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3-15s [message #8374] Sat, 10 March 2007 10:08   serabul Messages: 10 Registered: March 2007 Location: home Junior Member would anyone now the ohms of the cts 3-15s also who built the cst speakers ? thanks steve Report message to a moderator

Re: 3-15s [message #8375 is a reply to message #8374] Sat, 10 March 2007 11:40 rodak Messages: 511 Registered: October 2001 Location: Georgia Senior Member I think the speakers were 16 ohms each, wired in parallel, for a total impedance of 5.3ohms. Not really enough to allow the K200 heads to put out their full power. Not to mention, the 3-15 cabs weren't really big enough. But they make up for it in sheer coolness. www.combo-organ.com Report message to a moderator

Re: 3-15s [message #8395 is a reply to message #8374] Mon, 12 March 2007 06:37   stevem Messages: 4733 Registered: June 2004 Location: NY Senior Member Hi, The CTS drivers where made by CTS" chicago telephone supply" The added sound pressure level that the 3rd 15" driver adds more than makes up for the slight loss in output wattage due to the 5.3 ohm impeadance, and the cabinet being a bit on the small side for 3-15s rolls off the fundimental frequency of the bass strings to give a more even output. The 2-15 cabinet will go down lower if the bass you use is a 5 string. Report message to a moderator

Re: 3-15s [message #8396 is a reply to message #8374] Mon, 12 March 2007 06:38   stevem Messages: 4733 Registered: June 2004 Location: NY Senior Member And the COOLNESS factor does count for a lot! Report message to a moderator

Re: 3-15s [message #8403 is a reply to message #8396] Mon, 12 March 2007 11:24   serabul Messages: 10 Registered: March 2007 Location: home Junior Member I hope that I can get the head working i'm not to sure how to check the out put resisters. If you might know some where to look I was also wondering if the transistors could be checkd in yhe board I purchased the schamatic the other day but not here yet cant wait thanks for the answer on the speakers love em thanks serabul Report message to a moderator

Re: 3-15s [message #8423 is a reply to message #8374] Tue, 13 March 2007 06:36   stevem Messages: 4733 Registered: June 2004 Location: NY Senior Member If you do not know how to test a transistor than it may be best to take the amp to a repair tech, or buy a repair book on solid state trouble shooting and learn how. Their are transistor testers you can buy that will test them in circuit but that is not always possible so it is best most times to take them out of the circuit to confirm there state. Report message to a moderator

Re: 3-15s [message #8424 is a reply to message #8374] Tue, 13 March 2007 06:42   stevem Messages: 4733 Registered: June 2004 Location: NY Senior Member I just read another post you did yesterday, and you stated your heard a turn on thump when you fired up the amp, that would lead me to belive that most of the output stage is working and your problem lie at or around the first 2 transistor on the driver board. Report message to a moderator

Re: 3-15s [message #8431 is a reply to message #8424] Tue, 13 March 2007 09:06   serabul Messages: 10 Registered: March 2007 Location: home Junior Member thanks much and book ordered Ill make sure I keep you posted this combo was bought at a pawn shop up in the upper mich. A friend works up there in the summer and bruight back down over the bridge I have no idea how long the amp had sat in the pawn shop But I do know that I bought it eight years later and had still never been fixed it sat in my friends house. I was suprised to see it was very clean And I hope I can do the repairs if not have to take to another friend whose been doing repair work sin ce high school. hes been pushing me to do repair work. once again thanks much. Report message to a moderator

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