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Message |
    
Badboyboris
New member
Username: Badboyboris
Post Number: 4
Registered: 12-2004
| | Posted on Sunday, January 16, 2005 - 3:08 pm: | 
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Hello, Could anyone please tell me how to get more mod out of my Cobra 29 Sound Tracker Night Watch? (I need to know what limiter to remove) If you can give me any more info it would be greatly appreciated. Thank you...........
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Sonoma
Intermediate Member
Username: Sonoma
Post Number: 151
Registered: 11-2001
| | Posted on Monday, January 17, 2005 - 10:31 pm: |
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D11 is the mod limiter.I prefer removing the jp36 jumper in front of the final and putting a 220 0r 470uf electrolitic capacitor across the two vacated holes with the negative leg towards the final and installing a 100 to 200 ohm resister accross the 2 legs to lower the dead key and increase the swing.put the resistor on the solder side and play with different ohms to get about a 2 watt dead key and it will get load and proud with this minor mod .also I will add a different version so you can decide.
Supertune: Replace the stock final with a 2SC1969 unit. Solder a jumper across R123. Solder a jumper across D8 (this may cause receive distortion at high volumes, remove jumper if it does). Solder a 68pf cap across C62. Solder a 68pf cap across C59 if there is already a 33pf across it. If there isn't, use 100pf instead. Replace R 55 with a 47-68k resistor, and solder a 33-55 pf cap across that resistor. Replace R58 with a 4.7 ohm resistor. Set VR4 just a bit to the right of half-way open. If D11 or C3 have been removed, replace them. If TR18 has been removed or cut, install a 2SA733. Spread Open L12 a bit, and adjust L16 for best swing, using a loud, steady "aaaaaaah" sound into the mic. MAKE SURE to use heat-sink compound (a light coating is sufficient) when mounting the new final, and MAKE SURE the final mount screw is tight!
Channel 9 switch to Channel 19: Cut D32. Hard, huh?
decide which you want to tackle.the 1st is as good as the 2nd and uses a lot less parts |
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