McIntosh MAC 1700 FM Receiver - Vintage 1960s - Working

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VINTAGE McIntosh MAC 1700 FM Receiver Serial number 1Z326 This is a McIntosh MAC1700 receiver -- made sometime between 1967 and 1973, back in the Golden Age of American Hi-fi. This beautiful receiver is big and heavy, and makes a very attractive sound. All front panel lights are working. It tunes in and plays stations, even without an antenna. Music plays from its Aux input. I plugged an RCA cable into the Phono inputs (it has two), to do a touch test. There was an audible buzz when I touched the hot (center) conductor of the RCA plug, so I know the Phono stages are amplifying. The MAC 1700 employs a vacuum tube FM Stereo tuner section with solid-state preamplifier and power amplifier circuits. It has the characteristic McIntosh "house sound" -- warm and solid, very easy on the ears. This unit is quite old (maybe 40 years) and is dusty. The Bass, Treble, Loudness and Volume controls all work, but are noisy. They should be cleaned with contact cleaner (Caig DeOxit recommended). I'm sure the tuner section could use a good alignment, but it does pull in the more powerful local stations without an antenna, so it's probably working well enough for most listeners. The walnut veneer cabinet is worn and a bit dusty, with some minor dings (visible in the pictures). A careful cleaning and oiling should make it look nice. I gave the faceplate a rub with a soft cloth and a citrus degreaser/cleaner and the tape residue came off nicely. The faceplate corners and edges are nice and square, and the front plate is smooth, with no gouges or dents. I think it will look very nice once it's cleaned and polished. I have not taken the chassis out of the wood cabinet, so I can't tell you if the tubes are original or replaced. You can't see any of the tubes from the back, just the power transformer, output transistors and the rest of the back panel. While I know this venerable classic powers on, tunes stations and plays music, it is quite old and should be refurbished with replacement electrolytic capacitors, new tubes and a good cleaning inside and out. MAC 1700 RECEIVER SPECIFICATIONS ELECTRICAL: Stereo, hybrid(solid state preamp and power amp, tube tuner). 40 watts per channel into 4 or 8 ohms. Frequency response 20Hz – 20kHz (+/- 0.5dB). Total harmonic distortion 0.25%. Hum and noise: power amp -90dB, aux -75dB, phono -76dB below 10mV. Damping factor 100. Input impedance (ohms): aux 250k, phono 47k, tape head 500k. Input sensitivity: aux 0.3V, phono 2.4mV, tape head 2.4mV. Tone controls: bass and treble. +18 to -18dB. Filter: 60Hz at 12dB/octave and 5kHz at 12dB/octave. FM SECTION: Sensitivity 2.5uV, S/N 65dB, Distortion 0.8% in stereo. Frequency response 20Hz to 20kHz, Capture ratio 2.0dB. Image rejection 60dB. Stereo separation 30dB. FRONT PANEL: Black and silver. Input selector: aux, tape, fm auto, phono 1, phono 2, tape hd. Balance. Slide switches: mode: stereo or mono. Filter: out or in. Tape Mon: out or in. Loud: out or in. Speaker: on or off. Headphone jack. Dual concentric bass and treble controls. Volume with power switch. Tuning knob. Tuning meter. Illuminated tuning dial. Indicator lights: FM MPX, AUX, TAPE, FM, PH 1, PH 2, TH, TAPE MON. BACK PANEL: Barrier strip speaker terminals. Screw terminals for 300 ohm and 75 ohm antenna. Ground terminal. Inputs: tape mon, aux, ph 1, ph 2, tape hd. Tape out 1. Muting control. AC outlets: 2 switched, one unswitched. Fuse. TUBES: 2-6DS4, 2-6HS6, 6AU6A, 6CS6, 6EA8, 12AU7. DIMENSIONS: 5.5” H, 16” W, 14.5” D. Weight 34 lbs. Sold from 1967 to 1973. Retail price in 1973 was $599. This item will be carefully packed for safe shipment. UPS Ground is preferred. This is a heavy unit (over 36 lbs. after packing for shipment), so shipping may be expensive. Please contact me with any special shipment requests. This item is a vintage electronic piece in need of some restoration, so is sold 'as is.' ! -- read more

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