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28 Apr 2008Kenwood TS-520, 530, 820 & 820 series transceivers
03 Apr 2008Interaction of ALC and NFB in the Kenwood Hybrids TS-520 - TS-830S
20 Jan 2008Kenwood TS-520 Series, Possibly other Valve Models.
01 Apr 2007TS-520 / 820 Series PA Modifications
01 Sep 2005Kenwood TS-520 Power connector
30 Mar 2001Increase the semsitivity for 10 and 15 meter band
02 Apr 2000DS-2 Replaces DS-1A DC-DC Converter
18 Mar 2000Adding IF output to the TS-520 and TS-520S tranceivers for use with th SM-220
20 Feb 2000TS-520/520S BS-5 Sweep interference
12 Feb 2000AM Broadcarst interferenc in TS-520
12 Feb 2000TS-520 Novice Operation (75 watts)
05 Jun 1999TS-520S MARS Mod for 4.0-4.6MHz
05 Apr 1999Kenwood TS-520S for QRP
19 Jul 1998TS-520 Increased sensitivity, Better audio and Amplitude Modulation
19 Jul 1998TS-520/520S CW Frequency Shift
19 Jul 1998TS-520S -6v Supply Failure
19 Jul 1998Service notes on TS-520
19 Jul 1998DG-5 Standard Service Procedure
19 Jul 1998TS-520, TS-820 CW filter select control
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