[Elecraft] KPA500 STBY to OPER

[Andy Durbin]

"With my K3S, when I switch the KPA500 to Operate, the transceiver is 
automatically reduced to the correct power to drive the amp."

Bob,

I'm curious to know how well that feature works.  Let's say your KPA500 is 
STBY, your K3 is set to 100 W out, and you are transmitting in a digital mode.  
What happens when you switch the KPA500 to OPER?

If you don't know the answer please don't it!

My  controller ensures that the KAT500 key line is inhibited when the KPA500 is 
in STBY.  When the KPA500 goes to OPER I set appropriate exciter power, and 
only when correct power has been verified do I enable the key line.  If I'm 
transmitting at 100W with KPA500 in STBY then selecting OPER gives a brief 
power reduction before establishing high power output.

73,
Andy k3wyc
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Re: [Elecraft] KPA500 STBY to OPER

[Jack Brindle via Elecraft]

Andy;

It works very well. The op has to set the K3 so that the power is controller 
per-band. When the KPA is switched to OPmode, it sends a message to the K3. The 
K3 then switches to the amplifier selection for power, which the op has et 
specifically for the KPA. The converse is also true, switching the KPA to STBY 
also sends a message that causes the K3 to realize the KPA’s state and move 
back to its main power setting for the band.

Note that the power level is set for each band for both normal and KPA drive  
levels. This is well documented in the KPA manual and also in the K3 manual(s).

73!
Jack, W6FB


> On Sep 2, 2019, at 6:58 AM, Andy Durbin  wrote:
> 
> "With my K3S, when I switch the KPA500 to Operate, the transceiver is 
> automatically reduced to the correct power to drive the amp."
> 
> Bob,
> 
> I'm curious to know how well that feature works.  Let's say your KPA500 is 
> STBY, your K3 is set to 100 W out, and you are transmitting in a digital 
> mode.  What happens when you switch the KPA500 to OPER?
> 
> If you don't know the answer please don't it!
> 
> My  controller ensures that the KAT500 key line is inhibited when the KPA500 
> is in STBY.  When the KPA500 goes to OPER I set appropriate exciter power, 
> and only when correct power has been verified do I enable the key line.  If 
> I'm transmitting at 100W with KPA500 in STBY then selecting OPER gives a 
> brief power reduction before establishing high power output.
> 
> 73,
> Andy k3wyc
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Re: [Elecraft] KPA500 STBY to OPER

[Bob McGraw K4TAX]

Andy et al:

With the station configured as shown in the KAT500 manual, page 5 Figure 
1, when operating a digital mode or any mode for that matter, and the 
amp is in STBY the K3S is delivering the power as set by the PWR 
control.    Normally 100 watts.   When the KPA500 is then switched to 
OPER the PWR on the K3S is set to the value as defined in the PWR SET 
menu.    Typically 20 watts drives the KPA500 to 400 to 500 watts 
output.   Thus there are 2 sets of per band power settings, one for 
barefoot operation and one for use with the amp.


As to how well it works, I'd say 100% as I have observed no 
mis-operation or fault indication in the 2 years of using the station on 
a daily basis.


73

Bob, K4TAX

On 9/2/2019 8:58 AM, Andy Durbin wrote:

"With my K3S, when I switch the KPA500 to Operate, the transceiver is automatically 
reduced to the correct power to drive the amp."

Bob,

I'm curious to know how well that feature works.  Let's say your KPA500 is 
STBY, your K3 is set to 100 W out, and you are transmitting in a digital mode.  
What happens when you switch the KPA500 to OPER?

If you don't know the answer please don't it!

My  controller ensures that the KAT500 key line is inhibited when the KPA500 is 
in STBY.  When the KPA500 goes to OPER I set appropriate exciter power, and 
only when correct power has been verified do I enable the key line.  If I'm 
transmitting at 100W with KPA500 in STBY then selecting OPER gives a brief 
power reduction before establishing high power output.

73,
Andy k3wyc


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Re: [Elecraft] WTB: 700Hz Inrad CW Filter

[Petr, OK1RP/M0SIS]

Bill,

they were made on special request order isn't it?





