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 Post subject: admiral console??
PostPosted: Apr Mon 16, 2018 9:33 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
got this today for 20$ got it and no pwer so i checked and the breaker was bad so i bypassed it now it has a slight rastr and no ound at all. any ways, what is the very least i can do to get this th going. (also i hope i did not pay too much. did i?


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 9:34 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
images in a second


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 9:48 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
the TV


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 10:38 pm 
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Joined: Apr Sat 06, 2013 2:18 pm
Posts: 325
Location: New Hampshire
Condition looks pretty good so $20 a fair price. The CRT looks so-so BUT the HV is a
little low so when fixed it may get brighter.
You have 3 problems for starters.
1) width is in, odds are horz output tube weak
2) vert small maybe the vert osc/out tube or something else.
3) no sound is usually the easiest to deal with.

Next step is post the model & chassis numbers. Also a few pictures of the guts known as
"nudies". Also what you have for equipment & your experience level.

Good luck
Zeno 8)
LFOD !


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 10:58 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
[list=][/list]


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 11:01 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
the tv


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 Post subject: Re: admiral console??
PostPosted: Apr Mon 16, 2018 11:03 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
I work on mostly radios like the all american five tube radios, i have nothing but basic tools and a fluke meter, i know how to replace capacitors and tubes and can most likely do other work as well if pointed in the direction


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 12:42 am 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
i dont have a tube tester but the damper tube lit up like a lightbulb the second you turned it on so i had one of the same i took out of a zenith set, it seems to light up slowly and dimly like a tube is supposed to now. the tv does the same thing


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 1:10 am 
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Joined: Apr Sat 06, 2013 2:18 pm
Posts: 325
Location: New Hampshire
Best news is there is no brightener on the CRT. Looks nice & clean inside.
The Fluke is the best meter IMHO & with that & a little knowledge you can fix most TV's.
Find a manual first. Its in Sams 532-1. That puts it about 1960 or 61. You
can still buy the Sams BUT try to find the original Sams. Its much higher quality than a
photo copy or PDF & CHEAPER ! Also a lot are on the web for free.
Then start with measuring all the B+ voltages & take it from there.
To make things more pleasant dust out with a VERY soft paint brush & vac.
good luck

73 Zeno 8)
LFOD !


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 1:13 am 
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Joined: May Sun 07, 2017 11:35 am
Posts: 202
That heater flare is not uncommon for 6AU4s. They can keep running for many years like that.

The low width will probably be a bad 6CD6 - that's the big bottle with the top cap. This might be hard to get, a 6DQ6 is a suitable replacement. Looks different but it will work OK.
It would also be wise to replace the 5U4 rectifier.

The raster crushing at the bottom will be a bad cathode bypass electro on the vertical output stage. I'd also replace the coupling cap on G1 if it's a paper.

That should bring the raster up to spec. You then need to find out why you've got no snow, assuming you have no signal connected.


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 1:14 am 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
also i know you should replace wax caps, should i replace all the ceramic tube caps and the paper caps underneath first?


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 1:18 am 
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Joined: May Sun 07, 2017 11:35 am
Posts: 202
Yes all wax paper caps should go. The ceramics are generally OK.

Your low width might be a bad B+Boost paper cap. This part is critical, you need a high voltage high current (physically large) cap in this position. Don't replace any caps with caps that have less than the marked voltage on the original..


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 2:18 am 
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Joined: Mar Sun 01, 2009 10:27 pm
Posts: 4438
Location: Ann Arbor, MI
Looking at your pictures, I am quite sure that those ceramic tubes have paper caps inside of them. For all the talk about bad tubes, bad caps could cause these problems too.

_________________
Tom


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 2:27 am 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
hi, i know i am an idiot, please dont be too mad, i left the tv on for a while to see if some caps would reform or something, the tv has made a clicking sound and lost horizontal so now it has a vertical line, i turned it off instantly so no burn in, could this be the output tube?


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 8:00 am 
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Joined: May Sun 07, 2017 11:35 am
Posts: 202
Yeah, you should never have turned it on in the first place unless thru a dim bulb tester (look it up).
You are very lucky to have got this far relatively unscathed...

Which way did the line run? Top to bottom, or left to right?


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 3:18 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
yeah i know, i have a variac i should have used that but i did not, i was going to replace the caps anyway, i think this would have probably happened even if i had got it working so i saved myself time finding it now not after i get it working, it is top to bottom


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 5:33 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
i was thinking this was going to be a job where all i had to do was replace capacitior and it would work most likely but now that i have no sound and apparently no horizontal now i dont know


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 5:50 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
okay, so i am actually quite stupid, i do more in the old fans because they are more mechanical and more simple, i want this tv to work, someone suggested puttting in a new tv but i want it to work with the original chassis. i want to do the least i can do to get it to work, i dont have any tube testers no equipment besides basic tools and a fluke multimeter. like i say i have buch of aa5 radios they are simple normally.


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 8:02 pm 
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Joined: Mar Sun 01, 2009 10:27 pm
Posts: 4438
Location: Ann Arbor, MI
A little note about the horizontal deflection works. The horizontal output tube drives a horizontal output transformer commonly referred to as the flyback. The flyback is then connected to the horizontal windings of the deflection yoke. The deflection yoke is a circular arrangement of electromagnets mounted on the neck of the picture tube ( CRT ) up tight to where the tube flares out to meet the screen. As part of it's operation the flyback generates high voltage pulses that are rectified by the high voltage rectifier to create the high voltage needed by the picture tube.

Now if your vertical line was there for more than about a half of a second then you still had high voltage being generated. That means that the horizontal output tube and most of the surrounding circuits were still working. Now looking at the schematic of what I think is a similar set, I see that the horizontal deflection is coupled to the yoke through a capacitor. With some luck nothing more has happened then that this capacitor has gone bad.

Here is a link to the schematic that I found. http://www.earlytelevision.org/pdf/admiral_20a1_sams_77.pdf. Sometimes people here will have a needed schematic and post it. If so, that would be good.

_________________
Tom


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 Post subject: Re: admiral console??
PostPosted: Apr Tue 17, 2018 8:25 pm 
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Joined: Jan Wed 17, 2018 8:17 pm
Posts: 44
yes thanks, i do realize what most of the stuff does, i have a bunch of tvs but mostly soldid state sruff that needs nothing more than a couple of caps. yes i can turn it on and the line will come up, also the line wiggles from side to side rapidly for a second or two and then stops


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