Re: [Elecraft] KPA500 AC power
I have used my KPA500 on both 110 and 240AC and I can honestly say that I saw no difference in either supply voltage. Mike va3mw > > __ 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
Re: [Elecraft] KPA500 AC power
Make sure the 120v line/outlet is not getting warm. Measure ac voltage with amp off and then in keydown transmit to check voltage drop. I don't have a KPA500 or KPA1500 but did have a 8877 with 4kV PS. It ran at 750ma which is 3000w dc load. That converts to 12.5A at 240v if PS is 100% efficient. At 120v that would run 25A which exceeds rating or No. 12 house wiring. I now have a 1200w sspa that draws 50v-50A (2500w dc). I installed my own 240v using 8-4 wiring bought at Home Depot. I get about 2vac drop when keydown at 1500w RF. I installed a small breaker box in the shack with one dual 20A breaker for 240v and split out two 120v 20A ckts which run my 12v-50A station PS and a 26v MOT repeater PS for my 220-MHz 150w PA. I also have a 1000w 50-MHz sspa powered by 50v-50A switching PS (2500w dc) that uses 240vac. Only run one QRO amp at a time. Running the 8-4 wire from my main load center down thru crawl space under the main floor then back up thru spare bedroom (shack) floor; about 35-foot run. I drilled small holes in floor joists to tie off the cable using wire ties. Crawl space is 4-foot high. Obviously if your house is on concrete slab you would need and alternative. Suggest running outside on house wall with conduit (which can be pvc if cable is sheathed). We have very lax building codes up here so home self-construction is common. Have a licensed electrician do the work if codes require (for insurance coverage). 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 arch...@mail-archive.com
Re: [Elecraft] KPA500 AC power
I would only agree with whoever mentioned the possibility of flickering lights. If you're a CW operator it can be a distraction...if your house wiring can't handle it. Been there... John K7FD -From: "Irwin Darack" To: "Tom Berry" Cc: elecraft@mailman.qth.net Sent: Thursday December 13 2018 5:14:43AM Subject: Re: [Elecraft] KPA500 AC power Unless you are having a problem, save your money. I have two KPA500’s, one plugged into a 220V line at my main house and the other into a 110V line at my beach house and have never seen a difference in performance. In addition, on a number of contests Dx’peditions, were I have my K3s, KPA500 & laptop plugged into the same 110V line, I have not had a problem. Happy Holidays Irwin KD3TB On Wed, Dec 12, 2018 at 7:14 PM Tom Berry wrote: > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > Elecraft mailing list > Home: http://www.qsl.net [1] > Please help support this email list: Message delivered to macymonk...@charter.net Links: -- [1] http://mailman.qth.net/mailman/listinfo/elecraft http://mailman.qth.net/mailman/listinfo/elecraft / Help: http://mailman.qth.net/mailman/listinfo/elecraft http://mailman.qth.net/mailman/listinfo/elecraft / Help: 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
Re: [Elecraft] KPA500 AC power
Unless you are having a problem, save your money. I have two KPA500’s, one plugged into a 220V line at my main house and the other into a 110V line at my beach house and have never seen a difference in performance. In addition, on a number of contests Dx’peditions, were I have my K3s, KPA500 & laptop plugged into the same 110V line, I have not had a problem. Happy Holidays Irwin KD3TB On Wed, Dec 12, 2018 at 7:14 PM Tom Berry wrote: > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > 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 idar...@gmail.com > -- Irwin KD3TB __ 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
Re: [Elecraft] KPA500 AC power
On 12/12/2018 4:44 PM, Jack Brindle via Elecraft wrote: Noting that the current is double for 110V, the heat losses in the power line will actually be quadrupled. If you have #12 wire in your walls (the current NEC code), and use the supplied power cord, things should be just fine. That can depend on how long the run is from the power panel to the outlet. For CQP and 7QP expeditions, we run KPA500s on 120V, and have had issues with under-voltage faults caused by too much IR drop combined with regulation issues with the generator. At home, I run my KPA500 on 240V, because I had 240 brought to the shack before I moved in. Since the power supply is unregulated, an advantage of running on 240V is slightly less voltage drop when the radio is keyed. BTW, IR drop and the associated power lost in wiring feeding electronic loads is significantly greater than predicted by Ohm's law for a sine wave because the current drawn by power supplies is not a sine wave -- current is drawn at the peaks of each half of the AC cycle to recharge the input filter capacitor. 73, Jim K9YC __ 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