-
73 - Petr, OK1RP 
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
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Re: [Elecraft] It's no KX4 but...

[Petr, OK1RP/M0SIS]

Hi,

it looks like they’re going after the KX3...
If it will be as bad as 7300 then we can stay calm and keep our KX3 in
peace. hi
It is too big for backpacking btw...





-
73 - Petr, OK1RP 
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] It's no KX4 but...

[Petr, OK1RP/M0SIS]

...btw they are talking about 10W output several times but it is giving only
5W output if it is used with internal battery pack BP-272, 10W ouptu is
available only with external 13.8V PSU...:)



-
73 - Petr, OK1RP 
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
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Re: [Elecraft] It's no KX4 but...

[Bob McGraw K4TAX]

Announced at Tokyo Ham Fair

https://qrpblog.com/2019/08/icom-ic-705-hf-vhf-uhf-portable-transceiver-announced/ 


And several other places if you google it.
Will compete with the KX2/KX3
 30kHz to 144MHz + 70cm band
10w on 13.8v, 5w on internal battery
nice panadapter/sweep that they use in 7300, touch screen
tad bit bigger than a kx3.
includes bluetooth, wireless LAN, etc.
Two interesting quotes:
--
The system architecture is direct-sampling SDR below 25MHz and 
down-conversion IF sampling for frequencies of 25MHz and above. This is 
obviously the biggest differentiator in this class, while competitors 
such as Elecraft KX3 & KX2 / Xiegu X5105 / Yaesu FT-817 & FT-818 use 
older inferior technology. As learned from the Icom IC-7300 a few years 
back, the mix of performance, features and affordability brought by 
direct-sampling SDR is a sure bet.

--

The Icom IC-705 is expected to be available around March 2020. No word 
yet on price, but the sub-US$1000 mark shouldn’t be too hard to hit.



73

Bob, K4TAX


On 9/2/2019 10:43 AM, Petr, OK1RP/M0SIS wrote:

Hi,

it looks like they’re going after the KX3...
If it will be as bad as 7300 then we can stay calm and keep our KX3 in
peace. hi
It is too big for backpacking btw...





-
73 - Petr, OK1RP
"Apple & Elecraft freak"
B:http://ok1rp.blogspot.com
MeWe: https://bit.ly/2HGPoDx
MeWe: https://bit.ly/2FmwvDt
--
Sent from: http://elecraft.365791.n2.nabble.com/
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Re: [Elecraft] KPA500 STBY to OPER

[Andy Durbin]

"It works very well. The op has to set the K3 so that the power is controller 
per-band. When the KPA is switched to OPmode, it sends a message to the K3. The 
K3 then switches to the amplifier selection for power, which the op has set 
specifically for the KPA."

Jack,

I'd love to see the worst case system timing diagram for that but I know that's 
not likely.  Either the [KPA500 state]>[K3]>[K3 power control] is very fast or 
the KPA500 does not fault as fast as I though it did.  Perhaps both?

So, no KPA500 fault, no power spike, and no damage when KPA500 is switched to 
OPER when K3 is transmitting with 100 W output.  I'll have to move that one to 
the "good as" list from the "better than" list if I even do a write up on my 
TS-590/Elecraft controller.    "Good as Integrated K3/KAT500/KPA500" was a top 
level system requirement.  "Better than"  was just nice to have.   

73,
Andy, k3wyc








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Re: [Elecraft] KPA500 STBY to OPER

[Rick WA6NHC]

This feature works VERY well, with the occasional hiccup that the power 
isn't lowered, causing a fault (rare, likely not enough time for the 
signals to pass between the boxes).


I *DO* suggest that you also set up the amp input/output for *ALL* 
bands, in particular the bands where the power limits are much lower 
(60M for example, 100 watts ERP compared to a dipole) so if you fail to 
recall as you change bands, you don't accidentally exceed limits with 
the amp in operate mode.


