Today's Message Index:
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0. 05:57 AM - Please Make A Contribution To Support Your Lists (Matt Dralle)
1. 05:06 AM - =?utf-8?Q?Re:__Using_a_BNC_=9CT=9D? (Carlos Trigo)
2. 05:22 AM - =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBVc2luZyBhIEJOQyDigJxU4oCd? (Kelly McMullen)
3. 05:42 AM - =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBSZTogQWVyb0VsZWN0cmljLUxpc3Q6IFVzaW5nIA==?= =?UTF-8?B?YSBCTkMg4oCcVOKAnQ==? (Christopher Cee Stone)
4. 07:06 AM - =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBVc2luZyBhIEJOQyDigJxU4oCd? (Dj Merrill)
5. 07:36 AM - =?Windows-1252?Q?Re:__Re:_AeroElectric-List:_Using_a_BN?= =?Windows-1252?Q?C_=93T=94? (John MacKenzie)
Message 0
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| Subject: | Please Make A Contribution To Support Your Lists |
Dear Listers,
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Message 1
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| Subject: | Re:_AeroElectric-List:_Using_a_BNC_=9CT=9D? |
Thank you Eric
Is there any automatic coaxial switch?
Can you please point me out to a suitable coaxial switch (eBay, Amazon, mous
er, ...).
Cheers
Carlos
Enviado do meu iPhone
> No dia 07/11/2019, =C3-s 05:20, Eric Page <edpav8r@yahoo.com> escreveu:
>
> =EF=BB
>> On Nov 6, 2019, at 4:23 PM, Carlos Trigo <trigo@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 r
uin the impedance match between either radio and the antenna, and transmitti
ng on one radio with the other connected through the tee might well result i
n (expensive) tears.
>
> This situation calls for either:
>
> 1) A coaxial switch that connects the antenna to only a single radio at a t
ime and disconnects the other; or,
>
> 2) Delete the tee and leave both lengths of coax in place. Connect the an
tenna 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 on
e to the handheld.
>
> Eric
Message 2
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| Subject: | =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBVc2luZyBhIEJOQyDigJxU4oCd? |
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, s 05:20, Eric Page <edpav8r@yahoo.com> escreveu:
>>
>>
>> On Nov 6, 2019, at 4:23 PM, Carlos Trigo <trigo@mail.telepac.pt
>> <mailto:trigo@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
Message 3
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| Subject: | =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBSZTogQWVyb0VsZWN0cmljLUxpc3Q6IFVzaW5nIA==?= |
=?UTF-8?B?YSBCTkMg4oCcVOKAnQ==?
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@aviating.com> wrote:
> kellym@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, =C3-s 05:20, Eric Page <edpav8r@yahoo.com> escrev
eu:
> >>
> >> =EF=BB
> >> On Nov 6, 2019, at 4:23 PM, Carlos Trigo <trigo@mail.telepac.pt
> >> <mailto:trigo@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
===========
===========
===========
===========
===========
===========
>
>
Message 4
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| Subject: | =?UTF-8?B?UmU6IEFlcm9FbGVjdHJpYy1MaXN0OiBVc2luZyBhIEJOQyDigJxU4oCd? |
Hi Carlos,
I have a Narco VP-16 antenna switch that I'm not using. Asking $25 +
s/h. It uses an electrical relay to switch between the two radios, so
you could have a toggle switch mounted on the panel to select which
radio is connected to the antenna for example, or possibly get fancy and
figure out a circuit to have it switch when you key the mic on the
second radio.
https://deej.net/forsale/#narco
IMHO it would be better to mount a second antenna on your plane and
have a dedicated antenna for each radio.
-Dj
On 11/7/19 8:04 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
--
Dj Merrill - N1JOV - EAA Chapter 87
Currently Flying: Glastar
Previously: Cessna 150 - Glasair 1 FT - Grumman AA1B
Message 5
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| Subject: | Re: s-1252?Q?Re:_AeroElectric-List:_Re:_AeroElectric-List:_Using_a_BN?= |
=?Windows-1252?Q?C_=93T=94?
Please remove from mailing list
________________________________
From: owner-aeroelectric-list-server@matronics.com <owner-aeroelectric-list
-server@matronics.com> on behalf of Dj Merrill <deej@deej.net>
Sent: Thursday, November 7, 2019 8:04 AM
os Trigo <trigo@mail.telepac.pt>
Subject: AeroElectric-List: Re: AeroElectric-List: Using a BNC =93T=94
Hi Carlos,
I have a Narco VP-16 antenna switch that I'm not using. Asking $25
s/h. It uses an electrical relay to switch between the two radios, so
you could have a toggle switch mounted on the panel to select which
radio is connected to the antenna for example, or possibly get fancy and
figure out a circuit to have it switch when you key the mic on the
second radio.
https://deej.net/forsale/#narco
IMHO it would be better to mount a second antenna on your plane and
have a dedicated antenna for each radio.
-Dj
On 11/7/19 8:04 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
--
Dj Merrill - N1JOV - EAA Chapter 87
Currently Flying: Glastar
Previously: Cessna 150 - Glasair 1 FT - Grumman AA1B
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