5314027803

8

THE SHORT W A V E MAGAZINE

March, 1980

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WATERS &

STANTON

ELECTRONICS

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Ali major items delivered by Securicor within

24 hours

A NEW EXPERIENCE

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TRIO    R1000    TRIO

The R 1000 uses an advanced PLL system in an up-conversion I scheme to a high (48MHz) first IF to remove any possibility of image responses. The receiver covers the entire frequency rangę from bełow 200kHz right up to 30MHz in 30 bands, each 1MHz wide The bands are selected. 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 network in the RF stages of the receiver so there are no "preselector" or "antennatrim" Controls to twiddle simplyset the band switch to the rangę reguired — 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 umts which can be cłimmed 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

shapefactorof betterthan 1:2 6:60dB. Selectable sidebands are available at the touch of a switch.

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

To minimise front end overload. a step RF atteniiator 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 mountmg. 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.

Up until now we have been taking orders on a waiting list system because of short supply of this item. Hopefully by the time you read this we will be able to supply from stock. And remember all our R1000 are given our fuli pre delivery check and then despatched promptly to reach you within 24hours of us receiving your order. That's real servicel Just one of the many thmgs that make morę and morę people come to us for all their amateur radio needs.

£298 inc. VAT