PP-EL34/6550/EL-PL504 or KT88 Bal. innput - diyAudio
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Old 23rd September 2013, 11:04 AM   #1
AndersN is offline AndersN  Norway
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Default PP-EL34/6550/EL-PL504 or KT88 Bal. innput

Hello everybody, I am planning to build a pp-amp with balanced input, maybe EL34 / 6500/ El-PL504 or KT88. (25-50W?) I have speakers with 88-89dB sensitivity and I have dac with bal. output and bal. preamp. Does anyone have any good suggestions? Not a kit, I do metal work and connect myself, I've built tube amp/preamp before Best Regards to all diy-tube-friends from Anders
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Old 23rd September 2013, 11:27 AM   #2
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Pete Millet's Push-Pull KT88 / 6L6GC / EL34 / 300B / 2A3 amp with "universal" driver PCB. Get his PCB or make your own PTP wiring.
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Old 23rd September 2013, 11:45 AM   #3
jazz is offline jazz  Netherlands
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Hi,

Have a lookat Allen Wright's pp1c and pp2c. Both have been discussed here.
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Old 26th September 2013, 11:12 AM   #4
AndersN is offline AndersN  Norway
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Thanks so much, Allen Wright's pp1c looks ok, and I think I have most of the parts
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Old 26th September 2013, 11:22 AM   #5
tinitus is offline tinitus  Europe
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I would say it depends on how much signal gain you get from your balanced preamp
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Old 26th September 2013, 11:33 AM   #6
jazz is offline jazz  Netherlands
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Hi,

Just a quick note. build it with kt88's for about 25 watts. The el34 will only deliver 15 even though that would be enough for me with such speakers.

Joris
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Old 4th October 2013, 07:59 PM   #7
lordoff is offline lordoff  Bulgaria
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Anders, why not Allen's PP2C? I fallen in love with this design :-)
Or go expensive - use input and interstage transformers!... OK, you can get some nice inspiration from Kevin Carter, K&KAudio
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Old 14th October 2013, 08:11 PM   #8
AndersN is offline AndersN  Norway
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Thanks so much for the good advice, pp2c looks really good looks ok to build, thanks. AndersN
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Old 6th June 2014, 08:02 AM   #9
NicB is offline NicB  Australia
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Hi, did you ever build this amp? I am thinking of building it myself.
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Old 7th June 2014, 07:29 AM   #10
vtr is offline vtr  Switzerland
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Default yes i use it

Quote:
Originally Posted by NicB View Post
Hi, did you ever build this amp? I am thinking of building it myself.
in 2 versions first i modded a dynaco mono block with kt88 and changed later to 300b.

and my small/spare amp is a v81 irt broadcasting e84l amp modified similar to the pp2c amp

ask johanna-allens wife if she sells the building map.

klaus
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