2 Meter Hybrid Ring to BPBR Duplexer conversion

This documents my adventure in converting a noisy Sinclair Hybrid Ring VHF Duplexer to a more reliable BPBR type. The modifications are primarily to add a series capacitor to the coupling loops and change the cabling harness.
While I had it in my garage, I also did a tear down of the cavity resonators and cleaned the sliding resonator rods and contact fingers.

[@loueckert4970]

Good job and tnx for posting your work. 73 de KT1R Lou ex-HP/Agilent/Keysight tech support engineer specializing in network analyzers.

[@st.alexiev625]

Great job! Thank you for sharing.

[@dylanschulz2404]

Nice work!

[@robbehr8806]

I've got two of those! Thanks!

[@brianattaway2474]

Wow. What a great job on a demanding and intricate project.

[@tapaschakraborty3961]

Ok Nice de VU2TKC KOLKATA INDIA

[@rubidiotesla4458]

Is your explanation very good?