Elecraft › [K3]

[K3] K3: Limit output power with KPA3?

Classic

List

Threaded

7 messages Options

K2QI

May 14, 2009; 4:07pm

[K3] K3: Limit output power with KPA3?

Dear all,

I've checked the KPA3 manual along with the K3 manual, and didn't find any mention of a way to limit maximum output power with the KPA3.

What I'd like to know then, is there something buried within the menu that would allow me to set max output to something like 30 - 40 watts? That way if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and I mean to adjust compression instead), that it doesn't go above a pre-defined setting?

73 de James K3JPS

--... ...-- -.. . .--- .- -- . ...

M0XDF

May 14, 2009; 4:10pm

Re: K3: Limit output power with KPA3?

surely this is the PWR control - there is no way to set an upper limit
as far as I know.
73 de M0XDF, K3 #174
--
Do not meddle in the affairs of Dragons,
For you are crunchy and taste good with ketchup!

On 14 May 2009, at 17:07, K3JPS wrote:

>
> Dear all,
>
> I've checked the KPA3 manual along with the K3 manual, and didn't
> find any
> mention of a way to limit maximum output power with the KPA3.
>
> What I'd like to know then, is there something buried within the
> menu that
> would allow me to set max output to something like 30 - 40 watts?
> That way
> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and
> I mean
> to adjust compression instead), that it doesn't go above a pre-defined
> setting?

... [show rest of quote]

______________________________________________________________
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

K2QI

May 14, 2009; 4:37pm

Re: K3: Limit output power with KPA3?

Well obviously it is the power control. What I simply wanted to know was
whether or not the ability existed to set software limits on that physical
control. To me, it doesn't seem like a hard thing to implement in firmware.

The reason for asking is I'm limited in terms of how much output power I can
run with an amplifier. If I wanted to tune with max drive being
40-50 watts, then I wanted to know if there was a way of setting limits on
the power control knob. I've made the mistake of adjusting power output
instead of compression on more than one occasion.

73 James

On Thu, May 14, 2009 at 12:10 PM, David Ferrington, M0XDF <
[hidden email]> wrote:

> surely this is the PWR control - there is no way to set an upper limit as
> far as I know.
> 73 de M0XDF, K3 #174
> --
> Do not meddle in the affairs of Dragons,
> For you are crunchy and taste good with ketchup!
>
>
> On 14 May 2009, at 17:07, K3JPS wrote:
>
>
>> Dear all,
>>
>> I've checked the KPA3 manual along with the K3 manual, and didn't find any
>> mention of a way to limit maximum output power with the KPA3.
>>
>> What I'd like to know then, is there something buried within the menu that
>> would allow me to set max output to something like 30 - 40 watts? That
>> way
>> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and I
>> mean
>> to adjust compression instead), that it doesn't go above a pre-defined
>> setting?
>>
>
>

... [show rest of quote]

--... ...-- -.. . .--- .- -- . ...

M0XDF

May 14, 2009; 4:41pm

Re: K3: Limit output power with KPA3?

Sorry, didn't mean to be rude, started with 'just use the power
control' in my head and then realised you wanted a limiter, which at
present there is not.
-k
--
All the world's a stage and most of us are desperately unrehearsed.
-Sean O'Casey, playwright (1880-1964)

On 14 May 2009, at 17:37, K3JPS wrote:

