SB104 TALKBACK FIX

[DMallozzi]

MODIFICATION FOR TALKBACK IN THE SB-104 / HW104 SERIES



FOUND THE FOLLOWING IN MY FILE. REMEMBER DOING THIS MOD FOR A GUY WHO TOOK HIS
NOVICE AND GENERAL WITH ME. THIS IS A PHOTOCOPIED SHEET , NO LOGO OR REFERENCE
TO HEATH, BUT I REMEMBER HE GOT IT FROM THE FACTORY AFTER A PHONE CALL. AS I
REMEMBER IT WORKED FINE, BUT I TAKE NO RESPONSIBILITY OR LIABILITY FOR THE
FOLLOWING.

HOPE IT HELPS SOMEONE.

CAN’T READ THE SIGNATURE ON THE SHEET, BUT LOOKS LIKE IT CAME FROM RON
NICKERSON (?) IN COMMUNICATIONS AT HEATH.

SB SERIES (sorry I never got a sheet for the HW104)

STEP 1
DISCONNECT GRAY WIRE FROM LUG 2 CW SWITCH AND RECONNECT TO LUG 3 OF THE TUNE
SWITCH

STEP 2
DISCONNECT THE JUMPER FROM LUG 3 OF THE TUNE SWITCH TO LUG 2 OF THE CW SWITCH

STEP 3
DISCONNECT THEWHITE-VIOLET WIRE FROM LUG 4 OF THE CW SWITCH AND RECONNECT THIS
WIRE TO LUG 6 OF THE HIGH SWITCH

STEP 4
DISCONNECT THE JUMPER RUNNING FROM LUG 6 OF THE CW SWITCH TO LUG 6 OF THE
LOWER SIDEBAND SWITCH.

STEP 5
DISCONNECT THE GRAY WIRE RUNNING FORM LUG 6 OF THE CW SWITCH AND RECONNECT IT
TO LUG 6 OF THE LOWER SIDEBAND SWITCH

STEP 6
INSTALL A 100 OHM 0.5 WATT (I-3) FROM THE HIGH SWITCH LUG 6 TO THE CW SWITCH
LUG 3

STEP 7
THERE IS AN ORANGE WIRE RUNNING FROM F19 TO THE RELAY PIN 11. DISCONNECT THIS
WIRE AT THE RELAY PIN 11 AND RECONNECT IT TO PIN 3 OF THE RELAY.

STEP 8
CONNECT ANOTHER ORANGE WIRE FROM F19 TO LUG 4 OF THE CW SWITCH

STEP 9
CONNECT A THIRD ORANGE WIRE FROM LUG 6 OF THE CW SWITCH TO PIN 3 OF THE K
BOARD

STEP 10
INSTALL A 1 KOHM (I-95) FROM PIN 19 OF THE F BOARD TO GROUND

--- --- --- --- --- --- --- --- --- --- --- --- --- --
To subscribe: listserv at listserv.tempe.gov
and in body: subscribe HEATH yourfirstname yourlastname
To unsubscribe:  listserv at listserv.tempe.gov
and in body: signoff HEATH
Archives for HEATH: http://www.tempe.gov/archives
--- --- --- --- --- --- --- --- --- --- --- --- --- --