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[K3] Relay click - SOLVED.....

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Ray Albers-2

[K3] Relay click - SOLVED.....

….thanks to comments and suggestions from K9ZTV and W2CS.

My K3 has the Sub Receiver installed, and I have been playing around with
diversity reception, using a random wire connected to the sub-receiver
antenna input BNC connector. Apparently the carrier operated relay that
protects the receiver from overload is being triggered by lots of RF coming
into that random wire. When I disconnect the receive antenna, no more
clicking. Now that I know what it is, I'll just ignore it. Or maybe someday
I'll rig a manual T-R switch arrangement to disconnect the sub receiver
antenna except when actually using it.

Thanks, gents!

73
Ray K2HYD
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john@kk9a.com

Re: [K3] Relay click - SOLVED.....

Why not reduced the RF to a safe level on the RX line? I would try
something like this https://www.dxengineering.com/parts/dxe-rg5000hd
and move the wire further away if possible to ensure that you do not
damage the receiver.

John KK9A - W4AAA

Ray Albers K2HYD wrote:

….thanks to comments and suggestions from K9ZTV and W2CS.

My K3 has the Sub Receiver installed, and I have been playing around with
diversity reception, using a random wire connected to the sub-receiver
antenna input BNC connector. Apparently the carrier operated relay that
protects the receiver from overload is being triggered by lots of RF coming
into that random wire. When I disconnect the receive antenna, no more
clicking. Now that I know what it is, I'll just ignore it. Or maybe someday
I'll rig a manual T-R switch arrangement to disconnect the sub receiver
antenna except when actually using it.

Thanks, gents!

73
Ray K2HYD

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David Olean

Re: [K3] Relay click - SOLVED.....

In reply to this post by Ray Albers-2

Hello Ray

I built an RF limiter to put in my 2nd receiver line. It consists of two
toroids and a pair of 1N914 or other fast diodes. Basically you step up
the impedance to a pair of diodes and then step it back down to 50
ohms. Mine limits nicely at about 0 dBm or so. You can buy similar
stuff at DXE I think.

Dave K1WHS

On 11/7/2019 2:30 PM, Ray Albers wrote:

> ….thanks to comments and suggestions from K9ZTV and W2CS.
>
> My K3 has the Sub Receiver installed, and I have been playing around with
> diversity reception, using a random wire connected to the sub-receiver
> antenna input BNC connector. Apparently the carrier operated relay that
> protects the receiver from overload is being triggered by lots of RF coming
> into that random wire. When I disconnect the receive antenna, no more
> clicking. Now that I know what it is, I'll just ignore it. Or maybe someday
> I'll rig a manual T-R switch arrangement to disconnect the sub receiver
> antenna except when actually using it.
>
> Thanks, gents!
>
> 73
> Ray K2HYD
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

N4ZR

Adding PTT Out Switching to a K3

In reply to this post by Ray Albers-2

I need to be able to disconnect the antenna to my SDRs when
transmitting. This used to be easy but now my PTT Out jack is committed
to the KPA-1500. I'm looking for suggestions of how best to accomplish
this - I don't believe sequencing is required, just a second PTT output.

Ideas?

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 9:30 AM, Ray Albers wrote:

donovanf

Re: Adding PTT Out Switching to a K3

Hi Pete,

If the open circuit (unkeyed) voltage is the same polarity for both devices,
you can connect a diode in series with each keying line. Then connect
both diodes to the KEY OUT (not PTT !) jack.

The voltages do not need to be identical , just the polarity

73
Frank
W3LPL

----- Original Message -----

From: "N4ZR" <[hidden email]>
To: [hidden email]
Sent: Thursday, November 7, 2019 4:44:41 PM
Subject: [Elecraft] Adding PTT Out Switching to a K3

I need to be able to disconnect the antenna to my SDRs when
transmitting. This used to be easy but now my PTT Out jack is committed
to the KPA-1500. I'm looking for suggestions of how best to accomplish
this - I don't believe sequencing is required, just a second PTT output.

Ideas?

