Pictures of your diy Pass amplifier

[leif christensen]

I tested pictures link before I posted, BUT it changed status after a short time...don´t get it!
will try your suggestions later..
one monotower was finished yesterday....next up today...
thxs
best
Leif

 

[leif christensen]

Upload test of Tower of Power

general construction

 

[leif christensen]

ok
thought it wasn´t possible to upload directly from ones pc
anyway
now I´ve gotten the pics from my Sony Xperia Z1 phone
early stage testing trying to get read of excessive heat due to what turned out to be caused by to high seconady voltages..started with 50 VAC but ended up with 40

 

[leif christensen]

even involved a fan!

 

[leif christensen]

watching closely

 

[leif christensen]

early testing of "fan versions" in system
replacing all out Borderpatrol 300B monos from 75Hz and up

 

[leif christensen]

detail of present and final version

 

[leif christensen]

testing last monday evening after installing new 40vac 1KVA transformers and having decided to revert to V1 ex MUR3020
overshooting voltage was a major problem with 50vac secondaries and I´ve definitely been in the fire extinguisher league for several months! he-he
on their way up to target 350mV
protection pcb´in front ready to install

 

[leif christensen]

different angles last night before assembling alutube and top lid

 

[leif christensen]

on the bench ready for heat testing
aiming for pure convection cooling
if passing, I´ll assemble last one tonight

 

[Andrzej Sochon]

leifchristensen,
very interesting design; jealous of being able to precise sculpting in wood and metal.

 

[leif christensen]

MDF cnc ´d @friends place
alu tubes from supplier in germany through Norwegian distributor......not cheap!
heatsinks from Rocket Range 150KVA UPS in northern Norway

 

[leif christensen]

even considered alu base and top, but the costs!

 

[jdg123]

leifchristensen, Very interesting design and wow, what a set of speakers you've compiled!

I have gone vertical with my attempts at a F5t v2. I had great results. These only get to 85F after an hour at 345mV across the source resistors. They are made from scrap I got at the recycler's. Obviously those are CPU coolers on the side, mounted to 12mm plate which itself is riddled with random holes. Hey, they work! The amp sounds great!

Thanks to all those who help! No one does this kind of thing alone ;-)

 

[leif christensen]

cool design as well
the thought of a cpu solution has crossed my mind as well
a waterfilled rod to clamp down the outputdevices might be "cool"
might get condensation to solve though....
best
Leif

 

[Zen Mod]

boyz

Fugly! and Ubercool!

 

[acamilicko]

@leifchristensen

Friend, it was more than worth giving you advices how to post images

Fantastic work.

 

[dady]

different angles last night before assembling alutube and top lid

Babel Tower, very original.

 

[AuroraB]

Well, hello Leif...... VERY nice builds, - again! Congrats!
may contact you about F5 experiences, if I manage to get moving again later this winter... too many house technical prob's these days....

 

[udailey]

Ok, who else spotted the Bybees on the ETI Bullet?