Re: [Elecraft] KPA100 fan test
Mike, Is the underline cursor under the ON in the PA ON menu? It must be. To set up to Edit the menu parameter, you must hold the EDIT button, and the cursor will move to the right. Once it is there, tap the DISPLAY button to cycle through the fan modes. 73, Don W3FPR On 11/14/2010 5:37 PM, Mike Weir wrote: I have checked out just fine up until the fan test on page 49 of the assembly manual. I set the power control to above 11 watts now to edit the PA menu I get to the point were the display on the k3 reads PAON If I tap the display button I am not getting to the fan setup menu. I know I am doing something wrong with button pushing or something but just not sure what. In the manual it tells me to Edit the PA menu parameter I seem to be tapping menu and then tapping display to get to the secondary menu but when I get to PA I just can't get to the fan control options to do the fan test. Mike VE3WDM http://ve3wdm.blogspot.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
Re: [Elecraft] KPA100 fan test
Thanks very much DonWeird thought that was what I was doing but seems not. I did as you said and all checked out with the fan speed just fine. Now it is on the the Bias currant adjustment going to use an DMM for this oneI have a Fluke that can be configured for 10 amps the other options is only 400ma rated. Thanks Don -- View this message in context: http://elecraft.365791.n2.nabble.com/KPA100-fan-test-tp5738497p5738538.html Sent from the Elecraft mailing list archive at Nabble.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
Re: [Elecraft] KPA100 fan test
I'm not sure what you are looking at Mike. The K3 Assembly manual has nothing about the fans on page 49. Testing the fans is covered on page 14 of the KPA3 option manual, as follows: Press the POWER button to turn the K3 on. Hold CONFIG to select the Configuration menu, then turn VFO B to KPA3. Turn the VFO A knob to PAIO ON, then turn it further to PAIO TST. When moving between ON and TST, you should hear a relay click on the KPAIO3 board. If you don't, press the K3 POWER button to switch it off, then on again and retry the test. Turn the VFO A knob on past TST to FN1, then FN2, FN3 and FN4. The fans should start turning at FN1 and increase speed as you continue to FN4. 73, Ron AC7AC -Original Message- I have checked out just fine up until the fan test on page 49 of the assembly manual. I set the power control to above 11 watts now to edit the PA menu I get to the point were the display on the k3 reads PAON If I tap the display button I am not getting to the fan setup menu. I know I am doing something wrong with button pushing or something but just not sure what. In the manual it tells me to Edit the PA menu parameter I seem to be tapping menu and then tapping display to get to the secondary menu but when I get to PA I just can't get to the fan control options to do the fan test. Mike VE3WDM http://ve3wdm.blogspot.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
Re: [Elecraft] KPA100 fan test
Mike, Use the Fluke. You will have to measure about 1 amp. Do it just like the manual says. You will probably have to make several trials until you get it right. The current rises quickly, and with a digital display, the first reading flashed is not valid, so wait until the 2nd or 3rd update from the Fluke. Hint - if typical, the adjustment pot will end up at about 1/3 rotation from fully counter-clockwise. 73, Don W3FPR On 11/14/2010 5:58 PM, VE3WDM wrote: Thanks very much DonWeird thought that was what I was doing but seems not. I did as you said and all checked out with the fan speed just fine. Now it is on the the Bias currant adjustment going to use an DMM for this oneI have a Fluke that can be configured for 10 amps the other options is only 400ma rated. Thanks Don __ 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
RE: [Elecraft] KPA100 Fan direction?