Rick NHC

On 9/2/2019 7:36 AM, Jack Brindle via Elecraft wrote:

Andy;

It works very well. The op has to set the K3 so that the power is controller 
per-band. When the KPA is switched to OPmode, it sends a message to the K3. The 
K3 then switches to the amplifier selection for power, which the op has et 
specifically for the KPA. The converse is also true, switching the KPA to STBY 
also sends a message that causes the K3 to realize the KPA’s state and move 
back to its main power setting for the band.

Note that the power level is set for each band for both normal and KPA drive  
levels. This is well documented in the KPA manual and also in the K3 manual(s).

73!
Jack, W6FB



On Sep 2, 2019, at 6:58 AM, Andy Durbin  wrote:

"With my K3S, when I switch the KPA500 to Operate, the transceiver is automatically 
reduced to the correct power to drive the amp."

Bob,

I'm curious to know how well that feature works.  Let's say your KPA500 is 
STBY, your K3 is set to 100 W out, and you are transmitting in a digital mode.  
What happens when you switch the KPA500 to OPER?

If you don't know the answer please don't it!

My  controller ensures that the KAT500 key line is inhibited when the KPA500 is 
in STBY.  When the KPA500 goes to OPER I set appropriate exciter power, and 
only when correct power has been verified do I enable the key line.  If I'm 
transmitting at 100W with KPA500 in STBY then selecting OPER gives a brief 
power reduction before establishing high power output.

73,
Andy k3wyc
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Re: [Elecraft] KPA500 STBY to OPER

[Rick WA6NHC]

Close but no.

With the amp in standby, the power out up to 100 W is determined by the 
power setting (knob) on the K3.


With the amp in operate, the (reduced drive) power is determined by the 
power setting on the K3; best if the 'Set by band' feature is used (the 
amount of drive for the desired output varies according to the band in use).


You use the _same_ knob for operate/standby, it remembers.  It can't be 
simpler.


Rick NHC


On 9/2/2019 7:45 AM, Bob McGraw K4TAX wrote:

Andy et al:

With the station configured as shown in the KAT500 manual, page 5 
Figure 1, when operating a digital mode or any mode for that matter, 
and the amp is in STBY the K3S is delivering the power as set by the 
PWR control.    Normally 100 watts.   When the KPA500 is then switched 
to OPER the PWR on the K3S is set to the value as defined in the PWR 
SET menu.    Typically 20 watts drives the KPA500 to 400 to 500 watts 
output.   Thus there are 2 sets of per band power settings, one for 
barefoot operation and one for use with the amp.


As to how well it works, I'd say 100% as I have observed no 
mis-operation or fault indication in the 2 years of using the station 
on a daily basis.


73

Bob, K4TAX

On 9/2/2019 8:58 AM, Andy Durbin wrote:
"With my K3S, when I switch the KPA500 to Operate, the transceiver is 
automatically reduced to the correct power to drive the amp."


Bob,

I'm curious to know how well that feature works.  Let's say your 
KPA500 is STBY, your K3 is set to 100 W out, and you are transmitting 
in a digital mode.  What happens when you switch the KPA500 to OPER?


If you don't know the answer please don't it!

My  controller ensures that the KAT500 key line is inhibited when the 
KPA500 is in STBY.  When the KPA500 goes to OPER I set appropriate 
exciter power, and only when correct power has been verified do I 
enable the key line.  If I'm transmitting at 100W with KPA500 in STBY 
then selecting OPER gives a brief power reduction before establishing 
high power output.


73,
Andy k3wyc


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Re: [Elecraft] KPA500 STBY to OPER

[Jack Brindle via Elecraft]

Maybe to the “Not quite as good as…” category. The issue is timing. Your code 
has to poll to determine the KPA op state, then start all the transitions which 
will result in the PTT line being negated. There are a lot of delays involved 
here.

With the K3/KPA, the button press causes the KPA to send the mode change data 
to the K3 immediately. We wait until the data transfer is complete before 
starting the actual mode transition. By the time it is done and the KPA is 
ready to go, the K3 has processed the message and switched to the alternate 
(KPA) power level. By the time the K3 has displayed the KPA mode change on its 
display it has already made the change internally.

