Say I have a pile of coax adapters on my bench (we all do, right?). 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. A
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-spe
Unfortunately, if I search "Manufacturers" on the DigiKey site, there are dozens of listings that start with the word "Amphenol" followed by the name of some non-Amphenol entity that has been acquire
AARGH! Thanks, Rick. Sorry, I can't help with that. 73, Jim K9YC On 11/24/2023 1:30 PM, Richard (Rick) Karlquist wrote: Unfortunately, if I search "Manufacturers" on the DigiKey site, there are dozen
Author: Jack Brindle via TowerTalk <towertalk@contesting.com>
Date: Fri, 24 Nov 2023 16:21:52 -0600
If you go to DigiKey and look up 83-1SP it shows only one manufacturer - Amphenol RF. That is the genuine part, with a Q1 price of $7.45, but it drops quickly in quantity. I would probably look for a
Author: Jack Brindle via TowerTalk <towertalk@contesting.com>
Date: Fri, 24 Nov 2023 16:29:39 -0600
One of the big problems with off-brand connectors and adapters is their power handling capabilities. This is especially noted in the right-angle adapter. We see a lot of arcing when higher power is a
Yes. The cheapies have a center conductor that's a tiny spring! 73, Jim K9YC _______________________________________________ _______________________________________________ TowerTalk mailing list Tow
Only use Anaphonal 90 deg UHF adaptors Wayne ,W3EA Sent from Mail<https://go.microsoft.com/fwlink/?LinkId=550986> for Windows 10 Yes. The cheapies have a center conductor that's a tiny spring! 73, Ji
FWIW, here is a comparison of two UHF bullet adapters (F-F). Both are sold by "Amphenol-RF": https://www.mouser.com/ProductDetail/Amphenol-RF/182109?qs=pUp6IBEmRweq5dreR9OqEw%3D%3D https://www.mouser
Two failings of off-brand UHF connectors is the machining of the threaded surfaces and the female center pin cup. Off brands don't have the thread precision that Amphenol has. There's a risk that the
Yes, and no. One interesting thing as CNC made it into small companies over the last couple of decades (with insert tooling), the quality of machining has gone up. The days of hand ground HSS tooling
If that's the case, then wouldn't an insertion loss test reveal such an issue? For example, I was deconstructing the power handling of a Charter Engineering B5-series coaxial relay (N-female connecto
We've been talking inferior UHF connectors here (especially angle ones) and it doesn't require voltage breakdown ... current alone can do it. Assuming a KW on a 50 ohm line, a resistance of 0.1 ohm w
Author: Jack Brindle via TowerTalk <towertalk@contesting.com>
Date: Sat, 25 Nov 2023 13:56:48 -0600
The problem isnt so much resistive buildup, but rather arcing and flash-over. The reason the right angle connectors are such a problem is that the center conductor can either move or is bot well-plac
Amphenol connectors are Banned at my station. They are Not what they used to be... 100% of all Up the tower jumpers are DXE RG213 and DXE Crimp ons. Ron, WV4P ________________________________________
I ran into a different failure mode on a right angle UHF M-F adapter. Several years back, while at Visalia, I found some new, very nice-looking, nicely-machined, apparently-well-built, adapters from
You misunderstand what the definition of "insertion loss" (IL) is, as used by RF component vendors. IL = incident power (input) - transferred power (output). The device under test (DUT) has both "mis
I stand corrected; yes I neglected mismatch loss. Re-calculating using datasheet max values gives Pdiss values that decrease with increasing frequency, which is what I would have expected (but didn't
I wonder what issues that you have had with Amphenol connectors and with which style? My station uses various styles, N, UHF and 7-16DIN (plus BNC on RX cables). I only purchase Amphenol or Andrew/Co
Author: amfone via TowerTalk <towertalk@contesting.com>
Date: Sun, 26 Nov 2023 23:23:16 +0000 (UTC)
I purchased two 125 foot long lengths of DXE RG8X, direct burial coax, this was two perhaps three years ago. The coax lays on the lawn, I pick it up to cut the grass, so I disconnect the cable weekly