tag:blogger.com,1999:blog-1600168055170234742.post3059862356887724335..comments2022-04-10T15:42:41.034-07:00Comments on Amateur Radio Station WD9N: Amp Supply Company LK-500ZC RebuildDavidhttp://www.blogger.com/profile/04401878793978448473noreply@blogger.comBlogger8125tag:blogger.com,1999:blog-1600168055170234742.post-91167875235738368782014-01-08T16:52:07.594-08:002014-01-08T16:52:07.594-08:00Well, sorry for the long delay. I have sold the Z...Well, sorry for the long delay. I have sold the ZC chassis because I acquired a ZA that looks way better than the newer ZC chassis. I robbed parts from the ZC to put the ZA in taop shape. Another ham purchased the ZC chassis to use as a project to convert to the GI7B Russian tubes. The tank circuit and PS are in place for him, so all he needs to do is get the tubes to fit. As for the Davidhttps://www.blogger.com/profile/04401878793978448473noreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-67592922142061074532013-07-29T11:35:53.296-07:002013-07-29T11:35:53.296-07:00Yes David those are the ones. The ones I smoked lo...Yes David those are the ones. The ones I smoked look like they are under the inductor but I was in the 80 meter slot on the band switch when it happened. I bought this amp new in 1987 so I guess it's about time to change them all since some of those let go. <br />Thanks, <br />Gary - N5KDAGaryhttp://bellsouthpwp.net/n/5/n5kda/ham.htmlnoreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-90320558565692130142013-07-28T08:23:02.787-07:002013-07-28T08:23:02.787-07:00Gary, I do not know right off, but check back and ...Gary, I do not know right off, but check back and I will try and get the value and post in the comments.<br /><br />Just to be sure, you are talking about the group of paralleled caps near the band switch in the tank circuit. If that is so, they are used as a lumped value in parallel that is switched in as additional padding for the air variable caps. These are used for the 3.5 MHz position if Davidhttps://www.blogger.com/profile/04401878793978448473noreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-64387675044445979942013-07-27T12:51:12.304-07:002013-07-27T12:51:12.304-07:00In the 1st pick, those red caps rated at 12KV, can...In the 1st pick, those red caps rated at 12KV, can you tell me the value on the caps? I need to replace some and the value is "smoked" off.<br />Thanks,<br />N5KDAGary - N5KDAhttp://bellsouthpwp.net/n/5/n5kda/ham.htmlnoreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-60838712611305198522013-05-15T07:52:10.783-07:002013-05-15T07:52:10.783-07:00Julio, I don't really remember how it was done...Julio, I don't really remember how it was done. It was in that condition when I acquired the amp.<br /><br />I did manage to get the rebuild almost finished when I purchased another LK-500ZA. The ZA looked nicer to me so I ended up robbing parts from the ZC to put the ZA chassis in top shape. I sold the ZC chassis with the rebuilt bandswitch and air variable to a local ham who is in the Davidhttps://www.blogger.com/profile/04401878793978448473noreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-25980593160511992432012-12-02T03:54:44.696-08:002012-12-02T03:54:44.696-08:00Hi David,
I have problems with ALO as well. How d...Hi David,<br /><br />I have problems with ALO as well. How do you bypassed it?<br />Thanks for the help.<br /><br />73 de Julio EA4KRAnonymousnoreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-72234973858151789362011-12-19T08:29:52.673-08:002011-12-19T08:29:52.673-08:00Hi David, hope you get this. I just acquired an LK...Hi David, hope you get this. I just acquired an LK500-ZC. In going through it I notice it has a fuse block in series with the B+ just before the plate choke, mounted on tube socket board just in front of fan. I'm new to amps, but noticed the fuse after it blew. Puzzled about a 2A 250V fuse on a 3kV line. Your rebuild looks beautiful, so I thought you might have some insight on this. Thanks, Bill Kulze W2NVDnoreply@blogger.comtag:blogger.com,1999:blog-1600168055170234742.post-3101850871392843912011-11-11T07:22:22.511-08:002011-11-11T07:22:22.511-08:0011/11/11:
SO HOW DID THE PROJECT GO? CURIOUS ANY S...11/11/11:<br />SO HOW DID THE PROJECT GO? CURIOUS ANY SUGGESTIONS ON HOW TO GO WITH ADDING 10M TO ONE OF THESE. <br /><br />RICH, K0ZX 303-901-5100RICHnoreply@blogger.com