Treetop Circuits | Products and Sales
receivers, Product Detector
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.
SB-51 Product Detector / SSB Adapter
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-75 Product Detector / SSB Adapter
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.
We ship within three business days of payment, via Canada Post, which takes 4-10 business days (occasionally longer). Be advised that tracking is not provided outside Canada. Other services are a bit faster, and provide tracking, but are much more expensive and may bill you for brokerage.
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