> Well obviously it is the power control. What I simply wanted to
> know was whether or not the ability existed to set software limits
> on that physical control. To me, it doesn't seem like a hard thing
> to implement in firmware.
>
> The reason for asking is I'm limited in terms of how much output
> power I can run with an amplifier. If I wanted to tune with max
> drive being 40-50 watts, then I wanted to know if there was a way of
> setting limits on the power control knob. I've made the mistake of
> adjusting power output instead of compression on more than one
> occasion.
>
> 73 James
>
> On Thu, May 14, 2009 at 12:10 PM, David Ferrington, M0XDF <[hidden email]
> > wrote:
> surely this is the PWR control - there is no way to set an upper
> limit as far as I know.
> 73 de M0XDF, K3 #174
> --
> Do not meddle in the affairs of Dragons,
> For you are crunchy and taste good with ketchup!
>
>
> On 14 May 2009, at 17:07, K3JPS wrote:
>
>
> Dear all,
>
> I've checked the KPA3 manual along with the K3 manual, and didn't
> find any
> mention of a way to limit maximum output power with the KPA3.
>
> What I'd like to know then, is there something buried within the
> menu that
> would allow me to set max output to something like 30 - 40 watts?
> That way
> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and
> I mean
> to adjust compression instead), that it doesn't go above a pre-defined
> setting?
>
>

... [show rest of quote]

Peter Wollan-2

May 14, 2009; 4:59pm

Re: K3: Limit output power with KPA3?

In reply to this post by K2QI

If you tune using the TUNE button instead of by keying, you can set
the power to any desired limit. See page 27 of the manual.

Peter N8MHD

On 5/14/09, K3JPS <[hidden email]> wrote:

> Well obviously it is the power control. What I simply wanted to know was
> whether or not the ability existed to set software limits on that physical
> control. To me, it doesn't seem like a hard thing to implement in firmware.
>
> The reason for asking is I'm limited in terms of how much output power I can
> run with an amplifier. If I wanted to tune with max drive being
> 40-50 watts, then I wanted to know if there was a way of setting limits on
> the power control knob. I've made the mistake of adjusting power output
> instead of compression on more than one occasion.
>
> 73 James
>
> On Thu, May 14, 2009 at 12:10 PM, David Ferrington, M0XDF <
> [hidden email]> wrote:
>
> > surely this is the PWR control - there is no way to set an upper limit as
> > far as I know.
> > 73 de M0XDF, K3 #174
> > --
> > Do not meddle in the affairs of Dragons,
> > For you are crunchy and taste good with ketchup!
> >
> >
> > On 14 May 2009, at 17:07, K3JPS wrote:
> >
> >
> >> Dear all,
> >>
> >> I've checked the KPA3 manual along with the K3 manual, and didn't find any
> >> mention of a way to limit maximum output power with the KPA3.
> >>
> >> What I'd like to know then, is there something buried within the menu that
> >> would allow me to set max output to something like 30 - 40 watts? That
> >> way
> >> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and I
> >> mean
> >> to adjust compression instead), that it doesn't go above a pre-defined
> >> setting?
> >>
> >
> >
> ______________________________________________________________
> 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
>

... [show rest of quote]

K2QI

May 14, 2009; 5:03pm

Re: K3: Limit output power with KPA3?

In reply to this post by M0XDF

No worries; I didn't think you were rude. I've got pretty thick skin
anyway, hi hi.

Anyway, does anyone else in the group think this feature would be
beneficial?

73, James.

On Thu, May 14, 2009 at 12:41 PM, David Ferrington, M0XDF <
[hidden email]> wrote:

> Sorry, didn't mean to be rude, started with 'just use the power control' in
> my head and then realised you wanted a limiter, which at present there is
> not. -k
> --
> All the world's a stage and most of us are desperately unrehearsed.
> -Sean O'Casey, playwright (1880-1964)
>
> On 14 May 2009, at 17:37, K3JPS wrote:
>
> Well obviously it is the power control. What I simply wanted to know was
> whether or not the ability existed to set software limits on that physical
> control. To me, it doesn't seem like a hard thing to implement in firmware.
>
> The reason for asking is I'm limited in terms of how much output power I
> can run with an amplifier. If I wanted to tune with max drive being
> 40-50 watts, then I wanted to know if there was a way of setting limits on
> the power control knob. I've made the mistake of adjusting power output
> instead of compression on more than one occasion.
>
> 73 James
>
> On Thu, May 14, 2009 at 12:10 PM, David Ferrington, M0XDF <
> [hidden email]> wrote:
>
>> surely this is the PWR control - there is no way to set an upper limit as
>> far as I know.
>> 73 de M0XDF, K3 #174
>> --
>> Do not meddle in the affairs of Dragons,
>> For you are crunchy and taste good with ketchup!
>>
>>
>> On 14 May 2009, at 17:07, K3JPS wrote:
>>
>>
>>> Dear all,
>>>
>>> I've checked the KPA3 manual along with the K3 manual, and didn't find
>>> any
>>> mention of a way to limit maximum output power with the KPA3.
>>>
>>> What I'd like to know then, is there something buried within the menu
>>> that
>>> would allow me to set max output to something like 30 - 40 watts? That
>>> way
>>> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and I
>>> mean
>>> to adjust compression instead), that it doesn't go above a pre-defined
>>> setting?
>>>
>>
>>
>
>