Re: [Elecraft] KPA500 AC power
Thanks John, I doubt it in this lifetime. I need SV/A and FR/G. I suppose I could rent a station in New England and work the monk but that wouldn't be on my 120 VAC circuit or from Tucson :-) Wes N7WS On 12/12/2018 7:22 PM, Macy monkeys wrote: There you have it; DX is obviously better on 120V! :) Good luck on those last two, Wes! John K7FD On Dec 12, 2018, at 6:17 PM, Wes Stewart wrote: I run my complete station on a 120V 20A circuit. Wes N7WS 9-band DXCC, need two for top of the Honor Roll. On 12/12/2018 5:13 PM, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? Thanks Tom AA4VV __ 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 macymonk...@charter.net __ 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 wes_n...@triconet.org __ 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
Re: [Elecraft] KPA500 AC power
There you have it; DX is obviously better on 120V! :) Good luck on those last two, Wes! John K7FD > On Dec 12, 2018, at 6:17 PM, Wes Stewart wrote: > > I run my complete station on a 120V 20A circuit. > > Wes N7WS > > 9-band DXCC, need two for top of the Honor Roll. > > > >> On 12/12/2018 5:13 PM, Tom Berry wrote: >> Is there any advantage to use 220 V over 110 V on the KPA500? >> >> Is it worth having an electrician come to the house and install a 220 V >> outlet for it? >> >> >> Thanks >> >> Tom AA4VV > > __ > 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 macymonk...@charter.net __ 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
Re: [Elecraft] KPA500 AC power
Why not? On 12/12/2018 6:05 PM, Nr4c wrote: Lower current. But why on this thread? Sent from my iPhone ...nr4c. bill __ 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
Re: [Elecraft] KPA500 AC power
I run my complete station on a 120V 20A circuit. Wes N7WS 9-band DXCC, need two for top of the Honor Roll. On 12/12/2018 5:13 PM, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? Thanks Tom AA4VV __ 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
Re: [Elecraft] KPA500 AC power
Jack - great answer, many thanks for clearing it up for me. Our home was built in ‘91 so I would guess that it is fairly up to current code, wire-wise. Guess I’ll save my $600 for something else. Maybe a trip to the casinos in Tahoe! Or paying some bills. Hm... :-) Jim Bennett / W6JHB Folsom, CA > On Dec 12, 2018, at 4:44 PM, Jack Brindle wrote: > > James; > > There would be no difference in the heat generated inside the KPA500 since > the KPA’s transformer is delivering the same voltage and current in either > case. The entire difference would be voltage drop on the power line and KPA’s > power cord due to the higher current at 110V. The losses are I*I*R, where I > is the current and R the power line resistance. Noting that the current is > double for 110V, the heat losses in the power line will actually be > quadrupled. > > If you have #12 wire in your walls (the current NEC code), and use the > supplied power cord, things should be just fine. > > 73! > Jack, W6FB > >> On Dec 12, 2018, at 4:27 PM, James Bennett via Elecraft >> wrote: >> >> I’ve wondered the same thing here. While I don’t have the flashing lights >> that Dennis NJ6G does, I DO have a ton of other things plugged in to >> outlets in this room. >> >> Am I off in left field on this: if the amp were to run on a 220 circuit it >> would obviously draw half the current, and thus (to my uneducated brain) >> less current “might” mean less heat generated and a lower temperature inside >> the unit. Does that make sense? >> >> I had an estimate from a licensed electrician who said it would run me about >> $600 to put a 220 outlet in the shack, due to it’s distance (and obstacles >> in the way) from the electrical entry panel. >> >> Kinda pricy, but eliminating some heat in the shack and keeping the KPA500 >> fans running slower would be nice…. >> >> Jim / W6JHB >> >>> On Dec 12, 2018, at 4:13 PM, Tom Berry wrote: >>> >>> Is there any advantage to use 220 V over 110 V on the KPA500? >>> >>> Is it worth having an electrician come to the house and install a 220 V >>> outlet for it? >>> >>> >>> Thanks >>> >>> Tom AA4VV >>> >>> __ >>> 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 w6...@me.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 jackbrin...@me.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
Re: [Elecraft] KPA500 AC power
Lower current. But why on this thread? Sent from my iPhone ...nr4c. bill > On Dec 12, 2018, at 7:13 PM, Tom Berry wrote: > > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > 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
