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Old 20th April 2004, 08:16 PM   #1
xpetey8 is offline xpetey8  United States
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Default PP 807's

Hi Folks,

Has anyone built the PP 807 (20watt) amp shown on the Fi Primer site? Does anyone have a schematic for something similar?

xpetey8
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Old 21st April 2004, 10:02 AM   #2
SHiFTY is offline SHiFTY  New Zealand
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I built a PP 807 amp as my main amp, it sounds fantastic. I use UL operation instead of triode and cathode bias instead of fixed, but apart from that it is similar to the one at http://hollowstate.netfirms.com/DIY_files/777.gif from the Mapletree Audio website.

I would recmmend 807s, they are great sounding valves, lots of power and cheap as chips.
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Old 3rd May 2004, 09:09 PM   #3
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Default another 807 PP

Go to www.triodedick.com -> projects -> topcap.

A 807 push pull amplifier with a 6SL7 as phase splitter.
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Old 4th May 2004, 08:24 AM   #4
Colt45 is offline Colt45  Serbia
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Yous should be able to get a hell of a lot more than 20w out of a pair of 807's.. moreso if you push the voltage envelope..
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Old 8th May 2004, 09:42 PM   #5
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Default PP 807 williamson

I have a PP 807-6sn7 mono williamson amp that was a DIY project built in the mid 1950's by a friends father who is now RIP. I gotta say that 50's rock never sounded better than on this amp. The first time I listened to "at the hop" on this amp was a real eye opener. The whole mix just sounded right. the balance between the vocals and the drums were perfect. My SRPP 6as7 can't treat stuff from th 50's as well as the pp 807 amp can.

Go for it!
Robert Morin
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