[solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

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Would you be interested in a thread on the extensive restoration, or?

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Guest on Fri Jan 04, 2013 1:05 pm

Maybe a light thermal test on the transformer might show up a change in the fault or indicate it's not the source.

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Fri Jan 04, 2013 7:42 pm

I found, and, fixed my audio output voltage problem. An important wire going from one of the filters on C3 going to the junction of the 820 ohm resistor and, the audio tube broke. Also, another feed wire had broken. Both caused excessive voltage, and, audio hum.
Both are fixed, and, hum is gone, and, voltage on audio out. is back to where it shouldbe. That 820 ohm is used as a load for the audio section. It was feeding full B+ to the tube through one end, without the load down, and, the filter to the tube wasn't even connected, causing the hum.

Now, on vert. Problem, I guess the ticking was my poor connections, and, a broken solder joint on sync plate, as well. That wasn't my fault. It wasn't enough solder.That is a B+ resistor feeding 35V DC to one of the plates of the sync tube, 6SN7, in fact. They use that tube for half the sync, and, the other half of tube is audio pre amp.
This set sisn't exactly the best design.

On powering up the set vert. still had it's problem for the first two min., then, stabilized. Wha the???
I'll try it from a cold start again.
Bill Cahill
Picture is getting better. Sync is now stable.

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Ken g on Fri Jan 04, 2013 9:25 pm

See ... you didnt fry anything . Transformers can make noises caused by strange circuit voltages . If you unhook the voice coil from a speaker and turn the radio up loud , you can hear the radio play from the transformer .

Sounds like you are getting it figured out .

I drug home another barn fresh broken Philco predicta yesterday . Oh joy !

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by N7ZAL on Fri Jan 04, 2013 10:32 pm

No one can ever doubt your tenacity, Bill. Enjoy following the adventure. Smile
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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Fri Jan 04, 2013 11:27 pm

Guys, the best is about to come. Stick around!
I just took pictures of set playing on bench. I have to install them in computer, photo bucket, then here. It will be about 45 min. Stick around.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Fri Jan 04, 2013 11:42 pm

And, now, as prommissed, here they are..... What do you think???







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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Fri Jan 04, 2013 11:46 pm

I worked very hard on this set. Sorry, my hands shook a might, so, everything looks fuzzier than it is.
Plus, I think I was too close to set.
I have to adjust the contrast some on most channels. It's not perfect.
I don't know what happenned to vertical. It decided to quit acting up. Now it's completely stable. Go figure.
I'll play it on bench for awhile before I put it back together.
What do you guys think? Ready to call finnished??

Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Guest on Fri Jan 04, 2013 11:49 pm

Congratulations Bill, that's great! Smile

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Fri Jan 04, 2013 11:53 pm

Is it ready to go back together??
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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Guest on Sat Jan 05, 2013 10:34 am

I can't wait to see the cabinet, that set brings back memories for me. It's the same set my grandmother had.

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Guest on Sat Jan 05, 2013 11:02 am

It looks ready to go back in it's cabinet!

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by John Folsom on Sat Jan 05, 2013 3:15 pm

Bill, I think that picture looks very good, I would color it "done". You may have a bit too much height, as I don't think that set is a porthole. Nice work, I think I would consider putting it back in the cabinet ad let it play for a bit.

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Sat Jan 05, 2013 3:50 pm

Thanis, John. Actually, I adjusted the sound, and, have that playing better. Tried a different picture tube, and, got a little brighter picture. I think I'm gonna start putting this baby together.
I'm happy it came back to life.
Oh, and, I did adjust height, and, lin. No, it's not a porthole.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Guest on Sat Jan 05, 2013 4:10 pm

When I was young my Dad replaced the CRT in our Admiral with one that was called "aluminized." The picture after that always had a different tint to it.

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by N7ZAL on Sat Jan 05, 2013 5:20 pm

Looks nice, Bill. If it were mine, I'd call it done.
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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Sat Jan 05, 2013 7:55 pm

Well, today I did more work on it. First, at night, picture looked good. During the day, it was dim. So, I replaced the tube, and, it made a noticable difference with brightness, and, contrast.
Allso, remember the swirls you thought were finger prints??
Well, guess what! That was an earlier RCA Victor factory tube that came out of one of my earlier sets. It has a factory defect. I found out that the face on it has a swirl in it quite deeply that is in about the middle, all the way around. Apparently, they didn't polish the face, and, it looks like heck.

I did more adjustments for the sound.I wasn't happy with it at all.
NOw, it sounds fine... I have to do some things with cabinet, and, rewire speaker permanently, and, mount it. Then, I'll put set back together. Not today, unfortunately. But, soon.
Thanks, guys.
Set's playing well, now.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Ken g on Sat Jan 05, 2013 9:32 pm

That was fast ! you went from a smoking mess to working in about a day .

I played with this predicta last night . Plugged it in & fired it up . The screen came on and after wiggling some of the tubes it has a full picture . Needs more work .
I might put up a thread about it ??

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Sat Jan 05, 2013 9:38 pm

I don't know why not.... I'd be interested, especially with pictures.
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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Sat Jan 05, 2013 9:52 pm

A note. John Folsom mentionned on the phone that since I'm noticing my picture dims with slight decrease in line volatge, I might want to check voltages on picture tube, and, HV. I think I'll make sure of that.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Ken g on Sun Jan 06, 2013 1:58 pm

If a picture tube is a bit weak , changing its filament voltage slightly will do that . But you knew that .

And it looks like people like TV topics . You are at 1300 + views

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Sun Jan 06, 2013 8:10 pm

Well, I'm glad people like the topics. I find it very interesting to work on them.

ON my set, I still appear to have a glitch that I want to check on before I call it finnished. Besides that, I don't like using brightenners, so, put the best picture tubes in I can get.
Last night I mounted the dial eschucheon on the case, and, that's certainly good news. I hope the set gets finnished soon. It's alot closer to it.
Thankds, guys, for the interest.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Mon Jan 07, 2013 3:49 pm

Okay... All good news! Last problem fixed. I had been missing a resistor on horizontal output tube. It's on the screen. It was supposed to check 100 ohms. INstead, it tested 370 ohms, and, was burned.
I replaced it. Set looks much brighter!
Now, I have to find a speaker that fits, put set back together, andjust it in cabinet, and, play to make sure I'm finnished.
Picture looks good now.
I'm pleased.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Tue Jan 08, 2013 12:22 am

Well, did alot more work on it tonight. I have a speaker mounted in the cabinet, and, have wired up speaker system so it can easily be unplugged for chassis removal.
I may have a weak tube that is slightly weak. It seems to change on tunning as it warms up.
Otherwise, I had to replace power cord.
Hoping to get it back tobether tommorrow, but, tommorrow is shipping day.
At latest, it should be going back together Wednesday.
Bill Cahill

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Ken g on Tue Jan 08, 2013 8:37 pm

Do you try to rejuvenate picture tubes ? I have one of those beltron tube rejuvenators and used it alot in the 80's . I use it once & a while now on older arcade games . Its about the best one and gentle on tubes .

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Re: [solved]Admiral 20X122 is now finnishe project! See pictures!!!!!!!!!!!!!!!

Post by Bill Cahill on Tue Jan 08, 2013 9:20 pm

As a rule I don't believe in rejuvenating them unless I really have to. I don't have a Beltron, and, the present tube tester I have needs re building. My stand by one shorted iit's power transformer last year. I just can't afford one right now....
Bill Cahill

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