Quote:
Originally Posted by
apoptosis 
We own a Hammond G-100 (the production date on it goes back to 1960-1961) which came with a dedicated amplifier unit (the unit is about the size of a very large bookshelf). I opened up the amplifier unit and saw 4 separate amps inside. Attached to 2 of the amps were pairs of Mullard EL-34s, and randomly sitting inside were another pair sitting still in their box, which appear to be unused.
I was wondering if I could use these tubes to drive a portable headphone amp or are their outputs too high to be useful for headphone amplification?
You couldn't use them for a portable amp, because they need a pretty serious mains power supply and output transformers. For a home amp, though, they'd be great. Output power (within reason) can be whatever you need it to be. Old Dynaco and Leak integrated amps used them for around 20 or 25 wpc, and padded down - IMO - that's an ideal recipe for a terrific headphone amp. They're good tubes ... and very versatile: they also showed up to great effect in Marshall guitar amps. Eric Clapton was wailing away with them, probably while his granddad was listening to Bach on them.
Or you could sell them - they're worth a few hundred bucks, probably. The very definition of a lucky New-Old-Stock find.
