[Elecraft] Linear thoughts

[W0MU Mike Fatchett]

I think the FCC is going to change the rules on the gain factor, 
hopefully soon.

1500w out on RTTY with zero limitations on duty cycle or very little 
limitation.

Very quiet cooling.

6m would be nice but probably an issue at that power.

Price is probably the biggest what if.

No tune obviously.

Built in tuner.  If you can make the amp like 3:1 SWR's great then no 
tuner.

I would love to be able to share the amp with my 2nd K3.  SO2R or 
similar type operations.

I would be ok with a separate power supply separate from the amp part to 
keep the size as small as possible.

Fully remote controllable with USB/Ethernet including an on off function 
or reset.

W0MU




On 3/23/2017 11:46 PM, Matthew Cook wrote:
> Eric,
>
> That's easy, #1 requirement should be spectral purity at full smoke.  So
> simply take the features and functions of the KPA500 and increase output to
> 1500W PEP.   I'd not like to see Elecraft waste their time with an
> Spurious/IMD spec that only just pass the FCC requirements, it's about time
> someone showed leadership here.   At the very least I'd expect to see
> Spurious emissions 60dB (or more) below PEP and IMD 30dB (or more) below
> PEP across all bands, I'll admit this is not easy to do from 1.8-50MHz but
> it's also not impossible.  This is the minimum commercial spec for 1kW HF
> gear here in VK already, for inspiration Codan 3062 or LINEARamp Gemini.
> However it's not easy especially since the FCC ties your hands behind your
> backs in terms of gain from the get go.
>
> The nice to haves (wish list) would be;
>
>     - Four antenna output with an internal tuner that could flatten antennas
>     that creep up towards 3:1 at the band edges (ala alpha 9500 series)
>     - Limit the weight of the KPA1500 to the same as the KPA500 is now
>     (preferably lighter) so switchmode PSU's this time please.
>     - Make allowances for those countries that aren't limited to FCC 13dB
>     gain, we'd be happy with just 16dB (*30-40W grin*) and let us pocket the
>     IMD/Spurious improvements
>
> If Elecraft were to make such an amp with this sort of spectral purity I'd
> be inclined to complete the necessary paperwork for a high power variation
> on my license here in VK and purchase an amp.  I've toyed with the Gemini
> Amp a couple of times but the integration of the KPA500 eventually tipped
> the balance.
>
> Then all we've got to do is get more people pointing their beams at us
> during DXpeditions and Contests and we'd be set.
>
> 73
>
> Matthew
> VK5ZM
>
> On 18 March 2017 at 03:36, Eric Swartz - WA6HHQ, Elecraft <eric at elecraft.com
>> wrote:
>> Interesting discussion.
>>
>> Folks, if we did introduce a 1500 W solid state amp similar to our KPA500
>> in operation, what features etc would be important?
>>
>> 73,
>> Eric
>> /elecraft.com/
>>
>>
>>
>> ______________________________________________________________
>> Elecraft mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/elecraft
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:Elecraft at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>> Message delivered to vk5zm at bistre.net
>>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:Elecraft at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
> Message delivered to w0mu at w0mu.com