Treetop Circuits Documents

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PD-3

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.
Product Manual Rev. 8, February 2010.

SB-51

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.
Product Manual Rev. 4, December 2011.

SB-75

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.
Product Manual Rev. 4, December 2011.

LC-1 Active Probe System

This is a versatile active probe system for use with oscilloscopes, spectrum analyzers, network analyzers, and other instruments. It places very little load on the circuit being tested, and can be successfully used in high-frequency circuits, high-impedance circuits, tuned circuits and the like where conventional probes would upset circuit operation.
LC-1 Product Manual Rev. 1, January 2012.



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