Jeff, The fan moves air into the PA and it exhausts between the heat sink fins behind the KPA100 front cover at the top. 73, Don W3FPR -Original Message- Hey Folks, got the KPA100 done tonight, full power on all bands, woohoo! One question, is the fan supposed to blow IN or OUT of the chassis? I saw the same question in the archives but no answer... Thanks! -J -- No virus found in this outgoing message. Checked by AVG Free Edition. Version: 7.5.441 / Virus Database: 268.17.39/687 - Release Date: 2/14/2007 4:17 PM ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] KPA100 Fan
I can't speak to the issue of the fan not coming on, but I can offer some experience with a hot heat sink. A few years ago I used my K2/100 to test the temperature compensation mods during which the heat sink became too hot to hold my hand on it. The internal air temperature of the K2 was around 50C/122F (monitored by a probe) with the fan running. No ill effects resulted. It's designed for that sort of thing. Ron AC7AC -Original Message- Hi, Yesterday I participated with my K2/100 in the Pike Special Event station here in Colorado Springs, Colorado. It was in observance of Zebulon Pike's bicentennial discovery of Pikes Peak. We were in a terrible location in a downtown valley with antenna restrictions imposed by the city Parks and Recreation department as the trees are older than the bicentennial. Propagation on 20 meters was very bad from our perspective. Now to my point. We were outside in 90 degree plus temps for over four hours. We were running PSK31 and SSB. PSK was kept below 25 watts. The fan on the KPA100 did not come on the entire time. I had it set for LoHi in the KPA100 menu. So it should have at least been on low speed all the time. The heat sink got very hotalmost too hot to touch. A couple time I though I smelled hot electronics. The PA HOT message never appeared. To add complications when I got home it worked as advertised in my cool basement. I did find the temperature calibration was set at 11 degrees centigrade (51 degrees f). Must have set it during the winter when the basement gets chilly. I reset it to 23 degrees centigrade. (71 f). Does anyone know of any mystery problems or other legacy fan problems with the KPA100? In a couple weeks I plan to disassemble it and have a look after I finish another K2 for an acquantance. The schematic nor circuit description does not address the fan itself as I can find. There is a T sense circuit but how the fan ties in is not shown as I can find. Your comments and thoughts will be very welcomed. Jim, AB0UK K2/100 S/N 4787 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
RE: [Elecraft] KPA100 Fan
Jim, The fact that you had the TPA parameter set to 11 degrees would explain the fan not coming on even with high heat sink temperatures - the firmware did not know just how hot the heat sink actually was because it was not properly calibrated. The temperature displayed in the TPA setting should always be the current temperature of the heat sink. The manual instructions indicating that it should be set to the ambient temperature is correct - provided that the heat sink has had enough time to aclimate to the surrounding temperature. If you need more proof of that, set the TPA parameter as described in the manual (after the KPA100 has been powered off for about 2 hours), and then transmit for a while. Afterwards, check the TPA parameter - it will have gone up to the temperature of the heat sink. IMHO, what the manual fails to make clear enough is the fact that the heat sink should be allowed to reach the temperature of the ambient air before you set the TPA parameter to the temperature of the ambient air. There is a temperature probe on the KPA100 - it is Q3 which is in contact with the heat sink. The firmware does the calculation of when to activate the fan based on your initial setting of the TPA parameter and the current temperature of the heat sink. I am not certain just what the trip point temperatures are - one could easily check by observing the TPA value at the time the fan turns on. It would be a good idea to check the TPA setting before using the KPA100 in high temperature environments. 73, Don W3FPR -Original Message- Yesterday I participated with my K2/100 in the Pike Special Event station here in Colorado Springs, Colorado. It was in observance of Zebulon Pike's bicentennial discovery of Pikes Peak. We were in a terrible location in a downtown valley with antenna restrictions imposed by the city Parks and Recreation department as the trees are older than the bicentennial. Propagation on 20 meters was very bad from our perspective. Now to my point. We were outside in 90 degree plus temps for over four hours. We were running PSK31 and SSB. PSK was kept below 25 watts. The fan on the KPA100 did not come on the entire time. I had it set for LoHi in the KPA100 menu. So it should have at least been on low speed all the time. The heat sink got very hotalmost too hot to touch. A couple time I though I smelled hot electronics. The PA HOT message never appeared. To add complications when I got home it worked as advertised in my cool basement. I did find the temperature calibration was set at 11 degrees centigrade (51 degrees f). Must have set it during the winter when the basement gets chilly. I reset it to 23 degrees centigrade. (71 f). Does anyone know of any mystery problems or other legacy fan problems with the KPA100? In a couple weeks I plan to disassemble it and have a look after I finish another K2 for an acquantance. The schematic nor circuit description does not address the fan itself as I can find. There is a T sense circuit but how the fan ties in is not shown as I can find. Your comments and thoughts will be very welcomed. ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
Re: [Elecraft] KPA100 Fan Noise
Ball bearing and similar fans have a longer life with quiet than sleeve bearing fans. You might check out the offerings from Mouser in small fans. -Stuart ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
Re: [Elecraft] KPA100 Fan Issue
Found my probelm...can't follow directions! - Original Message - From: Bob Wehking [EMAIL PROTECTED] To: Elecraft@mailman.qth.net Sent: Tuesday, September 20, 2005 1:40 PM Subject: [Elecraft] KPA100 Fan Issue I have progressed to page 46 when I go to the PA menu parameter, I see Off, on, F1.10 E, but never see the Fan nor. Does anyone have an idea what I am doing wrong or do I have a hardware problem? Bob WB8DDI K2 #4998 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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 -- No virus found in this incoming message. Checked by AVG Anti-Virus. Version: 7.0.344 / Virus Database: 267.11.1/104 - Release Date: 9/16/2005 ___ Elecraft mailing list Post to: Elecraft@mailman.qth.net 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
