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stereo SE kt88 build ... abdellah diyaudioprojects design
stereo SE kt88 build ... abdellah diyaudioprojects design
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Old 25th July 2016, 03:06 PM   #691
ta240 is offline ta240
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I've got an issue with mine. It does great with most music but anything that has a lot of pretty continuous high notes, like pop where they just kind of fill in the background, I get a static sort of high pitch crackle sound with it. This morning it even did a completely separate crackle after the music.
On jazz or any other music that doesn't run a long stretch of higher notes it works flawlessly. The tubes have all been swapped out over time and it still does it.

Suggestions?
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Old 18th January 2017, 12:22 PM   #692
bekim is offline bekim  Albania
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Join Date: Jul 2004
Location: Prishtina, Kosova
Hi all,

Reviving this thread is a must :-) especially when help is required.

Question:
I can purchase OT Ra=5K I=200 mA and Power=30-40W for this design, and before i do that, will be any benefit if I connect two KT88 tubes in parallel (PSE) regarding output power?
Usually PSE OT for 2xKT88 Ra is 1.5kOhms. Any help is appreciated.

Thanks in advance.
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Old 31st January 2018, 12:04 PM   #693
wdecho is offline wdecho  United States
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Join Date: Oct 2014
stereo SE kt88 build ... abdellah diyaudioprojects design
Quote:
Originally Posted by ta240 View Post
I've got an issue with mine. It does great with most music but anything that has a lot of pretty continuous high notes, like pop where they just kind of fill in the background, I get a static sort of high pitch crackle sound with it. This morning it even did a completely separate crackle after the music.
On jazz or any other music that doesn't run a long stretch of higher notes it works flawlessly. The tubes have all been swapped out over time and it still does it.

Suggestions?
Sounds like a bad connection somewhere or bad solder joint.
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Old 31st January 2018, 12:07 PM   #694
wdecho is offline wdecho  United States
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Join Date: Oct 2014
stereo SE kt88 build ... abdellah diyaudioprojects design
I just finished building a version of this amplifier with some bias changes to be able to use 6L6 tubes.

http://diyaudioprojects.com/Tubes/KT...-Amplifier.png

Great sounding amplifier. This amplifier is definitely a keeper of the more than 30 amplifier builds I have built.
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Old 9th February 2018, 10:09 PM   #695
ta240 is offline ta240
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Join Date: Jul 2016
Quote:
Originally Posted by wdecho View Post
Sounds like a bad connection somewhere or bad solder joint.
I should have posted an update, that is exactly what it was. A bad solder join on one of the coupling capacitors.
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