User's Manual

418 Users manual Release 1.00 – NOVEMBER, 2011
Part #74468
Printed in USA 14
8. In Case of Difficulty
While we cannot cover every possible
problem, here are some hints for dealing with
some potential difficulties. Check the
obvious. Is your dc power source okay?
Check power supply, cable and connector(s).
Is the 25 ampere fuse loose or missing?
Antenna problems? Try a dummy load. Is a
proper antenna connected? Is any
external antenna switch connected and
properly set?
Problem: Distorted SSB transmit – or –
Perceived RFI in the shack.
The ALC LED should flash on voice peaks,
but not remain continuously lit in SSB modes.
A frequent cause of a distorted SSB signal is
inadequate RF grounding resulting in RF
feedback. Common RF grounding problems
are no ground connection, or too long a lead
to a good ground. Many problems relate to
the lack of an RF station ground, as
contrasted with a safety ground connection.
We recommend bonding all equipment
chassis together with short heavy metal braid
or strap. Make these connections from
chassis ground lug to chassis ground lug and
connect the last piece in the chain feeding the
antenna to a good earth ground. This lead
needs to be as short as possible. Lengths near
¼ wavelength on any band used can be
particularly troublesome when the far end is
connected to earth. It is very important that
the external power supply and the transceiver
and all equipment with grounding lugs are
properly grounded.
Another potential cause of distorted SSB
arises when the station is in the near field of
the antenna. This is a problem many
apartment dwellers face.
RF can also be induced on any unshielded
wires.
Problem: 418 power shuts off while
transmitting
The 418 is equipped with a silicon-controlled
rectifier that opens if the PA current draw
exceeds an instantaneous power of
approximately 30 amps. This will shut off
power to the mosfet finals. Excessive current
draw can indicate a problem with excessive
SWR due to antenna or feedline problems.
Power to the 418 can be restored by cycling
the power switch off and on or the 13.8 Vdc
source off and on.
If the above do not solve your problem,
please consult with our service department
[phone] or [e-mail]
9. Warranty & Return Policy
Warranty policy for Ten-Tec products is
covered in the gold color page located on the
last page of this manual.
FOR EQUIPMENT MANUFACTURED BY
TEN-TEC: TEN-TEC factory built radio
equipment is sold under a 30-day risk-free
trial period. Any piece of equipment
manufactured by TEN-TEC may be returned,
undamaged, within 30 days of purchase for a
full purchase price refund, less shipping
charges (customer pays shipping both ways).
If you want to return a piece of equipment
purchased from TEN-TEC, please call the
sales department at [phone] from 8
a.m. to 5 p.m. Eastern time, Mon-Fri and
obtain a return merchandise authorization
number. Calling in advance for an RMA
number allows us to quickly process your
return and refund once your item arrives.
Ship return items with letter enclosed inside
the box noting the RMA number and your
name, address, and telephone number.
Return items are shipped to
TEN-TEC INC, 1185 Dolly Parton Pkwy,
Sevierville, TN 37862 USA.