TDL Technology, Inc.
Las Cruces, NM 88012
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Electret Condenser Microphone suits industrial applications.
Model 816 operates with Model 432 dual-channel preamplifier, which supplies DC operating power via embedded coaxial cable. Microphone cartridge is protected by 0.5 in. OD brass tube housing, which is covered with 2 layers of shrink tubing. Each microphone comes with measured sensitivity of 1,000 Hz and has frequency response of Ã-
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Phono Preamplifier operates from batteries or power mains.
Model 4041 is a rack-mount version of Model 404A Stereo RIAA Phono Preamp for both moving magnet and moving coil pickup cartridges. It is powered from furnished dc wall supply or internal rechargeable batteries, and has internal shielding to minimize pickup of unwanted interference.
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Preamplifier drives computer sound-card line input.
Model 421 High-Performance Stereo Microphone Preamp features 2 identical, differential input stages that use compound transistor pairs with circuit resistance values computer-optimized for very low output noise. Dynamic range is nearly 70 dB at full gain of 60 dB. Internal rechargeable batteries provide complete isolation from power mains, and cast-aluminum enclosure minimizes pickup of unwanted...
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Stereo Phono Preamp restores 78 RPM records.
Model 407 Stereo Phono Preamp drives sound card's line-input for restoring 78 RPM records. Variety of response curves can be set with turnover frequency and rolloff frequency controls. Internal rechargeable batteries provide complete isolation from power mains and cast aluminum enclosure minimizes pickup of unwanted interference. Improved signal to noise ratio can be achieved by copying records...
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Highpass/Lowpass Filter is controlled by microprocessor.
Model 601 contains tunable 8-pole Butterworth highpass filter followed by tunable 8-pole Butterworth lowpass filter. Both filter responses are flat in pass band (unity gain) and roll off at 96 dB per octave beyond corner frequency. Corner frequencies can be set from 100 Hz to 40 kHz at front panel or over serial link from PC. Unit includes input analog anti-aliasing lowpass filter, variable gain...
Read More »
Phono Preamp produces CD-quality wave files.
Model 403 Stereo RIAA Phono Preamp drives sound card's line-input for restoring vinyl LP records which were recorded using RIAA equalization. Preamp uses low-noise opamps and features very low output noise and power line hum pickup. Internal rechargeable batteries provide complete isolation from power mains and cast aluminum enclosure minimizes pickup of unwanted interference.
Read More »
Amplifier powers two channels.
Model 439 Two-Channel Attenuator-Amplifier has gain range of 118 dB in one dB steps from -78 to +40 dB. Gain is set by front panel rotary encoder and displayed on LCD. Each channel's gain can be set independently or they can be set together. Power amplifier is included to drive stereo headphone for audiometric testing or other use. Clock noise is eliminated by putting microprocessor into sleep...
Read More »
Microphone Preamp has internal, rechargeable batteries.
Model 401 high-performance microphone preamp's differential input stage uses compound transistor pairs with circuit resistance values, computer optimized for very low output noise. It drives computer sound cards' line-input, and is suitable in any application where very low noise gain is needed to condition low-impedance sensor output. Isolated from power mains, cast aluminum enclosure minimizes...
Read More »
Electret Condenser Microphone suits industrial applications.
Model 816 operates with Model 432 dual-channel preamplifier, which supplies DC operating power via embedded coaxial cable. Microphone cartridge is protected by 0.5 in. OD brass tube housing, which is covered with 2 layers of shrink tubing. Each microphone comes with measured sensitivity of 1,000 Hz and has frequency response of Ã-
Read More »
Phono Preamplifier operates from batteries or power mains.
Model 4041 is a rack-mount version of Model 404A Stereo RIAA Phono Preamp for both moving magnet and moving coil pickup cartridges. It is powered from furnished dc wall supply or internal rechargeable batteries, and has internal shielding to minimize pickup of unwanted interference.
Read More »
Preamplifier drives computer sound-card line input.
Model 421 High-Performance Stereo Microphone Preamp features 2 identical, differential input stages that use compound transistor pairs with circuit resistance values computer-optimized for very low output noise. Dynamic range is nearly 70 dB at full gain of 60 dB. Internal rechargeable batteries provide complete isolation from power mains, and cast-aluminum enclosure minimizes pickup of unwanted...
Read More »
Stereo Phono Preamp restores 78 RPM records.
Model 407 Stereo Phono Preamp drives sound card's line-input for restoring 78 RPM records. Variety of response curves can be set with turnover frequency and rolloff frequency controls. Internal rechargeable batteries provide complete isolation from power mains and cast aluminum enclosure minimizes pickup of unwanted interference. Improved signal to noise ratio can be achieved by copying records...
Read More »
Highpass/Lowpass Filter is controlled by microprocessor.
Model 601 contains tunable 8-pole Butterworth highpass filter followed by tunable 8-pole Butterworth lowpass filter. Both filter responses are flat in pass band (unity gain) and roll off at 96 dB per octave beyond corner frequency. Corner frequencies can be set from 100 Hz to 40 kHz at front panel or over serial link from PC. Unit includes input analog anti-aliasing lowpass filter, variable gain...
Read More »
Phono Preamp produces CD-quality wave files.
Model 403 Stereo RIAA Phono Preamp drives sound card's line-input for restoring vinyl LP records which were recorded using RIAA equalization. Preamp uses low-noise opamps and features very low output noise and power line hum pickup. Internal rechargeable batteries provide complete isolation from power mains and cast aluminum enclosure minimizes pickup of unwanted interference.
Read More »
Amplifier powers two channels.
Model 439 Two-Channel Attenuator-Amplifier has gain range of 118 dB in one dB steps from -78 to +40 dB. Gain is set by front panel rotary encoder and displayed on LCD. Each channel's gain can be set independently or they can be set together. Power amplifier is included to drive stereo headphone for audiometric testing or other use. Clock noise is eliminated by putting microprocessor into sleep...
Read More »
Microphone Preamp has internal, rechargeable batteries.
Model 401 high-performance microphone preamp's differential input stage uses compound transistor pairs with circuit resistance values, computer optimized for very low output noise. It drives computer sound cards' line-input, and is suitable in any application where very low noise gain is needed to condition low-impedance sensor output. Isolated from power mains, cast aluminum enclosure minimizes...
Read More »