| Cobra 139 XLR |
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| This radio has a 858 PLL chip. Click below to go to the PLL 858 Modification page. Power Modification 1) Change C174 to a 100pf. 2) Change C173 to a 220pf . 3) Re-tune L32, L30, L29, L28 for Maximum Forward Power on AM. VR7 Modulation VR8 AM Power CT7 SSB Power |