PFR-3 Troubleshooting

Spent some time tonight troubleshooting the dead rig. Found that U2 wasn’t seated properly. U2 is a SA612 that is used as a mixer from IF to audio after the xtal filter. Also found a solder blob that might have been hampering pins 3 and 4.

Taking this rig out of its case is more than what I had imagined. The manual warns of this, but found that they were not kidding. Found that I had to unsolder several wires to get everything free and out so I could work. But, did make a diagram of what I had undone so putting back in the case should not be much of a problem…other than having to re-solder several wires


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