Ampro

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AMPRO

This catlog is a gift from Chris Bird. Last pic is an ad - dunno source.

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Dave W has sent some useful info and pictures. The following is basically his.

UK Ampros are from two sources. US built 110v machines were sold under license in the UK with a transformer. These machines used the US line-up of valves, and a 110v lamp and motor.

UK built (Simplex-Ampro) 240v machines used 240v lamp and motor, and a different valve line-up (and circuit).

Simplex-Ampro 110v machines were also built in the UK (especially the later models) and these used the US voltage. There are slight but important discrepancies in sizes and parts between US-made machines and UK-made machines.

The pics are of a Stylist Major Mk1V, which is 110v UK made. It is silver, with all metal rollers and guides. The base box is much deeper than the standard Stylist, to accommodate a vastly improved amp unit, using a 110v transformer run with a 5Z4GT rectifier. Output is 2 x 6BW6, giving 12.5 watts undistorted. The mains transformer is even mounted on a swivel platform so that fields and hum can be reduced. (I later found the leaflet).

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This machine has a greatly improved gate and swing pressure plate arrangement, making cleaning much easier. Also, the film path is improved at the sound head, simplifying loading. You can see the Mag head switch (control) in the pics this lowers the head onto the film strip in a choice of two positions. This machine has the facility to record also, but this needed an external unit. The sound drum flywheel is a very heavy and finely balanced unit, which is covered on the non op side of the machine.

Dave reports the picture is very stable and loss of bottom loop can be corrected without stopping. The audio has very much better wow and flutter etc than the standard Stylists.

There was also a mag sound version. Robert Fergusson sent me this info.

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Before these grey Stylist models came the Educational, which was I think brown, and the Premier, which I think came in both brown and, earlier, black. And of course, there was a silent machine - note the same basic mech, to which you could add sound. And even 8mm! And an un-named pre-Premier. It appears this was available in a silent version, too, from the reference in Home Movies and Home Talkies in 1940.

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Circuit and wiring diagrams for Premier 20.

 

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