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Just finished my SE KT88 amp!
http://diyaudioprojects.com/Forum/viewtopic.php?f=9&t=166
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Author:  mwhouston [ 20 Feb 2014, 01:29 ]
Post subject:  Re: Just finished my SE KT88 amp!

M0UKD wrote:
I have had a shopping list of parts to build this amp for way over a year now. The total is £375.72 and this is just the 4 transformers and a chassis, nothing else.
The only thing stopping me has been the price. The output transformers I am looking at are Hammond 1628SEA. A pair will cost £236 which makes up the bulk of the cost.

Does anyone have a better price for the output transformers or an alternative?

Edcor oh so cheap.

Author:  M0UKD [ 20 Feb 2014, 17:05 ]
Post subject:  Re: Just finished my SE KT88 amp!

Hi Mark. Thanks for the reply.
I did order from Edcor in the end. Shipping to the UK was $150 and i'll probably have to pay import charges too, but still, what can one do!

Cheers, John.

Author:  Andre [ 11 Mar 2014, 02:56 ]
Post subject:  Re: Just finished my SE KT88 amp!

HI, I am really new to this. My two Carver amps blew so I decided to build a tube amp instead of buying anything. DO you have a parts list for this build? I would like to attempt this but am not sure what parts to go get. Thanks

Author:  alexg [ 01 Apr 2014, 03:31 ]
Post subject:  Re: Just finished my SE KT88 amp!

Andre wrote:
HI, I am really new to this. My two Carver amps blew so I decided to build a tube amp instead of buying anything. DO you have a parts list for this build? I would like to attempt this but am not sure what parts to go get. Thanks


Are you in the US?

Author:  cobalto777 [ 15 May 2014, 04:15 ]
Post subject:  Re: Just finished my SE KT88 amp!

bsgd wrote:
Hello all!

So, I finally had some time to finish my SE KT88 amp.
The circuit is just like Mikael Abdellah's Single Ended (SE) KT88 Tube Amplifier Schematic.
Image

For the supply I used some UF5408 for the B+ and a couple 6A10 for the heaters (they are heatsinked as they dissipate a lot of power). Bypass caps for the driver stage are some Rubcon ZL and for the power stage standard Nichicon caps. My B+ is also lower to make sure tubes will live a long and happy life.

I'm getting some hum from it (and that was expected) because I didn't use any chokes. But I will put a pair of chokes in there as soon as I get them. Right now all filtering is RC.

Here are some pics:
Image
Attachment:
DSC02041small.JPG

Attachment:
DSC02048small.JPG

whereare the ground chassi whiring???

Author:  MartinGonzalez [ 30 Aug 2015, 01:06 ]
Post subject:  Re: Just finished my SE KT88 amp!

Hi,
Thank you for the beautiful design. Do you have a schematic of the power supply that you designed for this amp?

Author:  mwhouston [ 30 Aug 2015, 10:14 ]
Post subject:  Re: Just finished my SE KT88 amp!

I have built a few amps based on this very simple design. They have all pleased in their own way.

Author:  gonzalo guerrero [ 07 Aug 2016, 23:32 ]
Post subject:  Re: Just finished my SE KT88 amp!

one more,with a s4 preamp integrated!!! :lildevil: ...almost done...

Author:  wdecho [ 08 Aug 2016, 06:02 ]
Post subject:  Re: Just finished my SE KT88 amp!

Very nice and neat looking.

Author:  mwhouston [ 08 Aug 2016, 07:22 ]
Post subject:  Re: Just finished my SE KT88 amp!

Looks good.

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