... [show rest of quote]

--... ...-- -.. . .--- .- -- . ...

chen dave

May 15, 2009; 6:26am

Re: K3: Limit output power with KPA3?

My SS AMP need 30~45w to get 1200w or so, I never try to see what will
happen if I set the input power to 100w. Even the AMP have some room for
that(I think) -- it use 16*MRF150.
By the way, ALC cable not used. So maybe it is a good idea to add this
function -- I hope it will be limit for per band,hihi.

73 de ba4rf/David

On Fri, May 15, 2009 at 1:03 AM, K3JPS <[hidden email]> wrote:

> No worries; I didn't think you were rude. I've got pretty thick skin
> anyway, hi hi.
>
> Anyway, does anyone else in the group think this feature would be
> beneficial?
>
> 73, James.
>
>
>
>
> On Thu, May 14, 2009 at 12:41 PM, David Ferrington, M0XDF <
> [hidden email]> wrote:
>
> > Sorry, didn't mean to be rude, started with 'just use the power control'
> in
> > my head and then realised you wanted a limiter, which at present there is
> > not. -k
> > --
> > All the world's a stage and most of us are desperately unrehearsed.
> > -Sean O'Casey, playwright (1880-1964)
> >
> > On 14 May 2009, at 17:37, K3JPS wrote:
> >
> > Well obviously it is the power control. What I simply wanted to know
> was
> > whether or not the ability existed to set software limits on that
> physical
> > control. To me, it doesn't seem like a hard thing to implement in
> firmware.
> >
> > The reason for asking is I'm limited in terms of how much output power I
> > can run with an amplifier. If I wanted to tune with max drive being
> > 40-50 watts, then I wanted to know if there was a way of setting limits
> on
> > the power control knob. I've made the mistake of adjusting power output
> > instead of compression on more than one occasion.
> >
> > 73 James
> >
> > On Thu, May 14, 2009 at 12:10 PM, David Ferrington, M0XDF <
> > [hidden email]> wrote:
> >
> >> surely this is the PWR control - there is no way to set an upper limit
> as
> >> far as I know.
> >> 73 de M0XDF, K3 #174
> >> --
> >> Do not meddle in the affairs of Dragons,
> >> For you are crunchy and taste good with ketchup!
> >>
> >>
> >> On 14 May 2009, at 17:07, K3JPS wrote:
> >>
> >>
> >>> Dear all,
> >>>
> >>> I've checked the KPA3 manual along with the K3 manual, and didn't find
> >>> any
> >>> mention of a way to limit maximum output power with the KPA3.
> >>>
> >>> What I'd like to know then, is there something buried within the menu
> >>> that
> >>> would allow me to set max output to something like 30 - 40 watts? That
> >>> way
> >>> if I inadvertently adjust the CMP/PWR knob when it's set to PWR (and I
> >>> mean
> >>> to adjust compression instead), that it doesn't go above a pre-defined
> >>> setting?
> >>>
> >>
> >>
> >
> >
> ______________________________________________________________
> 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
>

... [show rest of quote]