Drake SPR-4 Radio Receiver 5-NB Noise Blanker

Description

This module is a working 5-NB board manufactured and sold by RL Drake as an optional accessory for their SPR-4 receiver.  If you own a Drake SPR-4 receiver, you know that it is a great classic receiver dating from 1968 to 1979 and was Drake's first fully solid state general coverage receiver. Its capabilities are legendary and collectors of vintage equipment relish the SPR-4 as a very sensitive receiver. The RL Drake Company did not offer a lot of accessories with the SPR-4, but did make calibrator and noise blanker modules available to enhance listening.  In addition, they sold extra crystals to expand the bands available for the user to tune into more frequencies than the factory supplied crystals.  (and we offer a variety of spare crystals in our Ebay store)
This module is the 5-NB noise blanker that can be installed in a matter of minutes by a non-technical person.  You merely remove 6 screws to take off the top cover, remove the jumper cable, and then gently push the noise blanker board into the socket.  After replacing the top cover, the noise blanker is installed and ready to use by turning on with the front panel selector.
This 5-NB comes with a copy of the installation directions and this also includes a schematic of the 5-NB circuit.
Drake noise blankers work better than many other noise blankers installed on other receivers of that era.  The 5-NB will not get rid of all noise, but will greatly reduce man-made noise coming from pulse sources found from household wiring, fluorescent lamps, lamp dimmers, etc.  It will also work on noise that comes from car ignition systems, but will do little to improve random noise generated by atmospheric conditions.
This 5-NB is not easy to come by as it was not a cheap module when originally sold.  By installing it in your SPR-4, you can more fully equip your receiver to achieve full operational standards.
Please use the Ebay shipping calculator to determine your shipping cost.  This cost includes proper packing materials for safe delivery and insurance cost against damage or loss.
Those buyers living outside the USA are also welcome to purchase from us.  We have shipped to 105 countries during the past 22 years on Ebay and we are happy to ship virtually anywhere in the world.  You may use the shipping calculator to determine your shipping cost via either priority or express mail.
Please keep in mind that this cost does not include any import, customs, or VAT fees.  If you are uncertain of these costs, we ask you to check with your local post office prior to making a purchase from us.  Thank you!
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