sloped screens. |
I remember buying a Sony FD-2 or somesuch 1986,'87, maybe '88, & they had 'em on a "Hanging" rack in a blister pack...Think I gave $35 or so for it...It was the El Cheapo version, no AC plug or ext antenna connection...Cute toy, it did pretty good in a big town, but not so much out here in the Tuilies...
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I remember those. I bought my first CRT Watchman (FD-10, maybe) in 1992 from a garage sale for $5 - it was in pieces - I reassembled it, and it did not work, fried voltage regulator chip - I guess that they used the wrong adapter, and then someone tried to repair it. I did fix it, but was not impressed with the geometry - ended up giving it to someone. I did not buy another 1 of the later generation models, but I did finally buy an FD-210 original model - very happy with it.
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I have a FD-20 that I use for a portable analog test monitor for video paths. I threw a cross-hatch in it once and if it was a car it would have been pulled over for DUI. Movement on the screen hides a lot of sins.
I also have a FD-210 and I had to go look and never noticed the pure flat screen vs. the tilted screen. Now I have to throw a cross-hatch on it and see what happens. I'll try for comparison pix. |
I run an 'ol FD10 in the front room just to turn on and see the inhouse transmitter and it's media player are still running (both run 24/7). The FD10 is the one with no AC adaptor...so it just sits in the front room on the coffeetable.
A crosshatch on an FD10 looks like BEER GOGGLES. Its a wonder that regular motion video actually does look okay on the little thing. A couple 42A sets I have do have "better" geometry, but they are still a bit strange. I did notice the 42A sets have BETTER geometry running on a wall wart than even a fresh set of C batteries. |
I think that the FD-10 was the cheapest model that they made - and it looks like it is too.
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http://www.videokarma.org/attachment...2&d=1343766112 jr |
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FD-20 and FD-210 pix below. The 210 wins and I cannot figure out how they did the sweep. If you look at the edges around the screen there are three little ports. Two above the screen and one to the lower right. Not sure what they do but they have to play a part. Dilithium beams maybe? Now I gotta try the Pana CT-101 color.
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The FD-20 doesn't look too bad - I had a lot worse on the 1 I gave away, severe pincushion and trapezoid deformation. The FD-210 looks very good.
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The FD-230 is a good set, solidly built and with a 2.7 inch screen. |
does anyone know if the plastic front cover can be removed for dust cleaning on the sony fd-10. i know the fd-20 has 2 screws to remove the front for cleaning. i dont want to pry on the fd-10 and break the front.
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jr |
well its not that bad with dust or dead bugs so ill leave it, thanks.
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i noticed that on the fd-10 when the back is taken off extreme care must be applied in putting the back, back on because the micro switch for uhf-vhf broke when i put the back on as i didnt line up the position of the swich relative to where the slider is on the cover. the micro switch has a very thin plastic tab and will break if you look at it the wrong way,lol as mine broke. so i put a little crazy glue to keep the switch in the vhf position.
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yes i found that the plastic is infact soft. well the cheapest way to make them, they did.
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But how in the world they made the deflection when the gun was underneath?
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jr |
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If you had asked a few months back I'd have given you a working Sony paddle CRT set for the cost of shipping. |
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The first generation design employed a flat phosphor screen at 90 degrees to the electron gun. A combination of magnetic and electrostatic deflection was used to achieve proper landing of the beam. http://www.videokarma.org/attachment...5&d=1256418738 jr |
Were any of these micro sets made with electrostatic crts ?
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http://www.videokarma.org/attachment...7&d=1256418738 post #3 : http://www.videokarma.org/showpost.p...14&postcount=3 jr |
I guess that would be the tube in the center ?
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Yes... notice the fat neck needed to enclose the deflection plates vs the skinny necks with magnetic deflection yokes mounted on them.
Fyi, there is a Sinclair set on eBay right now: http://www.ebay.com/itm/SINCLAIR-MIN...oAAOSwiONYLirh not affiliated, jr |
Would that one have the electrostatic tube or would it have been in an older model ?
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Yes, the set is the same model as the one that I got the electrostatic tube that I photographed out of.
jr |
I ended up finding your threads after I posted last night and found them very interesting and helpful. My plan is to make an animated face for an old 80's robot, so perfect geometry is not required. I just need the image to show up in a predictable spot and be able to fill up nearly the whole screen. I will also be displaying some text/gui occasionally, so I want that to be somewhat square.
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I wonder how well these flat tubes would've worked as beam index tubes...
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I have found that aliexpress is selling flat 4 inch CRTs with driver boards. They have 2 manufacturers, Tosho or sony. The tube looks to be well made. Mind you, it does need the end user to supply the brightness pot and the contrast pot. there is a little bit of distortion near the bottom, but i suspect that's down to the type of tube.
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I have a FD-2B.
I'm looking for other models, but alas in the UK, there isn't that many around at reasonable prices. Brian |
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https://www.aliexpress.com/item/1005...archweb201603_ jr |
Okay yeah those did not show up when I tried searching, sorry.
Otherwise that price is bang-in for messing around with them. :thmbsp: |
see below post.
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I ended up buying two.
For whatever reason the seller you linked to refused to ship until I paid an extra $10 in shipping. In all I paid nearly $60 in shipping. The other dude I did business with (same tube but no bracketing) was a lot easier and cheaper to do business with. |
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