Products and Manuals

SB-390 Product Detector / SSB Adapter

$150 Canadian plus shipping

This adapter provides excellent SSB reception in R-390 and R-390A receivers. Like our other adapters, it uses a single-balanced product detector circuit with a broad dynamic range and a dual-time-constant AGC system. All controls operate as before, with minor exceptions. It mounts on the back of the receiver, and is powered from the receiver. AM operation is unaffected.

SB-390 Product Manual, Rev. 2, February 2013 for serial numbers 1 - 26.

SB-390 Product Manual, Rev. 3, May 2013 for serial numbers 27 - 36.

SB-390 Product Manual, Rev. 4, July 2013 for serial numbers 37 and up.

SB-390 Product Manual, Rev. 5, December 2014 for same serial numbers as Rev. 4. (Changes to manual, not to design.)

SB-390 Product Manual, Rev. 5a, November 2015 for same serial numbers as Rev 4. Fixed Figure 5 (the schematic diagram) which was improperly cropped. The revision number in the document is still Rev 5, not 5a.

N4LQ has made a video of R-390A with an SB-390 installed

SB-51 Product Detector / SSB Adapter

$80 Canadian plus shipping

This is the current SSB adapter for the 51J-3, 51J-4, R-388, and R-388A receivers. The product detector circuit is identical to that in the PD-3. The AGC circuit now uses a separate AGC amplifier for SSB, which provides a better "hang" characteristic. A dual-time-constant circuit resists blocking when impulse noise is present. AM performance is unchanged.

SB-51 Product Manual, Rev. 4, December 2011.

SB-51 Product Manual, Rev. 5, July 2014 for same serial numbers as Rev. 4. (Changes to manual, not to design.)

SB-600 Product Detector / SSB Adapter

$150 Canadian plus shipping

This adapter provides excellent SSB reception in the Hammarlund SP-600 Super Pro series of receivers. Like our other adapters, it uses a single-balanced product detector circuit with a broad dynamic range and a dual-time-constant AGC system. All controls operate as before, with minor exceptions. It mounts under the chassis, and is powered from the receiver. AM operation is unaffected.

SB-600 Product Manual, Rev 3, March 11, 2020

SB-75 Product Detector / SSB Adapter

$78 Canadian plus shipping

Incorporating circuits nearly identical to those in the SB-51, the SB-75 provides excellent SSB performance in the Collins 75A-2 and 75A-3 receivers. As with our other products, AM performance is unchanged. If an NBFM adapter is present in the receiver, its operation is unaffected.
SB-75 Product Manual Rev. 4, December 2011.

PD3 Product Detector / SSB Adapter

This is our original SSB Adapter for the Collins 51J and R-388 series receivers. It provides a high-level single-balanced product detector and a fast-attack slow-return AGC system for SSB. AM operation is unchanged. It was available until November, 2010, when it was replaced by the SB-51.
PD3 Product Manual, Rev. 8, February 2010.

For a brief explanation of SSB Adapters, see SSB Adapters Explained.

Prices updated June 2021