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Old 8th February 2009, 03:27 PM   #1
Grathan is offline Grathan  United States
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Default Tube ID and suggestions

I have bought my first amp and was curious about getting some replacement tubes. Unfortunately I don't know much about tubes.

The markings on the tubes are:

ECC 83
made in great britain
B9K3, (one says B9J5)

and the power tubes

Philips ECG 8713 aml
34167 usa

These don't appear to be common based on a few searches. Can I please get a few recommendations on some tubes that would sound as great or better.

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Old 8th February 2009, 03:47 PM   #2
SY is offline SY  United States
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ECC83 and 6L6GC are among the most common tubes ever made and are still in production from multiple sources. There should be no problem finding replacements. Start with Triode Electronics, Antique Electronic Supply, and Jim McShane.
"You tell me whar a man gits his corn pone, en I'll tell you what his 'pinions is."
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Old 8th February 2009, 04:58 PM   #3
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Location: Monroe Township, NJ
SY is quite correct. Talk to Jim McShane and give him the make and model of your amp.

The 6L6GCs are easy. Buy SED (=C=) tubes made in St. Petersburg, Russia. Which 12AX7/ECC83 you acquire depends on the type of service the amp is in. For HIFI, Saratov, Russia, made and Mullard labeled long plate ECC83s will keep the sound close to OEM. For musical instrument service, ElectroHarmonix (EH) branded tubes, also made at New Sensor's Saratov plant, would be a reasonable choice. In music reproduction, the "tone" of the tubes is very important. OTOH, in a combo guitar amp, resistance to microphonics is key.

BTW, the made in England Mullard tubes currently in situ are EXCELLENT. Leave them in service, until they can no longer perform.
Eli D.
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Old 8th February 2009, 11:56 PM   #4
Grathan is offline Grathan  United States
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Join Date: Feb 2009
Thanks for the help. I am gonna give quad match of =c= seds a try.

You guys couldn't reccomend a good book on amps?
Peticularly one that covers tube amps and creating gain stages and tube clipping circuits? A good walkthrough on biasing is a plus. thanks
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