[Elecraft] Linear thoughts

Fri Mar 17 01:11:51 EDT 2017

Sorry honey, but you can't run the clothes dryer this weekend.

On 3/16/17 7:44 PM, Ron D'Eau Claire wrote:
> Also there is the issue of the mains power available in the "shack".
>
> The KPA500 runs very well off of a decent 120VAC mains source, as I can
> attest from experience. But that is about the limit for a normally (for the
> USA) wired home circuit when a power supply for a K3, lights, etc., are
> included.
>
> Larger amps will *REQUIRE* a 240VAC circuit which, unlike Europe, we in the
> USA seldom have unless special wiring is installed.
>
> 73, Ron AC7AC
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Bill
> Johnson
> Sent: Thursday, March 16, 2017 3:38 PM
> To: Charlie T, K3ICH; elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Linear thoughts
>
> Charlie, I think one of the main reasons for switching to a smaller amp was
> the weight involved in the 1.5Kw rigs.  Just thought I would add back in.
> The MJF AB1000 combiner looks interesting, but I would not touch one unless
> I knew of many who used one successfully.  That way I could get a second
> KPA500, and run 1KW which adds the 3db and I could move the separate parts
> with ease.  :-)
>
> 73,
> Bill
> K9YEQ
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of
> Charlie T, K3ICH
> Sent: Thursday, March 16, 2017 5:20 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Linear thoughts
>
> Well, if you've never tried to work truly "weak" signals, I can assure you
> that +5 dB WILL make a world of difference.
> Otherwise, why would you go to the trouble of installing a ½dB noise figure
> pre-amp at the antenna, just to eliminate 2dB of feed-line loss on receive?
> Or, stacking a second Yagi to gain at most, +3dB?
> Yes, +5dB can be very hard to come by when you're operating at the fringes
> of performance.
> My thoughts are, if you're gonna run an amp at all, go for legal limit.
>
> Not knocking anyone running 200 or 500 or 700 watts, just my own opinion.
>
> 73, Charlie k3ICH
>
>
>
>
> -----Original Message-----
> From: Elecraft [mailto:elecraft-bounces at mailman.qth.net] On Behalf Of Fred
> Jensen
> Sent: Thursday, March 16, 2017 4:35 PM
> To: elecraft at mailman.qth.net
> Subject: Re: [Elecraft] Linear thoughts
>
> Advising Elecraft about producing a larger amplifier is quite a bit above my
> pay grade so I won't go there. However, going to 1,500 watts from 500 watts
> is a bit less than 5 dB -- a little less than one International Standard
> S-unit.  5 dB might come a lot cheaper from an antenna change.
>
> Before purchasing the KPA500, I ran my "1,500 watt Behemoth" at 500 W for
> close to a year to see if I could tell the difference. Admittedly, I'm a
> casual contester and DX'er, and I operate my ham radio for other reasons
> too, but I really couldn't see much if any difference in terms of who I
> could work or how long it took to snag the latest expedition.
> Operating skill [or lack thereof in my case] was a much bigger factor.
> The KPA500 was full QSK which its predecessor was not, which became a big
> advantage.
>
> I have since sold the KPA500 [and KAT500] and run 100W from home. My
> HOA-Stealth "wire on the fence" is close enough to the house that I
> occasionally make something happen [like flash touch-lamps or reset the
> u-wave clock], and I figured 500 W might nuke the neighbor's dog who patrols
> the other side of the fence.  I'm very surprised that the wire,
> 6 feet high, works as well as it does. If I quest for QRO and "real
> antennae," I can always run W7RN remotely.
>
> 73,
>
> Fred ("Skip") K6DGW
> Sparks NV USA
> Washoe County DM09dn
>
> On 3/16/2017 12:26 PM, Erik Basilier wrote:
>> I recently sold my legal limit tube amp after a bit of a mental struggle.
>> The seller in me finally won after I realized that "if I can't lift
>> it, I shouldn't own it". I was tempted to replace it with an ALS-1306,
>> but I operate RTTY and in that mode the 1306 wouldn't be good for more
>> output than a KPA500. Today I received my (new to me) KPA500. However,
>> in a contest someone with 1500 Watts will have a big advantage over my
>> 500 W, so the subject of higher power may soon come back to me.
> ______________________________________________________________
> 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 pincon at erols.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 k9yeq at live.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 ron at cobi.biz
>
> ______________________________________________________________
> 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 n7xy at n7xy.net
>