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Old 23rd July 2003, 01:32 PM   #1
diyAudio Member
Join Date: Feb 2002
Location: Roskilde, Denmark
Default Are these tubes worth annything?

Hi there.

Check the picture. I am thinking of trading these tubes to a local here in denmark. It is a bit hard to determin the value of them, so please help if you can.
The first tube with clear glass is marked "Philips D11, 35V, 30-75V"

The second tube with mirror glass is marked MAZRADIA on the cheramic socket and 6\100 AMP on the glass. They are both direct heated triodes, as they have four leags. What is the value of these tubes?

Thanks Peter Jensen, Denmark.
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Old 24th July 2003, 12:05 AM   #2
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Join Date: Aug 2002
Location: Belgium

No idea about the actual value of those valve but expect them to fetch high prices in collectors circles.

The Mazradia is a french-made valve.


Can't seem to find anyting on the Philips valve though...

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Old 10th November 2006, 11:16 AM   #3
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Join Date: Nov 2006
Default Philips D11


I see this is an old posting....but I know the answer on your question. The Philips valve is not a D11 but a D2 from 1925.
I collect old tubes so...if you want to sell it please let me know!

See also the attached PDF
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