HRO Var. 5 (according to Moore)

• alternative name: National Toy Co.
• Brand: Thrillbox

Coverage : 1.7 – 30 MHz ( 4 standard ganged coil sets for 1.7 – 4, 3.5 – 7.3, 7 – 14.4, 14 – 30 MHz included, 2 coil sets for broadcast immediately available at extra cost, 7 more coil sets Additional coils (50-100, 100-200, 180-430, 480-960 and 900-2050 kHz) sold later including long waves and up to VHF ( total spectrum covered from 50 kHz to 54 MHz ).

Modes AM / CW/SSB (BFO).

The 0 – 500 epicyclic readout dial allows for continuous analog tuning while digitally indicating incremental progress over a range of ten full turns of the large tuning knob that tunes with velvet smoothness. Ten times the circumference of the dial is nearly 4 meters on a normal dial scale, which delivers great frequency resolution. The dial is not calibrated to directly indicate a frequency but a frequency calibration chart is necessary to determine the correct operation frequency.

HRO-model with knobs with metal skirts (selectivity control in right upper corner also with metal skirt), round metal labels around AVC and B+ switches, black micrometer dial and round S-meter, S-meter toggle switch; printed metal calibration charts on coilsets. Usually rectangular IF filter shielding cans.

External "dog house" type power supply : PSU 697 (filaments 6.3 V AC, B+ 240 V DC) used as standard.

This model variant has been used for HRO-5, HRO-M, HRO-W (tropicalised) sets.

Donde encontrará 446 modelos, 285 con imágenes y 189 con esquemas.
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