ECC 85 Tube

leslie · Post by **leslie** » Mon 03/19/07 11:30 am

I have number of Telefunken ecc 85 tubes,so question is have anyone built preamp arround this tube?
I know it`s a different pinout ... but it seems that tube itself has similar characteristics to ecc 81/82 .
One more...which type of phase inverter would be apropriate for this tube?

http://209.85.135.104/search?q=cache:BB ... =clnk&cd=2

leslie · Post by **leslie** » Mon 03/19/07 10:47 pm

Hoyla!

leslie · Post by **leslie** » Tue 03/20/07 8:48 am

Nobody?

dartanion · Post by **dartanion** » Tue 03/20/07 11:02 am

I can't think of any guitar amps that used this tube, but hey! Give it a shot. Never hurts to experiment.

leslie · Post by **leslie** » Tue 03/20/07 11:42 am

Over here in Europe ecc85 was standard tube in the old tube radios,RF Tuners...
I red that some fifties Gibson amp used ecc85(6AQ8 ),but I can`t find data/schem and I can`t remember where I red that...
If someone has schem.anything...,please let me know.
Thanks

maglemer · Post by **maglemer** » Tue 03/20/07 3:00 pm

It seem to be somewhat explored among the hifi people:
http://www.jogis-roehrenbude.de/Leserbr ... ltplan.jpg

I remember someone have also tried it for some application at the headwize forum (I think it was over there somewhere

)

But i guess you could rather use with the component values used for 12AT7, just as you thought.

Franky · Post by **Franky** » Tue 03/20/07 7:13 pm

I found a Telefunken ECC85 in an old tube radio. Therefore I think they can't be bad for audio. Even EF86 are used as guitar preamp tubes.
So give it a try!

leslie · Post by **leslie** » Wed 03/21/07 1:00 pm

maglemer wrote:It seem to be somewhat explored among the hifi people:
http://www.jogis-roehrenbude.de/Leserbr ... ltplan.jpg

I remember someone have also tried it for some application at the headwize forum (I think it was over there somewhere )

But i guess you could rather use with the component values used for 12AT7, just as you thought.

Thanks maglemer,interesting schem!
Maybe I should build low distortion mono amp for my gramophone....
Just kidding...,obviously it will work in preamp/inverter....but Im not shure about Pin 9... puzzles me.. what the heck is pin 9?Is that attached to Heaters or not?

billv · Post by **billv** » Wed 03/21/07 1:57 pm

http://www.r-type.org/exhib/aaa0241.htm

Pin 9 is a inter-triode screen.

leslie · Post by **leslie** » Thu 03/22/07 10:12 am

billv wrote:http://www.r-type.org/exhib/aaa0241.htm

Pin 9 is a inter-triode screen.

Thanks billv for info and aditional data!

Merlinb · Post by **Merlinb** » Thu 04/26/07 7:02 am

The ECC85 is a superior valve and no mistake! For guitar I'd say it is similar to an ECC81 in terms of gain/sensitivity, but sounds WAY better when ovedriven!

Post by **zaphod_phil** » Thu 04/26/07 9:36 am

Hmmm, I like the idea of a 12AT7/ECC81 substitute that has better tone.

OK, just looked at the specs on http://www.18watt.com/modules.php?name= ... ly&t=16108
The gain (Mu) appears to be a bit lower at 55. Ra appears to be nice and low at 8.3k. So it should be pretty good for driving tone stacks.

Have you actually tried one of these in real life, then?

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