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ECC33/ECC35 Tube Addicts - Page 4

post #46 of 57
Thread Starter 

BTW the ECC33 shown just above, under amp test now, has the code 1324 L9, so it's probably December 1949

post #47 of 57
Quote:
Originally Posted by dminches View Post

Well, get to it!

 

Feck off! tongue.gif

 

It largely boils down to this: Cannot see the getter. How's the lighting in this photo? Is that black or grey? Bloody impossible to tell. Feck this!

post #48 of 57
Quote:
Originally Posted by rosgr63 View Post

BTW the ECC33 shown just above, under amp test now, has the code 1324 L9, so it's probably December 1949

 

Yep. Do you happen to have the codes on the yellow prints? I've read that yellow (≈ gold) was used in 1970 to celebrate the 50th anniversary year of Mullard (the company). But perhaps there were other times.

post #49 of 57
Thread Starter 

Oskari, these test 120-130% above the average value and sound wonderful.

 

They were made in 1967, matched pair with code: 5K2 R7J3

post #50 of 57
Quote:
Originally Posted by rosgr63 View Post

They were made in 1967, matched pair with code: 5K2 R7J3

 

Thanks! Are you sure about the R because that's significant; these would have been made at Mitcham!

post #51 of 57
Thread Starter 

Hi Oskari, yes I am.

 

BTW They do sound very very good.

post #52 of 57
Quote:
Originally Posted by rosgr63 View Post

Hi Oskari, yes I am.

 

OK. That's a fairly big change! Of about 300 kilometers. wink.gif

 

BTW They do sound very very good.

 

Off topic: So does the TS 6F8G FP & TS 7236 pairing. Sweet yet punchy. Nothing missing, nothing overblown.

post #53 of 57
Quote:
Originally Posted by Oskari View Post

 

Feck off! tongue.gif

 

It largely boils down to this: Cannot see the getter. How's the lighting in this photo? Is that black or grey? Bloody impossible to tell. Feck this!

 

Grey staggered plates.  D getter.

 

What else would you like to know?

post #54 of 57
Quote:
Originally Posted by dminches View Post

 

Grey staggered plates.  D getter.

 

What else would you like to know?

 

It was a general commentary on photos online. Your photos were positively clear.

post #55 of 57

Are ECC33's direct substitutes for 6SN7?  Thanks!

post #56 of 57
Thread Starter 

The ECC33 has the same heater requirements as a 6SN7.

But it has a much higher μ at 35 compared to 20 for a 6SN7 and a resistance of 9.7KΩ compared to 7.7 KΩ of a 6SN7.

post #57 of 57

Thanks! I better ask Jack Woo whether it will fit in my WA5 then...

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