BAT Thoughts.....

Besides frequent tube replacements, heat wreaks its havoc on other surrounding circuitry as well.

BTW... I'm in the "Sunburn State."... but we have a new thing here that helps us get thru our nine month summers....

Air conditioning.

I enjoy it, but don't enjoy paying for it.

I can place my hand over the top of my current tube preamp and hold it there a very very long while, I can do nearly the same thing with those Dodd MK IIs blocks, just to a tad lesser degree.

There are mini fans designed to run near silent or silent indeed and cool off such appliances. I've seen them and seen them talked about here in the forums.

Some appear to be small enough to attach to a rack, or reside nearby and should help immensely.

The coolest running amp I've ever owned was/is the Odyssey Stratos. By Far. Maybe the newer Stratos mono blocks or whatever Odyssey is calling their top tier blocks these days will run similarly.

I could use it as a pillow if it would just fluff up more.

It is true that the tube amps do run hot... about half of their standby power is actually in filament supplies!

Big tubes have big filaments. That is why they can deliver current pulses of several amps with ease.

Regarding the total power dissipation, it is about 500W per unit. Which is about 1700 BTU. From there a calculation can be made in terms of air conditioner load.

Tube life in units like VK-60 is not really an issue. There is some percentage of power tubes that fail early due to internal arcing, about 3-4% overall, but average tubes typically last several years.

There is also no thermal stress on internal components, they run very cool, due to design derating and strong chimney effect. Therefore after 15 years of production we are still not seeing any amps failing due to overheating. Usually the problems are related to random component failures, or foreign objects in the units - heavy accumulation of dust and pet hair among the most common.

Regards,

Victor Khomenko

I have numbers of tube amps in my house, BAT tube amps do run hot but not much hotter than other tube amps. amount of heat BAT 75SE produces is equivalent to ARC, VTL, or SF 100 wpc tube amp and drive capability is similar, so comparison between different wattage is fair.

But this is where the story ends, BAT sounds so much better than other tube amps!

To sweeten the sound of your VK55, roll the 6SN7.

I'm right there with ya Semi! Can't wait to hear the new REX power amp. To the OP Bob, may I suggest a warmer cable, try moving your speakers, or even some room treatment? Hope this helps

best,
Tom