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 9:30 AM, Ray Albers wrote:

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Bob McGraw - K4TAX

Re: Adding PTT Out Switching to a K3

In reply to this post by N4ZR

Connect the KPA-1500 via the ACC cable and thus free up the PTT
output. The system is very smart and works exceptionally well. I
use this method with my KPA500 and KAT500.

The PTT Out is connected to the VHF transverter.

73

Bob, K4TAX

On 11/7/2019 10:44 AM, N4ZR wrote:

> I need to be able to disconnect the antenna to my SDRs when
> transmitting. This used to be easy but now my PTT Out jack is
> committed to the KPA-1500. I'm looking for suggestions of how best to
> accomplish this - I don't believe sequencing is required, just a
> second PTT output.
>
> Ideas?
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 11/7/2019 9:30 AM, Ray Albers wrote:
>> ….thanks to comments and suggestions from K9ZTV and W2CS.
>>
>> My K3 has the Sub Receiver installed, and I have been playing around
>> with
>> diversity reception, using a random wire connected to the sub-receiver
>> antenna input BNC connector. Apparently the carrier operated relay that
>> protects the receiver from overload is being triggered by lots of RF
>> coming
>> into that random wire. When I disconnect the receive antenna, no more
>> clicking. Now that I know what it is, I'll just ignore it. Or maybe
>> someday
>> I'll rig a manual T-R switch arrangement to disconnect the sub receiver
>> antenna except when actually using it.
>>
>> Thanks, gents!
>>
>> 73
>> Ray K2HYD
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

markmusick

Re: [K3] Relay click - SOLVED.....

In reply to this post by john@kk9a.com

Ray,
I echo John's advice.
I use the DXE-RG5000 on the inputs to my K9AY Beverage antenna switch.
This protects both the main and sub-receivers.
You do not want to rely on the relay in the K3 high RF input circuit.
It is not intended to be the main protection for the receiver.
If the relay is operating, it is telling you that you need additional protection for the receiver or need to move the receive antenna further away from the transmit antenna.
By the way, K3LR uses the DXE-RG5000HD in his contest station. It is tried and proven.

Mark, WB9CIF

-----Original Message-----
From: [hidden email] <[hidden email]> On Behalf Of [hidden email]
Sent: Thursday, November 7, 2019 16:06
To: [hidden email]
Subject: Re: [Elecraft] [K3] Relay click - SOLVED.....

Why not reduced the RF to a safe level on the RX line? I would try something like this https://www.dxengineering.com/parts/dxe-rg5000hd
and move the wire further away if possible to ensure that you do not damage the receiver.

John KK9A - W4AAA

Ray Albers K2HYD wrote:

….thanks to comments and suggestions from K9ZTV and W2CS.

My K3 has the Sub Receiver installed, and I have been playing around with diversity reception, using a random wire connected to the sub-receiver antenna input BNC connector. Apparently the carrier operated relay that protects the receiver from overload is being triggered by lots of RF coming into that random wire. When I disconnect the receive antenna, no more clicking. Now that I know what it is, I'll just ignore it. Or maybe someday I'll rig a manual T-R switch arrangement to disconnect the sub receiver antenna except when actually using it.

Thanks, gents!

73
Ray K2HYD

______________________________________________________________
Elecraft mailing list
Home: http://mailman.qth.net/mailman/listinfo/elecraft
Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

This list hosted by: http://www.qsl.net
Please help support this email list: http://www.qsl.net/donate.html Message delivered to [hidden email]

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Help: http://mailman.qth.net/mmfaq.htm
Post: mailto:[hidden email]

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wa8wzg

Re: Adding PTT Out Switching to a K3

In reply to this post by Bob McGraw - K4TAX

To All..
while we are on this subject,,
I am looking for a way to to have a separate PTT out for Antenna 2...
I want to be able to control two different amplifiers PTT when switch
from Antenna 1 and Antenna 2..
Any thoughts??
Thanks
Tom
N7GP
ex WA8WZG

On 2019-11-07 09:58, Bob McGraw K4TAX wrote:

