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  #181  
Old 04-04-2017, 04:25 PM
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Phil Nelson Phil Nelson is offline
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Quote:
Originally Posted by Electronic M View Post
find a sturdy box or some such
Like a picnic cooler:



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Phil's Old Radios
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  #182  
Old 04-04-2017, 07:19 PM
Tom9589 Tom9589 is offline
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And the best part is that you can keep your beer cold in the cooler while you work!
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  #183  
Old 04-05-2017, 02:25 AM
kvflyer kvflyer is offline
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And the best part is that you can keep your beer cold in the cooler while you work!
But it will be tough to get at...
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  #184  
Old 04-05-2017, 04:44 PM
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Restoring an admiral c322
 
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I do the same thing, but I use a sturdy stool instead of a cooler. Makes everything so much easier for sure!
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Admiral C322C2 Regent (Restoring)
RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #185  
Old 04-11-2017, 05:32 PM
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Restoring an admiral c322
 
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I replaced the CRT with a 21FB that is a bit stronger. It displays a beautiful picture with all colors strong except for red which is weak. This has do to a problem with the circuitry driving the red cathode. I have been tracing back through the circuit and have been finding resistors that have gone off. I think I will tackle this problem before I continue on the color sync issue.
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RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #186  
Old 05-09-2017, 07:42 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Im starting to really think the replacement crystal may be bad since it does have a big dent in the side of it (Must have occurred during shipping) and I cant seem to get the color to lock no matter what I do. With the last crystal I could get the color to lock I believe. I will swap the crystal once I can find one. Work has been slow this whole year and I admit I have been lazy with the restoration of this set and have not worked on it as much as I should have. Summer is coming up soon so I hope to have the set finished by August. Slowly but surely this set is shaping up!
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RCA CTC-7 Pensbury (Restored)
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  #187  
Old 05-10-2017, 12:38 AM
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Sounds like you're nearing the finish line!

If you have a signal generator and scope, you can do a bench test of the crystal. In my CTC-4 article, scroll to the section titled, "Bench Testing the 3.58-MHz Crystals":

http://antiqueradio.org/RCACTC-4ColorTelevision.htm

Thanks to dtvmcdonald for that tip.

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  #188  
Old 05-31-2017, 05:32 PM
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Restoring an admiral c322
 
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From what I am gathering, I think the crystal may be bad. I have it setup to be bench tested. I'm not seeing a real big change in amplitude when I get around 3.58. First picture is at 3.58 and second is way down around 1mhz. This is what I believe the change should look like https://antiqueradio.org/art/RCACTC-...lAnimation.gif
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File Type: jpg 20170531_181909.jpg (60.5 KB, 22 views)
File Type: jpg 20170531_181921.jpg (64.4 KB, 20 views)
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RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #189  
Old 06-02-2017, 10:14 AM
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Restoring an admiral c322
 
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Any thoughts? I believe the crystal is bad, but I'd like some advice before I go out and buy one.
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RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #190  
Old 06-02-2017, 11:51 AM
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They're cheap - get one or a few
http://www.newark.com/raltron/a-3-57...49u/dp/96F2798
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  #191  
Old 06-02-2017, 09:08 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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Cant go wrong at 58 cents. Ill pick one up soon and go from there. I now have a whole lot of time to work on the set now. I hope to get it wrapped up by august.
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RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #192  
Old 06-27-2017, 09:53 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
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New crystal is in and I can see a bit of improvement. Still cant get color to lock. But I can faintly see color through the rolling bars. Black and white picture is perfect I just cant get this pesky color to lock. I have tried putting caps across the crystal but I cant seem to get the frequency below 3.57900 (with a cap across the crystal). Reading through Phil's article on his 4 reveals that a 100pf cap can be put across L142 I believe. This TV wants to produce color, it is so close! Should I add a cap across L142?
Attached Images
File Type: jpg 20170627_212115.jpg (83.0 KB, 16 views)
File Type: jpg 20170627_214957.jpg (60.3 KB, 16 views)
File Type: jpg 20170627_220650.jpg (61.6 KB, 16 views)
File Type: jpg 20170627_220731.jpg (67.7 KB, 18 views)
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Admiral C322C2 Regent (Restoring)
RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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  #193  
Old 06-27-2017, 10:53 PM
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Quote:
Originally Posted by SwizzyMan View Post
... I have tried putting caps across the crystal but I cant seem to get the frequency below 3.57900 (with a cap across the crystal)...
Did you mistype the frequency? 3.57900 is too low - should be 3.579545.

Edit: oops - I see you meant 3.57966 - still high.
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Last edited by old_tv_nut; 06-27-2017 at 10:58 PM.
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  #194  
Old 06-27-2017, 11:03 PM
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More C across L142 is easy and worth a try, I think.
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  #195  
Old 06-27-2017, 11:03 PM
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SwizzyMan SwizzyMan is offline
Restoring an admiral c322
 
Join Date: Apr 2015
Location: Side Lake Mn
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Quote:
Originally Posted by old_tv_nut View Post
Did you mistype the frequency? 3.57900 is too low - should be 3.579545.

Edit: oops - I see you meant 3.57966 - still high.
Yes right, my bad. I can get it down from 3.57966 to 3.57900 with a cap across the crystal.
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RCA CTC-7 Pensbury (Restored)
RCA CTC-5 Westcott (Restored)
CRA CTC--4 Director 21 (Restoring)
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