10. MAINTENANCE
There are only a couple topics for general maintenance with the UnFairchild. First, is the issue of when to
keep it ON and when to turn it OFF: There are differing opinions on this but my rule of thumb with tube gear
is to leave it on if I am going to be using it again the next day and turn it off if I won’t be using it again for a
couple days or more. The trade off here is the stress on the tubes caused by powering up/down vs. leaving
the tubes on and racking up unnecessary hours on the tubes. We won’t know for sure what is better until
these units have been around long enough for people to start reporting back to us with their results either
way.
The second issue is the eventual replacement of tubes. They should last a long time under normal circum-
stances but there is always the possibility of a tube getting smashed or unexpectedly failing prematurely.
You can acquire tubes yourself and follow the balancing instructions in section 5 or you can contact us
about purchasing a replacement tube directly from UTA.
11. SPECIFICATIONS
Input
Impedance.............................................
2.5KΩ
Output
Impedance.........................................
200Ω
Output Level.....................................................
+4dB @ 0Vu
(+28dBm clipping point)
Gain......................................................................
20dB
(in 1dB steps)
Frequency Response ....................................
20hz - 20Khz (+0/-.5dB)
Noise
Level........................................................
-83dB
Harmonic Distortion.....................................
Better 1% at +18dB
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