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© November 2009 Ben Duncan Research - UK & Russ Andrews Accessories Ltd - page 6 / 11

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The Mini-Zapperator comes into its own above 800MHz, including the 2 to 4GHz area of wireless 'consumer' equipment. It is essentially 'non-leaded', which means much less inductance in the connections, which otherwise diminishes and ultimately 'messes-up' the Zapperator or indeed, a Zobel's operation at high RF; or at least reduces its scope.This extension deeper into microwave territory of the new Zapperator-class component is achieved by the parts being 'built across' the conductor (cable) ends, as part of a 'Y node'. Meaning the port, the cable end and the Zapperator terminations are all joined as and at a star point.This is a specialised and delicate procedure, since few audio cables of any sort are ideally structured for microwave engineering, nor are the usual connectors. If they are, they are often then unsuited to high-end audio.

Figure 4 shows the predicted response extension, of the Mini Zapperator's attenuation - all above 1GHz. 'Realspace' plots are less neat and measurements are less easy to make, and may even be less definitive, but those made are essentially confirmatory. 8

Fig.4:

Overall, the Zapperator, with its high-flex leads, can be connected to any cable or system, at any level, while the mini-Zapperator is solely integrated into suitable cables.The optimum cables chosen were Kimber, because the woven structure has some special EM (electro-magnetic) properties that are apt to work synergistically with the Zapperator class of networks.

© November 2009 Ben Duncan Research - UK & Russ Andrews Accessories Ltd

Russ Andrews Accessories Ltd, 2b Moreland Court, Westmorland Business Park, Shap Road, Kendal, Cumbria, LA9 6NS, UK. Call UK Local Rate 0845 345 1550 Mon-Fri 9am-5pm, from abroad +44 1539 797300 Email info@russandrews.com Website www.russandrews.com

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