Now realistically will anyone see a difference between the two methods? 
Probably not. The only real way to tell would be to start sending a CW message 
then tap the mode button to move the KPA to OP mode during the transition. Both 
methods will pick up the change, but the built-in method will do it slightly 
faster because of its advantage with not having to poll for the mode state 
change over the serial port.

Nice job with the controller, by the way. I look forward to your write-up.

73!
Jack, W6FB


> On Sep 2, 2019, at 9:46 AM, Andy Durbin  wrote:
> 
> "It works very well. The op has to set the K3 so that the power is controller 
> per-band. When the KPA is switched to OPmode, it sends a message to the K3. 
> The K3 then switches to the amplifier selection for power, which the op has 
> set specifically for the KPA."
> 
> Jack,
> 
> I'd love to see the worst case system timing diagram for that but I know 
> that's not likely.  Either the [KPA500 state]>[K3]>[K3 power control] is very 
> fast or the KPA500 does not fault as fast as I though it did.  Perhaps both?
> 
> So, no KPA500 fault, no power spike, and no damage when KPA500 is switched to 
> OPER when K3 is transmitting with 100 W output.  I'll have to move that one 
> to the "good as" list from the "better than" list if I even do a write up on 
> my TS-590/Elecraft controller."Good as Integrated K3/KAT500/KPA500" was a 
> top level system requirement.  "Better than"  was just nice to have.   
> 
> 73,
> Andy, k3wyc
> 
> 
> 
> 
> 
> 
> 
> 

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Re: [Elecraft] It's no KX4 but...

[Paul Van Dyke]

I will stand on a soapbox and say it now, Wayne, Eric and the rest of the
crew have been very very quiet. That should make you think

Paul KB9AVO

On Mon, Sep 2, 2019, 11:51 AM Bob McGraw K4TAX  wrote:

> Announced at Tokyo Ham Fair
>
>
> https://qrpblog.com/2019/08/icom-ic-705-hf-vhf-uhf-portable-transceiver-announced/
>
> And several other places if you google it.
> Will compete with the KX2/KX3
>   30kHz to 144MHz + 70cm band
> 10w on 13.8v, 5w on internal battery
> nice panadapter/sweep that they use in 7300, touch screen
> tad bit bigger than a kx3.
> includes bluetooth, wireless LAN, etc.
> Two interesting quotes:
> --
> The system architecture is direct-sampling SDR below 25MHz and
> down-conversion IF sampling for frequencies of 25MHz and above. This is
> obviously the biggest differentiator in this class, while competitors
> such as Elecraft KX3 & KX2 / Xiegu X5105 / Yaesu FT-817 & FT-818 use
> older inferior technology. As learned from the Icom IC-7300 a few years
> back, the mix of performance, features and affordability brought by
> direct-sampling SDR is a sure bet.
> --
>
> The Icom IC-705 is expected to be available around March 2020. No word
> yet on price, but the sub-US$1000 mark shouldn’t be too hard to hit.
>
>
> 73
>
> Bob, K4TAX
>
>
> On 9/2/2019 10:43 AM, Petr, OK1RP/M0SIS wrote:
> > Hi,
> >
> > it looks like they’re going after the KX3...
> > If it will be as bad as 7300 then we can stay calm and keep our KX3 in
> > peace. hi
> > It is too big for backpacking btw...
> >
> >
> >
> >
> >
> > -
> > 73 - Petr, OK1RP
> > "Apple & Elecraft freak"
> > B:http://ok1rp.blogspot.com
> > MeWe: https://bit.ly/2HGPoDx
> > MeWe: https://bit.ly/2FmwvDt
> > --
> > Sent from: http://elecraft.365791.n2.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
> >
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> > Message delivered to rmcg...@blomand.net
>
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Re: [Elecraft] KPA500 STBY to OPER

[Andy Durbin]

"The issue is timing. Your code has to poll to determine the KPA op state, then 
start all the transitions which will result in the PTT line being negated."

