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These amps would damn sure do it.

philips_el3471.jpg

Those tubes take SEVENTY WATTS each to just light the heaters (14.1 amps at 5V), and the plates are rated at TWO HUNDRED FIFTY WATTS dissipation.

So- those would put out like 320 watts per EACH output tube, or 640 watts heat, for a pair, at full output. Then there's two EL34s that are used as drivers (another 30 watts or so each heat), and the heat from all those mercury rectifiers. Probably close to 800 watts heat from each amp, at full tilt.

EDIT: Oops, I neglected to include the up to THIRTY FIVE WATTS screen dissipation per output tube, and up to TEN WATTS signal grid dissipation. That adds up to another 90 watts of potential heat, per amp...

Regards,
Gordon.
 
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These amps would damn sure do it.

View attachment 3007552

Those tubes take SEVENTY WATTS each to just light the heaters (14.1 amps at 5V), and the plates are rated at TWO HUNDRED FIFTY WATTS dissipation.

So- those would put out like 320 watts per EACH output tube, or 640 watts heat, for a pair, at full output. Then there's two EL34s that are used as drivers (another 30 watts or so each heat), and the heat from all those mercury rectifiers. Probably close to 800 watts heat from each amp, at full tilt.

Regards,
Gordon.
Who needs a furnace, just key up & defrost the windows... assuming those are transmitters there.
 
Those are AUDIO AMPS. 1000 watts output each. From 1955.

That had to have been like someone showing up with a nuclear reactor, in 1955.

Regards,
Gordon.
 
Those are AUDIO AMPS. 1000 watts output each. From 1955.

That had to have been like someone showing up with a nuclear reactor, in 1955.

Regards,
Gordon.
Those big glowing jugs are in all likelihood repurposed transmitting tubes, think heavy duty amateur radio transmitters. One must've had to have some beefy power distribution systems, or a stand-alone generating plant to run such a setup. Winter coming? Who cares! Throttle up them things, we don't need no steenkin' furnace!
 
Those look like Eimac 4-250A tubes. Huge for audio, but not so big for hams. It was common for hams to use tubes like the 4-1000A back then (1,000 watts dissipation). I had a linear amplifier with that tube at one time, later an amp with a pair of 3-500Z. Those really light up a room!
 
Those look like Eimac 4-250A tubes. Huge for audio, but not so big for hams. It was common for hams to use tubes like the 4-1000A back then (1,000 watts dissipation). I had a linear amplifier with that tube at one time, later an amp with a pair of 3-500Z. Those really light up a room!

They're the Philips QB3,5/750- which are indeed functionally identical to the 4-250A.

Regards,
Gordon.
 
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