Hi Greg, W9GB
Your 4-pin device is probably a Dual Gate Mosfet 40673 that was very popular and inexpensive for use in VHF preamplifiers in the early 1970s
In a separate email I have sent to you a typical schematic diagram of a 10 meter preamplifier using the above 4 pin device and I hope this helps.
73" de
i8CVS Domenico
----- Original Message ----- From: "G. Beat" [email protected] To: [email protected] Sent: Thursday, September 28, 2006 11:54 PM Subject: [amsat-bb] Sinclair Radio Labs A-2C08D
This orphan RF pre-amplifier (Model A-2C08D) landed on my door step.
It is a VHF (132 - 174 MHz) pre-amplifier that Sinclair Radio Labs (Tonawanda, NY) marketed in the 1970s. Its a Manhattan style construction in a nice Pomona box :-)
Of course, this orphan does not work. Chance that anyone may have a schematic? ... likely a 4-pin FET ... before I open it up on the workbench next week?
Initial e-mail to current Sinclair went un-answered. Phone call likely next, but I doubt they have the schematic for this old pre-amp on-file.
Greg w9gb
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