Hello Mike, You are probably correct. XV432 had had problems in power and frequency stability. However, with the evolution of time, elecraft has found out the ways to solve the problems. I experienced similar problems in XV144 though not so serious as XV432
TNX & 73, Johnny VR2XMC ________________________________ 寄件人︰ M Cresap <m.cre...@yahoo.com> 收件人︰ Tom Warren <mtn...@hartcom.net> 副本(CC)︰ elecraft@mailman.qth.net 傳送日期︰ 2013年02月5日 (週二) 9:21 AM 主題︰ Re: [Elecraft] XV432 - No intermediate pwr output I had a similar problem with my XV432. I was able to chase the problem to the tx driver stage. The fix was to add ground vias from the top to the bottom of the board in a few judicious places. I passed this info back to Gary at Elecraft. I know of at least one other XV432 that has been stabilized by this method. I don't see those mods in the latest XV432 errata sheet, perhaps they vias have been added to the latest circuit board or they have found other ways to cure the problem.73, Mike, W3IP --- On Mon, 2/4/13, Tom Warren <mtn...@hartcom.net> wrote: From: Tom Warren <mtn...@hartcom.net> Subject: [Elecraft] XV432 - No intermediate pwr output To: elecraft@mailman.qth.net Date: Monday, February 4, 2013, 8:15 PM I purchased this unit used ( nice workmanship) and it seems to work well in all respects except as noted below. I must add that the prior owner told me up front that there was an issue with its power. However, when I first put it online line it seemed to work ok. Originally I used it with my K2/100 to drive a Mirage D1010 (100w) in ssb mode. As time passed, the unit started to show signs of loss of power similar to a high swr turn back or high heat shutoff and I attributed it to a failing relay in the Mirage, which I cleaned and the system seemed to again work ok for a while. After a reoccurrence, I switched to another rig for my 432 activities and let the XV432 sit on the shelf while I mulled the issue. I now have a Flex 5000 online and in the process of interfacing the XV432 with good results except for the old issue again and I'm determined to figure out the problem since it really seems to be the transverter and not the K2 or Mirage. The setup; Flex 5000 Single coax interface RCA keyline XV432 Bird 43 (25W slug) Bird dummy load Here's what I've found; 1) As I start the Flexs' drive, the XV432 output turns on at 0w then continues to increase to 2.5w then 'shuts off' and power drops to 0. 2) As I continue to increase the drive, the output power again turns on at about 15w and increases to 20w +. I've looked all over the internet for a similar problem but don't find anything. Maybe someone out there can point me in the right direction before really hitting the books and at my age gray matter is in short supply ;0). Thanks in advance for any help. 73 Tom W4TMW ______________________________________________________________ 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
