5314027800

VOL. XXXVIII

MARCH 1980

NUMBER1

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TRIO R1000

£298

inc VAT Carr £4.50

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The R-1000 uses an advanced PLL system in an up-conversion scheme to a high (48MHz) first IF to remove any possibility of image responses. The receiver covers the entire frequency rangę from below 200kHz right up to 30MHz in 30 bands, each 1MHz wide. The bands are sełected, not by ambiguous knob twiddling as in receivers using the Wadley loop but by a 30 position band switch which Controls the PLL system.

The band switch also electronically selects the appropriate band pass filter net work in the RF stages of the receiver so there are no "preselector" or "antenna trim" Controls to twiddle — simply set the band switch to the rangę required — that's it!

A highly stable VFO tunes each 1 MHz rangę and its linear, back lit scalę makes readout easy. However, in addition to this dial, Trio have also provided 5 digit true frequency digital readout so as to guarantee spot on accuracy on any frequency. As a further feature, the digital display can also be switched to read time, this being derived from a quartz standard. Marvellous for accurate log keeping. The display uses high intensity readout units which can be dimmed for use in Iow light conditions.

As for what else is inside this superb instrument — selectivity is

catered for by three custom madę IF filters; a 12kHz wide AM

filter; 6kHz narrow AM filter; and a new 2.7kHz SSB filter with a

shape factor of better than 1:2 6:60dB. Selectable sidebands

are available at the touch of a switch.

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For the first time in mid-price receiver, a true noise blanker is provided to remove pulse type ignition noise.

To minimise front end overload, a step RF attenuator is included which gives 0 60dB attenuation in four steps.

Ali the rear panel connectors are recessed on a sloping panel so that you can stand the receiver either on its back, or pushed hard against a wali when used in conventional shelf mounting. The antenna inputs allow the use of either a high impedance wire aerial or a 50ohm balanced input so that the proverbial long lump of wire will work really well with the R-1000.

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This receiver is so advanced it makes everything in its price rangę completely obsolete.

LOWE ELECTRONICS LTD. CHESTERFIELD ROAD, MATLOCK, DERBYSHIRE.

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