XV50, XV144, XV222 Assembly Manual
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XV50, XV144, XV222 Assembly Manual
 
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I have just been reading the Transverter XV50, XV144, XV222 Assembly
Manual Rev B, March 2006 and notice on page 2 that the top cover has ventilation holes drilled in it. My XV144 does not have any ventilation holes. Should I drill some vent holes in the top cover, over the four metal-oxide resistors? My XV144 does get hot and sometimes trips out if I transmit more than a few minutes. (Presumably F1, the resettable fuse.) As there is space on the RF Board for a fan, similar to that used on the XV432, I am wondering whether there would be any advantage fitting a 40mm x 40mm fan to the XV144? Presumably, I would need to drill air-flow holes in the PCB and also in the bottom cover. 73 -- David G4DMP Leeds, England, UK ------ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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On Sat, 12 Dec 2009 20:01:45 +0000, David Pratt
<[hidden email]> wrote: >I have just been reading the Transverter XV50, XV144, XV222 Assembly >Manual Rev B, March 2006 and notice on page 2 that the top cover has >ventilation holes drilled in it. My XV144 does not have any ventilation >holes. > >Should I drill some vent holes in the top cover, over the four >metal-oxide resistors? My XV144 does get hot and sometimes trips out if >I transmit more than a few minutes. (Presumably F1, the resettable >fuse.) > >As there is space on the RF Board for a fan, similar to that used on the >XV432, I am wondering whether there would be any advantage fitting a >40mm x 40mm fan to the XV144? Presumably, I would need to drill >air-flow holes in the PCB and also in the bottom cover. > >73 No need to drill the holes or get a fan for any of the other XV Models. They don't get hot like the XV432 does. Tom, N5GE [hidden email] K3 #806 with SUB RX, K3 #1055, PR6, XV144, XV432, KRC2, W1, 2 W2's and other small kits 1 K144XV on order http://www.n5ge.com http://www.swotrc.net ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Amateur Radio Operator N5GE
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Re: XV50, XV144, XV222 Assembly Manual
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I'm not so sure about this, at least for the holes.
My old XV144 have them since it came out of the factory..., Maybe it is a simple packing mistake. Try ask to elecraft support, maybe they can clear it out. 73 de Giulio IW3HVB > No need to drill the holes or get a fan for any of the other XV > Models. They don't get hot like the XV432 does. > > ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: XV50, XV144, XV222 Assembly Manual
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In reply to this post by David Pratt
David,
The holes only vent the attenuators, the heat sink for the output module is the bottom plate. Whether the attenuators need venting or not depends on your drive level - the attenuators are not used at all for 1 mW input, so if that is what you are using, rest easy. I am curious about why your top cover does not have the holes. It is possible that you received an incorrect cover. If this was a recent purchase, things like that are covered under warranty, contact [hidden email] with a brief explanation and you may receive the right cover. 73, Don W3FPR David Pratt wrote: > I have just been reading the Transverter XV50, XV144, XV222 Assembly > Manual Rev B, March 2006 and notice on page 2 that the top cover has > ventilation holes drilled in it. My XV144 does not have any ventilation > holes. > > Should I drill some vent holes in the top cover, over the four > metal-oxide resistors? My XV144 does get hot and sometimes trips out if > I transmit more than a few minutes. (Presumably F1, the resettable > fuse.) > > As there is space on the RF Board for a fan, similar to that used on the > XV432, I am wondering whether there would be any advantage fitting a > 40mm x 40mm fan to the XV144? Presumably, I would need to drill > air-flow holes in the PCB and also in the bottom cover. > > 73 > > ------------------------------------------------------------------------ > > > No virus found in this incoming message. > Checked by AVG - www.avg.com > Version: 9.0.716 / Virus Database: 270.14.104/2560 - Release Date: 12/12/09 02:38:00 > > Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re： XV50, XV144, XV222 Assembly Manual
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In reply to this post by David Pratt
Hello David,