No, not true.  There is no timing issue with my implementation since the key 
line is ALWAYS inhibited while KPA500 is in STBY mode.   Required conditions 
have to be met before the key line is enabled.  Any delay due to my slow system 
interfaces simply means that it takes a bit longer for the KPA500 to be set to 
OPER power level.

Thanks for the explanation of the KPA500 K3 power control interface.

The driver for  doing a write up of my controller will probably be my club's 
presentations manager.  He has twisted my arm a few times to prepare and give 
presentations and I'm probably due for another turn in the barrel.

73,
Andy, k3wyc

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[Elecraft] It's no KX4 but...

[John Harper]

They missed the mark by having:
1) No ATU
2) No ethernet connectivity with a computer

John AE5X
https://ae5x.blogspot.com
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[Elecraft] K4 ACC connector to KPA1500

[Jim Miller]

Today the accessory connector between the K3s and KPA1500 provides information 
to let the K3s know the KPA1500 is present and operating as well as 
bidirectional information about which band is selected and frequency 
information as well to tune the KAT in the KPA1500. 

Since I have the key line interrupted that is separately provided. 

So can the K4 communicate with the KPA1500 exclusively either by its USB or 
ethernet to replace the serial bus and band data functions from the accessory 
cable?

I hate jackscrews!

Thanks 

Jim ab3cv (who now needs to replace one on RF deck...)
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Re: [Elecraft] It's no KX4 but...

[Bob McGraw K4TAX]

Well you know what happened with the KPA1500,  nothing said until it was 
shown.  And you know what was said about the K4, nothing said or shown 
until Hamvention.    They are very good at keeping things under wraps.   
I figure that ICOM has shown their hand of cards while Eric and Wayne 
are sitting back smiling.   Nothing better than a good poker face.


73

Bob, K4TAX

On 9/2/2019 12:51 PM, Paul Van Dyke wrote:
I will stand on a soapbox and say it now, Wayne, Eric and the rest of 
the crew have been very very quiet. That should make you think


Paul KB9AVO

On Mon, Sep 2, 2019, 11:51 AM Bob McGraw K4TAX > wrote:


Announced at Tokyo Ham Fair


https://qrpblog.com/2019/08/icom-ic-705-hf-vhf-uhf-portable-transceiver-announced/


And several other places if you google it.
Will compete with the KX2/KX3
  30kHz to 144MHz + 70cm band
10w on 13.8v, 5w on internal battery
nice panadapter/sweep that they use in 7300, touch screen
tad bit bigger than a kx3.
includes bluetooth, wireless LAN, etc.
Two interesting quotes:
--
The system architecture is direct-sampling SDR below 25MHz and
down-conversion IF sampling for frequencies of 25MHz and above.
This is
obviously the biggest differentiator in this class, while competitors
such as Elecraft KX3 & KX2 / Xiegu X5105 / Yaesu FT-817 & FT-818 use
older inferior technology. As learned from the Icom IC-7300 a few
years
back, the mix of performance, features and affordability brought by
direct-sampling SDR is a sure bet.
--

The Icom IC-705 is expected to be available around March 2020. No
word
yet on price, but the sub-US$1000 mark shouldn’t be too hard to hit.


73

Bob, K4TAX


On 9/2/2019 10:43 AM, Petr, OK1RP/M0SIS wrote:
> Hi,
>
> it looks like they’re going after the KX3...
> If it will be as bad as 7300 then we can stay calm and keep our
KX3 in
> peace. hi
> It is too big for backpacking btw...
>
>
>
>
>
> -
> 73 - Petr, OK1RP
> "Apple & Elecraft freak"
> B:http://ok1rp.blogspot.com
> MeWe: https://bit.ly/2HGPoDx
> MeWe: https://bit.ly/2FmwvDt
> --
> Sent from: http://elecraft.365791.n2.nabble.com/
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[Elecraft] XV Stack for sale over 50% off

[Rajiv Dewan]

For sale:
Elecraft XV stack (original owner)

XV50 with optional oven originally $404 for sale at $180
XV144 with optional oven originally $394 for sale at $190
XV222 with optional oven originally $394 for sale at $190
XV432 with optional oven originally $444 fro sale at $200

$10 CONUS shipping for each XV

Or the whole stack for $750, no shipping charge for CONUS.  This is the 
whole stack for less than the price of two.


