Compare rigs

Compare specifications between amateur radios. Simply select up to 3 radios and compare them side-by-side, including images and descriptions.

Desktop ULF/VLF Receiver

General

HAM bands 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 -
Modulations -
RF-output ?

Connections

Antenna Proprietary
Impedance 125Ω
Other -

Electrical

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

Physical

Manufactured Between 1951 and 19xx in USA
Dimensions 483 × 267 × 438 mm
(19.02 × 10.51 × 17.24 in)
Weight 37.20 kg (82.1 lbs) including power supply PP-621/URR
Form factor Base Station

Other features

Memories None
Usage Amateur / Ham radio operators
Features Operating altitude up to 10,000 feet
Accessories ?
MPN COLLINS-R-000389/URR