A long time ago. The KPA500 is over $4 per watt. Sent from my iPhone ...nr4c. bill
> On Apr 21, 2017, at 6:42 PM, Fred Jensen <k6...@foothill.net> wrote: > > So I guess the former rule of thumb, "One Dollar per Watt" has met some > unspecified death. > > 73, > > Fred ("Skip") K6DGW > Sparks NV USA > Washoe County DM09dn > > > >> On 4/21/2017 12:30 PM, Edward R Cole wrote: >> Congrats to all who have wanted a KPA1500 (I'm not currently a prospect): >> >> Interesting misconceptions already "flying" >> "1500w cost three times 500w" >> >> KPA1500 with internal tuner = $5995 >> KPA500+KAT500 = $2684.95* >> 5995/2684.95 = 2.23 >> *April special price >> >> Power requirement 240vac @ 20A = 4800w >> But likely the amp will draw 1500w/0.7 = 2143w (or so) plus maybe 200-300w >> for solid-state control ckts >> call it 2400w in round numbers or 240v @ 10A (just my guess) >> >> My 6m 1000w PA draws 50A @ 50v = 2500w (40% eff. with 16 transistors) >> My 2m-8877 1400w PA draws 750ma @ 3700v = 2775w (50% eff. but with tired old >> tube) >> >> 20A is a convenient 240v value since breakers for that are readily >> available; I ran about 45-feet of No. 8 wiring to bring 240vac to my shack >> where I use a 60A breaker box with a 20A breaker (only tripped a couple >> times in several years useage - HV flashover & HV transformer failure). >> >> I ran my own 240v run as I tired of waiting five months for the $700 >> Electrician to show up. I think the 4 cond. No. 8 cable ran about >> $1.50/foot plus costs for 30A 240v twist lock connectors/outlets & 60A >> utility box with three breakers. I see 2v drop on 240vac under load of the >> 8877. >> >> KPA1500 nice design using separate 50v switching PS. Many new ham radio >> PA's coming out that use 50v so this could be multi-use PS. I would like a >> 2m 1500w sspa using LDMOS to replace the 8877 & HVPS. Not looking for that >> from Elecraft (I will probably buy a kit from W6PQL). >> >> PS: if I were in market for HF QRO the KPA1500 would be my choice! I >> finally upgraded to the KXPA100+KXAT100 for my HF/6m needs (driven by either >> KX3 or K3/10). >> >> 73, Ed - KL7UW >> http://www.kl7uw.com >> Dubus-NA Business mail: >> dubus...@gmail.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 >> >> This list hosted by: http://www.qsl.net >> Please help support this email list: http://www.qsl.net/donate.html >> Message delivered to k6...@foothill.net >> >> >> -- >> This message has been scanned by E.F.A. Project and is believed to be clean. >> >> >> >> --- >> This email has been checked for viruses by AVG. >> http://www.avg.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 > > This list hosted by: http://www.qsl.net > Please help support this email list: http://www.qsl.net/donate.html > Message delivered to n...@widomaker.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 This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html Message delivered to arch...@mail-archive.com