[rosgr63]

One of the best drivers for the ECBA is the ECC35 even thought the amp uses 6SN7 drivers.

 

[mordy]

Hi Glenn,
It sounds like an appealing idea. How many more knobs and meters would it entail? One set for each channel if using the C3g sockets? And a third for the front driver position? Or, in the case of EL3N, is this meant for a dual socket in the front position?
And on a practical level, how do you actually do it? Setting the voltage, inserting the tube, looking at the chart and moving the knob to a certain position on the scale?
And finally, how much would it add to the price? Is a retrofit possible?

 

[rosgr63]

One fits all would be best

 

[mordy]

Nope. It was an ITT company like STC in UK and Standard Elektrik Lorenz in Germany.

Thanks for the information.

 

[whirlwind]

One of the best drivers for the ECBA is the ECC35 even thought the amp uses 6SN7 drivers.

The ECC32, ECC33,ECC35 tubes all come to mind....would be very interesting to see if they are biased correctly what differences it would make or if like Ken suggested...maybe they sound better not biased to spec.....technically biased properly would be ideal.

 

[2359glenn]

One bad thing it would allow you to set the plate current way to high for the tube.
Then I thought a selector switch with resistors that clicks to the wright tube. But you guys use so many different tubes this would be impossible.
And then a tube might sound better with a less then optimal setting that would make the pot better.
Have to think about this more.

 

[Zachik]

ECC32 installed in a 6SN7 socket is not biased properly. And yet, some claim it sounds better than any properly biased 6SN7.

The ECC32 is not on my list... (I do have ECC35 and ECC35)
Should I add it? and does it need an adapter??

Also, what about 6L6GC (or the Russian equivalent 6N3C)? would they work? should I add to my compatibility table?

 

[mordy]

The ECC32 is not on my list... (I do have ECC35 and ECC35)
Should I add it? and does it need an adapter??

Also, what about 6L6GC (or the Russian equivalent 6N3C)? would they work? should I add to my compatibility table?

Hi Zachik,
Could not find the 6SL7 tube on your list. It is similar to the 6SN7 but with higher gain. ALL the tubes below are 6SL7 variants:
6SL7/VT-229, 5691, 7F7 (loctal base)
6H9C, 6N9S Russian
6N9P Chinese
ECC35 British
33S29 Swedish
And I am sure there are more variants.....

 

[leftside]

I'm currently having an amp built by a local builder, and I've opted for 3 different socket types for drivers: C3g (2), 6J5 (2) and a 6SN7 (1). There is also a selector knob on the front of the amp to select which drivers to use, and also the 6SN7 socket can take 12SN7, 6SL7 and 12SL7. All 6 options are selected via the selector knob. These are my chosen selections as I have a lot of these tubes, but I'm sure the selection choice could be endless... perhaps others would prefer a EL32, EL3N, selector, etc.

 

[Zachik]

Hi Zachik,
Could not find the 6SL7 tube on your list. It is similar to the 6SN7 but with higher gain. ALL the tubes below are 6SL7 variants:
6SL7/VT-229, 5691, 7F7 (loctal base)
6H9C, 6N9S Russian
6N9P Chinese
ECC35 British
33S29 Swedish
And I am sure there are more variants.....

Updated my list - thanks!!
Also, started a list (at the bottom) of known NOT compatible tube types, just to prevent repeated newbie (like me) questions
Lastly, at some point soon, I will start a change log. That would help people who check the table occasionally to figure out what has changed instead of comparing row-by-row...

 

[rosgr63]

Hi Zachik,
Could not find the 6SL7 tube on your list. It is similar to the 6SN7 but with higher gain. ALL the tubes below are 6SL7 variants:
6SL7/VT-229, 5691, 7F7 (loctal base)
6H9C, 6N9S Russian
6N9P Chinese
ECC35 British
33S29 Swedish
And I am sure there are more variants.....

Add the wonderful 6SU7

 

[rosgr63]

Remember the plate voltage for the 6SL7 should be lower than 200V which is not the case with 6SN7

 

[rosgr63]

I'm currently having an amp built by a local builder, and I've opted for 3 different socket types for drivers: C3g (2), 6J5 (2) and a 6SN7 (1). There is also a selector knob on the front of the amp to select which drivers to use, and also the 6SN7 socket can take 12SN7, 6SL7 and 12SL7. All 6 options are selected via the selector knob. These are my chosen selections as I have a lot of these tubes, but I'm sure the selection choice could be endless... perhaps others would prefer a EL32, EL3N, selector, etc.

That will be an awesome amp

 

[rosgr63]

Hi Zachik,
Could not find the 6SL7 tube on your list. It is similar to the 6SN7 but with higher gain. ALL the tubes below are 6SL7 variants:
6SL7/VT-229, 5691, 7F7 (loctal base)
6H9C, 6N9S Russian
6N9P Chinese
ECC35 British
33S29 Swedish
And I am sure there are more variants.....

Mordy if I remember well the 7F7 and 7AF7 are similar in characters to the 6SN7 not the 6SL7

Need to check the data sheet to be sure

 

[L0rdGwyn]

Hi Keenan,

Yes it is a cocobolo Atticus, and thanks for your kind words. Zach's work is truly impeccable, such a wonderful craftsman.

It is not the hardest or the most dense wood...but it is right up there and it sounds wonderful. The slam of the bass is quite addicting.

Here it is with a fresh coat of polish...I need to polish again soon.

Zach really is a true craftsman, they look incredible. I own a cocobolo Auteur myself, the wood does great things for the bottom end, it's probably about time I put some polish on myself. One must own two ZMF headphones, one for staring and one for listening at all times