#152

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I purchased this from eBay, had channel mods, worked OK, I just had to restore it to factory condition.

The radio had pin 10 tied to the Fin pin through a switch to give it the +128 channels, so I decided to investigate this modification and try to understand why it works, and also clear up why there are various versions of this modification which all work, just in different ways.

Analysis of PLL mod here:    • #151 MB8719 Experiments and Tri State...  

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Some Of My Electronics Tools (video and purchase links)
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Boonton
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4220.
8210: https://defs.link/?u=e1eddc


Fluke
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8842A:
45: https://defs.link/?u=eac51d
343A: https://defs.link/?u=13c93d
5200A: https://defs.link/?u=a43c99
540B: https://defs.link/?u=0c6bd9
893A.
A90.


HP/Agilent/Keysight
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4261A: https://defs.link/?u=07ed95
5005A.
5342A 18GHz: https://defs.link/?u=5f7513
6181B: https://defs.link/?u=b12aef
8012B: https://defs.link/?u=ca5764
8648B: https://defs.link/?u=da52a3
8901B: https://defs.link/?u=535835
DSOX1102G: https://defs.link/?u=a68d39 https://defs.link/?u=12d498
E3646A: https://defs.link/?u=128f4a


Marconi
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2022D.
2955.
TF2103: https://defs.link/?u=61baaa


Rohde & Schwarz
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SMY: https://defs.link/?u=93514b
CMU200: https://defs.link/?u=8ccd72
Polarad SPN: https://defs.link/?u=2ead82


Siglent
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SDM3065X: https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SDS2102 (hacked to 340MHz): https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SPL-1008.
SDP1168X: https://defs.link/?u=1ed0fe https://defs.link/?u=12d498
SDL1020X-E: https://defs.link/?u=a0eccb


Other Equipment
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KSGER T12 Soldering Iron: https://defs.link/?u=620ace http://defs.link/?u=5c112e
Quick 861DW: https://defs.link/?u=138c0f https://defs.link/?u=a3fc81
S-993A: https://defs.link/?u=079677 https://defs.link/?u=e855a0
EEVBlog BM235: https://defs.link/?u=12d498
YR1030 Battery ESR: https://defs.link/?u=c56527
Heathkit IT-12 Signal Tracer.
Racal Dana 1992: https://defs.link/?u=8eeeba
Bird 43: https://defs.link/?u=4b18f7
Sinadder 3: https://defs.link/?u=2bf1dd
Audio Control SA-3050A RTA: https://defs.link/?u=a04df2
Korad KA3305D: https://defs.link/?u=69090a
PDVS2mini: https://defs.link/?u=869ba4
Valhalla 2703: https://defs.link/?u=06bcfc
Feeltech FY6800: https://defs.link/?u=8b98cd http://defs.link/?u=34d101
Eakins Microscope: https://defs.link/?u=b0278b https://defs.link/?u=262327
Mustool G600: https://defs.link/?u=b8bc26 https://defs.link/?u=33f0aa


Handheld Equipment
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Uni-T UT210E: https://defs.link/?u=391ce3 https://defs.link/?u=ea4edc
DER DE-5000: https://defs.link/?u=0d9160 https://defs.link/?u=12d498
MK-328: https://defs.link/?u=0d9160 https://defs.link/?u=739ee7
MESR-100: https://defs.link/?u=0d9160 https://defs.link/?u=009419
ESR Meter: https://defs.link/?u=0d9160
HOPI: https://defs.link/?u=7fab55
PeakMeter PM6252: https://defs.link/?u=59ef66
HS1010: https://defs.link/?u=10c699
Thermal Camera: https://defs.link/?u=280cca https://defs.link/?u=4a2256