Electronic Products for 1925

In 1925 the number of models was increases to ten, and prices were again slightly reduced. The receivers were 2, 3 or 4 valve T.R.F's. There were also a number of other products, including audio amplifiers, loudspeakers and headphones.

The picture opposite shows the front page of the 1925 radio catalogue. The receivers were still aimed at the top end of the market, as can be seen from the photograph on the front page.
The type 'Z', 2 valve receiver was a very basic receiver, consisting of an aerial tuned circuit, detector and single stage audio amplifier.

It was a table-top model, in a mahogany cabinet with lid, and came complete with the loudspeaker. The receiver with all accessories sold for £13.18s.6d. 

 

Read what A.J.S. had to say about the receiver


        
The A.J.S. 2 Valve Standard Receiver, type 'D6', consisted of a tuned high frequency amplifier and a detector. The receiver was not capable of driving a loudspeaker and so headphones had to be used.

It was housed in an oak or mahogany, sloping panel case and with all accessories, sold for £16.17s.6d. The receiver on its own sold for £11.10s.0d.
The following paragraph is from the sales literature:
"This is a moderately priced receiver for the man who desires to listen to distant broadcast on telephones on any wavelength from 150 metres upwards, according to the longwave plug-in coils used. The first valve is a high frequency amplifier, and is followed by a detector. Provision has been made to allow the valves to be turned off and on, and a wavelength switch is provided with three positions, 'Short', 'Broadcast' and 'Long'. This model has not been designed to operate a loudspeaker, and for this reason the phone to loudspeaker switch has been dispensed with. If, however, loudspeaker reception is desired, any one of the A.J.S. amplifiers described in publication No.119 may be connected across the telephone terminals. This model is only made in one style of cabinet, and that is illustrated."
The A.J.S. 3 valve receiver type 'E6' consists of a tuned high frequency amplifier, detector and single stage audio amplifier. It is housed in an oak or mahogany, sloping panel case, and sold for £14.17s.6d on its own, or £21.13s.6d with all accessories.

The accessories included a pair of headphones, but a loudspeaker had to be purchased separately. The receiver can only drive a loudspeaker at a modest volume. If more volume is required, an A,J.S. amplifier also had to be purchased.
The A.J.S. 4 valve receiver type 'F6' consists of a tuned high frequency amplifier, detector and two stage audio amplifier. It is housed in an oak or mahogany, sloping panel case, and sold for £18.10s.0d on its own, or £26.15s.0d with all accessories.

It was basically the same as the 'E6', except that it could provide a much higher sound level from a loudspeaker, due to the extra audio amplifier stage. This receiver was available in a variety of cabinets.
All A.J.S. receivers at the time used Mullard valves. The plug-in resistors below each valve, in the photograph above, allowed different valves with different filament voltages, to be used, by inserting different values of resistance.

The photograph opposite shows an A.J.S. table receiver type 'TM2', which is a 4 valve receiver, in an oak or mahogany table top cabinet. The receiver, complete with accessories, sold for £30.10s.0d., or on its own £21.5s.0d.

The receiver was also available in an ornate mahogany case, and was called the Table De Luxe Receiver, Type 'TM1'. The receiver with accessories sold for £35, or £25.15s.0d for the receiver alone.
The following text is from the 1925 catalogue, which describe the A.J.S. 4 valve receivers:

"The A.J.S. 4-valve model has been designed for those who desire to receive broadcast speech and music on a loudspeaker, no matter in what part of the country they are situated. The wavelength range of the receiver is from 150 metres upwards, according to the long wave plug-in coils used. The quality of the reception obtainable from all A.J.S. receivers is far above the average.

Most critical listeners have noticed that in radio the low notes are usually flat and very often are entirely lost. But with A.J.S. receivers these low notes all come through with their full value and richness of tone, and this perfect reproduction extends right up in the audible scale, and includes every overtone, nothing is lost.
The result is truly remarkable and is made possible by the choke method of coupling, which with suitable valves, such as the A.J.S. Mullard, give equal volume and considerably purer reproduction than the average transformer coupling so generally used."

The receiver opposite is the A.J.S. Pedestal Receiver Type 'P2'. The 4 valve receiver was available in an oak or mahogany cabinet, which included a horn loudspeaker and battery compartment. The receiver with accessories sold for £52, or £42.15s.0d. for the receiver alone.
The A.J.S. Pedestal De Luxe Receiver Type 'P1'. This 4 valve receiver was enclosed in a mahogany cabinet, which included a horn loudspeaker and battery compartment.

The receiver with accessories sold for £65, or £55.15s.0d. for the receiver alone.
The 4 valve A.J.S. Consol Receiver Type 'S1' is house in a fine mahogany cabinet, with centrally mounted horn loudspeaker.

The two side cupboards are for batteries, headphones and accessories.

The receiver and accessories sold for £75, or £65.15s.0d for the receiver alone.
The 4 valve A.J.S. Pedestal Cabinet receiver, was available in oak or mahogany, with built in metal horn loudspeaker and battery compartment.

The cost, complete with all accessories, was £51.18s.0d.
A.J.S. Loudspeakers

Several versions of A.J.S. horn loudspeakers were produced. The Standard Loudspeakers were 24" tall. The top of the range model had oak or mahogany flares, and sold for £4.15s.0d. The cheaper model had a metal horn, and was available in a black matt or stove finish, for £4, or in a grained wood finish for £4.5s.0d.

The Junior Loudspeakers were 19" tall, and had a metal horn. The model with a wood grained finish sold for £1.17s.6d., and the model with a black finish sold for £1.15s.0d.

There was also an enclosed loudspeaker in a mahogany cabinet, which was £4.15s.0d., or a pedestal model in a mahogany or rosewood cabinet. It sold for £22.10s.0d.

 


The wooden flare horn loudspeaker.


The Junior Model

 The following text is from the sales literature: "For the benefit of those who may consider the purchase of one of the cabinet models, not containing a loudspeaker, A.J.S. models may be had with wooden flares in oak and mahogany.
If metal horns are preferred on account of cost, or for any other reason, they may be had so skilfully hand finished with colour and graining that it is difficult to believe that they are metal, The lowest priced loudspeakers have a black crystalline finish. To those who desire something different to the horn loudspeaker, we would recommend our pedestal model, which in addition to being an exquisite piece of ornamental furniture, reproduces speech and music with such fidelity that it is well-nigh impossible to realise the fact that the sound emitted by it is a reproduction."

A pedestal loudspeaker.

Courtesy of
Dennis Yates.


Cabinet Model. Photo courtesy of John Chapman.
An A.J.S. model L.S.C. horn loudspeaker.

Courtesy of Konrad Birkner who is an administrator in the virtual Radiomuseum website at http://www.radiomuseum.org.
A view from the bottom of the above loudspeaker.

Courtesy of Konrad Birkner.


The A.J.S. plate on the above loudspeaker. Courtesy of Konrad Birkner.


Photo courtesy of John Chapman

 Although A.J.S. sold headphones they were actually made elsewhere and "badged" with the company's logo.
A.J.S. Amplifiers

A.J.S. produced a couple of audio amplifiers for use with receivers that either couldn't drive loudspeakers, or only had a low level of volume.

 The 2 valve amplifier was housed in a table top cabinet, with a lid that covered the valves. It sold for £7.10s.0d.

There was also a larger model called the 'Concert Amplifier', which sold for £11.15s.0d.
The two valve 'Concert' amplifier. Photo courtesy of John Chapman.
The A.J.S. Patent Rejector Circuit

This was used to remove interference from adjacent channels. It operated over a range of 150 to 700 metres and sold for £2.5s.0d.

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