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Post subject: Advice on mismatched 6v6 power tubes in DRRI
Posted: Thu May 23, 2019 1:38 pm
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Joined: Thu May 23, 2019 1:33 pm
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Hi

I've recently bought 2 new Electro Harmonix 6V6 power tubes for my DRRI. When I took a reading with my Eurotubes bias meter I notice that the ma readings between the 2 tubes are about 4ma apart.

One is set at 24ma and the other is 20ma. I usually try to buy matched power tubes, but the company I bought from https://www.thomann.de/ did not offer this option.

Is this going to be an issue if I use these tubes when they are not matched.

thanks for any advice
John


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Post subject: Re: Advice on mismatched 6v6 power tubes in DRRI
Posted: Sun May 26, 2019 1:36 am
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Joined: Fri Feb 05, 2010 4:31 am
Posts: 14045
Location: Province de Québec, Canada
Good new, you tubes are perfectly matched.
Difference up to 8 milliamp make tubes/ amp more musical than 0 ma witch may sound more sterile.

I never pay for matched power tubes, they are always in specs . I bought them from The tubes store.
If you put "perfectly " matched tubes, ( 0 ma ) after many hours of playing they could be "unmatched " :lol:

No issue , enjoy your amp


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