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I'm thinking about getting the K2 with the 100 watt amp. This forum is very helpful and maybe I can get some questions answered.
What current does the K2 need at 100 watts? Did I see one is supposed to use 2% silver solder or is 60/40 ok? DE WB4VFN Rich _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Rich, WB4VFN asked:
I'm thinking about getting the K2 with the 100 watt amp. This forum is very helpful and maybe I can get some questions answered. What current does the K2 need at 100 watts? Did I see one is supposed to use 2% silver solder or is 60/40 ok? ---------------------- A supply rated for 20 amps intermittent commercial service (ICS), as recommended by Elecraft, will handle the K2/100 just fine. The actual peak current at 100 watts will vary from about 15 to 18 amps depending upon the band since there are small changes in efficiency. A popular example of a linear supply is the Astron 20A or 20M (M has volt and ammeters). Of course a higher current rating is fine too, and some operators prefer larger supplies so they can run several rigs from one source. Others prefer the redundancy of more than one supply if their total needs grow beyond the capacity of the 20 Amp supply. 60/40 solder is fine. You're starting to see discussion of changes in the solder recommendations as the world moves toward a ban on lead wherever possible, but the old stuff is just fine. Silver-bearing solder is fine too, but it is a bit harder to remove if that's ever needed. Just be sure that whatever you use is clearly marked ROSIN core. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by RICHARD MC KINNEY
Hi
The K2/100 will draw about 15-18 amps depending on the band selected at 100 watts driven into a 50 ohm load. Do not use silver solder it is hard to remove if you make a mistake or when components need to be removed to install options. Silver solder has no advantages in standard through hole PC construction. You should use 60/40 or better 63/37 rosin core solder. Don Brown KD5NDB ----- Original Message ----- From: "RICHARD MC KINNEY" <[hidden email]> To: <[hidden email]> Sent: Saturday, March 11, 2006 1:05 PM Subject: [Elecraft] questions I'm thinking about getting the K2 with the 100 watt amp. This forum is very helpful and maybe I can get some questions answered. What current does the K2 need at 100 watts? Did I see one is supposed to use 2% silver solder or is 60/40 ok? DE WB4VFN Rich _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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And use the finest size you can find. Makes control of the amount of
solder much easier. Mine is 63/37 0.010 and it works great. The only problem is that the solder is fine enough that I sometimes lose the piece on the workbench if I don't set it down in exactly the same place everytime. Fred K6DGW Auburn CA CM98lw Don Brown wrote: > Hi > > The K2/100 will draw about 15-18 amps depending on the band selected at 100 > watts driven into a 50 ohm load. > > Do not use silver solder it is hard to remove if you make a mistake or when > components need to be removed to install options. Silver solder has no > advantages in standard through hole PC construction. You should use 60/40 or > better 63/37 rosin core solder. > > Don Brown > > KD5NDB > > > > > ----- Original Message ----- > From: "RICHARD MC KINNEY" <[hidden email]> > To: <[hidden email]> > Sent: Saturday, March 11, 2006 1:05 PM > Subject: [Elecraft] questions > > > I'm thinking about getting the K2 with the 100 watt amp. This forum is very > helpful and maybe I can get some questions answered. > What current does the K2 need at 100 watts? > Did I see one is supposed to use 2% silver solder or is 60/40 ok? > DE WB4VFN Rich Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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Fred,
You point is well taken, but 0.010 is very fine and it is akin to soldering with a strand of hair. The biggest problem I have with solder that thin is that it is often not stiff enough which slows the soldering process down. I use my 0.010 only for SMD work and use 0.020 for most everything else. The 0.20 is a good compromise for me and I can work well with it. 73, Don W3FPR > -----Original Message----- > > And use the finest size you can find. Makes control of the amount of > solder much easier. Mine is 63/37 0.010 and it works great. The only > problem is that the solder is fine enough that I sometimes lose the > piece on the workbench if I don't set it down in exactly the same place > everytime. > > Fred K6DGW > Auburn CA CM98lw > _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by Ron D'Eau Claire-2
On Sat, 11 Mar 2006 12:16:57 -0800, Ron D'Eau Claire wrote:
>A supply rated for 20 amps intermittent commercial service (ICS), as >recommended by Elecraft, will handle the K2/100 just fine. The actual peak >current at 100 watts will vary from about 15 to 18 amps depending upon the >band since there are small changes in efficiency. A popular example of a >linear supply is the Astron 20A or 20M (M has volt and ammeters). Of course >a higher current rating is fine too, and some operators prefer larger >supplies so they can run several rigs from one source. Others prefer the >redundancy of more than one supply if their total needs grow beyond the >capacity of the 20 Amp supply. On that theme, Ron.... I have plenty of capacity (45 A supply, Group 31 battery) but my 12V distribution panel has two BlueSeas breakers (UL/USCG rated) available - one at 30A and one at 15A. In your not-so-humble opinion, which would be better for hooking up the K2/100 directly? I really don't want to tear apart the distribution panel to put in a 20A breaker if I can avoid it. I would be running the rig for SSB, data, and a little CW (call me Philistine!!) but rarely at full power. -- 73 de K2ASP - Phil Kane From a Clearing in the Silicon Forest Beaverton (Washington County) Oregon _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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In reply to this post by RICHARD MC KINNEY
Phil K2ASP wrote:
I have plenty of capacity (45 A supply, Group 31 battery) but my 12V distribution panel has two BlueSeas breakers (UL/USCG rated) available - one at 30A and one at 15A. In your not-so-humble opinion, which would be better for hooking up the K2/100 directly? I really don't want to tear apart the distribution panel to put in a 20A breaker if I can avoid it. I would be running the rig for SSB, data, and a little CW (call me Philistine!!) but rarely at full power. ---------------------------- I'd use the 30 A circuit but leave the in-line 20A fuse Elecraft provides in the power cable to the K2/100. It'll let go ONLY in the event of a serious short (I've not lost one yet in several years of running the KPA100) and provides direct protection to both your power panel and the rig. Depending upon how sensitive that 15 A breaker is, you might get away with using the 15 Amp circuit. Breakers, like everything else, have tolerances and you may find that one will handle as much as 20 A just fine, especially intermittently such as you running the K2/100 in CW or SSB modes. Of course, you'll not draw anything near the peak on data. You need to significantly de-rate the amp for continuous-carrier modes. That will drop the current drain considerably. OTOH, that breaker may show a maddening tendency to decide it's had enough and open at exactly the wrong moment. That's why I'd use the fuse and connect to the higher-current circuit breaker. Ron AC7AC _______________________________________________ Elecraft mailing list Post to: [hidden email] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com |
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