Re: [Elecraft] K3S RX antenna switching questions

[Ken Roberson via Elecraft]

Also make sure that your rx antenna is not running over ground radials from tx 
antenna73 Ken K5DNL
 

On Tuesday, November 14, 2017, 12:57:10 PM CST, j...@kk9a.com 
 wrote:  
 
 I am surprised that the front end protection would kick on with that much
RX antenna spacing and only 50 watts unless there is another way RF is
getting into the shack. If that is what's happening I concur with W3FPR.
Another option would be a receiver overload protector such as
https://www.dxengineering.com/parts/dxe-rg-5000  .

John KK9A


Don Wilhelm wrote:

I suspect that increasing the TX Delay will *not* fix that problem.
Since at greater than 50 watts, you hear relays clicking indicates that
the K3S COR is being activated.
The solution is to either move your RX antenna further from the TX
antenna or use some device that disconnects or grounds the RX antenna
while transmitting.

73,
Don W3FPR

On 11/13/2017 7:26 PM, Steve Steltzer via Elecraft wrote:
> Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest
point to TX antenna is around 200 ft. Over 50 watts I hear relays
clicking and stations have a hard time breaking in even using QRQ plus.
I assume the RX antenna is not switching fast enough and I'm getting 
milliseconds of high RF into the front end and protection relays are
kicking in???

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[Elecraft] K3S RX antenna switching questions

[j...@kk9a.com]

I am surprised that the front end protection would kick on with that much
RX antenna spacing and only 50 watts unless there is another way RF is
getting into the shack. If that is what's happening I concur with W3FPR.
Another option would be a receiver overload protector such as
https://www.dxengineering.com/parts/dxe-rg-5000  .

John KK9A


Don Wilhelm wrote:

I suspect that increasing the TX Delay will *not* fix that problem.
Since at greater than 50 watts, you hear relays clicking indicates that
the K3S COR is being activated.
The solution is to either move your RX antenna further from the TX
antenna or use some device that disconnects or grounds the RX antenna
while transmitting.

73,
Don W3FPR

On 11/13/2017 7:26 PM, Steve Steltzer via Elecraft wrote:
> Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest
point to TX antenna is around 200 ft. Over 50 watts I hear relays
clicking and stations have a hard time breaking in even using QRQ plus.
I assume the RX antenna is not switching fast enough and I'm getting 
milliseconds of high RF into the front end and protection relays are
kicking in???

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Re: [Elecraft] K3S RX antenna switching questions

[Don Wilhelm]

Steve,

I suspect that increasing the TX Delay will *not* fix that problem.
Since at greater than 50 watts, you hear relays clicking indicates that 
the K3S COR is being activated.
The solution is to either move your RX antenna further from the TX 
antenna or use some device that disconnects or grounds the RX antenna 
while transmitting.


73,
Don W3FPR

On 11/13/2017 7:26 PM, Steve Steltzer via Elecraft wrote:

Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest point to 
TX antenna is around 200 ft. Over 50 watts I hear relays clicking and stations 
have a hard time breaking in even using QRQ plus. I assume the RX antenna is 
not switching fast enough and I'm getting  milliseconds of high RF into the 
front end and protection relays are kicking in???

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[Elecraft] K3S RX antenna switching questions

[Steve Steltzer via Elecraft]

Here's the setup : 3 month old K3S. Full wave 80 mtr RX loop. Closest point to 
TX antenna is around 200 ft. Over 50 watts I hear relays clicking and stations 
have a hard time breaking in even using QRQ plus. I assume the RX antenna is 
not switching fast enough and I'm getting  milliseconds of high RF into the 
front end and protection relays are kicking in??? 
Will increasing TX delay help this? If so, how much can I increase it from the 
factory setting of 008 before the keying gets choppy running 50 to 60 wpm? Are 
there other settings that would affect this? I also run an Acom 2000A from time 
to time, which has pin diode T/R switching and, according to reports, does QSK 
perfectly at those speeds. I don't want to mess that up either.
Thanks,Steve, WF3T

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Re: [Elecraft] K3s & Rx antenna

