My Rt 66 has always hummed for a few seconds at start. Do your heads do this also.? I always figured it was just the Bias or B+ caps charging. It is just for 2-3 seconds when the amp first fires, and then it is perfectly quiet. Thanks
So I figured. I have an old magnatone with a GZ34...it does the same thing. Like I say, with the indirect heat, and the design of the circuit, I just assumed it took a few seconds for the Bias and/or B+ to stabalize. Anybody else.? Thanks
Hmmmmm.......30 views. You guys do not know if your 66 Hums when you first turn it over.?
Last Edit: Nov 21, 2014 17:09:03 GMT -7 by backline
The noise you talk about comes from the head itself? Mine sounds like a musical shimmering hum. I noticed that all of my amps do the same thing more or less but much, much quieter. I had to hold my ear right on some of the amps to hear the hum. It just last a second or so.
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Post by rocknacional on Feb 9, 2015 22:17:23 GMT -7
My 66 head has a similar hum, which dissapears or diminishes after it warms up. But it never failed, so I figured it is a normal thing. Any reason to worry?
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