Intruder
User's Manual
Aiken Amplification, Inc.
1225 Montague Avenue
Greenwood, SC, 29649
Tel: 864-993-8383
http://www.aikenamps.com
Page 1: ...Intruder User s Manual Aiken Amplification Inc 1225 Montague Avenue Greenwood SC 29649 Tel 864 993 8383 http www aikenamps com...
Page 2: ...Contents Getting Started 3 Front Panel Controls and Switches 5 Rear Panel Controls and Switches 7 Tube layout and replacement 9 Biasing 11 Speakers 13 Troubleshooting 14 Specifications 17...
Page 3: ...to reconfigure the preamp section to early plexi style for a full rich tone great for warm clean tones or the later aluminum or ali style preamp which is voiced brighter and tighter in the low end be...
Page 4: ...tors 630V axial leaded polypropylene film foil capacitors and low noise sealed 2W mil style RV4 pots Massive custom wound high interleave transformers rated for over twice the maximum amplifier output...
Page 5: ...The plexi setting is warmer with more low end and excels for clean tones or for fattening up bright single coil pickup guitars such as Telecasters Because the plexi ali switch completely reconfigures...
Page 6: ...on The pilot lamp features a screw on jewel that can be removed from the front panel to replace the bulb without having to remove the chassis The bulb is a standard 47 bayonet style bulb available at...
Page 7: ...dance Selector The impedance selector allows selection of 4 8 or 16 ohm output impedance to match the speaker in use Be sure to set this switch to the appropriate setting for the speaker or speakers c...
Page 8: ...s like Radio Shack and use standard cables to connect the effects Once properly connected adjust the effects unit s input level control so the signal presence LED is lit if there is one and the clip L...
Page 9: ...sist on NOS tubes for a true vintage tone The JJ Teslas are the least microphonic but are a bit compressed sounding when compared to the longer plate tubes The Chinese 12AX7 s are a good compromise be...
Page 10: ...for the tubes to warm up 7 Bias the amplifier as indicated in the next section on biasing but instead of setting the bias adjustment to a max range of 60mV on the test jacks set it no higher than 30m...
Page 11: ...e highest current side Check the voltage from the black tip jack to the left red tip jack and then to the right red tip jack and adjust the bias for 30mV or 60mV for 30W amps 45mV for 50W amps on the...
Page 12: ...screen grid resistors or other amplifier components The HT fuse should prevent any major damage to output or power transformers or other expensive components IntruderMKIIManual doc 06 17 13 Page 12 o...
Page 13: ...pronounced a midrange so they may tend to sound subjectively better in an open back cabinet The G12H30 is preferred in a 1x12 configuration by many customers as is the Greenback Newer Chinese made G1...
Page 14: ...pass any pedals and plug straight in with a known good cable to test Is the effects loop jack dirty or broken Try plugging a cord into the effects loop jack and back out several times to clean the jac...
Page 15: ...a blown speaker or one with a warped frame Buzzing noises that occur only on certain notes can be indicative of a cabinet problem Check all rear panel screws handle screws and chassis mounting screws...
Page 16: ...should be replaced In a emergency you can swap the other ECC83 12AX7 preamp tubes around until you find the least microphonic one to put in the first position Typically the phase inverter tube is the...
Page 17: ...two EL84 18W model or two EL34 30W or 50W models 18W 100V 120V Mains 2A slo blo HT 500mA fast acting 18W 200V 240V Mains 1A slo blo HT 500mA fast acting 30W 50W 100V 120V Mains 3A slo blo HT 500mA fas...
