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300B Warmup versus other tube or SS amps?

Anyone have experience in warming up their 300B SET amp?  My push pull tube amp comes on duty after about 15-20 minutes or so of warmup.  My 300B sounds distinctly better after 60-90 minutes of warmup.  If it's on for several hours it may even marginally improve from there.  It sounds a bit flat out of the gate (no warmup).  My other amps are not as sensitive to this.

I am just curious to what folks have observed in there setups.  
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Showing 2 responses by lowrider57

lowrider57's avatar
lowrider57
5,393 posts
 
Does a longer warmup time have to do with the amp being Class A?

For optimal sonics my Class A push/pull takes much longer to warm up than my AB amp.
 
lowrider57's avatar
lowrider57
5,393 posts
 
Perhaps there is no easy answer for tube amps. It might depend on design, size of transformers, caps, type of wire, tube type.

One of my SS amps took hours to sound its best, so I left it powered up.
With tubes it's easy to hear the SQ increase as it warms up.


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