laboratory (10)

Precise vinyl record centering for turntables

Presenting a custom record centering accessory, intended as a very quick and simple way of centering vinyl records with oversize center holes.

This compact and lightweight accessory is simply placed on the center spindle of your turntable over the record and twisted, positioning the sharp edge between the spindle and record hole, taking up any excessive clearance.

[MISSING TRANSLATION] J. I. Agnew

Repairing a Westrex 2B cutter head

Some time ago we were asked to repair a vintage Westrex 2B feedback cutter head.
As with all Western Electric and Westrex products, their cutter heads were beautifully made and represented the state of the art in their time. Not only did they sound great, they also looked aesthetically pleasing, with curved lines that were not a trivial task to manufacture, in the days before CNC machine tools, CAD software and pocket calculators!

[MISSING TRANSLATION] J. I. Agnew

 Heater Wire Terminals

We now have hundreds of heater wire terminals in stock, as we are in the process of stocking up for the manufacturing of our new stereophonic cutter head. Since these items have been "unobtanium" for a long while now, we are happy to offer these individually or in pairs to anyone needing them for their vintage cutter heads, or those trying their luck at making DIY heads. 
 

[MISSING TRANSLATION] J. I. Agnew

The Reliable Stylus Heating System: Type 192

The Agnew Analog Reference Instrument Type 192 is a minimalist, industrial-grade stylus heater supply unit, designed and built to last forever.
It is a current-regulated design, set at the factory for 550 mA, in an ultra-ruggedized configuration, for maximum reliability in constant-duty environments, when downtime is not an option.

[MISSING TRANSLATION] J. I. Agnew

Testing Directly-Heated Triodes

In the darkest corner of the catacombs under the lab, illuminated only by glowing directly-heated triode filaments, top secret experimental research is being conducted…

[MISSING TRANSLATION] J. I. Agnew

Repairing a Dial Indicator

A simple yet effective movement which has seen many decades of regular use, appears under the lid of this dial indicator.

It was once able to indicate accurately in 0.01 mm graduations, through a gear train driven by a rack on one side of the spindle.

[MISSING TRANSLATION] J. I. Agnew

Lab Report: The Agnew Analog Stereophonic Cutter Head

Happy new year! Time to reveal what has been secretly developing in the lab throughout the past year: A stereophonic cutter head of an entirely unique design, invented by J. I. Agnew during his work with experimental transducers for measurement and testing purposes.

[MISSING TRANSLATION] J. I. Agnew

Critical listening at home: Audiophile High Fidelity Sound Reproducing Systems and the Recording Industry

Meet George Vardis, a retired biologist with a Master's Degree in Food Technology, residing in Athens, Greece. George is a sophisticated man with many interests, including sailing, photography, motorbikes, and music. He plays the piano and the guitar, but his career always steered well clear of the music industry. He was never a recording artist, nor was he a recording engineer. In fact, he has probably never seen a recording studio in real life.

[MISSING TRANSLATION] J. I. Agnew

Extensive Disk Recording Lathe Modifications: Fairchild Model 199 converted to Stereo with Caruso Feedback Cutter Head!

Back in 2015, we started a big lathe project, taking a beat-up Fairchild lathe from the 1930's, fitting it with an RCA cutter head, and eventually going full-on with a stereophonic feedback cutter head, vacuum clamp-down platter and automatically variable pitch.

[MISSING TRANSLATION] J. I. Agnew

Absolute Polarity for Disk Records

By J. I. Agnew
https://www.agnewanalog.com
https://www.magneticfidelity.com
PDF Version

The Mystery 

One might think that the whole issue of absolute polarity for a medium essentially invented around 130 years ago, would have been adequately discussed and standardised by now, leaving no room for further debates. Indeed, it has been, so why bother writing anything further on this topic?

[MISSING TRANSLATION] J. I. Agnew