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Cobra Radios |
Model |
Power Tips |
Mods |
Page 1 |
25 GTL 25 LTD 25 LTD CLASSIC |
L13,L10,L9,L8 L13,L10,L9,L8 L10,L9,L8 |
VR5 or Cut D-9 VR5 or Cut D-9 VR5 or Cut D-9 |
This mod is for all the Cobra 25's listed above. CUT D9 Change R76 to a 1k resistor Change R43 to a 2.7 ohm resistor Change R108 to a .47 ohm resistor Adjust L10,L9,L8 for max RF output Modification: Change stock final to a 2SC1969. Adjust L10,L9,L8 again Change C91 to a 33uf 16volt polarized electrolytic capacitor |
This mod is for all the Cobra 29's listed above. CUT D11 Adjust L17,,L20,L21,L16{Some Models},L14 for max RF output Modification: Change stock final to a 2SC1969 Change stock driver to a 2SC1957,{some model use a 2SC2028 rf driver}. Change R123 to a 0.47 ohm resistor Change R58 to a 2.7 ohm resistor. Change C71 to a 33uf 16volt polarized electrolytic capacitor Put a 47pf disc cap across C57 Put a 47pf disc cap across R55 For a higher dead key place a 100pf disc cap across C62{by rf driver} Key radio and say ahhhhhhhhhh while adjusting L17,L20,L121,L16,L14 Some models dead key 1-10 watts swing 20-30TRUE POWER, VR1 rx gain VR2 rx signal meter VR3 squelch VR4 AMC VR5 tx power meter VR6 antenna warning light |
29 GTL,LTD,and LTD CLASSIC |
L14,L13,L12 |
VR4 or Cut D-11 |