Peter,
Another option might be for you to try the Array Solutions product: AS-FEP.
This is a small device that is placed between the receive antenna and the rig.
It protects the radio’s front end by electronically switching (and very fast)
the receive antenna out if it senses too much RF coming in on it. I got one a
few weeks ago and it works quite well. I have a ground-mounted multi-band
vertical that I use as my receive antenna. My transmit antenna is an all-band
wire doublet that is no more than 30 feet from the tip of that vertical. When
running my KPA500 at 525+ watts on CW, at 25 WPM, it works perfectly. I no
longer hear the K3’s COR’s clicking when I transmit. And it is so fast that I
can’t tell it is in the line - the other signals in the receiver’s pass band
are still audible between characters. The only thing you need to be cautious of
is to never, never transmit through it, as that will release the smoke in it’s
internal components!
I believe there are other devices similar to this on the market, but the AS-FEP
is highly rated and is only $55USD. I gave it a try and have been very, very
happy with it.
73, Jim / W6JHB
> On Sunday, May 24, 2015, at Sunday, 6:22 AM, Mike K2MK
> wrote:
>
> Hi Peter,
>
> You probably will need the protection on the K3 AUX RF input. There is some
> minimal built in protection in the form of carrier operated relays (COR).
> You'll see them in the block diagrams at the end of the K3 user manual. But
> if you hear the relays clicking while transmitting it's suggested that the
> internal protection might not be sufficient. If you are already using the
> key out connection on the back of the K3 for an amplifier you can use the
> auxiliary key out connection in the 15 pin accessory socket. It is a low
> current output so you might require an additional driver transistor if your
> current protection device draws high current. Specs are contained in the
> user manual.
>
> The K3 remembers settings such as ANT1 and ANT2 on a per band basis. So yes,
> you can have an HF antenna on ANT1 and a 6 meter antenna on ANT2 and not
> have to worry about pressing any additional buttons when you change bands.
>
> 73,
> Mike K2MK
>
>
>
> Peter W2IRT wrote
>> Hello all,
>> Waiting on my K3s, which will be my first-ever Elecraft product. I'm going
>> through as much documentation as I can but I have a couple of questions at
>> the moment that I'm not seeing any reference to online. I have ordered the
>> ATU module and a the second receiver.
>>
>> First off, I'm transitioning from a Yaesu Mark V, and I have a K9AY
>> receive
>> loop that's connected to the radio's auxiliary antenna port. The Mark-V
>> requires a relay cutoff to protect the front end from the aux-in line when
>> transmitting, which obviously I have installed. Will I need to use this on
>> the K3S, and if so, how does it interface? Or is there built-in protection
>> within the K3S, so that when I'm transmitting at 1500W I won't risk damage
>> to the front end from the receive antenna?
>>
>> Second, I have one coax coming in for my HF antennas (and ancillary
>> station
>> equipment), and a second direct coax for my 6m Yagi on a different tower.
>> Is
>> it possible to place the 6m Yagi on ANT-2 and HF system coax on ANT-1, and
>> have the radio switch automatically when I invoke 6m?
>>
>> -
>> 73 and Good DX
>> Peter, W2IRT
>
>
>
>
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/New-user-two-antenna-questions-tp7603433p7603481.html
> Sent from the Elecraft mailing list archive at Nabble.com.
> __
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft@mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w6...@me.com
__
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:Elecraft@mailman.qth.net
This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html
Message delivered to arch...@mail-archive.com
