Anybody know this TUBE?

[zxx123]

I got this from my friend's gear.
However, I have never seen this before?
Can you let me know?

I think it is manfred. by chinese company.

 

[SY]

It's hard to tell from just that angle, but it sure looks like a 12AT7/ECC81.

 

[fdegrove]

Hi,


ECC81, probably.
Looks like it was made by RFT East-Germany, rebranded by some obscure vendor....

Cheers, 😉

 

[martinab2]

Not very clear from the photo, but my money would be on one of the VHF triode / pentodes like an ECF80 or something?

 

[martinab2]

It occurs to me that 'guess the tube' would make a great game to while away those long winter evenings...😀

 

[rcavictim]

I've never heard of a Chinese company named manfred. There is/was an English valve outfit called Mullard. Now there's a device called a hexfred but it is solid state, not a tube. Come to think of it, there once was a device called a manfredman. It was employed as a modulator for a system called an Earth Band.

 

[Sch3mat1c]

Nayyyy, 'tis not a 12AT7. Although the right side unit seems to be.

The wider left section leads be to believe it is the 6GH8/6U8/6EA8/... class triode pentode. Medium mu (maybe 50, ala 12AT7 as I said) triode plus pentode (comparable to 6AU6 or so, depending).

Tim

 

[DigitalJunkie]

Or perhaps 6AN8.. 😕

 

[SY]

If you could rotate the tube 90 degrees and take another picture, we can resolve whether or not that's a different type of section or whether it's the same, but there's a shield between sections.

 

[Circlotron]

My money is on a 6BL8.

 

[richwalters]

Looking by the messy tangle in the envelope base ....Far East certainly made this one....looks like

pin 1 = anode triode
pin 6 = anode pent
pin 7 = g1/2
pin 8 = screen + poss g3,K Pent
Pin 9 = grid triode

I agree with SY

The ECF80 is it's western twin. looking at an old 7199 it seems darned sim....however that was spudded together a bit better.

rich

 

[X.G.]

I got this from my friend's gear.
However, I have never seen this before?
Can you let me know?

I think it is manfred. by chinese company.

Hi.

The type of this tube is 6F2 in my eye,which is a triode+pentode tube made in Shanghai,similar to the 6BL8.

Maybe I can find its data paper,but not now

cheers

X.G.

http://www.bbs01.com/add.php?forum=2&titid=178943&replyid=179091

An externally hosted image should be here but it was not working when we last tested it.

 

[zxx123]

i found!

ya, it is 6f2, which can be replaced of 6u8.
thanks, guys!

 

[Circlotron]

My money is on a 6BL8.

 

[X.G.]

Re: Re: Anybody know this TUBE?

Maybe I can find its data paper,but not now

I just find one paper for the 6F2 datasheet

An externally hosted image should be here but it was not working when we last tested it.

 

[fcr audio]

6an8 7199 6au8 6gh8 or ecf86

the tube seems to be syrylic alphabet referenced by

6F2
or
equivalent in chinese fonts....

in fact if this tube comes from any dynaco-heathkit
el34 push-push 40w amplifier like audio institute or dynavox
VR70 ...whitch are st70dynaco 2*35W replica (2*40W for the
markIV)


you should pratically be sure that is't a 6an8 or 7199
equivalent....

obviously....
I'am trying to know by what this
"f----k" 6F2 ,whitch is in my
dynavox vr70e is!?


. ......i'am not sure yet of pin out
compatibility of this little triode/penthode common heating
if it could be safetely replaced by a 7199. 6AN8
6AU8 6GH8 6BL8 E80CF or ECF86


..the most audiophile of all noval triode-penthode
(AND problably more linear than THE
excellent power triode-Pentode(9W) ECL86....)
.....is the 7199....
.but some tweakers prefers replace
the ORIGINALS 6an8 or 7199
by a EC86+EL86 or EL86+1/2 ECC81
....for that see:

http://www.triodeel.com/dyna1.gif

http://www.triodeel.com/dynaco.html