Raj, N2RD



--
Raj Dewan, N2RD
rdew...@rochester.rr.com
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[Elecraft] The SP-3 is spoken for

[Ron Genovesi]

  The SP-3 is spoken for.

 Ron Genovesi
 n3...@coastside.net





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[Elecraft] ELECRAFT K3 + ACCESSORIES FROM SK ESTATE

[Donald Schliesser]

ELECRAFT K3 - SER. #8873 (note interesting number). Purchased Factory 
assembled Feb. 2015, factory updated 2018, all accessories factory 
installed - Price new $3,935 (have invoices)


*Includes:*
*
*
2.7 Khz. filter, KFL3A-400F Hz. 8 pole filter F=factory installed
KAT3-F - Antenna Tuner
KXV3A-F - Rx ant., IF out, preamp & transverter interface
KX3VB-F - Rx ant., IF out, preamp & transverter interface
KIO3BUPKT-F - KIO3B upgrade kit (factory installed)
KUSB-F - Universal Serial Bus adapter
Hand Microphone - Elecraft (brand new)
Regular Manual + Kady, KE7X Manual

*PLUS*: LP-PAN-2 PANADAPTER for K3, AND XONAR U5, USB STAND-ALONE SOUND 
CARD.

(these 2 items retail for $250).

All of these items come from a non-smoking environment.

Priced to SELL - *$1,995
*
Shipping $50 - Will accept PayPal,  USPS MO or check(will ship when 
funds clear)


If interested, please contact me direct.

73, Donald K6RV

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Re: [Elecraft] It's no KX4 but...

[Wes]

Makes me think they are busting butts to finish K4 design and production.

Wes  N7WS

On 9/2/2019 10:51 AM, Paul Van Dyke wrote:

I will stand on a soapbox and say it now, Wayne, Eric and the rest of the
crew have been very very quiet. That should make you think

Paul KB9AVO



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Re: [Elecraft] It's no KX4 but...

[ktalbott]

... it does set the bar for the KX4.

-Original Message-
From: elecraft-boun...@mailman.qth.net  On 
Behalf Of Wes
Sent: Monday, September 2, 2019 10:06 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] It's no KX4 but...

Makes me think they are busting butts to finish K4 design and production.

Wes  N7WS

On 9/2/2019 10:51 AM, Paul Van Dyke wrote:
> I will stand on a soapbox and say it now, Wayne, Eric and the rest of 
> the crew have been very very quiet. That should make you think
>
> Paul KB9AVO
>

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delivered to ktalb...@gamewood.net 

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[Elecraft] OT: The Great Solar Storm of 1859

[Keith N6JPA]

The Great Solar Storm of 1859

On September 2, 1859, a massive solar storm composed of subatomic 
charged particles slammed into the earth’s protective magnetosphere. It 
ignited countless fires and caused sparks to spew from telegraph 
machines, shocking their operators. It also created a dramatic show of 
aurora borealis, or northern lights, as far south as the Caribbean. 
Solar storms occur when enormous bubbles of superheated plasma are 
periodically ejected from the sun. Scientists believe that if a similar 
solar storm were to happen today, it would cause catastrophic damage by 
crippling power grids, satellites, GPS, and communications systems. Such 
an event could leave North American without power for months or years 
and could carry an economic impact as high as $2 trillion.




While conducting observations from his private observatory outside of 
London on the morning of September 1, 1859, British amateur astronomer 
Richard Carrington noticed patches of intense white light erupt from the 
sun. The eruptions lasted about five minutes before dissipating. Little 
did Carrington know the flare he observed sent solar wind shock waves 
carrying supercharged plasma racing towards the earth. Hours later, 
those particles slammed into the earth’s magnetic shield, creating 
auroral flashes and clouds in vivid colors of red, violet, pink, and 
green. This single solar storm carried the energy equivalent of 10 
billion atomic bombs and is known as the Carrington Event.

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