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Old 21st December 2007, 02:43 PM   #11
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I made a typing error in the past post about the power equation. It's supposed to be P=IV=I^2xR or V^2/R
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Old 21st December 2007, 08:09 PM   #12
gofar99 is offline gofar99  United States
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Hi Everyone, I have read the posts with some interest. I would like to start a dialogue on this amp. I completed a K-8 recently. It was unsatisfactory. (see the blog on the diyaudioprojects.com site for details) I don't like to say negative things about stuff but this amp has the worst sound of anything I own.

The K-8 and K-16 use the same transformers. The impedance needed for push pull parallel tubes in the k-16 is half that of the k-8. Do the math if you want. To achieve this, the impedance of the load has to be halved. So if the original was rated at 8 ohms then the load on the 16 must be 4 ohms to properly load the tubes. That's the good news. My build used Kimber Kaps with Ruby filters and the usual bunch of snubbers together with DC on the heaters. The amp did not perform nearly as well as my similarly modded K-12. At first I tried it with Edcor iron in UL mode then switched back to the originals to see if it made a difference (just as bad really). It distorted way to early and just didn't have the sound quality I expected. I strongly suspect the K-16 will behave in a similar manner. As I say in the blog, I would love to like the new amps, but .... There is at least one other post (of an unmodded amp) that had similar issues. If someone out there has had success, I would like to know.

IMHO, the older kits are better. Cheaper as well
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Old 21st December 2007, 08:12 PM   #13
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Wow, that's some interesting advice. Good thing my K-16 kit arrived today....
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Old 22nd December 2007, 01:50 PM   #14
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Let us know how the K-16 preforms. Bruce made some measurements of the S-5 Electronics K-8LS Tube Amp Kit and they do not look very good at all. Hopefully K-16 preforms much better.

Here is a thread about the K-8 with not so great results.
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Old 22nd December 2007, 07:24 PM   #15
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Well, I'm going to go through with my original plan anyway and cross my fingers that it will be better than the k-8. I really wanted to mount my PT inside my chassis and use a cooling fan to relieve the heat inside. I found a fan that says it is 115 VAC, 10W, 130mA. Can I hook this up to the power from the wall before I run wall power into the PCB?
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Old 22nd December 2007, 10:56 PM   #16
aerius is offline aerius  Canada
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Everything you've ever wanted to know about tweaking the S-5 tube amp kit.
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