Soundcraftsmen DX4200 preamp / EQ NEW SLIDERS RESTORED
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series.
*replaced phono input caps with metalized film, and electrolytics with Nichicon LK series
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned with Deoxit
*replaced all opamp IC chips with new Texas Instruments
*added decoupling caps to all IC chips
calibrated comparator LEDs and gain with signal generator
installed new sliders and PCBs
*cover, side panels, and handles repainted
*cleaned and tested
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It has Auto-Bridge which allows bridging with any common amp setup. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Auto-Bridge
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*two mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*three way tape dubbing
*low impedance headphone output
*front panel tape loop input and outputs
*two signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt
*S/N 114dB @ 10 volt, 100dB @ 2 volt
*octave controls +/-15dB
*precision tuned passive wire-wound coil inductors
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series.
*replaced phono input caps with metalized film, and electrolytics with Nichicon LK series
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned with Deoxit
*replaced all opamp IC chips with new Texas Instruments
*added decoupling caps to all IC chips
calibrated comparator LEDs and gain with signal generator
installed new sliders and PCBs
*cover, side panels, and handles repainted
*cleaned and tested
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It has Auto-Bridge which allows bridging with any common amp setup. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Auto-Bridge
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*two mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*three way tape dubbing
*low impedance headphone output
*front panel tape loop input and outputs
*two signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt
*S/N 114dB @ 10 volt, 100dB @ 2 volt
*octave controls +/-15dB
*precision tuned passive wire-wound coil inductors
SERVICED:
*all electrolytic capacitors replaced with Nichicon audio capacitors. A mix of 'Muse' and 'Fine Gold' series.
*replaced phono input caps with metalized film, and electrolytics with Nichicon LK series
*remelted and added solder to every switch pin
*switches and potentiometers lubed/cleaned with Deoxit
*replaced all opamp IC chips with new Texas Instruments
*added decoupling caps to all IC chips
calibrated comparator LEDs and gain with signal generator
installed new sliders and PCBs
*cover, side panels, and handles repainted
*cleaned and tested
This is what everyone wants! New sliders to get rid of the original sticky, out of spec, units. I am the only one who was taking them all apart and cleaning them. And now I am the only one with new PCBs and sliders to replace them all. This brings this unit into audio-nirvana with new sliders, capacitors, operational amplifier chips, and paint. Fully tested and ready to go.
This model is a preamp and equalizer combination with Differential-Comparator and phono Cartidge-Match systems. It has Auto-Bridge which allows bridging with any common amp setup. It had all electrolytic capacitors replaced with high quality Nichicon audio capacitors. All switches and pots were sprayed with deoxit and worked.
FEATURES:
*dual 10 band +/-15dB eq
*Differential/Comparator Unity Gain with LED balance
*Sub-sonic filter -3dB @ 15hz, 12dB/octave rolloff
*Auto-Bridge
*Cartridge-Match variable capacitance and impedance for cartridge matching.
*two mono phono preamps with individual phono input level adjustments
*moving coil cartridge inputs
*three way tape dubbing
*low impedance headphone output
*front panel tape loop input and outputs
*two signal processor loops
SPECIFICATIONS:
Preamp section:
*line level freq. response +/-0.25dB 5hz-100khz
*phono level freq. response +/-0.5dB 20hz-20khz
*THD 0.01% @ 1 volt
*IMD <0.01% @ 1 volt
*phono impedance 47k or 100 ohms
*phono capacitance 50-800pF
*phono S/N 97dB
*phono sensitivity 0.28mV
Equalizer section:
*Differential Comparator with LED 0.1dB accuracy
*THD <0.01% @ 2 volt
*IMD <0.01% @ 2 volt
*S/N 114dB @ 10 volt, 100dB @ 2 volt
*octave controls +/-15dB
*precision tuned passive wire-wound coil inductors