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Unpacking and installing the clock
Figure 2–3 Tubes installed in sockets
Once you have inserted all six tubes, we recommend you perform a
segment test as shown in Section 8.3 to verify that all of your tubes
are working properly with all segments lighting as expected, no tubes
substantially brighter or dimmer than the others, and so on. If you
discover any problems, try exchanging tubes between sockets. If the
problem stays with the tube, you have a bad tube and should contact the
seller. If the problem stays with the socket, there may be a problem with
the clock and you should refer to Section 8.4 for assistance.
Either at this time or later on, you may want to clean the tubes. We have
found that removing the tube and carefully blotting it with a damp paper
towel will remove most accumulated grime. Be careful when cleaning the
back of the tube, as it is easy to wipe off the factory print with the brand,
date code, etc. Some tubes sold as surplus in the 1970’s may have price
stickers on the top which are somewhat harder to remove. Patience is key
here.
There is normally no need to attempt to clean the underside of the tubes
where the pins are located.
Once each tube is cleaned and dry, re-install it in the clock. You may want
to use cotton gloves to avoid getting fingerprints all over your nice clean
tubes.
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