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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.  
128x128jbhiller
lowrider57's avatar
lowrider57
5,417 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.


jbhiller's avatar
jbhiller OP
1,399 posts
 
Agreed!  Very interesting. My Primaluna takes far less than the SET. 
rodge827's avatar
rodge827
619 posts
 
I let my ANK interstage monos warm up for about 30-45 mins usually while preparing and enjoying dinner. There is some slight improvement after that but not much.
verdantaudio's avatar
verdantaudio
1,499 posts
 
That is surprising.  The heater in most SETs should get the tubes to optimal temperature within about 10 minutes.  I wonder if the heater isn't working right.  
bsimpson
167 posts
 
5-10 minutes max for all 300B SET amps I used (and that’s a really long list), idle is fine.

Solid state tend to take more time to be optimal in my prior ownership: 30 minutes minimum (low volume listening needed, idle isn't good enough). The classic Krell and Aragon Class A amps took longer (an hour of low volume listening).
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