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   DIR Return to: Galaxy DX-959 Mods
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       #Post#: 6--------------------------------------------------
       Galaxy DX-959 Broad-banding
   DIR By: kycbradio
       Date: October 5, 2018, 3:16 am
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       Galaxy DX-959 Broad-banding
       This mod is not recommended for the novice.
       Additional channels (with slight variation of coverage) can be
       made available which requires the use of SPDT switches instead
       of SPST switches. This also requires the attachment of the P7
       control line to the switch so that the line coming from the PLL
       on the main board is switched between the original control line
       (P5 or P6) and P7.
       Some people feel this mod is really more trouble than it's worth
       (and may be potentially dangerous) since the P5/P6 channel mod
       in the steps above safely provides more than enough extras. Ever
       compare it to the old Cobra 148 GTL channel mod? The Galaxy ends
       up with roughly the same extra frequencies!
       Note:
       According to Galaxy, broad-banding (opening the PLL to it's
       fullest potential) the DX-959 simply requires the removal of
       diode "D3" on the VCO module. The earlier radios had this diode.
       If it is not there on yours, then you have the later model which
       already comes without it. Another alternative is to replace c296
       with a .0015uf capacitor. Two different techs say either method
       will work -providing the VCO doesn't lock up... it's possible,
       but it shouldn't
       A Better Alternative: VIAGRA!!!
       The new "Viagra" channel boards are a much safer and depending
       on the channels you want, a better way to go. These kits are
       readily available, rather simple to install, and you get 120
       channels. However, as you can see below, the range differs from
       the P5 / P6 channel mod above.
       P5 / P6 mod range: 26.695 to 27.965
       (Goes higher than the Viagra mod, but not as low)
       ~ 23 channels below and 49 above (112 channels total) ~
       Viagra mod range: 26.515 to 27.855
       (Goes lower than the P5 / P6 mod, but not as high)
       ~ 40 channels below and 40 above (120 channels total) ~
       So basically, there are only 8 channels missing with the P5/P6
       mod.
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