Re: [Elecraft] Product Idea - 25 Watt PA for the K3

12 On 2/23/2017 3:42 PM, Harry Yingst via Elecraft wrote: If I recall the 100w PA switches on when you go over 10w __ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Don makes an excellent point. I started with a minimal K3 and built it out "under the XYL's radar", enjoying it every step of the upgrade path. The second receiver was the killer upgrade for trying to work DX with big pileups. (I already had the P3.) The other big advantage of the modular

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

If I recall the 100w PA switches on when you go over 10w From: "j...@kk9a.com" <j...@kk9a.com> To: Jim Miller <j...@jtmiller.com> Cc: Elecraft Reflector <elecraft@mailman.qth.net>; jtmille...@gmail.com Sent: Thursday, February 23, 2017 5:31 PM Subject: Re:

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Maybe so. I think it would be nice if you could control when the 100w PA switches on or perhaps just have it one all of the time. John KK9A On 2017-02-23 09:50, Jim Miller wrote: > I'll take a guess. > > All transmitters have multiple stages to get to 100-200 watts. Tapping off > the 10w

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

I originally purchased a K3/10 which limits output at 12w (how linear?). Then a year ago I bought the KXPA100 which drives to 100w with about 5w which is 42% of max output and should be much more linear out of the K3. I haven't determined the drive required for 25w output from the KXPA100

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

9 AM Subject: Re: [Elecraft] Product Idea - 25 Watt PA for the K3 And 25w isn't sufficient to drive the KPA to full power on all bands. jim ab3cv On Thu, Feb 23, 2017 at 9:53 AM, Don Wilhelm <donw...@embarqmail.com> wrote: > John, > > Historically, Elecraft has always offe

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

That is correct. While typically in the 25-35 W range, It can require up to the low 40 W range in some cases. Eric /elecraft.com/ On 2/23/2017 6:59 AM, Jim Miller wrote: And 25w isn't sufficient to drive the KPA to full power on all bands. jim ab3cv On Thu, Feb 23, 2017 at 9:53 AM, Don

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

I think this issue of distortion when driving amps at near their limit was highlighted early on by a change Elecraft made on the K3. Initially the K3 could be dialed up to 110 watts. However, IMD got pretty rough at that level. So, Elecraft dropped the maximum down to just 100 watts, and the

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

And 25w isn't sufficient to drive the KPA to full power on all bands. jim ab3cv On Thu, Feb 23, 2017 at 9:53 AM, Don Wilhelm wrote: > John, > > Historically, Elecraft has always offered options - on the premise that > "if you don't need/want it, you don't have to buy

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

John, Historically, Elecraft has always offered options - on the premise that "if you don't need/want it, you don't have to buy it". As a result, the KPA3, KAT3, Bandpass filters for general coverage, 2nd receiver, DVR, extra roofing filters are optional. For instance, those who want a

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

I'll take a guess. All transmitters have multiple stages to get to 100-200 watts. Tapping off the 10w stage was easy to do and makes a nice QRP rig. I used my K3 for several years as QRP only before getting the 100w amp and eventually the KPA/KAT combo. jim ab3cv On Thu, Feb 23, 2017 at 9:32

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

I am a little late to the Elecraft party, why does this transceiver use a separate 100 watt module instead of just having a 100 to 200 watt transmitter like other manufactures? John KK9A Harry Yingst Seeing how the KPA- 500 tends to need less than 25 watts to drive it to full output (500 watts)

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Have you done the RF exposure calcs? I have the same issues. It turns out that on all HF bands, it is difficult to exceed the limits at 100 watts. Just 5 to 10 ft from the antenna provides enough distance. 73 de Brian K3KO Sent from my iPad > On Feb 22, 2017, at 10:06 PM, Aaron Lee

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

+1 on this. ~25w, (optional) built in battery pack and tuner. Integration with the KX2 ,KX3 and maybe the K2 and K3(S) for automatic band changing and so on. That would be awesome. 73 LA4TTA Erlend 2017-02-23 10:40 GMT+01:00 Myron Schaffer : > In keeping with my purchasing

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

>> Cameron -AF7DK/GM7LQR >> >> >> >> From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Matthew Cook >> <vk...@bistre.net> >> Sent: Wednesday, February 22, 2017 7:32 PM >> To: Harry Yingst >

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

regards, Cameron -AF7DK/GM7LQR From: Elecraft <elecraft-boun...@mailman.qth.net> on behalf of Matthew Cook <vk...@bistre.net> Sent: Wednesday, February 22, 2017 7:32 PM To: Harry Yingst Cc: Elecraft Reflector Subject: Re: [Elecraft] Product Idea

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Hi again, If I could amplify that a bit further, no pun intended, if you can afford the KPA500, you surely can afford the KPA3 option in the K3. And it is a better driver option for the KPA500. AB2TC - Knut ab2tc wrote > Hi, > > Very good points indeed. I am not surprised at all that the KPA3

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Hi, Very good points indeed. I am not surprised at all that the KPA3 is much cleaner at 30W than the K3/10 is at 10W. At 25/30W it's loafing along close to its optimum IMD level and the "driver" (the KPA3/10) is loafing along at 3W or less. So let's face it, neither of these amplifiers are very

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Harry Yingst Cc: Elecraft Reflector Subject: Re: [Elecraft] Product Idea - 25 Watt PA for the K3 To make this idea work you need to make a 25Wpep amplifier that is kept in it's linear region so that the IMD from this amplifier does not cause problems in the output of the KPA500. To make a c

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

To make this idea work you need to make a 25Wpep amplifier that is kept in it's linear region so that the IMD from this amplifier does not cause problems in the output of the KPA500. To make a class A-B 25W amplifier such as this with enough linearity will result in you designing an amplifier

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Seems to me that IMD might be noticeably worse that way At 01:25 PM 2/22/2017, Harry Yingst via Elecraft wrote: Seeing how the KPA- 500 tends to need less than 25 watts to drive it to full output (500 watts) It got me thinking about a 25 watt PA Option. Would it be possible to replace

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

I'm dealing with indoor and hidden antennas for the next few years, 25 watts makes it much easier to stay within uncontrolled exposure limits than 100 watts. 25 watts is much more appropriate for my confined urban environment. It's also enough to have fun with the CW and digital modes I enjoy. I

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Good idea. I would have went for that if it was available. 73, phil, K7PEH > On Feb 22, 2017, at 1:25 PM, Harry Yingst via Elecraft > wrote: > > > Seeing how the KPA- 500 tends to need less than 25 watts to drive it to full > output (500 watts) It got me thinking

Re: [Elecraft] Product Idea - 25 Watt PA for the K3

Harry I like this idea. István, HA4ZD __ 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

[Elecraft] Product Idea - 25 Watt PA for the K3

Seeing how the KPA- 500 tends to need less than 25 watts to drive it to full output (500 watts) It got me thinking about a 25 watt PA Option.  Would it be possible to replace the existing 10 watt PA board with a 25 watt PA board that would use a larger heatsink instead of the case. If the