More on Audio Impedance Matching

Sep 04, 2011 26 Replies

Which manufacturer specified 100 W at 700 V for 2x EL34 ?

For instance Telefunken specified in 1964 "Special quality" section

100 W at 800 V and max Ik =150 mA.

The only time I have seen 100 W with 2xEL34 is in one Marshall base guitar amplifier. In this amplifier the Philips/Mullard tubes literally melted after a few hours, the Telefunken tubes were the only that survived.

Typically a normal 100 W guitar amplifier had four or six EL34 tubes at slightly above +400 V anode voltage.

"Phil Allison"

** Philips and others.
** Dynacord tube amps used 2 x EL34s and delivered just a tad under 100 watts.

The tubes lasted for years.

A pair of 6L6GC tubes can replace the EL34s in a Dynacord and do the exact same thing.

** Class AB with screen and plate fed from the same supply.

.... Phil

"Warren"

** No - your are being tedious.

Co you are an ignorant ass.

... Phil

Phil Allison expounded in news: snipped-for-privacy@mid.individual.net:

You're right. I realized this morning I am making this way more complicated than it is.

Initially forget about the transformer and speaker and just design for a load resistor.

Then replace that with a transformer and speaker with the appropriate turns ratio. It's almost trivial when you see the forest.

Warren

"Warren"

** Hee haw.

** In your head.

** Yawnnnnnnnnnnnnn.....

** Confucius say:

" Man who cannot recognise forest, likely barking up wrong tree...... "

Woof, woof......

.... Phil

Phil Allison expounded in news: snipped-for-privacy@mid.individual.net:

Confucius say:

Fly which rests on toilet seat gets pissed off.

Warren

Not in a house where people have been trained not to piss on the seat.

Hope This Helps! Rich

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