Identifying EL34 tube?

[Skorpio]

I have two old/used EL34 in my SimpleSE amplifier. They are in full working condition and I would like to buy a new set of the same...

The problem is that I can't identify them as most of the printing is gone. I can't attach a photo at the moment, but I can give some clues:

1. The base is medium brown
2. The printing is white
3. Central on the tube the line "EL34/6CA7" is printed
4. Above the type printing something has been printed, perhaps a logo or something. Perhaps a print with more than 1cm diameter..?
5. On the base a small label has been places, it is brown with two white windows: "Grade:" and "Measured by:"


Anybody with a clue?

 

[srh]

Hi, possibly Dutch Philips Miniwatt. If they are there should be etched in the glass bulb just above the base a batch# and factory id.
e.g. X14
L1G
A Google search for EL34 will bring up sites with photos of various manufacturers products.
Cheers,
Steve.

 

[Skorpio]

Hi, possibly Dutch Philips Miniwatt. If they are there should be etched in the glass bulb just above the base a batch# and factory id.
e.g. X14
L1G
A Google search for EL34 will bring up sites with photos of various manufacturers products.
Cheers,
Steve.

Ok, thank you...I will check that later today!

Regarding Google search...I have spend some hours searching....and found nothing looking like mine!

 

[mace1337]

Refer to this website for manufacturer and date codes: Mullard, Philips, and Valvo Tube Codes

 

[Skorpio]

These are looking very close:

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

But I don't think there is that narrowing of the glass tube just at the base?

 

[hidnplayr]

Another thing that might help identify them, is the fact if they have got a hole in the pin's guide or not.
But as mentioned before, better look for etch codes first.

 

[Doz]

What does the top of the bottle look like? Does it have a cross shape in the glass?

 

[Soonerorlater]

Double getters as above? Shape of getters as above?

 

[Skorpio]

The top of the tubes are Flat/round without any other things. And yes double getters...

 

[Soonerorlater]

Finding a code etched into the glass ( around the base perhaps? ) can be tricky sometimes, rotating the valve in different lighting conditions sometimes reveals it. XF2 perhaps?

 

[Skorpio]

I found no code or information etched into the glass...and no holes in the base. The base color is red/brown...

 

[boywonder]

Skorpio: A picture is worth a zillion words.........A couple of pics would be even better.

 

[Rod Coleman]

THe 'proper' St Petersburg EL34 is brown base, with characteristic legend:

EL34 Svetlana =C=

THe B version Shuguang also has brown base:

Vaccum Tune Shuguang EL34-B - EL34 Tube @ on9mart.com

The JJ and Electroharmonix versions always have black base, so far as I have seen.

If it's not one of the first two, it's probably out-of-production - and for EL34, this means very high cost, since guitar amps use them.

 

[Skorpio]

I have a few photos, but now I must find out how to put them here....

 

[mace1337]

I have a few photos, but now I must find out how to put them here....

imgur: the simple image sharer

Make sure they're not blurry pictures because those are useless. We have to be able to see every detail.

 

[tinitus]

I have a few photos, but now I must find out how to put them here....

please use forum upload

save your resized photos in your document files

when posting, click on 'manage attachments', below post


moderation

 

[Skorpio]

Quality might not be good enough?

 

[Skorpio]

 

[mace1337]

Yeah it's pretty much impossible to see small markings, if any, on those pictures.

 

[mctavish]

From the getters and the micas they look like run-of-the-mill chinese tubes to me FWIW...