Re: [Elecraft] KPA500 AC power
Depends. If you have a stiff 120 V service from the breaker panel, a service that doesn't loop through other outlets, specially the ones that use the push in the wire type connections, then the KPA500 will run OK on 120 volts. If you have other stuff on that circuit, or have the maximum legal number of duplex outlets of 5 on that circuit, then you may be approaching the limit of a 20 Amp circuit. The IR drop between 120 volts and 240 volts is noticeable, more so as the distance from the breaker panel to the load increases. The IR drop in the wire from the breaker panel to the outlet will be reduced by 1/4th when operated on 240 as compared to 120. There is drop in the outlet, the power cord and such, all will likewise be reduced when a 240 volt service is used. And then if you ever go to the KPA-1500, there is no choice except 240 volts. I ran a dedicated 240 volt service, 20A from the breaker panel with #10-4 wire and feed it from 2 single breakers. The larger than required wire size makes for less IR drop. I also have 2 duplex 20A 120V outlets which are fed from each leg of the 240 V service thus the reason for using #10-4. That provides L1, L2, Neutral, and Ground as required for the 120V duplex outlets. This way I have a good solid power feed to the station. Labor is the most expensive part, copper wire is the next. 73 Bob, K4TAX On 12/12/2018 6:13 PM, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? Thanks Tom AA4VV __ 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 rmcg...@blomand.net __ 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
Re: [Elecraft] KPA500 AC power
No, I have run mine both ways. Works FB on 120v 73 Eric WD6DBM On Wed, Dec 12, 2018, 4:13 PM Tom Berry Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > > __ 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
Re: [Elecraft] KPA500 AC power
Tom, If you have a dedicated 120 volt receptacle in the shack, that would be OK to use, but if it is shared with other receptacles in the house, you will find blinking lights with CW or SSB speech. If you have to run new wiring to the shack, run 240 volts and if you run a 4 wire system, it can be split out to 2 120 volt receptacles that you can use exclusively in the hamshack. Your electrician will know how to split it out. Ask him to use #12 wire, or better yet #10 for a lower voltage drop from the breaker box. Many receptacles are wired with #14 wire (except for kitchen circuits which must be #12 wire according to code). If you have an older house, definitely get dedicated wiring to the shack - who knows what older wiring may entail, it was wired only to the codes at the time of construction. 73, Don W3FPR On 12/12/2018 7:13 PM, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? __ 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
Re: [Elecraft] KPA500 AC power
James; There would be no difference in the heat generated inside the KPA500 since the KPA’s transformer is delivering the same voltage and current in either case. The entire difference would be voltage drop on the power line and KPA’s power cord due to the higher current at 110V. The losses are I*I*R, where I is the current and R the power line resistance. Noting that the current is double for 110V, the heat losses in the power line will actually be quadrupled. If you have #12 wire in your walls (the current NEC code), and use the supplied power cord, things should be just fine. 73! Jack, W6FB > On Dec 12, 2018, at 4:27 PM, James Bennett via Elecraft > wrote: > > I’ve wondered the same thing here. While I don’t have the flashing lights > that Dennis NJ6G does, I DO have a ton of other things plugged in to outlets > in this room. > > Am I off in left field on this: if the amp were to run on a 220 circuit it > would obviously draw half the current, and thus (to my uneducated brain) less > current “might” mean less heat generated and a lower temperature inside the > unit. Does that make sense? > > I had an estimate from a licensed electrician who said it would run me about > $600 to put a 220 outlet in the shack, due to it’s distance (and obstacles in > the way) from the electrical entry panel. > > Kinda pricy, but eliminating some heat in the shack and keeping the KPA500 > fans running slower would be nice…. > > Jim / W6JHB > >> On Dec 12, 2018, at 4:13 PM, Tom Berry wrote: >> >> Is there any advantage to use 220 V over 110 V on the KPA500? >> >> Is it worth having an electrician come to the house and install a 220 V >> outlet for it? >> >> >> Thanks >> >> Tom AA4VV >> >> __ >> 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 w6...@me.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 jackbrin...@me.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
