These radiators are enough (ok, for hot summer day would be too small, but the bias is set to 1.2 A ) Temperature of heat sink during long listening session - 50-55C. moreover, all the thick aluminum chassis also takes part of heat.
Full marks for the F5 build.looks very on topic to me🙂
my B1(reclaimed Bogen mic amp case) and F5
jim
A bit messy, I planned to tidy up after final testing...........
However I can't stop listening after 7 months.😀
maybe someday
jim
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Only one comment I would make about the wiring is the speaker wire to the speaker binding posts (internal). It looks too light to me. I use the same speaker wire to wire to my binding posts internally as I do to run to my speakers externally.
I use medium guage OFC copper wire. Externally I use four runs of figure eight where each figure eight is treated as a single wire. And I bi-wire.
Member
Joined 2002
ZenV4 with Buffer for Blues
I now just have a modified Lightspeed (I call Lightning Thief) as LDR attenuator to control the Zenv4j and Aleph3 in bi-amp. Sounds swell in both music and movies (passed the Avatar bluray movie test🙂. Difference in gain of the amps are about 6+dB but sounds balanced on my speakers. Differing sensitivities of the drivers or my room probably balances it out...counter-intuitive objectively but is otherwise with my ears. I just went ahead and tried for the heck of it...can't make conclusions with numbers. The MF that I used for preamp before now just sits quietly and listens😀
I now just have a modified Lightspeed (I call Lightning Thief) as LDR attenuator to control the Zenv4j and Aleph3 in bi-amp. Sounds swell in both music and movies (passed the Avatar bluray movie test🙂. Difference in gain of the amps are about 6+dB but sounds balanced on my speakers. Differing sensitivities of the drivers or my room probably balances it out...counter-intuitive objectively but is otherwise with my ears. I just went ahead and tried for the heck of it...can't make conclusions with numbers. The MF that I used for preamp before now just sits quietly and listens😀
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Hi
I posted this pictures about a year ago how I built my Aikido/F4 step by step
Post 2882-2899
http://www.diyaudio.com/forums/pass-labs/97540-f4-power-amplifier-290.html#post1812063
Eivind Stillingen
I posted this pictures about a year ago how I built my Aikido/F4 step by step
Post 2882-2899
http://www.diyaudio.com/forums/pass-labs/97540-f4-power-amplifier-290.html#post1812063
Eivind Stillingen
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Your Shti in the box
OK. What's in the box or have I missed something. Please direct me to some links which shows me what is inside.Please.
I've had this F5 going for awhile. FWIW, I recently checked the bias and adjusted it (after 6 months). It was less than .001 DCV out from my original values. The case is a DIY effort. This F5 was built using the CViller boards, Antek 4218 tranny, and the Tech-DIY kits-Fairchild outputs. Heat sinks were from M&M. The Lexan top was an exhibition affair but It's starting to grow on me. I might keep it instead of the metal.
Also, a little B1, cased and ready to populate (I have it basically done except for the electolytics and chassis jacks).
Also, a little B1, cased and ready to populate (I have it basically done except for the electolytics and chassis jacks).
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