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Old 31st March 2013, 02:20 PM   #1
cgraf is offline cgraf  Switzerland
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Join Date: Jan 2011
Location: Geneva
Default Point to Point SET KT88/6550 Build

Hi Guys
As more as I try to inform myself as more I get lost ...

After a few nice builds using pcb boards I would like to build an amp using poing-to-point wiring for my next build.
As I don't need a lot of power I thought to build an amp around KT88 tubes, but single ended. Iron to be defined, thought about Tango or Silk will see.

During my searches I found two designs I like: One is from Doug Tuthill, the other one from Jean Hiraga who uses a pp design on the first stage.

I would appreciate a lot some advises on the two designs, especially about the difference on the sound (the expected one). The music I hear most is Jazz and Jazz voices.

Thanks a lot and best regards from Geneva

I will attach both schematics for reference.
Attached Images
File Type: png Jean-Hiraga-12AX7-SE-KT88-Tube-Amp-Schematic.png (38.5 KB, 217 views)
File Type: jpg 6550 sch2_by_Doug_Tuthill.jpg (172.5 KB, 216 views)
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Old 31st March 2013, 04:57 PM   #2
rmyauck is offline rmyauck  Canada
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Join Date: Apr 2009
Don't know about those , but this seems to be very popular with UL optional with the schem. in the first post over @ diyaudioprojects.

KT88 SE Abdellah (modified by Alex Gendrano) + AK.. - AudioKarma.org Home Audio Stereo Discussion Forums

Scott17 even went on to build a Kit of it partial or full and everyone really liked the sonics. There is more in diyaudio on it before he came out with the kit.

KT88 SE Basic or Master Kit

Last edited by rmyauck; 31st March 2013 at 05:00 PM.
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