Do these heatsinks really suffice?
/RK
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.
looks very niceand F5
jim
can you show the inside?
Full marks for the F5 build.looks very on topic to me
my B1(reclaimed Bogen mic amp case) and F5
jim
looks very nice
can you show the inside?
A bit messy, I planned to tidy up after final testing...........
However I can't stop listening after 7 months.
maybe someday
jim
Attachments
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.A bit messy, I planned to tidy up after final testing...........
However I can't stop listening after 7 months.
maybe someday
jim
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.
Banned
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
Attachments
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 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'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).
Attachments
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What are you using 6mm Al plate?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).
F5 + dcb1
Nice job , beautiful amplifier .................
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