> Connect the KPA-1500 via the ACC cable and thus free up the PTT
> output. The system is very smart and works exceptionally well. I
> use this method with my KPA500 and KAT500.
>
> The PTT Out is connected to the VHF transverter.
>
> 73
>
> Bob, K4TAX
>
> On 11/7/2019 10:44 AM, N4ZR wrote:
>> I need to be able to disconnect the antenna to my SDRs when
>> transmitting. This used to be easy but now my PTT Out jack is
>> committed to the KPA-1500. I'm looking for suggestions of how best to
>> accomplish this - I don't believe sequencing is required, just a
>> second PTT output.
>>
>> Ideas?
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 11/7/2019 9:30 AM, Ray Albers wrote:
>>> ….thanks to comments and suggestions from K9ZTV and W2CS.
>>>
>>> My K3 has the Sub Receiver installed, and I have been playing around
>>> with
>>> diversity reception, using a random wire connected to the
>>> sub-receiver
>>> antenna input BNC connector. Apparently the carrier operated relay
>>> that
>>> protects the receiver from overload is being triggered by lots of RF
>>> coming
>>> into that random wire. When I disconnect the receive antenna, no more
>>> clicking. Now that I know what it is, I'll just ignore it. Or maybe
>>> someday
>>> I'll rig a manual T-R switch arrangement to disconnect the sub
>>> receiver
>>> antenna except when actually using it.
>>>
>>> Thanks, gents!
>>>
>>> 73
>>> Ray K2HYD
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

markmusick

Re: [K3] Relay click - SOLVED.....

In reply to this post by john@kk9a.com

Don Wilhelm

Re: Adding PTT Out Switching to a K3

In reply to this post by wa8wzg

Tom,

To the best of my knowledge, there is no external signal from the K3/K3S
to indicate whether ANT1 or ANT2 is active.

If you have any manual switching in place, incorporate it in that switching.

73,
Don W3FPR

On 11/7/2019 12:12 PM, [hidden email] wrote:

> To All..
> while we are on this subject,,
> I am looking for a way to to have a separate PTT out for Antenna 2...
> I want to be able to control two different amplifiers PTT when switch
> from Antenna 1 and Antenna 2..
> Any thoughts??
> Thanks
> Tom
> N7GP
> ex WA8WZG
>
>
>
> On 2019-11-07 09:58, Bob McGraw K4TAX wrote:
>> Connect the KPA-1500 via the ACC cable and thus free up the PTT
>> output. The system is very smart and works exceptionally well. I
>> use this method with my KPA500 and KAT500.
>>
>> The PTT Out is connected to the VHF transverter.
>>
>> 73
>>
>> Bob, K4TAX
>>
>> On 11/7/2019 10:44 AM, N4ZR wrote:
>>> I need to be able to disconnect the antenna to my SDRs when
>>> transmitting. This used to be easy but now my PTT Out jack is
>>> committed to the KPA-1500. I'm looking for suggestions of how best
>>> to accomplish this - I don't believe sequencing is required, just a
>>> second PTT output.
>>>
>>> Ideas?
>>>
>>> 73, Pete N4ZR
>>> Check out the Reverse Beacon Network
>>> at <http://reversebeacon.net>, now
>>> spotting RTTY activity worldwide.
>>> For spots, please use your favorite
>>> "retail" DX cluster.
>>>
>>> On 11/7/2019 9:30 AM, Ray Albers wrote:
>>>> ….thanks to comments and suggestions from K9ZTV and W2CS.
>>>>
>>>> My K3 has the Sub Receiver installed, and I have been playing around
>>>> with
>>>> diversity reception, using a random wire connected to the sub-receiver
>>>> antenna input BNC connector. Apparently the carrier operated relay
>>>> that
>>>> protects the receiver from overload is being triggered by lots of RF
>>>> coming
>>>> into that random wire. When I disconnect the receive antenna, no more
>>>> clicking. Now that I know what it is, I'll just ignore it. Or maybe
>>>> someday
>>>> I'll rig a manual T-R switch arrangement to disconnect the sub receiver
>>>> antenna except when actually using it.
>>>>
>>>> Thanks, gents!
>>>>
>>>> 73
>>>> Ray K2HYD
>>>> ______________________________________________________________
>>>> Elecraft mailing list
>>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>>> Help: http://mailman.qth.net/mmfaq.htm
>>>> Post: mailto:[hidden email]
>>>>
>>>> This list hosted by: http://www.qsl.net
>>>> Please help support this email list: http://www.qsl.net/donate.html
>>>> Message delivered to [hidden email]
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

N4ZR

Re: Adding PTT Out Switching to a K3

In reply to this post by Bob McGraw - K4TAX

Well I'll be darned. I just pulled that cable out of the K3 and it is
indeed redundant. I must have missed that in the manual. Thanks, Bob.

