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Quicksilver Mono Amps use no circuit boards or transistors. They are hand-wired with the best
parts available. All tubes are run well within their ratings and are protected from turn-on surge.
All these factors contribute to the Quicksilver Mono Amplifiers' excellent reliability.
SPECIAL FEATURES
Tubes should be replaced only with the same type and brand originally in the amplifier. The
8417 output tubes must be replaced as a matched pair and should be purchased through
Quicksilver Audio or a Quicksilver dealer. Quicksilver Output Tubes are "burned-in" for 10
hours prior to matching, and their performance is guaranteed. IMPORTANT:
The output
tubes must be biased when replaced (see Initial Turn-on).
TUBE REPLACEMENT
If the 2 amp (slo-blo) fuse blows, replace it with the same type fuse and check the bias. A large
change could indicate a damaged 8417 tube.
No change in bias would indicate other
problems, such as poor system grounding, an unstable preamp, a shorted speaker, etc. If
fuse blowing continues these possibilities should be checked. Substituting the 8417s and the
fuse from the other amp will also help to diagnose the problem. If the problem follows the
output tubes then they are probably damaged.
FUSE BLOWING
To insure trouble-free operation from your Quicksilvers, the following tips are recommended.
Connect and disconnect the preamp only when the amps are off. Don't drive the amps hard
when they are cold, or with the speakers disconnected.
NOTE: The output tubes are very sensitive during their first 50 hours of operation.
AVOIDING POTENTIAL PROBLEMS
Screw terminals are used fer speaker connection
because of their superior sonic
performance. The output transformer wires are silver soldered directly to the screw strips
eliminating any output wiring. Placing the amp directly behind the speaker with a very short
speaker wire will further improve the performance. The connection to the 4 or 8 ohm tap will
be determined by the rating on the back of your speaker system. The 1 ohm tap is for special
applications only.
SPEAKER CONNECTION
Insert the tubes in their proper sockets. Connect the amp into the system and turn it on. Make
sure the bias is between 80 and 110 ma after 60 seconds or so, and is between11 0 and 120
ma after 20 minutes or more of operation. Check bias once a month or so.
INITIAL TURN-ON
The Quicksilver Mono Amp is designed to give the best of tube amp performance at
a
price
previously not possible. To ensure this performance these instructions should be followed
closely.
THE 8417G
MONO AMPLIFIER
OPERATING INSTRUCTIONS
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