Mcintosh Mac 1900 Service Manual

Manual Library / McIntosh. McIntosh MAC4100. AM/FM Stereo Receiver (1982). BY1001+ service manual - BY3001+ service manual - test reports - Related Catalogues. Mac 1900 solid state stereo receiver am/fm mac service information from serial no. To al 9999 mclntosh audio new york division 2 chambers street. Your MAC 1900 AM-FM/FM stereo receiver will give you many years of pleasant and satisfactory performance. If you have any questions concerning the operation or maintenance of this receiver please contact: CUSTOMER SERVICE McIntosh Audio Division 2 Chambers Street Binghamton, New York 13903 Our telephone number is 607-723-3512 Take Advantage of.



McIntosh Laboratory is a manufacturer of high-end audio equipment based in Binghamton, New York. Founded in 1949 by Frank McIntosh, the firm is known for the quality of its products, amplifiers electronic tubes since the 1960s.


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Manual Library / McIntosh

Mcintosh Mac 1900 Service Manual

AM/FM Stereo Receiver (1982)

Description

Mcintosh Mac 1900 Service Manual Download

The phono amplifier in the MAC4100 uses a new high technology integrated circuit operational amplifier. Its differential input stage has been optimized for low noise and low distortion performance.

Electronic input selector switching uses field effect analogue switches. The mechanical input selector simply switches small amounts of DC which turn the FET analogue switches off or on. This design eliminates degradation of frequency response and also eliminates noise pickup from long signal paths necessary with conventional mechanical switching. It means, as well, that switch clicks and pops have been eliminated.

The equalizer amplifier is constructed with ion implanted junction field effect operational amplifiers. These new devices amplify signals with a 6 dB better signal to noise ratio than their bipolar counterparts.

Amplifiers are capable of delivering large quantities of power when they are driven to clipping. Clipping is caused when the amplifier is asked to produce more power output than it can deliver with low distortion.

The MAC4100 has a built-in waveform comparator that compares the wave shape of the input signal with the output signal. If the disparity between the two signals exceeds 0.5% a front panel signal illuminates in red at the top of the power output indicators, with any further increase in distortion the Power Guard circuit will operate.

Specifications

Tuning range: FM, MW

Power output: 75 watts per channel into 8Ω (stereo)

Frequency response: 20Hz to 20kHz

Total harmonic distortion: 0.05%

Damping factor: 30

Input sensitivity: 2mV (MM), 250mV (line)

Signal to noise ratio: 80dB (MM), 90dB (line)

Output: 250mV (line)

Speaker load impedance: 4Ω to 8Ω

Semiconductors: 31 x IC, 45 x transistors, 62 x diodes, 1 x SCR

Dimensions: 473 x 165 x 394mm

Weight: 19kg

Finish: satin silver front panel, walnut grained vinyl cabinet

Year: 1978

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