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Need Audio Tech who knows tubes - Chicago area

Hello Friends - I own a Kondo Japan KSL Neiro 2A3 amp. An output tube recently went out and I will replace all four tubes. I've done some research and will probably purchase Emission Labs tubes. I have learned they need to be very finely matched to meet the needs of this particular amplifier. The tube matching is done by the EL by "gridding to the heater voltage" of the amp. Can anyone recommend a Chicago area audio technician/service proficient with SET tube amplifiers who can measure the heater voltage of my amplifier? I live in the Chicago northern suburbs. Thank you.
fineito

Showing 1 response by atmasphere

atmasphere's avatar
atmasphere
11,615 posts
 
"gridding to the heater voltage" is a new one on me and I have been at this for over 40 years. Something does not sound right with this...

FWIW to any technician that can use a voltmeter, measuring the heater voltage will have a lot in common with a walk in the park. Nothing to it.

It sounds like what you are looking for are matched tubes which should not be hard with 2A3s. The tubes only need to be in pairs as the amplifier is stereo.
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