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© November 2009 Ben Duncan Research - UK & Russ Andrews Accessories Ltd - page 8 / 11

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Multiple, inter-related Benefits

In summary, suitably-dimensioned Zobel networks, and Zapperator- class networks all the more, are able to act to protect sound quality and high-end equipment, in several ways:

i) Reducing the rates of fast signals, spikes and impulses.These are rates many thousands of times above those of the highest audio signal frequencies so that ample reductions won’t affect audio quality one iota.

ii) Attenuating RF levels above useful audio frequencies, with a resistive termination impedance progressively developing at higher RF, where this is most valuable. Providing a stable RF termination to continuous or steady waves, close to a suitable value, for many real world conditions, where characteristic impedances are, in practice, complicated, multiple and partial.

iii) Operating as an attenuator of fast hard-edged impulses, from low- mid RF (far above audio), to SHF (microwave frequencies) with the Mini Zapperator extending well into microwave realms, the area where most mobile phones (except US), many satellite up/down links, and also wireless -audio and -LAN, all radiate.

iv) Operating as a fast spike absorber, and oscillatory event damper. With no risk of returned unwanted energies - unlike with filters - that employ inductors.

v) Providing a stable RF termination to continuous or steady waves, close to a suitable value, for many real world conditions, again where characteristic impedances are in practice, complicated, multiple and/or partial.

vi) Ease of application. Life is complicated enough. Zapperators are 'free-form' devices. Meaning their location - which end of the cable, and direction or polarity ('which way round') is unfussy.They may be openly experimented with.There are very few things to be wary of. In some instances, a Zapperator may be preferred, results-wise, when sited at the power amplifier 'end', or at the speaker 'end'. Or at both. Possible causes are myriad, and experiments are far quicker to conduct, and often more effective, than analysis! (experiments yield results; analysis yields paper. Paper is not a result.)

© 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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