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AeroElectric-List: Re: AeroElectric-List: Using a BNC “Tâ€

 
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rv8iator



Joined: 11 Apr 2006
Posts: 143
Location: Newberg, OR

PostPosted: Thu Nov 07, 2019 5:42 am    Post subject: AeroElectric-List: Re: AeroElectric-List: Using a BNC “T†Reply with quote

Bob has a cartoon assembly guide to rolling your own... very simple all in a small project box.

-chris
On Thu, Nov 7, 2019 at 5:26 AM Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)> wrote:

Quote:
--> AeroElectric-List message posted by: Kelly McMullen <kellym(at)aviating.com (kellym(at)aviating.com)>

I am not aware of any suitable switch. Icom used to offer, (and King
before them) a small box that made the switch when antenna cable for
handheld was plugged in. Not elegant, but mostly worked.
If you terminate the cable in location easily reached, it may be better
to simply disconnect cable from one radio and connect it to the other.
Kelly

On 11/7/2019 6:04 AM, Carlos Trigo wrote:
> Thank you Eric
>
> Is there any automatic coaxial switch?
> Can you please point me out to a suitable coaxial switch (eBay, Amazon,
> mouser, ...).
>
> Cheers
> Carlos
>
>
> Enviado do meu iPhone
>
>> No dia 07/11/2019, às 05:20, Eric Page <edpav8r(at)yahoo.com (edpav8r(at)yahoo.com)> escreveu:
>>
>> 
>> On Nov 6, 2019, at 4:23 PM, Carlos Trigo <trigo(at)mail.telepac.pt (trigo(at)mail.telepac.pt)
>> <mailto:trigo(at)mail.telepac.pt (trigo(at)mail.telepac.pt)>> wrote:
>>
>>> I have just installed a 2nd Comm antenna in my aircraft...
>>
>>
>> Carlos, the short answer is no.  The extra length of open-ended coax
>> will ruin the impedance match between either radio and the antenna,
>> and transmitting on one radio with the other connected through the tee
>> might well result in (expensive) tears.
>>
>> This situation calls for either:
>>
>> 1) A coaxial switch that connects the antenna to only a single radio
>> at a time and disconnects the other; or,
>>
>> 2) Delete the tee and leave both lengths of coax in place.  Connect
>> the antenna to the coax feeding your handheld for now.  When you later
>> install the Comm 2 radio, connect that coax at the antenna and remove
>> or abandon the one to the handheld.
>>
>> Eric
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