Quad FM Tuner / 22 Control Amplifier / II Power Amplifiers

Quad FM Tuner

The outstanding feature of VHF/FM transmissions is the high quality of reproduction which may be obtained when used with modern high standard amplifiers and loudspeakers.
At the same time the system is essentially less prone than AM to interference due to both other stations and noise. It provides therefore the answer to the two most pressing problems of reception conditions today.
It is essential, of course, that the receiver design should accommodate both these points if full advantage is to be taken of the service. In the QUAD FM Tuner careful control of the bandwidth throughout the receiver has made it possible to obtain both low distortion and high noise rejection whilst the limitation of frequency response is that imposed by the transmitter rather than the receiver, assuming correspondingly good amplifiers and loudspeakers.
With the very high frequencies used for FM broadcasting, drift of the receiver tuning is a problem. In the QUAD FM Tuner temperature compensation together with automatic frequency control ensures that it remains correctly on tune from the moment of switching on. To simplify tuning, a unique display has been developed giving a positive indication of accurate tuning, with the obvious advantage over more conventional types with which it is necessary to detune the receiver to check whether or not it was on tune! This indicator shows a tuning error of I part in 10,000.
A precision mechanism prevents tuning error due to backlash and provides a smooth and accurate control.
The dial shows the frequency range of the receiver (87.5 to 108 Mc/s) covering both British and American bands, and adjustable Station Indicators, which may be set to the scale settings corresponding to your own local stations, enable the required programme to be selected without having to search the band.
The mounting arrangements are of the same design as the other units in the QUAD series, combining simplicity and rigidity with a ‘clean’ finish showing no screwheads, etc., when installed.
Each Tuner is supplied with leads and plugs for direct connection to the QUAD II amplifier, which provides the necessary power supplies, but the Tuner may be used with other amplifiers if desired.
The strength of signal to be expected in any area will, of course, depend on the distance from the transmitter and the nature of the terrain between transmitter and receiver, but the performance of the QUAD FM Tuner will be maintained well into the fringe areas. The type of aerial will, of course, depend mainly on the locality of the installation and your local Dealer will be in the best position to advise on this matter.

Quad 22 Control Amplifier

The Quad 22 Control unit provides full facilities for either mono or stereo operation. Used with one power amplifier the Quad 22 provides full mono facilities; used with two power amplifiers it provides for both mono and stereo; both channels may also be used for mono when required, by pressing the “2 MON” pushbuttons.
Three easily distinguished types of control are used for the three main functions of selecting programme, adjusting volume and modifying signal as to tone, range, etc. The Control unit Is compact, easily mounted (or may be used free standing if preferred) and combines simplicity and rigidity with a “clean” finish.
The six pushbuttons perform 19 different functions, all clearly marked. Two provide for selection of stereo or mono. or two channel mono, and also switch the second amplifier on or off as required. The other four select the programme source in either stereo or mono from radio, microphone, disc (with 4 different equalisation characteristics) or tape.
Sockets are provided for permanent connection of all radio tuners, pickups, tape recorders, etc… used with the unit.
Plug-in adaptor units enable any pickup to be matched accurately and a chart Is provided showing the pushbutton combination required to provide correct equalisation for different makes of record, old and new. Tape recordings (mono or stereo) may be made without affecting normal listening to the programme being recorded, and replayed either via the tape recorder pre-amplifier or direct from the head with compensation for any characteristic.

Quad II Power Amplifier

The QUAD II power amplifier contains no controls and may therefore be mounted inside the cabinet, leaving only the control unit panel (and that of the radio tuner it fitted) visible on the outside. Stability, and hence performance, are entirely independent of signal or load conditions and the amplifier is therefore suitable for use with any loudspeaker arrangement.
The performance specification is fully maintained with random replacements from normal valve stocks without the need for matching or alignment of any kind, and the output stage uses the now traditional QUAD cathode coupled arrangement combining low distortion with an efficiency which is reflected in the compact size of the equipment.
Mechanical: All windings are impregnated and housed in compound filled casings. All metalwork fully rust-proof processed and stoved steel grey. Metalwork, rust-proofing, finishing, transformer winding, assembly and tests are all carried out under the constant supervision of our approved inspection section. The amplifier is suitable for use under all climatic conditions.

Quad FM Tuner

Tuning Range: 87.5 - 108 Hz
Output: 100 mV at 100 kOhms impedance
Consumption: 6.3 v. 1.85 A; 330 v. 27 mA
Dimensions: 267 (W) x 165 (D) x 89 (H) mm
Weight: 2.7 kg

Quad 22 Control Amplifier

Frequency response: 20 Hz to 20 kHz
Total harmonic distortion: 0.02%
Input sensitivity: 1.5 mV (mic), 0.4 mV (MM), 70 mV (line)
Signal to noise ratio: 70 dB (line)
Output: 250 mV (line), 1.4 V (Pre out)
Valve complement: 2 x EF86, 2 x ECC83
Dimensions: 267 (W) x 165 (D) x 89 (H) mm
Weight: 3.1 kg

Quad II Power Amplifier

Power Output: 15 watts throughout the range 20 Hz - 20 kHz
Input Sensitivity: 1.4 VRMS for 15 watts output
Frequency Response:
Within 0 - 2 dB, 20 Hz - 20 kHz
Within 0 - 5 dB, 10 Hz - 50 kHz
Distortion: Less than 0.1% at 700 Hz
Dimensions: 330.2 (W) x 101.6 (D) x 165 (H) mm
Weight: 8.3 kg

Turnaround

Orders will usually dispatched within 2 working days of receiving cleared payment.

Shipping Rates

We calculate your shipping rate based on the total weight of your items and your delivery address. Standard shipping to the UK Mainland (excludes Northern Ireland, Isle of Man, Channel Islands) is free, except where specifically indicated. Don't worry, you'll always see the final shipping charge displayed before you reach the payment step (on the checkout page).

Carriers

We despatch the bulk of our UK mainland items on a 24 hour service.  Non-Mainland locations – Isle of Man, Isle of Wight, the Scilly Isles, the Scottish highlands and Islands, the Channel Islands and Northern Ireland may take a day or so longer. Smaller items are delivered using Royal Mail 24 or special delivery. Larger items are delivered using a courier service such as UPS and occasionally by a Pallet service.

Order Tracking

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