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Old 25th November 2012, 03:52 PM   #51
freax is offline freax  Australia
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The other criteria is that it needs to be in kit form, I would build it myself but sourcing the components is expensive to say the least and importing and making the chassis puts me up up in a tuffe about cost aswell.

Then I've got issues with inexperience surrounding how to lay everything out, where to put solder terminal strips, plan it all out in my head, etc.

With this KT88 amp kit, I can have a nice everyday amplifier /and/ at the same time learn how to lay things out, and gain experience in doing so, its the hands on experience that I need.

Maybe next year I will buy an OTL amp I could certianly just keep the older KT88 amp for a spare or use it in some other way.

So this year: KT88 SE.
Next year: Set of speakers.
Late Next year OTL EL509 or 300B amp.

Thanks for the pics!
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Old 25th November 2012, 03:55 PM   #52
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Originally Posted by tubemax View Post
I have sold my 300B SET after hearing good OTL - there is just no comparison... two pictures of my past 300B & 6AS7 OTL.
OT, but how about some OTL 300B monoblocks!! The same guy that designed my 15W OTL has also designed a killer 1W 300B OTL. I have the schematic and parts list from his book, but kits are forthcoming and I think I'll wait. Not exactly economical, but the nuanced detail and imaging is purported to be second to none.

My long range plan is to bi-amp my Altec drivers, running the 300B monoblocks into the horns and the 15W OTL into the 15" drivers.

This rig should be a recording engineers best and worst friend.

This is a pic of the amp done by someone else in a wood chassis:
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Old 25th November 2012, 04:06 PM   #53
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Originally Posted by freax View Post
Maybe next year I will buy an OTL amp I could certianly just keep the older KT88 amp for a spare or use it in some other way.

So this year: KT88 SE.
Next year: Set of speakers.
Late Next year OTL EL509 or 300B amp.

Thanks for the pics!
My current amp is a KT88 based cathode follower. It is 3W/ch of audio heaven and maybe the clearest amp short of an OTL.

Sadly, it is not available in kit form any longer. Bruce says it was his worse selling kit ever, but since it's been discontinued it has developed a cult following...me included. I sourced out the parts from a few suppliers and it ended up costing around $575 all up.

Here's a link to Bruce's page...

Transcendent Sound Cathode Follower Tube Amp

And my build thread. If you read through it you will see I am not the most experienced builder. This was my second project and a great learning experience.

CFA Build... - Transcendent Sound Message Board

After the 15W is running I plan on moving the KT88 amp over to my TV.
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Old 26th November 2012, 05:37 AM   #54
freax is offline freax  Australia
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I'm torn between the 6L6-GC Elekit TU-879S and the KT88 SE kit.

Can the frequency response of the Elekit be believed?
Elekit: http://www.vkmusic.ca/TU-879S.htm
Frequency characteristic (-3dB): 20Hz - 43,000Hz

KT88 kit: KT88 SE Basic or Master Kit
Frequency Response: 30Hz ~ 20,000Hz -1dB, 20Hz ~ 22,000Hz -3dB

I think the KT88 kit would have a far more greater response, mainly because the Elekit has smaller output transformers.

I've got half a day to decide, 12 hours from the time of this posting before its completely final.

I'm currently looking over the smaller OTL amps on Transcendent sound atm.
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Old 26th November 2012, 06:25 AM   #55
freax is offline freax  Australia
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The mini beast is winning my heart, but there must be something wrong with that power consumption figure? 290 watts? for 6x el509 tubes and 2x 6H30pi

all of that power is dissipated on the B+ ? wow

I'll shoot off an email to him. < nevermind, it says so in the description.
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Old 26th November 2012, 06:58 AM   #56
freax is offline freax  Australia
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mmm nice, very nice: Elekit TU-879S 6L6GC
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Old 26th November 2012, 11:20 AM   #57
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The mini beast is winning my heart, but there must be something wrong with that power consumption figure? 290 watts? for 6x el509 tubes and 2x 6H30pi
The SOB has the lowest power consumption of any OTL amp due to it's simplified circuitry and push/pull configuration. The MB, being single-ended, puts off more heat.

The 15W of the SOB makes speaker selection less critical as well. It will drive almost anything.
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Old 26th November 2012, 12:55 PM   #58
freax is offline freax  Australia
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It doesn't matter now anyway, I just asked Scott17 for an invoice and I'm staying up tonight to pay for it so I can get it (KT88 SE Master Kit) as soon as possible.

SOB OTL will have to wait until late next year :P

Thanks for your persistence in this matter, but every watt that I can shave counts, if I can justify spending $1,000 on a 160 watt OTL amp that only gets run only during off peak hours then I will bite on the SOB OTL.
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Old 19th January 2013, 07:28 AM   #59
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Yeah, I'll think about the OTL amp, thanks for your help guys.

Alright, I'll go with the OTL amp.

Removing those output transformers from the signal path is what convinced me that its a good idea regardless, that and the fact that I've currently got speakers that will sing just fine at 15 watts (Sony SS-212's), and that it consumes the same amount as an ST-70...

And that 10 watts tube power is enough for me, but 15 watts is even slightly better.

And I can always roll a couple of chip amps for the 12inch or 15 inch down throwing drivers.
Hello Freax

Like you I've got a pair of Sony SS 212 (40W 8 ohms) dating from my student years. I'm desperetaly trying to find an equivalent for one of the medium speakers which is out of service. Do you have an idea ?
Thanks in advance
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