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#16
03-18-2021, 04:59 PM
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21EP4 isn't that much of and oddball. I have a set with one, and found a spare fairly easily. The set (Bendix!) has a NOS Sylvannia (still had the cap and warranty card). Nice picture. Oddly, I aligned it using the 'meter method', instead of a sweep alignment (it wasn't really off anyway). Best picture of any set I have, though it tends to have a bit of color subcarrier in it. I wish I could get my cable box to give a signal with no color subcarrier...
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#17
03-19-2021, 02:20 AM
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Quote:
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#18
03-20-2021, 02:56 PM
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Quote:
https://i.imgur.com/hcwNMTu.jpg it USED to have casters.... https://i.imgur.com/HCMc3dY.jpg not too bad looking https://imgur.com/V9qORzf now the VERY BAD NEWS... https://i.imgur.com/Q4LSddi.jpg I have no option but to get an 21XP4 from ETF and adapt it to fit and work, i wont find a 21EP4 for it. that is for sure. It will be tricky, but it can be done...
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#19
03-20-2021, 03:58 PM
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Quote:
(I've not done the modulator thing before..)
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#20
03-20-2021, 04:46 PM
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Quote:
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#21
03-20-2021, 06:58 PM
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The sad state of the former 21ep4b https://i.imgur.com/pXE3HJm.jpg you can almost see the numbers on the socket!
working on getting a replacement. my cat has to check it out, of course.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#22
03-20-2021, 07:50 PM
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It's a shame it's in that state.
I probably wouldn't have paid money for it if I saw it was necked...the CRTs are worth as much as a good restorable set so unless the set is REALLY special it doesn't make sense to dig that financial hole.
__________________
Tom C. Zenith: The quality stays in EVEN after the name falls off! What I want. --> http://www.videokarma.org/showpost.p...62&postcount=4
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#23
03-20-2021, 08:41 PM
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Quote:
 I just don't want to quit at just hardly starting.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#24
03-20-2021, 10:00 PM
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I'm also thinking about the 21AWP4 as a replacement.
it is NOT a 70 degree tube but a 72, not sure if that will matter or not, but ETF has one, it IS magnetic focus, and has a screen size close to the 21ep4b, I'm really not sure when it comes to finding a sub for these things. electronically, it looks the same, if it WON'T work due to the diff in angle I will go with the first choice of the 21xp4. 
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために Last edited by Yamamaya42; 03-21-2021 at 11:02 AM.
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#25
03-20-2021, 11:02 PM
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unbelievable...
 https://i.imgur.com/VqENg46.jpg i have done nothing to this chassis yet other than a slow power up!
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#26
03-21-2021, 01:21 AM
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And so it has begun, a quick test with the 8yp4 test CRT showed me I had good HV and horz sweep and NO vert, I thought OK, most likely due to bad caps, but I did see that some work in the area had been done before. After a bit of poking around, found OK voltage on the plate of the Ver output, but in the plate of the Osc, nothing... 0 volts.
Which was tracked down to a bad Osc transformer one winding is 1k,, the other SHOULD be 200 ohms, wide open... already found a new one. what I'm facing getting a replacement CRT what was in there https://frank.pocnet.net/sheets/093/2/21EP4A.pdf As mentioned, this is a magnetic focus 70 degree tube one option https://frank.pocnet.net/sheets/093/2/21XP4A.pdf another 70 degree tube but electrostatic focus and slightly smaller dimensions the other option https://frank.pocnet.net/sheets/093/2/21AWP4.pdf this is a magnetic focus 72 degree tube which seems to have exact electronic footprint of the original tube but has slightly larger dimensions ( can also be made to fit ) Choices choices :O
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#27
03-21-2021, 07:26 AM
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its obvious what happened now,,,
https://imgur.com/I9bx3ux before https://imgur.com/niai1YF after i bought i based what i saw on the first picture when i got there, the seller had said that they had already started to try moving it, i also saw that the back was off. this can only mean that THEY NECKED IT yesterday... it was not broken up until then. careless error on the seller. i confirmed this by placing the electron gun elements in water, the getter foamed up like crazy even this many hours later, meaning the metals it it had not oxidized yet meaning a fresh rupture. should i scream an yell at the seller? demand money back? where will that get me? bottom line I need a CRT now... but they SHOULD have said something. because there is no way they could have known that they did not break it.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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#29
03-21-2021, 09:55 AM
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Quote:
All you have to do is remove the PM focus unit.
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#30
03-21-2021, 10:51 AM
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you can see that it already wants to live!
https://i.imgur.com/ryF4EKY.jpg running at 90v input so as not to burn the test CRT. vert osc transformer on the way.
__________________
=^-^= Yasashii yoru ni hitori utau uta. Asu wa kimi to utaou. Yume no tsubasa ni notte. いとおしい人のために
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