2. amps-preamps
  3. 191958-170518

Tube power amplifier low static on one channel

Hi all I have an Audio Note Kit EL34 power amplifier. When the music is off I can hear a static sound from the right channel. It is not constant it gets louder then quieter then nothing then back again. I switched the non power tubes right to left and the static stayed on the original channel.  

If it was a tube it would have switched to the other channel correct?

If it was electro interference it would come out of both channels correct? 

Thoughts on what to check next?

Thanks

jh

johnah5

Showing 3 responses by johnah5

johnah5 OP
236 posts
 

Ah will have it checked.  If the filter cap is good next item?

jh

johnah5 OP
236 posts
 

Ok great idea. I did some research and the sound a bad filter cap makes is a hum. I don't have a hum it is a changing low level static. 

Will do the power tubes and update the post.

jh

johnah5 OP
236 posts
 

Found it!

It was one power tube which I isolated by switching channels and following the static. The power tubes are new stock so I didn't think it could be them but it was.  Thanks for the help.

jh

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