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Post by drc on Mar 4, 2010 21:41:38 GMT -5
17, 18, 19 and 20 are off on my Robyn T123. I assume there is one crystal that works these 4 channels?
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Sandbagger
Administrator/The Boss 
Posts: 6,247 
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Post by Sandbagger on Mar 5, 2010 11:14:14 GMT -5
17, 18, 19 and 20 are off on my Robyn T123. I assume there is one crystal that works these 4 channels? Correct, the 23.490 Mhz crystal. |
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Post by drc on Mar 5, 2010 18:36:34 GMT -5
Hey, thanks Sandbagger. Help me understand this..... I have the following crystals in the radio: 37.600MC 37.650MC 37.700MC 37.750MC 37.800MC 37.850MC 4.635MC 4.625MC 4.615MC 4.595MC 5.545MC But no 23.490 crystal. I know it has something to do with harmonics.....  I need to replace two??? |
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Sandbagger
Administrator/The Boss
Posts: 6,247
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Post by Sandbagger on Mar 5, 2010 19:23:01 GMT -5
Hey, thanks Sandbagger. Help me understand this..... I have the following crystals in the radio: 37.600MC 37.650MC 37.700MC 37.750MC 37.800MC 37.850MC 4.635MC 4.625MC 4.615MC 4.595MC 5.545MC But no 23.490 crystal. I know it has something to do with harmonics..... I need to replace two??? Oh, my mistake, I assumed it was a T-123B. You must have the straight up T-123. Ok, based on the crystals you've listed , the 37.800 should be the bad one. |
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Post by drc on Mar 5, 2010 20:41:31 GMT -5
THANK YOU!!! And that was my fault, I should have been more precise on the model. I love this radio and can't wait to get these channels working.
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Post by drc on Mar 6, 2010 2:20:39 GMT -5
Bingo! 23.490 was it! 17-20 working! Thanks again Sandbagger.
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Post by zman on May 20, 2010 21:31:48 GMT -5
I had a Robyn T123B that had the same problem. Bingo, it was a crystal. Cool old radio!!
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Post by missourimustang on Jul 15, 2010 17:51:27 GMT -5
Its good there was a easy fix, but.... I also have a Robyn T123B with same problem.Only it is channels 13 thru 16 that arent right.Which crystal should I look for as the guilty party ?Lucky for me I have an old Hy Gain 23+ that is identical inside , tubes , etc.On the Robyn subject, how many of you ever seen or heard of a Robyn 24 Range Gainer ? I thought Id seen all Robyn bases until I saw one on Ebay.It looks like a old chrome cased Courier 23.I probaby need my head examined for bidding on it. 0 bids , why not ? A week from now , I'll be wondering why,lol.Id better get my green one going first.
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I need to replace two??? 