While I'm on the subject, I wish that Elecraft would clean up their
terminology - their use of "Key" to denote PTT is confusing. See the
back panel of the K3, for example, which has PTT IN and KEY OUT jacks in
the same row. I believe this usage originated with CB.

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 11:58 AM, Bob McGraw K4TAX wrote:

> Connect the KPA-1500 via the ACC cable and thus free up the PTT
> output. The system is very smart and works exceptionally well. I use
> this method with my KPA500 and KAT500.
>
> The PTT Out is connected to the VHF transverter.
>
> 73
>
> Bob, K4TAX
>
> On 11/7/2019 10:44 AM, N4ZR wrote:
>> I need to be able to disconnect the antenna to my SDRs when
>> transmitting. This used to be easy but now my PTT Out jack is
>> committed to the KPA-1500. I'm looking for suggestions of how best
>> to accomplish this - I don't believe sequencing is required, just a
>> second PTT output.
>>
>> Ideas?
>>
>> 73, Pete N4ZR
>> Check out the Reverse Beacon Network
>> at <http://reversebeacon.net>, now
>> spotting RTTY activity worldwide.
>> For spots, please use your favorite
>> "retail" DX cluster.
>>
>> On 11/7/2019 9:30 AM, Ray Albers wrote:
>>> ….thanks to comments and suggestions from K9ZTV and W2CS.
>>>
>>> My K3 has the Sub Receiver installed, and I have been playing around
>>> with
>>> diversity reception, using a random wire connected to the sub-receiver
>>> antenna input BNC connector. Apparently the carrier operated relay
>>> that
>>> protects the receiver from overload is being triggered by lots of RF
>>> coming
>>> into that random wire. When I disconnect the receive antenna, no more
>>> clicking. Now that I know what it is, I'll just ignore it. Or maybe
>>> someday
>>> I'll rig a manual T-R switch arrangement to disconnect the sub receiver
>>> antenna except when actually using it.
>>>
>>> Thanks, gents!
>>>
>>> 73
>>> Ray K2HYD
>>> ______________________________________________________________
>>> Elecraft mailing list
>>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>>> Help: http://mailman.qth.net/mmfaq.htm
>>> Post: mailto:[hidden email]
>>>
>>> This list hosted by: http://www.qsl.net
>>> Please help support this email list: http://www.qsl.net/donate.html
>>> Message delivered to [hidden email]
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:[hidden email]
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to [hidden email]
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

N4ZR

Re: [K3] Relay click - SOLVED.....

In reply to this post by john@kk9a.com

Thanks, John - Aside from the price of the DXE unit, I do have a
proximity problem - my RX antennas are less that 100 feet from my
transmitting antennas.

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 11:05 AM, [hidden email] wrote:

> Why not reduced the RF to a safe level on the RX line? I would try
> something like this https://www.dxengineering.com/parts/dxe-rg5000hd
> and move the wire further away if possible to ensure that you do not
> damage the receiver.
>
> John KK9A - W4AAA
>
>
>
> Ray Albers K2HYD wrote:
>
> ….thanks to comments and suggestions from K9ZTV and W2CS.
>
> My K3 has the Sub Receiver installed, and I have been playing around with
> diversity reception, using a random wire connected to the sub-receiver
> antenna input BNC connector. Apparently the carrier operated relay that
> protects the receiver from overload is being triggered by lots of RF
> coming
> into that random wire. When I disconnect the receive antenna, no more
> clicking. Now that I know what it is, I'll just ignore it. Or maybe
> someday
> I'll rig a manual T-R switch arrangement to disconnect the sub receiver
> antenna except when actually using it.
>
> Thanks, gents!
>
> 73
> Ray K2HYD
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to [hidden email]

N4ZR

Re: Adding PTT Out Switching to a K3

In reply to this post by donovanf

Thanks, Frank - I knew there was some way to do it, just didn't know what.

