Kenwood TS-520S Hybrid Transceiver Tune-Up Cheat Sheet
For the Radio Amateur Amateur
**Copyright Trio-Kenwood Corp.| All rights reserved.
Location Control Position
FRONT PANEL CONTROLS
REAR PANEL CONTROLS
BAND Switch
POWER Switch
H. SW Switch
Stand-b Switch
MODE Switch
VOX Switch
MIC Ctl.
CAR Ctl.
METER Switch
PLATE Ctl.
DRIVE Ctl.
FUNCTION Switch
RIT Switch
SG Switch
EXT VFO Connector
Desired band
ON
ON
REC (RECEIVE)
USB or LSB depending on band
MAN
FULLY Counter-clockwise
Centered
IP (plate current)
Middle of the range for band
Centered
VFO
OFF
UP (ON)
Jumper plug inserted (see
manual)
I. PRE-TUNE UP
1. Connect to 50 Ohm dumm load, or 50 Ohm antenna w/ SWR of less than 2:1.
2. Set controls to the Initial Switch Settings for Transmission (see above table)
3. Tune knob to desired operating frequenc .
II. PLATE IDLING CURRENT
1. Flip SEND and check that plate current is 60 ma (milli-amperes). If not, adjust via BIAS
controls on the side panel. Switch back to REC.
1. NOTE If it is wa more than 60 ma, DO NOT leave the SEND switch on. It will
shorten the life of the final tubes.
III. DRIVE TUNING
1. Shift METER to ALC and MODE to TUN. Flip to SEND and peak (maximum meter
deflection) the ALC with the DRIVE CONTROL. Flip back to REC.
1. NOTE If there is no ALC reading indicated, increase the CAR control until there is a
reading.
IV. PLATE TUNING (READ BEFORE DOING)
1. Shift METER to IP, leave MODE at TUN and flip SEND.
2. QUICKLY adjust the PLATE control to dip the plate current (a minimum meter reading).
Flip back to REC.
1. NOTE With the radio in the TUN mode, most of the screen voltage is reduced b as
much as 50% and the ke ing circuit is shorted.
V. PLATE AND LOAD TUNING ( CAUTION: REALLY READ BEFORE DOING)