I think some group members have already answered your question about vent holes. According to the manual, it should operate at either 20w SSB/CW or 10w FM fully duty cycle. Even you operate at 10W FM, the case is still extremely hot. As mentioned in this reflector many times, XV144 is very good but not cheap. It is a waste if it can only operate in low duty cycle mode and become extremely hot under 10W FM. Therefore, I modified it with reference to XV432 with an additional small fan inside and drill additional holes in the PCB. Some of the group members replied to me on the heat issues off the list with variety of suggestions. In conclusion, if XV144 is operated at FM mode even at the specified 10 watt, it is very hot. I wrote my product review in www.eham.net 73 Johnny VR2XMC ----- 郵件原件 ---- 寄件人﹕ David Pratt <[hidden email]> 收件人﹕ Elecraft Reflector <[hidden email]> 傳送日期﹕ 2009/12/13 (日) 4:01:45 AM 主題： [Elecraft] XV50, XV144, XV222 Assembly Manual I have just been reading the Transverter XV50, XV144, XV222 Assembly Manual Rev B, March 2006 and notice on page 2 that the top cover has ventilation holes drilled in it. My XV144 does not have any ventilation holes. Should I drill some vent holes in the top cover, over the four metal-oxide resistors? My XV144 does get hot and sometimes trips out if I transmit more than a few minutes. (Presumably F1, the resettable fuse.) As there is space on the RF Board for a fan, similar to that used on the XV432, I am wondering whether there would be any advantage fitting a 40mm x 40mm fan to the XV144? Presumably, I would need to drill air-flow holes in the PCB and also in the bottom cover. 73 -- David G4DMP Leeds, England, UK ------ Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo.yahoo.com/security/ 了解更多! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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In reply to this post by Giulio Pico - IW3HVB
On Sat, 12 Dec 2009 22:39:28 +0100, Giulio Pico - IW3HVB
<[hidden email]> wrote: I guess my XV144 doesn't get hot because I drive it with 1mw. There are holes in it above the attenuation resistors. 73, Tom, N5GE [hidden email] K3 #806 with SUB RX, K3 #1055, PR6, XV144, XV432, KRC2, W1, 2 W2's and other small kits 1 K144XV on order http://www.n5ge.com http://www.swotrc.net >I'm not so sure about this, at least for the holes. >My old XV144 have them since it came out of the factory..., >Maybe it is a simple packing mistake. >Try ask to elecraft support, maybe they can clear it out. > >73 de Giulio IW3HVB >> No need to drill the holes or get a fan for any of the other XV >> Models. They don't get hot like the XV432 does. >> >> > >______________________________________________________________ >Elecraft mailing list >Home: http://mailman.qth.net/mailman/listinfo/elecraft >Help: http://mailman.qth.net/mmfaq.htm >Post: mailto:[hidden email] > >This list hosted by: http://www.qsl.net >Please help support this email list: http://www.qsl.net/donate.html ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
Amateur Radio Operator N5GE
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Re： XV50, XV144, XV222 Assembly Manual
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The heat is NOT quite generated from the 3 x 160 ohms attenuation resistors.
It does come from the heat dissipation from the RF power module RA30H1317M when operating under Elecraft published specifications i.e. 20w SSB/CW or 10w continous carrier modes e.g. FM. 73 Johnny Siu VR2XMC ----- 郵件原件 ---- 寄件人﹕ Radio Amateur N5GE <[hidden email]> 收件人﹕ Elecraft Reflector <[hidden email]> 傳送日期﹕ 2009/12/13 (日) 2:31:22 PM 主題： Re: [Elecraft] XV50, XV144, XV222 Assembly Manual On Sat, 12 Dec 2009 22:39:28 +0100, Giulio Pico - IW3HVB <[hidden email]> wrote: I guess my XV144 doesn't get hot because I drive it with 1mw. There are holes in it above the attenuation resistors. 73, Tom, N5GE [hidden email] K3 #806 with SUB RX, K3 #1055, PR6, XV144, XV432, KRC2, W1, 2 W2's and other small kits 1 K144XV on order http://www.n5ge.com http://www.swotrc.net >I'm not so sure about this, at least for the holes. >My old XV144 have them since it came out of the factory..., >Maybe it is a simple packing mistake. >Try ask to elecraft support, maybe they can clear it out. > >73 de Giulio IW3HVB >> No need to drill the holes or get a fan for any of the other XV >> Models. They don't get hot like the XV432 does. Yahoo!香港提供網上安全攻略，教你如何防範黑客! 請前往 http://hk.promo.yahoo.com/security/ 了解更多! ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
Re: XV50, XV144, XV222 Assembly Manual
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In reply to this post by Don Wilhelm-4
It's a fairly early purchase, Don, and has a steel top cover with no
vent holes. It is a pity that the XV--- transverters do not have serial numbers so they can be identified. I will drill 30 holes in the area of the Metox resistors. In a recent message, Don Wilhelm <[hidden email]> wrote ... >I am curious about why your top cover does not have the holes. It is >possible that you received an incorrect cover. If this was a recent >purchase, things like that are covered under warranty, contact >[hidden email] with a brief explanation and you may receive the >right cover. 73 David -- David G4DMP Leeds, England, UK ------ ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[hidden email] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html |
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