This is where it all started:

 

An HMV Model 163 of vintage 1930.

The "Re-entrant" horn was specially designed to give the best possible sound. It consisted of a complicated folded internal horn that divided twice into different chambers providing a long exponential development of the sound waves. This technique was used in later years for the exponential horns used for Public Address speakers and even in the hf horns found in today's active speakers like the Mackie SWA1521

 

This is a working example in excellent condition. You can see the logo of Nipper that spent a number of years running around in Richmond Park, Surrey. This model is owned by a person living in Richmond. We will get some sound examples for you to hear very shortly.

 

 

For more information on Nipper visit:

 

History of Nipper

Some examples of Repairs/Renovations:
Ampeg B15 N
Remanufactured Mains Transformer for the B15 (240v)
Roland Chorus Echo Model RE 501
Ferrograph Series 5 used for archive material
Fender Twin Reverb
Wire recorder fully restored - vintage 1951 with original recordings taken at the Guildhall School of Music by Professor Leslie Taylor, who was the music Director at the time
Marshall Head
Vox
 
Mesa
  

 

 

Just a Note:

This page is currently being updated. More exciting things will be appearing very shortly. If you have any comments or suggestions, please address the webmaster on the contact page. Thanks

 

 




CONTACT:

S-Tech Engineering
The Amp. Hospital,
PO Box 169,
West Molesey,
Tel/Fax:
+44 (0)208 8730927

 

Eric Charles Douglas.

(Cousin)

 

This is the person I will always be eternally grateful to. When I was twelve years old he introduced me into the world of Electronics. First building a Transistorised Amp for a Crystal set and then a Valve Amplifier! This was followed by a Tape Recorder based on a Collaro Deck.

Eric was a Design Engineer for EMI of Blyth Road Hayes, Middlesex. He held several patents relating to Magnetic Recording and Tranducer Equipment. Back in the 1950's he was paramount in the design of a portable tape recorder which our present Queen took on her honeymoon. As well as these inventions, the Tilt Tray which we take for granted on all our desk top monitors, was initially proposed by him following his transfer to the Plessey Group of companies in Poole. I thus had a very good founding and with the 'Thick-Sandwich' degree course with full workshop training provided by Wayne Kerr Laboratories, it put me in great stead. In the same group was the Ferrograph company, which following graduation I became involved with in the design of the Logic 7, Studio models intended for commercial radio stations and various Test Equipment. It has been a hobby which turned to a life-long profession and which I still love today.

In later life Eric so much enjoyed his love of drawing and visualisation that he occupied himself drawing up the construction of Veteran vehicles taken from Books and by visits to the Beaulieu Motor Museum. These wonderful drawings are now able to be seen at www.veterancardrawings.com. A print of these can be framed and are available for purchase. They make an ideal focal point in studies, entrance halls, town museums, reception areas etc. Why not be one of the first to get one of these unique drawings for your own pleasure?