[RIchard Williams via Elecraft]

Gary,
What I found works very well is to take advantage of the RX ANT IN and OUT BNC 
connectors.    Connect your HI Z (or any other receive antenna - I have both 
the HI Z-8 and  Beverages) to the RX IN BNC connector.  Next find a short piece 
of coax (I happen to have a 2 ft or so piece of RG-400) with BNC connectors on 
both ends and connect one end to the RX ANT OUT, and the other in to the AUG RF 
IN connector.
I have found this set up works well for both receive on either the transmit 
antenna or the RX ANT.  When you switch to Diverse mode, the receive antenna 
will be on the man receiver, and your transmit antenna will be on the sub 
receiver.
Dick, K8ZTT
  From: Gary Smith 
 To: Elecraft@mailman.qth.net 
 Sent: Tuesday, February 9, 2016 3:16 PM
 Subject: [Elecraft] K3s & Rx antenna
   
My order is in Queue for a K3s. 

I currently have a K3 with sub Rx and have a HI-Z Rx antenna I use 
with the K3. Sometimes I like listening with only the Rx antenna, 
sometimes I like listening from the the Tx antenna. When I use 
diversity I want to hear from both the Rx and main antennae.

With the K3, what I have done with the Rx coax is attach it to a T 
connector with one end attached to the BNC connector {27} Aux RF, 
located below ANT 2 and the other leg connected to the RX ANT - IN on 
the KXV3.

Once I upgrade the two KBPF3 and Sub Rx board, I will migrate the Sub 
RX to the K3s

With the K3s, how should I connect the RX antenna to be most 
effective with the K3s & diversity? As I have it now?

Thanks,

Gary
KA1J
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Re: [Elecraft] K3s & Rx antenna

[Joe Subich, W4TV]

Replace the T connector with a hybrid splitter ... connect
one output to the Aux Ant (Sub RX) and the other to the RF
In (Main Rx).  I like to feed the splitter with a RX antenna
switch - each of the RX antennas plus a line from the RX Out
jack.  Ideally one would put a splitter on each RX antenna
and feed separate switches for Main RX and Sub RX but that
begins to get a bit complex (maybe someday with four outputs
to route receive antennas to one of two transceivers ).

You can build your own magic-T splitter from plans at Clifton
Laboratories: 
 



I've used old "broadband" MATV/cable splitters (typically
specified 10 - 1000 MHZ) from the "old days" with no issues
all the way down to 160 although the isolation may not make
full specs that low.

If you need an off the shelf commercial product, look at the KD9SV
unit: http://www.dxengineering.com/parts/svp-sv-rsc (less expensive
than a lot of others).  Or search for a surplus unit on eBay.

73,

  ... Joe, W4TV


On 2/9/2016 5:16 PM, Gary Smith wrote:

My order is in Queue for a K3s.

I currently have a K3 with sub Rx and have a HI-Z Rx antenna I use
with the K3. Sometimes I like listening with only the Rx antenna,
sometimes I like listening from the the Tx antenna. When I use
diversity I want to hear from both the Rx and main antennae.

With the K3, what I have done with the Rx coax is attach it to a T
connector with one end attached to the BNC connector {27} Aux RF,
located below ANT 2 and the other leg connected to the RX ANT - IN on
the KXV3.

Once I upgrade the two KBPF3 and Sub Rx board, I will migrate the Sub
RX to the K3s

With the K3s, how should I connect the RX antenna to be most
effective with the K3s & diversity? As I have it now?

Thanks,

Gary
KA1J
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Re: [Elecraft] K3s & Rx antenna

[Don Wilhelm]

Gary,

You can connect it as you have it now, but you can simplify - just 
connect the RX antenna to the AUX RF BNC connector and then enter BSUB 
and select the AUX antenna input for the subRX.


If you also want the RX antenna to feed the main RX when the RX antenna 
is selected, you will have to connect it as you have it for the K3.

Those sections of the K3S work just the same as on the K3.