Re: [Elecraft] KPA500 AC power
Yes. The current draw when running at 220V will be half that needed for 110V, which means the heat losses in the power cord and wall wiring will be cut by about one-fourth. This also means the voltage drop on the power cord and wall wiring will be much less at 220V. So, there is a pretty good advantage to running the amplifier at 220V. Having said that, I wasn’t willing to go through the trouble to add 220V outlets to my workshop, so my KPA500s run on 110V. You will hear many folks saying they run the KPA500 just fine at that voltage. Generally if the lights blink when you key the radio it is a good indicator that the wall wiring is too small. In that case you may want to have the electrician install the higher-voltage line. From experience I know that changing out wall wiring is a major effort involving wall patching. Basically, if you want to go through the trouble, go for it. Otherwise enjoy your KPA500 at 110V. 73 and enjoy the KPA500! Jack, W6FB > On Dec 12, 2018, at 4:13 PM, Tom Berry wrote: > > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > 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 jackbrin...@me.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
Re: [Elecraft] KPA500 AC power
Depends on your 120 V supply. I had good wiring, through a sub-panel [an accident of previous construction] and it ran fine for me, no light dimming. I also had 240 V available, but not located conveniently to the KPA500. KPA1500 is probably something else again. Now, here in Sparks, my antenna is on the fence. I sold the KPA/KAT500, but on 160/80, I flash the touch lamps in the bedroom at 100 W. Navy radiomen to the south of us could intercept my CW. 73, Fred ["Skip"] K6DGW Sparks NV DM09dn Washoe County On 12/12/2018 4:13 PM, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? Thanks Tom AA4VV __ 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
Re: [Elecraft] KPA500 AC power
I’ve wondered the same thing here. While I don’t have the flashing lights that Dennis NJ6G does, I DO have a ton of other things plugged in to outlets in this room. Am I off in left field on this: if the amp were to run on a 220 circuit it would obviously draw half the current, and thus (to my uneducated brain) less current “might” mean less heat generated and a lower temperature inside the unit. Does that make sense? I had an estimate from a licensed electrician who said it would run me about $600 to put a 220 outlet in the shack, due to it’s distance (and obstacles in the way) from the electrical entry panel. Kinda pricy, but eliminating some heat in the shack and keeping the KPA500 fans running slower would be nice…. Jim / W6JHB > On Dec 12, 2018, at 4:13 PM, Tom Berry wrote: > > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > 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 w6...@me.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
Re: [Elecraft] KPA500 AC power
Tom ... I vote yes and did so myself. The amp just loafs along and probably prefers that voltage. However, properly configured at the transformer, it runs fine on 120v which is what I power it when portable for Boy Scout events. At some point you may want a 1500w amp which will definitely need 240v. Might as well do it at today’s electrician rates than tomorrow’s. 73, Kent K9ZTV > On Dec 12, 2018, at 6:13 PM, Tom Berry wrote: > > Is there any advantage to use 220 V over 110 V on the KPA500? > > Is it worth having an electrician come to the house and install a 220 V > outlet for it? > > > Thanks > > Tom AA4VV > > __ > 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 k9...@socket.net > __ 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
Re: [Elecraft] KPA500 AC power
Mine's plugged into 110. Someone could probably copy cw from the flickering lights in my shack. 73, Dennis NJ6G On 12/12/2018 16:13, Tom Berry wrote: Is there any advantage to use 220 V over 110 V on the KPA500? Is it worth having an electrician come to the house and install a 220 V outlet for it? Thanks Tom AA4VV __ 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
Re: [Elecraft] KPA500 AC Power
Bill, There will be less 'light blinking' if operated on 220 volts. The answer all depends on the AC circuit. Is this a dedicated 120 volt receptacle with heavy gauge wire? If so, it will make little difference. But if it is a shared circuit, the voltage drop is a consideration. 73, Don W3FPR On 2/24/2013 9:32 AM, Bill Wiehe wrote: Any advantage to using 220V vs 110V to power the KPA500? I purchased both cables as I plan use the KPA500 in my RV as well as home where I have 220 in the shack. Thanks, __ 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
