Be sure the electrolytics are fully discharged before you touch anything inside. They can retain a high enough charge to give you a serious jolt. In a lot of power supplies, the electrolytics have a "bleeder" resistor across them, to drain down that charge within a minute or so after the unit is turned off. But you're working in old equipment where things may have been modified and/or broken. A few years ago I bought an old transmitter with separate power supply at a hamfest. The seller assured me it was all in working condition. I think I would have been killed if I'd relied on that bit of "puffery." But W1ES is right -- they're pretty straightforward, and you shouldn't have any trouble figuring out what's what or working on it. Just be sure to respect the voltages that it's capable of. --Art Delibert, KB3FJO From: [email protected] To: [email protected] Date: Fri, 24 Aug 2012 16:03:54 +0000 Subject: Re: [Drakelist] Exploding cap's ??? Wow, thank you so much to all for the most useful information. Yes the AC4 is wired for 240 v. Hoped to string up some sort of temporary antenna this weekend and get on the air but I now know I will be busy doing something else! Just hope I have the technical abilty to sort it out. Years ago I built a Heathkit scope but that is about my only experience with components, soldering etc. I do not suppose any Drake enthusiast will have any doubt as to why a TR4 but in case anybody has, in the late 60's and early 70's when I was active I had three receivers in a row, the last being a R4A. I thought it was magnificent and way ahead of any receiver I had tried at the time. Wish I still had it today. It is only natural that I want to return to Drake. Thanks again everyone. Damien G3XER _______________________________________________ Drakelist mailing list [email protected] http://mailman.zerobeat.net/mailman/listinfo/drakelist
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