Home » VintageKustom.com » Repairing Kustom Amps » K100-2 Hiss but no other output (Need help troubleshooting)
Re: K100-2 Hiss but no other output [message #21137 is a reply to message #21116] Tue, 12 August 2014 10:55 Go to previous messageGo to previous message
daveobergoenner@gmail.com is currently offline  daveobergoenner@gmail.com
Messages: 104
Registered: January 2007
Location: Missouri
Senior Member
Jerry:

You might wanna try the "Panasonic FM" series aluminum electrolytic caps. Mouser (and others) carries them. I've had very good results with them in hundreds of pieces of equipment. They are rated for the higher 105 degree C temps, and have pretty low ESR. Panasonic also makes their own electrolyte paste (as opposed to buying it from a second party in China), and hasn't been subject to the "bursting cap syndrome" common in computer devices.

As was suggested, ya might wanna start with the first stage transistor, and work your way out. I haven't had any of the newer replacements fail in mine, but then again, the originals were still working too. The newer transistors are MUCH quieter however. After replacing most of the preamp transistors, and the summing board transistors in my K200, you can hardly tell that it's even on. My noise is almost 80db down from the max output!

For the schematic, go to vintagekustom.com, click on the "Technical" amp head on the left, and then to "schematics by amp model". You will see your K100-2 on the list.

Sorry about the miss-lead on the reverb foot switch. I had my switch logic confused. I don't have a foot switch for the reverb on my K200 either, but I did wire in a toggle switch on the back of the amp to turn it on and off. Since I'm a bass player, I didn't really need it on, and when it's off, the amp is considerably quieter. Always go with whatever SteveM, ChicgoBill, or C4ster say here. They have much more experience with Kustom amps than anyone else here...including me. Smile

Dave O.

Dave 0 Wall-O-Bass
Webpage - <a href="http://webpages.charter.net/daveobieone/" target="_blank">http://webpages.charter.net/daveobieone/</a >

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