How will a film cap change an electrolytic
I dont see that to happen
It will only have influence at frequencies where the film cap is effective
Which is higher frequencies
Coherence will suffer
I wont exchange coherence with enhanced top
Every component with "impressive" effect always just seem to bother me, and are only annoying when listening
So now I just avoid such
In worst case you may even have ressonance/ringing
At least it sounds that way to me
btw, somewhere I have seen a technical explanation why not to do "snubbers" and "bleeders", which would be kind of the same thing to me
I dont see that to happen
It will only have influence at frequencies where the film cap is effective
Which is higher frequencies
Coherence will suffer
I wont exchange coherence with enhanced top
Every component with "impressive" effect always just seem to bother me, and are only annoying when listening
So now I just avoid such
In worst case you may even have ressonance/ringing
At least it sounds that way to me
btw, somewhere I have seen a technical explanation why not to do "snubbers" and "bleeders", which would be kind of the same thing to me
tinitus said:
well - that's matter of taste and approach ;
also dependable of particular case .....
try and decide ;
at last - that brain between ears is your's , and you're listening with it, not someone else's
F5 enclosure
This italien site has som nice enclosure's http://www.modushop.biz
I wonder if anyone think this cabinett can be used to the F5?
http://www.modushop.biz/ecommerce/cat079_l2.php?n=1
(scroll down to P 400 mm) size: W 450 mm, D 400 mm & H 120 mm.
Since I live in norden europe this seems to be a nive and cheap alternativ to DIY projects
This italien site has som nice enclosure's http://www.modushop.biz
I wonder if anyone think this cabinett can be used to the F5?
http://www.modushop.biz/ecommerce/cat079_l2.php?n=1
(scroll down to P 400 mm) size: W 450 mm, D 400 mm & H 120 mm.
Since I live in norden europe this seems to be a nive and cheap alternativ to DIY projects
I use the 3HE/400 cabinet for the F5. It works very well and looks very much better.
The heatsink temperature hot spots are at 55 degree C on the inside. The outer tops are at 50 degrees.
The heatsink temperature hot spots are at 55 degree C on the inside. The outer tops are at 50 degrees.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Re: F5 enclosure
It might be ok, maybe depending on room temperature
Well, it ought to work ok fore 25watt
Hard to say without specs on heatsink mounted
But 4U better and 5U the best 😉
Its the height you really need
Should I buy a 300mm heatsink it would be no less than 150mm height, and 200mm preferred
But maybe a bit over the top, and might not be needed really
A Fisher 300x200mm heatsink would cost 50EUR each
So modushop prices seem good
I take it they are delivered as shown, with heatsinks
kimarin said:
It might be ok, maybe depending on room temperature
Well, it ought to work ok fore 25watt
Hard to say without specs on heatsink mounted
But 4U better and 5U the best 😉
Its the height you really need
Should I buy a 300mm heatsink it would be no less than 150mm height, and 200mm preferred
But maybe a bit over the top, and might not be needed really
A Fisher 300x200mm heatsink would cost 50EUR each
So modushop prices seem good
I take it they are delivered as shown, with heatsinks
400x120x40 heatsinks are a bit too small for 1.3amp bias, i have to bias at 1 amp to be comfortable. ( i can touch as long as i want).
Nelson says 400x150x5 each
Nelson says 400x150x5 each
http://www.conradheatsinks.com/products/index.html
Check out these guys. Their prices are reasonable.
Check out these guys. Their prices are reasonable.
I received from Conrad this proposal for France but i do not know about customs.
MF35-151.5 x 2 @ 53.36 ea. 106.72 (60.46€)
Delivery 5.5 kg (Aus. Post Sea Freight 10 - 12 weeks) 35.75 (20.25€)
Delivery (Aus. Post Standard Air 7-12 working days) 102.78 (58.23€)
MF35-151.5 x 2 @ 53.36 ea. 106.72 (60.46€)
Delivery 5.5 kg (Aus. Post Sea Freight 10 - 12 weeks) 35.75 (20.25€)
Delivery (Aus. Post Standard Air 7-12 working days) 102.78 (58.23€)
F5 enclosure
Thanks for the reply. I think I'll go up a unit ( 4U) 🙂 One thing I don't understand tho is why R5-8 is 3W? Is there realy that big current running through those resistors? I hoped i could use my 0.6w metal film's here. If not I have 1ohm 2W metal film's that I could parallel in 4 each channel.
Thanks for the reply. I think I'll go up a unit ( 4U) 🙂 One thing I don't understand tho is why R5-8 is 3W? Is there realy that big current running through those resistors? I hoped i could use my 0.6w metal film's here. If not I have 1ohm 2W metal film's that I could parallel in 4 each channel.
Re: F5 enclosure
I believe . . . one reason among others is . . . when we adjust P1 and P2 without connecting the output load, the R5-8 act as a load taking care of the potential high load current. And, this is why I also recommend to use R1 and R2 of at least 0.5W . . .
I hope I have read Papa's consideration correctly . . .
🙂
kimarin said:
I believe . . . one reason among others is . . . when we adjust P1 and P2 without connecting the output load, the R5-8 act as a load taking care of the potential high load current. And, this is why I also recommend to use R1 and R2 of at least 0.5W . . .
I hope I have read Papa's consideration correctly . . .
🙂
These resistors are 100 ohms, and with a full power sine wave
the dissipation on each approaches 2 watts. On a full power square
wave it would approach 4 watts.
😎
the dissipation on each approaches 2 watts. On a full power square
wave it would approach 4 watts.
😎
Nelson Pass said:
I am somewhat curious about that modified feedback mechanism. Do I have this right? Merely 1x 100 ohms? Not 2x 200 ohms "so as to share the dissipation"?