73, Pete N4ZR
Check out the Reverse Beacon Network
at <http://reversebeacon.net>, now
spotting RTTY activity worldwide.
For spots, please use your favorite
"retail" DX cluster.

On 11/7/2019 11:53 AM, [hidden email] wrote:

> Hi Pete,
>
> If the open circuit (unkeyed) voltage*/is the same polarity/* for both
> devices,
> you can connect a diode in series with each keying line. Then connect
> both diodes to the KEY OUT (not PTT !) jack.
>
> The voltages */do not need to be identical/*, just the polarity
>
> 73
> Frank
> W3LPL
>
>
>
> ------------------------------------------------------------------------
> *From: *"N4ZR" <[hidden email]>
> *To: *[hidden email]
> *Sent: *Thursday, November 7, 2019 4:44:41 PM
> *Subject: *[Elecraft] Adding PTT Out Switching to a K3
>
> I need to be able to disconnect the antenna to my SDRs when
> transmitting. This used to be easy but now my PTT Out jack is committed
> to the KPA-1500. I'm looking for suggestions of how best to accomplish
> this - I don't believe sequencing is required, just a second PTT output.
>
> Ideas?
>
> 73, Pete N4ZR
> Check out the Reverse Beacon Network
> at <http://reversebeacon.net>, now
> spotting RTTY activity worldwide.
> For spots, please use your favorite
> "retail" DX cluster.
>
> On 11/7/2019 9:30 AM, Ray Albers wrote:
> > ….thanks to comments and suggestions from K9ZTV and W2CS.
> >
> > My K3 has the Sub Receiver installed, and I have been playing around
> with
> > diversity reception, using a random wire connected to the sub-receiver
> > antenna input BNC connector. Apparently the carrier operated relay that
> > protects the receiver from overload is being triggered by lots of RF
> coming
> > into that random wire. When I disconnect the receive antenna, no more
> > clicking. Now that I know what it is, I'll just ignore it. Or maybe
> someday
> > I'll rig a manual T-R switch arrangement to disconnect the sub receiver
> > antenna except when actually using it.
> >
> > Thanks, gents!
> >
> > 73
> > Ray K2HYD
> > ______________________________________________________________
> > Elecraft mailing list
> > Home: http://mailman.qth.net/mailman/listinfo/elecraft
> > Help: http://mailman.qth.net/mmfaq.htm
> > Post: mailto:[hidden email]
> >
> > This list hosted by: http://www.qsl.net
> > Please help support this email list: http://www.qsl.net/donate.html
> > Message delivered to [hidden email]
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
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Don Wilhelm

Re: Adding PTT Out Switching to a K3

In reply to this post by N4ZR

Pete,

To my mind, the PTT and KEY OUT nomenclature used by Elecraft is
entirely correct and completely descriptive of what each does. Yes, I
know that some other rigs use PTT and KEYOUT interchangably, Icom
confuses my mind more by labeling the KEYOUT with SEND.

PTT is what you do to put the transceiver into transmit - Push To Talk.
That may be like activating the PTT button on the microphone (I shudder
when a ham talks about "keying the mic" - to me that is CB talk) or it
can be from an external device such as a footswitch.

KEY OUT is just what it says: It is an output signal that is to be used
to key other devices (such as an amplifier) when the transceiver is in
transmit.

73,
Don W3FPR

On 11/7/2019 3:14 PM, N4ZR wrote:
> Well I'll be darned. I just pulled that cable out of the K3 and it is
> indeed redundant. I must have missed that in the manual. Thanks, Bob.
>
> While I'm on the subject, I wish that Elecraft would clean up their
> terminology - their use of "Key" to denote PTT is confusing. See the
> back panel of the K3, for example, which has PTT IN and KEY OUT jacks in
> the same row. I believe this usage originated with CB.
>
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