[ForSale-Swap] PSK-31 rig or RF experimenter parts?

[dan wanchic]

I have two complete SSB transceiver IF assemblies from 70's era commercial 
grade HF equipment that each include a Collins mechanical filter for sale.

These boards serve both transmit and receive functions. They include an on 
board 2.9 KHz Collins mechanical filter. The manufacturer data says that the 
carrier suppression and opposite sideband rejection are both 50 dB.

These would make a very nice basis for a PSK-31 rig or by adding a DDS VFO, 
these would make a good basis for a nice transceiver project for someone who 
is technically inclined.

Set up as a dual conversion system; first IF is approx 1.5 MHz, second IF is 
455 kHz and also includes an LC filter for AM operation. The PC board has 
traces that support installation of a second mechanical filter.

Features on the IF PC board:

Balanced diode mixer to for conversion from 1.5 MHz to 455 kHz
Mechanical filter - 2.9 kHz bandwidth
U1 - first 455 kHz IF amp - CA-3028
U2 - second 455 kHz IF amp - CA-3028
U3 - third 455 kHz IF amp/product detector - CA-3028
U4 - first AGC amplifier - CA-3028
U5 - Transmit IF/balanced modulator - MC-1596
Plus 20 some transistors

Sophisticated AGC system that has a dual AGC delay time
AGC drives IF amp and provides drive to RF amp
S-meter driver circuit plus matching S-meter
manual RF gain control input
Transmit PPC (ALC)
Audio amp
T/R relay driver circuit
Local oscillator buffer
+12 volt operation

Circuit board approximately 5 1/2 by 9 inches with two 22 pin edge 
connectors.
These use standard 22 pin edge connectors. Used 2 chassis edge connectors 
included.

Also included is the matching oscillator board assembly and crystals for 
BFO: LSB & USB, 2nd local osc for 1.5 MHz to 455 kHz conversion, and 5 spare 
crystal oscillator circuits. This board has individual adjustment caps for 
each oscillator and there are separate oscillators for LSB, USB. There is 
also built-in clarifier circuit for receive function. There is also a 
crystal oven on the board.

Also includes matching S meter, audio amp assembly plus schematic diagram, 
block diagrams, pictorial (xray) diagram and other documentation.

All inquiries will be answered - technical questions welcome - I have a 
scanned schematic available for
serious inquiries.

$60.00 each set plus $5.00 for UPSP Priority mail shipping
or will ill sell both for $120.00 with free shipping

Dan WA8VZQ, St. Cloud, MN

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