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#1
03-28-2007, 02:45 AM
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24" Magnavox b/w combo gets a new crt
This used to be my great grandmother's tv. I fixed it a few years ago, and used it regularly until the crt got really weak, I later rejuvinated it, added a brightener a while after that, it was ok, but I didn't use it much anymore. Last year I found a similar set with a rebuilt crt in it, and I finally got around to putting it in this set. That label isn't very readable in this picture, but it says the tube was rebuilt locally in Van Nuys. Now that I have the back off I'm also going to recap the amplifier chassis, and see if I can fix the automatic record changer before it all goes back together.
Last edited by Adam; 09-13-2009 at 10:37 AM. 
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#2
03-28-2007, 10:07 AM
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That is the same company that rebuilt the 21EP4 that Charles gave me for my philco.
When you pull the record changer out, make sure to clean and lube all the metal bearings with moly grease. Lube up the motor bearings with 10w-30. If your table has plastic gears for the changer assembly, there's stuff you can buy called "phonolube" for that purpose. If the idler wheel is shot, has flat spots, or any other damage, google Terry's rubber rollers and you'll find the guy who rebuilds them.
__________________
Jordan
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#3
03-29-2007, 10:05 PM
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I will never ever ever buy another set with a record changer, ever...
Well, now that I said that I'll probably be hauling one home tomarrow, I only have one other combo set, and I am very happy the record changer already works. It coulds use a needle though. When I first got this set, I pulled out that rubber disc that activates the record changing mechanism, and just used it manually. But I decided now was the time to fix it. This thing was taken apart before, and not quite put back like it should have been, and some of the metal rods down there were slightly bent out of position. Luckily, I had the turntable out of the set I pulled the CRT out of as a guide, the rod that goes up the center of the record was bent on that one, so a direct swap was not possible, but between the two, I almost have one working now. I just have to get the record to drop, then I have it, the proper bits are moving just not quite enough, I'm sure after a bit of tweaking I will have it by later tonight. This is my first experience trying to fix a record changer, up till now I always just took that disc out and used them manually, maybe it's usually easier than this, but if this is a record changer I don't even want to think about fixing a jukebox. Anyone know where can I get replacement needles, that Philco I have needs one and this one could benefit from a new needle as well. And unit actualy sounds not too bad now that I changed the output tubes, I thought it just wasn't that good of a unit, but it turned out that those 6BQ5's were almost gone, changed them and it made a huge difference.
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#5
03-30-2007, 02:25 AM
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It's working, finally. It always pulls the arm back and shuts off when it reaches the end of the record, and consistantly drops the record if I only put 1 record on top, it sometimes gets confused with a big stack of records up there, and either doesn't drop any or drops more than 1, but that's ok. I'm putting it back together. I'm moving on to the next set...
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| Audiokarma |
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#6
03-30-2007, 04:37 PM
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skipping...
Only on the outer edge of records. And I tried different records, some do some don't. But only towards the outside, never towards the center. Tried cleaning the ones that do skip, no difference. Now I tried different copies of the same record, and found out it strangely always skipps only in specific parts of specific songs on every single copy of the same record. I tried an adjustment on the back of the arm with a spring that adjusts how much pressure is on the needle and turned it all the way up, it helped but it didn't entirely fix it. Could this just be caused my old worn out needle? The only adjustment on this is for pressure down (actually it's the opposite, the spring pulls up on the arm) and there isn't one which puts resistance on the movement of the arm, it just moves freely.
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#7
03-30-2007, 11:42 PM
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Here is a link to a turntable expert. Joel fixes stuff for people all around the world. I plan on having him repair a few turntables on some of my combos. I have 27" and 21" Maggie combos.
http://www.theturntablefactory.com/ polaraman
__________________
On the Bench: Master's Degree Thesis!
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#8
04-01-2007, 05:29 PM
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""I have 27" and 21" Maggie combos.""
A question for other owners of these Maggie combos. Do any of you also have a position on the TV-AM-FM-Phono switch for TV-Radio where the sound of the TV comes out of one speaker and the Radio on the other (either AM or FM depending on the position of a switch on the back of the cabinet). Then there's another dial called "TV balance" from which the TV volume can be adjusted seperately from the main loundess control so you can adjust which is louder. What could this possibly be for, who listens to the TV and the radio at the same time?
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#9
04-01-2007, 07:41 PM
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What radio chassis do you have? It should have ink stamped chassis marks like mine: R204-01-00. It could have -10/-20/-30 in place of the 00 at the end of mine. Mine is SAMS 697-10. I cannot play the radio and TV at the same time. I got my 21" combo at Goodwill for $1.00. The CRT in it was really weak. I found a good CRT buried in the TV shop at my last duty station.
I got this console stereo/record player this summer in the free pile last summer. The lytics are dried out and it sounds a little off. The record changer did not work but it had the needed cartridge and stylus. It is the same chassis but it does not have the Tv circuits wired in. Looks to be pretty easy to add those. I will take the best components to get my two Maggie combos working. A friend parted out another Magnavox stereo and have me all the parts minus the chassis. The record changer he gave me works. I have it in the stereo playing some Herb Albert right now. Tonight I am going to put the working changer in my combo. polaraman
__________________
On the Bench: Master's Degree Thesis!
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#10
04-01-2007, 10:38 PM
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Mine's a little older, in sams 454-1, radio chassis 59-01-00.
""I have it in the stereo playing some Herb Albert right now."' I was listening to Herb Alpert the other day, but my record changer kept skipping during "The Lonely Bull". It's strange, because I played some Elvis records this morning and it didn't skip even once.
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| Audiokarma |
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#11
04-01-2007, 11:13 PM
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Adam,
Mine does not skip at all. I use the RCA record cleaning kit before playing the records. It has the brush with the 80/20 alcohol water mix to clean the rercords. Sometimes you have to use running water and a soft toothbrush. Be careful to not get the label wet. It is funny that we are BOTH playing Herb Albert. polaraman
__________________
On the Bench: Master's Degree Thesis!
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#12
04-03-2007, 08:31 AM
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As to listening to TV and radio at the same time: back before multiplex stereo TV, some musical shows were simulcast with one stereo channel on radio and the other on TV. Not many TV's would have been set up for this: mere mortals would have just used a separate radio set up for the other channel.
Same deal on radio with pre-multiplex FM stereo: in the late 50's, some stations that had both AM and FM outlets experimented with stereo broadcasts, one channel on the FM transmitter and the other on the AM. I remember setting up two radios to pick it up. Reece
__________________
Reece Perfection is hard to reach with a screwdriver.
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#14
07-08-2007, 04:24 PM
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I went to watch this set yesterday only to get a picture that looked like the wire going to the antenna was loose, I messed with that for a while only to get less and less contrast, then a blank raster and sound and eventually a blank raster and no sound.
I pulled the chassis today and it turned out the problem was caused by a burnt out resistor supplying power to the 1st IF stage, it's woking again now. Picture of the new resistor below. But strangely, the radio stopped working at the same time, now I have to look at that, I get TV sound and sound out of the phonograph, so the amp and preamp stuff must be good, and I get no sound out of both AM and FM, so that narrows it down a bit. Last edited by Adam; 09-13-2009 at 10:36 AM.
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#15
07-08-2007, 05:11 PM
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Quote:
David
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Linear Mode
