KC9LQV
Member
Does anyone make a 2 hole, diamond shaped BNC mount that would be suitable for replacing the UHF connector on the back of an Icom 2720H? I'm sure not having any luck finding one.
2 hole BNC chassis mount
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You probably won't find one to fit that shape and size. The BNC is quite a bit smaller diameter than the UHF. I can't even find an N connector with that type of chassis mount, and that's roughly the same diameter as the UHF.
Your best bet would probably be to remove the UHF connector from the radio, bring it to a metal shop and have them fabricate you a blank using the old one as a template. Same size and shape and same mounting holes, then have them drill a nice hole in the center, and buy yourself a good bulkhead mount female connector. I would personally go with an N over a BNC, but either one would be better than the UHF, that's for sure.
RF Industries RFN-1022-1 N Female Bulkhead | TESSCO
Amphenol RF 31-2221 BNC Female Bulkhead | TESSCO
Your best bet would probably be to remove the UHF connector from the radio, bring it to a metal shop and have them fabricate you a blank using the old one as a template. Same size and shape and same mounting holes, then have them drill a nice hole in the center, and buy yourself a good bulkhead mount female connector. I would personally go with an N over a BNC, but either one would be better than the UHF, that's for sure.
RF Industries RFN-1022-1 N Female Bulkhead | TESSCO
Amphenol RF 31-2221 BNC Female Bulkhead | TESSCO
This chassis mount N should fit your UHF mount: N Female 2 Hole Panel Mount - Connectors N - Coax Connectors and Adapters - Fleeman, Anderson & Bird, Corp.
For the BNC 2 hole mount, you may be able to trim down a 4 hole to fit. I don't have one handy to verify this, however.
BNC-Female 4-Hole Panel Mount Coaxial Connector (01860) - TestParts
73s
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kb0nly
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As bsdam posted that N connector would work, they are called a two hole, or two hole flange, i have seen them all over ebay.
I haven't seen a BNC version, but i think it would be easy to take a piece of aluminum plate and cut out the shape needed, drill a hole in the center, and install a chassis mount BNC as mentioned above.
Take the old connector off, take a piece of paper and a pencil, lay paper over opening and make a rubbing with the pencil so you have a template to cut out and lay on a piece of aluminum. You can get sheet stock aluminum of the 1/8"-3/16" thickness at many home repair stores. I buy mine at Lowe's. Easy to make an adapter plate that way.
I haven't seen a BNC version, but i think it would be easy to take a piece of aluminum plate and cut out the shape needed, drill a hole in the center, and install a chassis mount BNC as mentioned above.
Take the old connector off, take a piece of paper and a pencil, lay paper over opening and make a rubbing with the pencil so you have a template to cut out and lay on a piece of aluminum. You can get sheet stock aluminum of the 1/8"-3/16" thickness at many home repair stores. I buy mine at Lowe's. Easy to make an adapter plate that way.
K
kb0nly
Guest
Oops i see bsdam also linked to a four hole BNC, was just going to post that too.. You could get one and cut/grind off two sides.
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KC9LQV
Member
Thanks for all the replies. Building an adapter plate isn't a bad idea, and that hadn't occurred to me. Of course, I thought I'd just be able to get a BNC mount "off the shelf".
Using an N mount hadn't occurred to me either, but for simplicity's sake I may go with the one linked above. I had hoped to standardize all my mobile gear on one connector style, and BNC seemed like the ideal choice.
The reason I'm asking is that I plan on using a 2720 exclusively for 800/900 mhz work ... and I'm wondering if switching to a better connector would provide enough improvement to justify the effort.
I had thought I'd just be able to buy a replacement and slap it in there ... but if I have to resort to custom fabrication, I want to be sure it's worth it.
Using an N mount hadn't occurred to me either, but for simplicity's sake I may go with the one linked above. I had hoped to standardize all my mobile gear on one connector style, and BNC seemed like the ideal choice.
The reason I'm asking is that I plan on using a 2720 exclusively for 800/900 mhz work ... and I'm wondering if switching to a better connector would provide enough improvement to justify the effort.
I had thought I'd just be able to buy a replacement and slap it in there ... but if I have to resort to custom fabrication, I want to be sure it's worth it.
UHF connectors were never meant to go beyond 300 MHz. Of course some would argue that Motorola and other manufacturers have used them for decades even on 800 MHz radios and they work just fine. Regardless of that fact, changing them out to something that was actually designed to operated >300 MHz and offers a better, more reliable connection is certainly not a negative. I would personally go with the N connector for this type of application, it's a superior connector to BNC and is about the best you're going to get for LMR applications. Since these are mobile radios that won't require constant connecting/disconnecting of the connectors, best to stick with a threaded connection for maximum reliability.
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