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#17
08-02-2004, 12:19 PM
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Quote:
__________________
Charlie Trahan He who dies with the most toys still dies. 
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#20
08-02-2004, 12:42 PM
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I should have put a note on my page that you need a browser plug-in to read DjVu files - there's a link on my home page. I attempted to edit the page and destroyed all lthe links...
 I'll fix it when I get home - I fixed the link for the 42-390, so it should be OK if you run the DjVu plug-in first. If you have the latest version of Irfanview (3.91), it also handles DjVu files.If you can't get it to work, I can send it as a zip file or pdf.
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#21
08-02-2004, 12:45 PM
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Hmm... looks like...
red xxxx, orange, yellow--> on osc coil for SW brown jumper on FM xxxx xxx coil That's the best i could do. Sometimes, servicemen would make notes on a chassis as to the Sams or Riders page number for the schematics. That's what i had hoped for.
__________________
Charlie Trahan He who dies with the most toys still dies.
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#25
08-02-2004, 03:59 PM
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I know its not gonna take much to get this beast working.
That schematic and stuff is right down to the tee. Thanks! anyway, according to the schematic, If i pull the rectifier tube, the B+ is cut off, so I dont have to worry about shorting. I pulled out the rectifier, and plugged it in. to my surprise, BOTH pilet lights work, and all the tube filiments are lighting. so right there, its not going to take much. Anyway, the rectifier tube is no where near original, its been replaced. I can tell. all the tubes are philco brand, and this on is tung-sol black base. I think it had died before. Imma check the transformer windings for AC volts going to the rect plates under power while the tube is out, just to see if the transformer is good. Ill report back on that.
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#26
08-02-2004, 04:08 PM
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It looks like each preset has it's own osc coil and when you press that button, you adjust the coil to the frequency you want it to stay at. If you have 5 presets, I would guess that 2 of them are for your AM band, 2 or four SW, and the last one for FM (just guessing). Looks like the button on the far left is OFF. When you press any of the other buttons, the set come on.
__________________
Charlie Trahan He who dies with the most toys still dies.
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#27
08-02-2004, 04:15 PM
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I took a measurement between pins 3 and 5 of the rectifier socket, (goes to both plates)
im reading about 577vac from the windings. That indicates the power transformer is good, but is the voltage normal? seems very high.
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#29
08-02-2004, 08:32 PM
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On the under-chassis picture., that black rectangular object next to the power transformer is a dual .01 mfd line-bypass capacitor; it should be replaced . Use 1kv or higher capacitors.
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#30
08-02-2004, 08:43 PM
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Your voltage is probably OK as you have the rectifier out and no load on the transformer. Should drop some when the rectifier is finally working and feeding B+.
For dial cord you can use woven fishing line, readily available everywhere. If you have any missing cord tension springs, you can get a plastic box of assorted small springs from a home center like Lowe's. Somebody has been in there before you so you want to check it out carefully. When I recap a larger set like this, I like to print out a copy of the schematic, and then trace every wire in the set one by one and mark it off with a highlighter as I go, replacing caps. When the schematic is completely highlighted, you're done. It's too easy to get lost and keep going back over the same ground without a "road map." Tom is right on that 6X5. Belt and suspenders: I'd put both a line fuse and one in the cathode circuit of the 6X5 so if it shorts it won't take your transformer with it. Good luck with it, Reece
__________________
Reece Perfection is hard to reach with a screwdriver.
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Linear Mode
