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BNC connector doesn't work.

GLENN THOMPSON All Messages By This Member #118510 I ordered a OCX-mini 20 meter and had it built by QRP as I don't solder. Finally tried to connect coax and the connector will not close all the way. Same problem with a dummy load. So the unit is useless, see attached jpg to see the problem, notice the part I have circled in blue. I've seen another ops ocx-mini and the bnc connector doesn't look like the one on my unit.
mike/w1mt All Messages By This Member #118511 Remove the washer. Of all the QCX's I've built I've had to leave that washer off on all of them. -mike/w1mt toggle quoted message Show quoted text On Fri, Feb 23, 2024 at 6:47?PM GLENN THOMPSON <glenn.thompson@...> wrote: I ordered a OCX-mini 20 meter and had it built by QRP as I don't solder. Finally tried to connect coax and the connector will not close all the way. Same problem with a dummy load. So the unit is useless, see attached jpg to see the problem, notice the part I have circled in blue. I've seen another ops ocx-mini and the bnc connector doesn't look like the one on my unit.
Sandy All Messages By This Member #118514 开云体育 Same experience here - leave the nut, but the lock washer prevents any BNC from fully seating. This has been true for 6 out of 6 rigs built by me. Sandy KB3EOF On 2/23/24 18:52, mike/w1mt wrote: toggle quoted message Show quoted text Remove the washer. Of all the QCX's I've built I've had to leave that washer off on all of them. -mike/w1mt On Fri, Feb 23, 2024 at 6:47?PM GLENN THOMPSON <glenn.thompson@...> wrote: I ordered a OCX-mini 20 meter and had it built by QRP as I don't solder. Finally tried to connect coax and the connector will not close all the way. Same problem with a dummy load. So the unit is useless, see attached jpg to see the problem, notice the part I have circled in blue. I've seen another ops ocx-mini and the bnc connector doesn't look like the one on my unit.
ajparent1/kb1gmx All Messages By This Member #118515 One possible problem is the cable has 75ohm connectors...? BNC connectors for the different impedance due to dimensions of the plastic insert and the pin.? Both parts must match. That and come cheap prefab cables are just crap. -- Allison ------------------ Post online only,? direct email will go to a bit bucket.
GLENN THOMPSON All Messages By This Member #118520 Took lock washer off and connector works as it should. Thanks for the help. 73, glenn/ac0m
GLENN THOMPSON All Messages By This Member #118521 Took lock washer off and connector works as it should. Thanks for the help. 73, glenn/ac0m
Ronan Cantwell All Messages By This Member #118526 On Fri, Feb 23, 2024 at 11:52 PM, mike/w1mt wrote: Remove the washer. Of all the QCX's I've built I've had to leave that washer off on all of them. That's odd. On all three of my QCX minis, the BNC connector is fine, even with the lock washer in place. I wonder if the part has been changed. Cheers,. Ronan MM0IVR?
Bruce Akhurst All Messages By This Member #118530 FYI Allison most recent production of BNC's are mechanically compatible.? Makers could get a long way towards 75 ohms with different insulation materials? and adjusted internal dimensions at the solder /crimp end so the volume production is indistinguishable by fit. ? Of course the two impedances still exist and old cables are still around with different part? numbers for the two types (except on ebay ?) ? The OP's problem was a dimensional issue on the threaded part.

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