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  #151  
Old 09-29-2020, 05:32 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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I went through and replaced a bunch of off value resistors in the chroma and IF section and am going to attempt another IF and chroma alignment. I am debating putting the crt back in the chassis since having it installed makes the chassis awkward to work on and puts some mechanical stress on the crt when tilted on its side. Do I really need the crt installed to do alignments and dip the HOT cathode current?
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  #152  
Old 10-10-2020, 11:09 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Well the coil troubles have gotten worse. While trying to perform an IF alignment on the set I ran into a coil (L9-41.25 and 47.25mhz trap) that had its slug frozen inside of the shaft. Long story short no amount of heating would make it budge so I ended up having to break up the slug inside of the shaft. I now need a replacement slug and luckily the top slug in the coil was able to be removed so I was able to get some measurements of the replacement I need. Coincidentally, the slug out of this coil appears to be identical in size to the chipped slug in the 3.58 trap. Does anyone have 2 of these slugs? Or is there somewhere I could possibly find some? Can't continue any work until I get this problem sorted out so any help is appreciated.
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File Type: jpg IMG_0601.jpg (105.5 KB, 22 views)
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  #153  
Old 10-11-2020, 01:26 PM
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ohohyodafarted ohohyodafarted is offline
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Heating alone is only half the solution. You need to be able to dissolve the hardened wax. I use a squirt of WD40, wait overnight, and if it still will not turn, then hit it with heat gun and more WD40. Also, never use anything besides a plastic alignment tool. Allen wrenches are a sure way to crack the ferite core.
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  #154  
Old 10-11-2020, 02:57 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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I was originally going to try using WD40, but I was concerned on how it would affect the cardboard tube so I held off. I'll keep that method in mind from now on. And I have confirmed that that the thread size of the slug is 1/4-28 so that should help.
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  #155  
Old 10-13-2020, 08:43 AM
TVBeeGee TVBeeGee is offline
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SwizzyMan, I'm amazed that you write so well. You even know the difference between "affect" and "effect", seemingly a rarity among most engineers these days! Bravo!!! Good luck in your projects.
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  #156  
Old 10-13-2020, 10:31 AM
Jon1967us Jon1967us is offline
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Checking out your photos early on in the thread, I noticed the crazy browned glass on the rectifier. Also, great job on the cabinet restoration. I need to try that Restore a finish on a similar cabinet.
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  #157  
Old 10-13-2020, 08:07 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Appreciate the kinds words guys. Still trying to solve my slug problem though. Does anyone have some input here? I really would like to get back to work on this set.
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  #158  
Old 10-13-2020, 09:08 PM
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Sorry don't have anything - do you have a donor chassis you could borrow a core from? Probably doesn't even have to be a TV - a radio might do.
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  #159  
Old 10-13-2020, 10:24 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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The only other chassis I'm positive would have some is my ctc4, but I'd rather not borrow from that one. I do have a 50s rca junker b&w set that may have some so i will check that tomorrow. I was able to pull a few slugs out of some of my other junk chassis, but they were all too short or either had the slot adjustment instead of hex.
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  #160  
Old 10-17-2020, 03:23 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Ok so I think I may have found a suitable replacement slug, but I still have some questions before I re-install the IF transformer. My main concern is the fact that the replacement I found has the slot adjustment. My main concern with using this type in place of the hex style is the possible tuning frequency range differences caused by the slot slug having more ferrite mass than the hex slug. Would it really cause any issues when aligning the set? Keep in mind the slot slug will be paired with a hex slug in the transformer I am dealing with since it is a two "slugged" coil. What do you guys think?
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  #161  
Old 10-17-2020, 04:45 PM
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The only problem I really see is reaching the bottom slug through the top one. The top will either be the slot slug and block a tuning tool, or be the hex and block a blade tool. There were some plastic hex tools with a short blade detail on the end of the hex. Do you have one?

Edit: I didn't mean that it's impossible the slot slug may produce too much inductance. The best way to find out is to try it. What's most likely is that its position will be a little less into the coil. In the extreme case, this could affect the Q of the coil, but I'd guess not to worry.
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Last edited by old_tv_nut; 10-17-2020 at 04:53 PM.
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  #162  
Old 10-17-2020, 07:17 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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I do not have one of those. I am beginning to think that this slug may not be a good replacement after further examination. It will thread fine into the coil, but once the threads reach the area where the coil winding is located, it starts to get pretty hard to turn with any plastic alignment tool. I'd rather have a hex keyed one anyways, but the slot was worth a try. I checked every extra chassis I have and parts piles and still can't find anything identical to the original. Searching online yields no good results on replacements either. Really at a loss right now. Someone has to have one right?
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  #163  
Old 10-18-2020, 03:39 PM
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Electronic M Electronic M is offline
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If you have a longer hex coil you could cut it down to match. I have a couple of convergence boards I keep for spare rheostats and slugs and have cut down slugs from them before. A dremel with a one of those thin cutoff wheels works well for cutting slugs down.
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  #164  
Old 10-18-2020, 04:26 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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That's my problem. All the hex slugs I found were too short.. If you have a few spare slugs on any of your convergence boards that atleast match the thread and diameter let me know if you'd be willing to sell some.
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