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Author Topic: Ameritron AL-80b  (Read 3068 times)
KB0UOA
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Posts: 3




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« on: September 22, 2013, 06:52:01 PM »

I just got a used AL-80b. On the input board there is a capacitor that has been hot. On the schematic it looks like c-215 but in the parts list there is no c-215. I looked at the AL-572 schematic and it lists the same c215 capacitor as the 572 part list shows it as a .01 1k capacitor. Is this the correct part? Also any idea what might have caused it to burn? I think this is on the 10 meter tuning.
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G3RZP
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Posts: 4965




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« Reply #1 on: September 23, 2013, 02:21:36 AM »

A 0.01 microfarad won't be 10 metre tuning. Could be a blocking cap if it really is a 0.01. Is it a disc ceramic?
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W1QJ
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Posts: 1521




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« Reply #2 on: September 23, 2013, 05:47:48 AM »

C 215 is a simple bypass cap on the transformer side of the bifalor choke.  Chances are it did not get hot.  Maybe it looks like it did.  Anyhow I suppose anything is possible so if it indeed looks bad, it would be a .01 disc at 1KV.  Change it if it makes you feel better.  It would be the same cap that is on the other leg of the choke.
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