HF/VHF Surveillance ReceiverAdd a review Add to my shack
The left part of the front panel has a panoramic display offering an visual survey on all R.F. emissions in a certain frequency segment. You can select the SWEEP WIDTH, the width of the band segment displayed up to 300 kHz, adjust the SM GAIN, the level of the signals displayed and move the most interesting signal in the middle of the display using the CENTER FREQ control.
The controls of the receiver itself are located on the right half of the front panel: At the right, just above the headphones jack, you find the AUDIO GAIN volume control combined with the mains switch, at it's left the main tuning knob. The receiver is equipped with a mechanical film dial with coarse frequency markings, you can also read the reception frequency from the nixie tubes frequency display, the option DRO-290-A1 is installed in all Swiss receivers. Of the two analog meters, one is used as signal strength meter and the second one as center indicator when the set is set to FM operation.
Do you know this rig? Tell us something about it!
Estimating the value of a rig can be challenging. We collect prices paid by real hams over the years to help you estimate the value of a used Watkins-Johnson WJ-521A-1. Just bought or sold this model? Let us know what you traded it for and help other ham operators!
These estimates are based on the following prices: