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Audio problem with Valiant II




 
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Author Topic: Audio problem with Valiant II  (Read 115 times)
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KA3MFN
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« on: April 05, 2021, 09:01:53 PM »

Gentlemen,
 Am a newbie as to tube rigs. I have a Valiant II that basically has been rebuilt.  When running full output tuned as it should l have low audio, when I crank it up, it flat tops. Now the few QSO's I have had said it sounded fine, but the scope shows flat topping, and the REA shows more neg peaks then pos, even if I flip the phase. If I back down on the drive, and get it down to where she starts producing power around 20 - 40 watts, audio is beautiful on the scope, nice positive peaks over 100%, and the negs in line. This is a stock radio, no audio mods, except the clipper circuit is disabled. Any words of wisdom would greatly be appreciated.


73,

Bill
KA3MFN
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WBear2GCR
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Brrrr- it's cold in the shack! Fire up the BIG RIG


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« Reply #1 on: April 05, 2021, 11:13:34 PM »

Scope pix?

Are the tubes known to be good, tested??

How did you bypass the clipper?

How do you "flip the phase"?

Do you mean RANGER II?
A Valiant II is capable of up to 120watts of carrier...


                     _-_-
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_-_- bear WB2GCR                   http://www.bearlabs.com
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