Ten-Tec 1253 Assembly And Instruction Manual page 48

7-50. Turn the receiver ON and observe that LED1 near the
switch is on, and ONE bandswitch LED is on. Press the band-
switch through its entire 9-band cycle to confirm correct
operation. REVIEW the tests done in Phase 4 to re familiarize
yourself with R6 trimmer adjustment.
7-51. With the front panel regeneration control at its midway
position, advance the bandswitch to 17/16 Meter Band and
check for the presence of regeneration or actual signals. If you
DO hear regeneration, make sure you can hear it no matter
where you turn the Main Tuning knob, even if you must re-adjust
the front panel regeneration control several times through the
range of the Main Tuning.
7-52. If you did NOT hear regeneration on the 17/16 Meter
Band per step 7-51, slowly adjust R6 from its clockwise position
until you get the results described in step 7-51 .
7-53. Advance the bandswitch to the 15/13 Meter Band.
Realize first that this band covers the extreme high range of this
particular receiver design. Adjust R6 as needed so that you
detect regeneration throughout the Main Tuning range; frequent
adjustment of the front panel Regeneration control will be
needed.
7-54. Reset the bandswitch system to Band 1 (160 meters).
Verify that regeneration starts as you rotate the front panel
control from its far left (counterclockwise) position. You will
hear actual signals mostly during fall/winter evenings unless you
live in a coastal area with nearby navigation beacon signals.
7-55. In brief: adjust trimmer R6 so you can experience
regeneration on all bands, realizing that turning Main Tuning or
changing RF Gain control setting can require frequent touching
up of the setting of the Regeneration control.
7-56. When you become satisfied that the regeneration
system works on all 9 tuning bands, turn DC power OFF.
7-57. If you have any concern about whether you wired
correctly the 1/4" stereo phone jack, check it out NOW before
installing the battery assembly. Turn the receiver on and adjust
control as needed to hear something, anything! Plug in any set
of stereo or mono headphones and listen -- to ensure that the
headphones are active and that the speaker is muted (silent).
(If no headphones are handy, ANY 1/4" plug can be inserted to
verify cutting off of speaker audio.)
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