I have a Sinclair Q-305D duplexer that I would like to get specifications for. Does anyone on the group know, or have any info on this unit? I believe this goes back a few years and it is not mentioned on the Sinclair website. The label on the product reflects the old company name Sinclair Radio Laboratories. This unit is a UHF duplexer, but that's all I know about it. I have retuned it to where I want it, but have not made any attempt to determine isolation; however, the insertion loss is very good. Looks to be around 1.5db at 440Mhz. Anyone familiar with this unit?
