K2/100 burn-in
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Well I just gave my KPA-100 a workout on 10M. I set the rig at 27WPM 100W with a 20 second CQ (3 CQ's + 2 callsigns sent twice) with a 4 second pause in auto repeat message mode.
I did not get an answer in the 30 minutes that I called but I also did not get any Hi Temp warning. The heatsink does get quite warm and with the 5:1 ratio on TX heat vs RX cool off time I might have been exceeding Elecraft's concept of intermittant amateur service. If I used the K2 as the CQ machine on 10M while looking for QSO's on another band I think I'd put a fan on the K2 for peace of mind if not necessity. Has anyone really hammered their K2/100 with high CQ or QSO rates for a 24 hour period without a secondary fan? I'd be curious how it held up and were you successful in cooking eggs on it? It might make a good George Forman portable contest grill. It reminds me of the old QST ad (Alpha?) showing their amp putting out a KW with a brick on the key and each month they'd update the numbers to show it was still going strong after X hours. My K2 is now going to take the seat of honor below my Orion as my primary rig. The Orion I prefer for SSB (mainly because the VOX works so much better) but there is NOTHING that I've pulled out of the noise and QRM with the Orion set for 100Hz bandwidth that I couldn't copy as well (and at times more comfortably) on the K2. 73 de Tom K2TA _______________________________________________ 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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Hi Tom,
I had my K2/100 driving an Alpha 87A at WP2Z for ARRL SSB test. The K2 got quite hot and the fan ran a lot. But no ill effects other than keep your hands off the cooling fins. N2TK, Tony -----Original Message----- From: [hidden email] [mailto:[hidden email]]On Behalf Of Tom Althoff Sent: Wednesday, December 01, 2004 1:15 PM To: Elecraft Subject: [Elecraft] K2/100 burn-in Well I just gave my KPA-100 a workout on 10M. I set the rig at 27WPM 100W with a 20 second CQ (3 CQ's + 2 callsigns sent twice) with a 4 second pause in auto repeat message mode. I did not get an answer in the 30 minutes that I called but I also did not get any Hi Temp warning. The heatsink does get quite warm and with the 5:1 ratio on TX heat vs RX cool off time I might have been exceeding Elecraft's concept of intermittant amateur service. If I used the K2 as the CQ machine on 10M while looking for QSO's on another band I think I'd put a fan on the K2 for peace of mind if not necessity. Has anyone really hammered their K2/100 with high CQ or QSO rates for a 24 hour period without a secondary fan? I'd be curious how it held up and were you successful in cooking eggs on it? It might make a good George Forman portable contest grill. It reminds me of the old QST ad (Alpha?) showing their amp putting out a KW with a brick on the key and each month they'd update the numbers to show it was still going strong after X hours. My K2 is now going to take the seat of honor below my Orion as my primary rig. The Orion I prefer for SSB (mainly because the VOX works so much better) but there is NOTHING that I've pulled out of the noise and QRM with the Orion set for 100Hz bandwidth that I couldn't copy as well (and at times more comfortably) on the K2. 73 de Tom K2TA _______________________________________________ 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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In reply to this post by Tom Althoff
I never had a problem, but remember to double-check the finals mounting
hardware. NRE/COLE Test Center OH-3 pcarter<at>gcfn.org or wd8qwr<at>arrl.net Philip L. Carter, WD8QWR wd8qwr@w8cqk.#cmh.oh.usa.na _______________________________________________ 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 Tom Althoff
At 10:14 AM 12/1/2004, Tom Althoff wrote:
>I did not get an answer in the 30 minutes that I called but I also did not get any Hi Temp warning. The heatsink does get quite warm and with the 5:1 ratio on TX heat vs RX cool off time I might have been exceeding Elecraft's concept of intermittant amateur service. If I used the K2 as the CQ machine on 10M while looking for QSO's on another band I think I'd put a fan on the K2 for peace of mind if not necessity. > >Has anyone really hammered their K2/100 with high CQ or QSO rates for a 24 hour period without a secondary fan? I'd be curious how it held up and were you successful in cooking eggs on it? It might make a good George Forman portable contest grill. I run RTTY on my K2/100 on occasion - this gets it quite warm, even at the 40W spec - I use a 12V fan right on the heat sink and it stays nice and cool even during a contest - if you want to be sure, use a fan. why risk it? hope this helps - jeff wk6i -- Jeff Stai [hidden email] Twisted Oak Winery http://www.twistedoak.com/ Rocketry Org. of CA http://www.rocstock.org/ Amateur Radio WK6I _______________________________________________ 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 Tom Althoff
K2TA asked:
>Has anyone really hammered their K2/100 with high CQ or QSO rates for a 24 >hour period without a secondary fan? I'd be curious how it held up and >were you successful in cooking eggs on it? It might make a good George >Forman portable contest grill. http://www.ac6rm.net/mailarchive/html/elecraft-list/2003-07/msg00508.html 73, VR2BrettGraham _______________________________________________ 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 Tom Althoff
On Dec 1, 2004, at 1:14 PM, Tom Althoff wrote: > Has anyone really hammered their K2/100 with high CQ or QSO rates for > a 24 hour period without a secondary fan? I'd be curious how it held > up and were you successful in cooking eggs on it? On CW, I've run for a couple of hours at a time at the 100 watt level. The top gets very hot, but not so hot you can't place your hand on top of the heat sink. It's uncomfortable, but not painful. On SSB, the heat sink gets very warm, but not quite so hot as CW after running a couple of hours. In both cases, the fan runs continuously. Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 _______________________________________________ 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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When I use the K2/100 to drive an amp in a contest, CW or SSB, I can't keep
my hand on the heat sink. Running about 40-50w to drive the amp. Fan on K2/100 runs continuously when running stations. There doesn't seem to be any ill effects. N2TK, Tony -----Original Message----- From: [hidden email] [mailto:[hidden email]]On Behalf Of Bill Coleman Sent: Tuesday, December 21, 2004 10:37 PM To: Tom Althoff Cc: Elecraft Subject: Re: [Elecraft] K2/100 burn-in On Dec 1, 2004, at 1:14 PM, Tom Althoff wrote: > Has anyone really hammered their K2/100 with high CQ or QSO rates for > a 24 hour period without a secondary fan? I'd be curious how it held > up and were you successful in cooking eggs on it? On CW, I've run for a couple of hours at a time at the 100 watt level. The top gets very hot, but not so hot you can't place your hand on top of the heat sink. It's uncomfortable, but not painful. On SSB, the heat sink gets very warm, but not quite so hot as CW after running a couple of hours. In both cases, the fan runs continuously. Bill Coleman, AA4LR, PP-ASEL Mail: [hidden email] Quote: "Not within a thousand years will man ever fly!" -- Wilbur Wright, 1901 _______________________________________________ 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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In reply to this post by Bill Coleman-2
Bill Coleman wrote: > > On Dec 1, 2004, at 1:14 PM, Tom Althoff wrote: > >> Has anyone really hammered their K2/100 with high CQ or QSO rates for >> a 24 hour period without a secondary fan? I'd be curious how it >> held up and were you successful in cooking eggs on it? > > > On CW, I've run for a couple of hours at a time at the 100 watt level. We used my K2/100 for the run station in CQ WW CW from Labrador .... Lots of 140+ hours - the heatsink got hot, the eggs (we did omelets!!) had a nice pattern in them from the heatsink fins! Actually the heat sink got hot .... not burning hot. Sunday I did turn the fan on high, but I don't think it was really necessary. The hams in Labrador City were impressed with the K2 and the fact that we would bring one for the run station! 73 and Happy Holidays! Hank K8DD _______________________________________________ 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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