Identifying EL34 tube?

Skorpio · 26th August 2011, 09:29 AM

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 · 26th August 2011, 10:24 AM

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 · 26th August 2011, 10:49 AM

Quote:

Originally Posted by 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.

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 · 26th August 2011, 10:54 AM

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

Skorpio · 26th August 2011, 10:57 AM

These are looking very close:

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

hidnplayr · 26th August 2011, 11:07 AM

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 · 26th August 2011, 11:15 AM

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

Soonerorlater · 26th August 2011, 01:09 PM

Double getters as above? Shape of getters as above?

Skorpio · 26th August 2011, 04:27 PM

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

Soonerorlater · 26th August 2011, 04:51 PM

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?

26th August 2011, 09:29 AM	#1
Skorpio diyAudio Member Join Date: Mar 2004 Location: Denmark	Identifying EL34 tube? 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?

26th August 2011, 10:24 AM	#2
srh diyAudio Member Join Date: Mar 2004 Location: Whangarei. NZ	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. __________________ The older I get, the more simplicity appeals.

26th August 2011, 11:07 AM	#6
hidnplayr diyAudio Member Join Date: Sep 2008	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. __________________ Real tubes have top-caps

26th August 2011, 11:15 AM	#7
Doz diyAudio Member Join Date: Jul 2010 Location: Sat Down	What does the top of the bottle look like? Does it have a cross shape in the glass? __________________ "To err is human.. to make a real balls-up requires a computer"

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26th August 2011, 10:54 AM	#4
mace1337 diyAudio Member Join Date: Aug 2005	Refer to this website for manufacturer and date codes: Mullard, Philips, and Valvo Tube Codes

26th August 2011, 10:57 AM	#5
Skorpio diyAudio Member Join Date: Mar 2004 Location: Denmark	These are looking very close: But I don't think there is that narrowing of the glass tube just at the base?

26th August 2011, 01:09 PM	#8
Soonerorlater diyAudio Member Join Date: Jul 2008 Location: Belfast	Double getters as above? Shape of getters as above?

26th August 2011, 04:27 PM	#9
Skorpio diyAudio Member Join Date: Mar 2004 Location: Denmark	The top of the tubes are Flat/round without any other things. And yes double getters...

26th August 2011, 04:51 PM	#10
Soonerorlater diyAudio Member Join Date: Jul 2008 Location: Belfast	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?

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