
3
Introduction
This manual will guide you through the replacement of the KSYN3 synthesizer(s) in your K3 transceiver with
the new KSYN3A synthesizer(s). No test equipment is required. Only a few hand tools are needed to assemble
your kit (see page Tools Required on page 7).
Should you have difficulty, you'll have our full support via phone and e-mail. In addition, we hope you'll join
our growing and enthusiastic community of owner/builders via the Elecraft reflector.
Basic K3s have one synthesizer. If you have the optional KRX3 Subreceiver installed in your K3 there will be
two synthesizers. If your K3 has both synthesizers, the both must be the same type. You cannot mix the new
KSYN3A synthesizer and the older KSYN3 in the same K3!
If you have the optional KRX3 Subreceiver installed in your K3 there will be two
synthesizers. If your K3 has both synthesizers, the both must be the same type. You cannot
mix the new KSYN3A synthesizer and the older KSYN3 in the same K3!
Checking Synthesizer Types
If you are unsure which synthesizer is installed in your K3, open the K3 top cover (see Removing Top Cover on
page 8). You don’t need to remove the top cover completely. Only lift it far enough to see the synthesizers (see
Figure 1). The old and new synthesizers are shown in Figure 2.
Figure 1. Synthesizer Locations in the K3.
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