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Author Topic: Icom IC-2410H Question  (Read 137 times)

VE7GMX

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Icom IC-2410H Question
« on: March 25, 2022, 11:28:37 AM »

Hello All .

I just acquired a Icom 2410H and although I'm not really a VHF guy ( yet ) , this radio , having the standard SO239 on the back , also has a BNC connector on it .  The manual and all pictures of the back I've seen on the web , say nothing about the BNC connector .  Anyone know what that's for ?  Maybe its so obvious and it just another way to connect an antenna up , but my Spidey senses say that's not likely it . 
Any leads are as usual , muchly appreciated.

73

Jeff
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K6CPO

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Re: Icom IC-2410H Question
« Reply #1 on: March 25, 2022, 12:45:50 PM »

You don't have a manual?

https://www.icomjapan.com/support/manual/2860/

I downloaded the manual (even though I don't have the radio) and I don't see where there's a BNC connector on it. Seeing how the radio is discontinued, I assume you bought it from a private party. Is it possible that BNC is a modification done by a previous owner?
« Last Edit: March 25, 2022, 12:50:13 PM by K6CPO »
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WA3SKN

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Re: Icom IC-2410H Question
« Reply #2 on: March 25, 2022, 01:38:11 PM »

Have you tried taking an ohmmeter and checking resistance from the tip of the antenna jack and the tip of the BNC?
It might tell something without even opening the case!

-Mike.
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WB8VLC

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Re: Icom IC-2410H Question
« Reply #3 on: March 25, 2022, 04:17:13 PM »

I vaguely remember a mod over 20 years ago where a separate antenna connector was added for 800 MHz public safety receive because the existing so-239 antenna port went thru the Tx LPF and 800 MHz was attenuated, that may be what the BNC is for.
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WB8VLC

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Re: Icom IC-2410H Question
« Reply #4 on: March 25, 2022, 04:23:40 PM »

I found  the mod on my disk.

IC2410 800 MHz mod:

To receive 800 Mhz you need to add a new antenna input to connector J2 on the MAIN-B unit (UHF unit) which is the large circuit
board on the bottom of the radio.

J2 connects to a the B-band board which is a very small daughterboard, that is connected to
the MAIN-B board. The service manual offers no description of this board but it apparently is the 800 MHz front end.

Two parts are needed:
One 5 3/4" grey coax jumper (this is available from ICOM but it doesn't have a part number)
Either:
One OPC223 pigtail with UHF connector
or
One OPC166 pigtail with N connector
Or use a panel mounted back side bnc connector as this owner has done.

The grey coax jumper has a plug on one end that mates with J2 and bare leads on the other.
The pigtail also has two bare leads on one end.

This same end also has a metal flange that's designed to screw onto the back panel of the radio after removing one
of the dummy caps on either side of the existing antenna pigtail.
Without going into too much detail, you must:

Remove the small metal cap nearest the bottom of the radio and next to the existing pigtail.
Remove the metal shield at the back section of the Main-B unit.
Solder the two pieces of coax together, shield to shield, center to center and screw this assembly on to the back panel.
Plug the grey cable into J2 and then reassemble the radio or you could also mount a female bnc connector on the back of the radio chassis and connect up as mentioned above.
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VE7GMX

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Re: Icom IC-2410H Question
« Reply #5 on: March 26, 2022, 07:18:43 AM »

WB8VLC 

Looks like you got it for sure . I guess that's what it is and yes I just got this thing last week so had zero clue .  An added little bonus I suppose .  I'm an HF guy so haven't really played with the VHF/UHF spectrum , I'll have to look around and see what's going on these days on 800 MHz , if anything .  The guy I bought this off of said they were good little radios so looking forward to trying it . 

Thanks to everyone that responded .

73 Jeff
VE7GMX

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WB8VLC

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Re: Icom IC-2410H Question
« Reply #6 on: March 28, 2022, 10:49:40 AM »

There's Nothing going on analog wise on 800 MHz these days and even if there are analog stations still on they will probably be trunking.

But really even these days 99 % of the activity is now in the 700/800 MHz band and it is all trunking phase I or phase II digital so you could probably ignore that antenna port.
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