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Old 26th February 2014, 12:16 AM   #21
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Hey folks I'm getting ready to build a KT150 set of mono blocks and finally got the tubes. For shites and giggles I thought I'd drop em in my SSE ... Got a good run it last night for a good 3 hrs spinning vinyl and sipping wine etc. Right out of the box fresh they sounded pretty good, very good actually and I'm running this SSE from a 350-0-350 that is running plate voltage right around 350V loaded down (with KT88s) I haven't measured the loaded voltage with these but I would expect the same .... anyhow they sound fantastic. Something about the bass seems cleaned up more and just a feeling but they seem a little more 3D sound stage. I'm not all that good with verbage to describe sounds but I do notice a positive difference and I'm not talking a more warm sound just a little cleaner sounding with more bass and wider deeper sound stage. I've got the amp on right now but I'm in my shop so they could be up in smoke by now!! I doubt it tho. I did modify the power supply some from George's design. My C2 cap is 470uF 500v with the added motor run 100uF so a little beefier than the original design. I have some VERY efficient speakers horn loaded mids and tweeters and 15" bass drivers @ 105+dB/m efficiency so I can hear and notice the bass cleaning up... At any rate here's a few pics for ya's. BTW Trooper sold me his old box so if it looks familiar that's why and HUGE kudos to trooper, he does such a mighty fine job on cases, the stone under the amp is Quartzite (I'm a professional stone guy) :
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File Type: jpg SSE_KT150_2.jpg (406.9 KB, 692 views)
File Type: jpg SSE_KT150.jpg (422.7 KB, 261 views)
File Type: jpg SSE_KT150_3.jpg (407.0 KB, 257 views)
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Old 26th February 2014, 05:52 PM   #22
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Thanks man!!!
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Old 27th February 2014, 12:21 AM   #23
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Great case and gorgeous stone.

Don't start giving me expensive ideas
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Old 27th February 2014, 07:20 PM   #24
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Quote:
Originally Posted by moggi1964 View Post
Great case and gorgeous stone.

Don't start giving me expensive ideas
Stone was free & the case I bought from Trooper at the Swap Meet! This was hands down the easiest amp build I've ever done. Of course having the case already pre built made it SUPER easy.

Still liking those KT-150 as well, I'm throwing a bunch of music at them and I like the sounds I'm hearing.

Cheers,
Bob
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Old 11th May 2014, 12:18 PM   #25
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Here's my iteration on this design. KT150 with 30W Hammond transformers. NOS Stancor 400-0-400 PT, everything under the hood is beefed up. Loaded voltage at the plates is 412v. I don't want to run this without tubes!! Finished this one yesterday, transformers dont even get warm, still breaking in so I haven't plugged in any other speakers than my bench speakers, but those get pretty loud. I'll hook up to a proper set of speakers after family fun today. This amp weighs in at +40#s!!

Click the image to open in full size.

Click the image to open in full size.

Cheers,
Bob

Last edited by bobrown14; 11th May 2014 at 12:21 PM.
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Old 12th May 2014, 04:58 PM   #26
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Here's a pic of my KT150 - don't know what happened in the previous post, I lost those pics for some reason.

Cheers,
Bob
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File Type: jpg KT150_05_08_2014_02.jpg (451.9 KB, 109 views)

Last edited by bobrown14; 12th May 2014 at 05:09 PM.
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Old 15th June 2014, 02:55 AM   #27
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So if I had 5k output transformers, with 8 and 16 ohm taps, I could swap kt88s for kt150s and they would see 2.5k load on the 16ohm tap?

Bob that amp is a beauty!!!
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