73,
Don W3FPR

On 2/9/2016 5:16 PM, Gary Smith wrote:

With the K3s, how should I connect the RX antenna to be most
effective with the K3s & diversity? As I have it now?




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Re: [Elecraft] K3s & Rx antenna

[Jorge Diez - CX6VM]

I am very happy with KD9SV products, very high quality

http://www.dxengineering.com/parts/svp-sv-rsc

73,
Jorge
CX6VM/CW5W

2016-02-09 19:48 GMT-03:00 Mike K2MK :

> Hi Gary,
>
> I don't know if it's right or wrong to do it the way you described. I chose
> to purchase a 2 port splitter from DX Engineering. Their part number is
> DXE-RSC-2. I suppose there are cheaper alternatives.
>
> http://www.dxengineering.com/parts/dxe-rsc-2
>
> 73,
> Mike K2MK
>
>
> Gary Smith-2 wrote
> > My order is in Queue for a K3s.
> >
> > I currently have a K3 with sub Rx and have a HI-Z Rx antenna I use
> > with the K3. Sometimes I like listening with only the Rx antenna,
> > sometimes I like listening from the the Tx antenna. When I use
> > diversity I want to hear from both the Rx and main antennae.
> >
> > With the K3, what I have done with the Rx coax is attach it to a T
> > connector with one end attached to the BNC connector {27} Aux RF,
> > located below ANT 2 and the other leg connected to the RX ANT - IN on
> > the KXV3.
> >
> > Once I upgrade the two KBPF3 and Sub Rx board, I will migrate the Sub
> > RX to the K3s
> >
> > With the K3s, how should I connect the RX antenna to be most
> > effective with the K3s & diversity? As I have it now?
> >
> > Thanks,
> >
> > Gary
> > KA1J
>
>
>
>
>
> --
> View this message in context:
> http://elecraft.365791.n2.nabble.com/K3s-Rx-antenna-tp7613833p7613837.html
> Sent from the Elecraft mailing list archive at Nabble.com.
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>



-- 
73,
Jorge
CX6VM/CW5W
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Re: [Elecraft] K3s & Rx antenna

[Mike K2MK]

Hi Gary,

I don't know if it's right or wrong to do it the way you described. I chose
to purchase a 2 port splitter from DX Engineering. Their part number is
DXE-RSC-2. I suppose there are cheaper alternatives.

http://www.dxengineering.com/parts/dxe-rsc-2

73,
Mike K2MK


Gary Smith-2 wrote
> My order is in Queue for a K3s. 
> 
> I currently have a K3 with sub Rx and have a HI-Z Rx antenna I use 
> with the K3. Sometimes I like listening with only the Rx antenna, 
> sometimes I like listening from the the Tx antenna. When I use 
> diversity I want to hear from both the Rx and main antennae.
> 
> With the K3, what I have done with the Rx coax is attach it to a T 
> connector with one end attached to the BNC connector {27} Aux RF, 
> located below ANT 2 and the other leg connected to the RX ANT - IN on 
> the KXV3.
> 
> Once I upgrade the two KBPF3 and Sub Rx board, I will migrate the Sub 
> RX to the K3s
> 
> With the K3s, how should I connect the RX antenna to be most 
> effective with the K3s & diversity? As I have it now?
> 
> Thanks,
> 
> Gary
> KA1J





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[Elecraft] K3s & Rx antenna

[Gary Smith]

My order is in Queue for a K3s. 

I currently have a K3 with sub Rx and have a HI-Z Rx antenna I use 
with the K3. Sometimes I like listening with only the Rx antenna, 
sometimes I like listening from the the Tx antenna. When I use 
diversity I want to hear from both the Rx and main antennae.

With the K3, what I have done with the Rx coax is attach it to a T 
connector with one end attached to the BNC connector {27} Aux RF, 
located below ANT 2 and the other leg connected to the RX ANT - IN on 
the KXV3.

Once I upgrade the two KBPF3 and Sub Rx board, I will migrate the Sub 
RX to the K3s

With the K3s, how should I connect the RX antenna to be most 
effective with the K3s & diversity? As I have it now?

Thanks,

Gary
KA1J
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