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Desktop Shortwave Transmitter
Desktop Shortwave Transmitter
Desktop ULF/VLF Receiver

General

HAM bands 80m  40m  20m  15m  10m  80m  40m  20m  15m  10m  2000m 
Freq. stability ? ? ?
Tuning steps ? ? Continuous

Receiver

RX-range - - 15-500 / 500-1500 kHz (2 ranges, 7 bands)
Modulations - - AM   CW   FSK  
Sensitivity ? ? 6 µV
Selectivity ? ? ?
Filters ? ? 0.1 / 1 / 2 / 4 / 8 kHz
Receiver system ? ? Double conversion cuperheterodyne, including circuit arragement for cancelling drift of crystal oscillator (34 tubes)
IF-freqs. ? ? ?
Image rejection ? ? ?
Audio output ? ? 500 mW unbalanced, 10 mW balanced

Transmitter

TX-range 10-80 m 10-80 m -
Modulations AM   CW   CW   SSB   -
RF-output CW: 500 W (input), AM: 375 W (input) 100 W ?

Connections

Antenna - - Proprietary
Impedance ? 50 Ω 125Ω
Other - - -

Electrical

Power req. Mains Mains Mains (115/230 V AC)
Current RX - - 250 W with oven on, 150 W when oven off
TX ? ? -

Physical

Manufactured Between 1948 and 19xx in USA Between 196x and 196x in USA Between 1951 and 19xx in USA
Dimensions ? 374.65 × 196.85 × 317.5 mm
(14.75 × 7.75 × 12.50 in)
483 × 267 × 438 mm
(19.02 × 10.51 × 17.24 in)
Weight ? 7.26 kg (16.0 lbs) 37.20 kg (82.1 lbs) including power supply PP-621/URR
Form factor Base Station Base Station Base Station

Other features

Memories ? ? None
Usage Amateur / Ham radio operators Amateur / Ham radio operators Amateur / Ham radio operators
Features ? ? Operating altitude up to 10,000 feet
Accessories ? ? ?
MPN COLLINS-000310A-3-/-30K-1 COLLINS-000032S-3A COLLINS-R-000389/URR