Hello,
I checked the loops on my 4062 cavities to verify the range of the duplexer.
The HIGH pass cavities used loop "005", LOW pass used loop "004"
Am I correct to assume this duplexer is a "B" range? (Factory set to 149.825) Sure hope the duplexer will be usable at 146.xxxx mHz!
One more question. I lost one of the Phillip's head stainless screws that hold the loop box to the can. What size are they? Are they metric?
Thank you,
Tim
AE7TH
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On 04/18/2025 11:19 AM PDT Jeff DePolo WN3A via groups.io <jd0@...> wrote:
It's just a matter of retuning.
There is no difference between the 2 sides except how you have it tuned.
Wrong. The loops are different between high-pass and low-pass. And, the loops are different depending on bandsplit.
If you don't have the right loops, or are using the loops for the wrong response (high-pass versus low-pass) you probably won't even make rated space for notch depth. If they are correct for the bandsplit and pass response you'll get 85 dB for a 4-cavity DB4060.
--- Jeff WN3A
