tube matching machine
Torres Engineering Tube Matching Machine.
This was a
technical problem to
figure out. The companies providing the matched tubes were not able to
keep up and we wanted higher quality, we REALLY build tube amps
all day, every day. This is an important thing we need to
the best amps.
A typical tube tester is
accurate enough to match a dual triode tube like a 12AX7/12AT7.
We wanted to test the
tubes under the load conditions they encounter inside your
amp, so we had
to design and make our own super-accurate matching machine. The first
part of the tech project.
The next part of the job
was to determine the proper loads and voltages necessary. But
the real difficulty was
in getting EXACTLY the same
loads and voltages on both sides of the
The solution came in a
thought - use EXACTLY
the same parts for both! Our machine switches the loads
from one triode to the other so both sides are matched
to grid, cathode and plate readings that are exactly the same.
Of course this require a
person with proper knowledge reading and testing the tubes, not a
problem for us.
Every single tube is
up, and checked for only the ones that match very, very accurately to
get the best possible tone from the amp.
We will be adding more
matched tubes as we get time to properly test them.
final notes on web page
Legendary Book "Inside Tube Amps" is now
available on Amazon/Kindle
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I am retired due to illness,
but getting better!
in business 42 years