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| Booster | |||
| 
     Brian May TB  | 
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| Si-tranzisztoros búszter | LPB-1 | 
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| Range Master | |||
| 
     Fetzer Valve  | 
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| 
     Super Hard On  | 
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| 
     MXR microamp (mod)  | 
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| 
     booster / overdrive  | 
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| 
     BB preamp  | 
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| nagy ARC  | 
      AC  és / vagy RC booster | 
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| luxusdrájv | 
      Luxury Drive | 
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| EPEkő | 
      EP booster | 
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| Buffer | |||
| buffer1 | 
      J-FET buffer  | 
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| buffer2 | 
      P. Cornish tervei alapján | 
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| buffer3 | OPA buffer, a Kentaurból |