4
15. Lightning – for added protection for this product during a lightning storm, or when it is
left unattended and unused for long periods of time, unplug it from the wall outlet and
disconnect the antenna or cable system. This will prevent damage to the product due to
lightning and power-line surges.
16. Power Lines – an outside antenna should not be located in the vicinity of overhead power
lines, other electric light or power circuits, where it can fall into such power lines or
circuits. When installing an outside antenna system, use extreme care to prevent the
installer or antenna from touching power lines or circuits, as contact with them may be
fatal.
17. Overloading – do not overload wall outlets, extension cords, or power outlets as this can
result in fire or electric shock.
18. Object and Liquid Entry – never push objects of any kind into this product through the
openings as they may touch dangerous voltage points or short-out parts that could result
in a fire or electric shock. Never spill liquids of any kind on the product. Prevent any
flammable materials, such as curtains, drapes or other materials from being positioned on
or near the product.
19. Ser vicing – do not attempt to service this product yourself as opening or removing covers
may expose you to dangerous voltage and other hazards. Refer all servicing to qualified
service personnel.
20. Damage Requiring Service – unplug the product from the wall outlet and refer servicing
to qualified service personnel under the following conditions:
a. When the power-supply cord or plug is damaged
b. If liquid has been spilled, or objects have fallen into the product.
c. If the product has been exposed to rain or water.
d. If the product does not operate normally when following the operating instructions.
e. If the product has been dropped or damaged in any way
f. When the product exhibits a distinct change in performance. This indicates the need
for ser vice.
21. Replacement Parts – when replacement parts are required, be sure the service technician
has used replacement parts specified by the manufacturer or have the same characteristics
as the original parts. Unauthorized substitutes may result in fire, electric shock and other
hazards.
22. Safety Check – upon completion of any service or repairs to this product, ask the service
technician to perfor m safety checks to determine that the product is in proper operating
condition.
23. Heat – the product should be located away from heat sources, such as radiators, heat
registers, stoves, or other products (including amplifiers) that produce heat.
NOTE TO CATV SYS TEM INSTALLERS :
THIS REMI NDER IS PROVIDE D TO I CALL THE
CATV SYSTEM IN STALL ER’S ATTENTION T O
ARTIC LE 820-40 O F THE NEC THAT
PROVIDES GUID ELINES FO R PROPE R
GRO UNDING AN D, IN PARTIC ULAR,
SPECIFI ES THAT THE CABLE GROUN D
SHALL BE CO NNECTED T O THE
GRO UNDING SY STEM OF THE BUILDING,
AS CLOSE TO T HE POINT OF C ABLE ENTRY
AS PRACTIC AL
Figur e A
Example o f an tenna groundi ng as per Natio nal Elect rical Code, ANSI/NFPA 70
ANTENNA
LEAD IN
WIRE
ANTENNA
DISCHARGE UN IT
(NEC SECT ION 810-2 0)
GRO UNDING CO ND UCTORS
(NEC SECT ION 810-2 1)
GRO UND CLAMP S
POWER SERVI CE G ROU NDING
ELECTRODE SY ST EM
(NEC SRT 250,PART H)
GRO UND CLAMP
ELECTRI C
SERVICE
EQU IPMENT
13
Zeng DeJun is a well-known name in the Chinese audio industry where his reputation as a
designer, teacher, entrepreneur and business man is legendary. He's the designer of China's
first Hi-Fi vacuum tube amplifier, a founding member of the nation's Hi-Fi vacuum tube
industry and designer of many lines of hi-end multimedia speakers and numerous Hi-Fi
products with cult followings in Asia. In 1994, Zeng founded the Shenzhen V.A.L.
Technology Co., Ltd. to finally pursue a lifetime goal of manufacturing a line of unique Hi-Fi
retro radios based on the classic wooden receivers of his youth that first kindled his love of
radio.
Some of Zeng's earliest memories as a child are of the beautiful wood radios in his home that
brought voice and music and sparked his curiosity towards science and technology. He recalls
that as a young child he asked how such a box could do such magical things but received no
clear answer. One day, when no others were around, he opened the back cover of the radio but
could not find the small people he had imagined were inside. All he saw were the glowing
bulbs (tubes) and lumps of iron (transformers). His parents couldn't explain how the radio
worked and told him that when he grew up and studied, he would be able to understand.
Thus began Zeng's lifetime love and curiosity in radio and science. In school and led by
teachers and others, he began to assemble simple crystal radios and more sophisticated
versions. Growing up in a remote area, radio was both the fastest and most effective way to
learn of news and information from the outside world. Later, as a new recruit in the Army, he
found and repaired a faulty transistor radio for a superior who was so impressed that he gave
Zeng the option of choosing the specialty for which he'd receive advanced training. Zeng
chose the communications corp where he was quickly trained for radio communications.
Always curious and inventive, he found existing military radios heavy and outdated so he set
about designing and building lightweight versions that earned him an Outstanding Innovation
Award and a transfer to the army research institute. Later, he was sent to Beijing Aviation and
Aeronautics University to study, after graduation he became a senior engineer and lecturer in
the Army and a new phase of his life began.
Over many years and many changes in his life, Zeng found radio programming and music to be
a close companion that gave him strength to pass difficult times and challenges. Having spent
many years in the audio industry, Zeng is familiar with high quality music systems and CD
players but prefers the fresh music selection and information found on radio. He prefers to
work in an office with a good table radio and, in part, this is one reason why he dreamed of
designing and manufacturing a quality radio set like the ones he recalled from his youth.
Having designed and built the first commercial Hi-Fi vacuum tube amplifiers as well as the Hi-
End brand of V.A.L. tube amplifiers, he had often thought of designing high quality table
radios, and saw this as an area no other companies had pursued.
The Tesslor Story
