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Quad FM-3

VHF/FM broadcasting is intended to provide reception, within the service area of the transmitter (normally 50 to 100 miles) free of interference and capable of reproduction at very high quality. The Quad FM3 tuner will completely fulfil this purpose with any transmission which arrives at the aerial in a condition capable of full quality recovery. Outside the service area of the transmitter it is the nature of VHF/FM for signal strength to fall rapidly and there will be a tendency to fading but the higher sensitivity of the FM3 tuner enables it to receive such signals with the reservation that no tuner can Improve the signal/noise ratio of the signal as it arrives at the aerial. Operating the FM3 is simple; the only control on the front of the FM3 tuner being the tuning knob (which is also used for setting the station markers) and no others are required. There is a pre-set noise suppression control at the rear of the tuner which when correctly adjusted enables the user to tune from one station to another through complete silence. All switching, mono hold, on/off, are provided by the associated Quad 33 control unit. The position on the scale of any five stations may be indicated by pre-set markers. These are positioned by pressing the tuning knob to engage its pointer with any marker in turn, tuning to the stations to be marked and releasing the knob. The markers then stay in position for future reference. The tuning indicator is the original Quad twin lamp system which provides for simple, positive and highly accurate tuning. To achieve (and maintain) the desired bandwidth and shape the tuner employs ceramic filtering. Weight 2.7kg.

Quad FM-3

Quad FM3

Tuner

 

Frequency range: 88-108 MHz

Aerial input: 75 ohms coaxial, 300 ohms balanced

Full limiting: From less than 2µV

Image rejection: 56dB

IF rejection: 80dB

400kHz selectivity: 46dB

Capture ratio: 3dB

 

IF bandwidth: Less than -3dB at ±120kHz, greater than -60dB at ±400kHz

Output at 38kHz and above: -50dB

 

Frequency response: ±1dB 20Hz-15kHz

Channel separation: 40dB at 1kHz

Distortion: At 1kHz and ±40kHz deviation: 0.3%

Output: 100mV per channel for 30% modulation

 

Source impedance: 5k ohms

Recommended load impedance: Greater than 50k ohms

Recommended load capacity: Less than 1000pF

De-emphasis: 50µ Sec or 75µ Sec as required

Power input: 100-125 or 200-250V, 50-60Hz 6VA

 

Width: 260mm

Height: 92mm freestanding, 83mm panel only

Depth: 165mm freestanding, 140mm behind cabinet panel when mounted (Plus 64mm for connectors).

Weight: 2.7kg

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