On 11/24/2023 10:59 AM, Scott Townley wrote:
How do I separate the wheat from the chaff? I have a fully equipped
bench...I would think the go-to would be a TDR measurement. Any
better/additional suggestions?
Look at them carefully. If they aren't labeled Amphenol or stamped with
MIL-spec numbers, they're junk. It's all about mechanical construction.
Measurements won't show it.
I've bought surplus MIL-spec adapters at ham flea-markets. Amphenol
parts are sold by legacy electronics vendors like Allied, Newark, Arrow,
etc. There are a few ham vendors who sell them, but many also sell junk
connectors. The real thing is 2-3x more expensive. Here's one quality
vendor that sells both the real thing and the junk. They don't offer
quantity discounts, while the traditional electronics vendors do.
https://www.rfparts.com/sitemap
We sometimes need to study the Amphenol parts listing to know which
connector to buy. For example, they manufacture the solder-type PL259
with at least 4 different part numbers, all of which start with 83-1SP.
The one we want is the one with no suffix, because the body is silver
plated, and thus easier to solder to.
73, Jim K9YC
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