The WACOM WP-641 provides 93 dB of rejection at 1.5dB of insertion loss at 600 kHz - if it's a UHF connector version.? If it's an N connector version the rejection is 91 dB or so (yes it's less).? It's easy to tune with simple equipment.? If the cavity interconnect cables say "Modified RG214" you should consider replacing that cable with real RG214/U.? While the cable supplied is double shielded - it's not silver plated.

The Sinclair Q2330e provides nearly 100dB of rejection at 1.5dB of insertion loss at 600 kHz.? This duplexer is considerably more difficult to tune, requiring a VNA (or RLB) to set the pass frequencies.

You don't state what your receive sensitivity is, or whether or not you're going to use a preamp.? If not - either duplexer is sufficient for the MSR-2000.? If you want more reserve isolation - use the Sinclair.

Kevin W3KKC

On 3/27/2025 6:27 PM, Mike Besemer - WM4B via groups.io wrote: