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Re: SO-239 standards for HF Band-pass filter work?


 

It's interesting how the focus or center of discussions drifts. This started about testing filters with UHF connectors, so obviously they would have to be used in this case.. The discussion of N connectors has happened often, and in fact I'd read some time ago that, as well as 'inertia', one strong reason for using UHF connectors on ham gear was power handling. Someone in that discussion said that N connectors wouldn't handle ( or maybe just wouldn't be reliable) for high-power ham rigs. The main reason given was the small center pin of the N connector. (I suppose if that's the case, BNC's might have the same problem.)

It would be good to know how much improvement was gained by the folks who have changed their HF station connectors from UHF to the N series, both in transmitting and in reception measurements.

Somewhat related to this (but not the NanoVNA) has anyone researched the development of the UHF (SO-239/PL-259) series and what it's original purpose might have been?

Doug, K8RFT

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