F5 power amplifier

[nicoch58]

are the same size of vinyl LP

my are 250x300

[woodturner-fran]

I started on the casework tonight and I almost cried. I'm recycling a worn out fostex rack mount 8 channel digital tape recorder as the case for the F5. Although the thing came from a studio and the heads were worn out, it was a real shame to gut the thing out. It was a lovely piece of engineering. You wouldn't believe the number of screws and crossbraces in this thing. It must have cost a fortune to make!!

Anyway, it will make for a nice case. Depending on how hot this thing gets I may add a fan... so I will be leaving provision for that. Adding even a small fan on my mini-aleph made a fair difference, dropping the internal case temp by 10 degC and dropping the heatsinks by about 5 deg C. Brings them back from 60 to 55. Nelsons controller circuit worked a treat (thanks)


Fran

[nicoch58]

if you dont have metal shop near ,you can tray single part here
http://www.modushop.biz/ecommerce/cat099_l2.php?n=1
for top and front

[woodturner-fran]

I hve visited that website loads of times intending to buy a case there but it just never worked out, or I recycled something else to suit.

They seem very fair in their prices both for the cases and shipping...

I might just fit a wooden front to the amp but am a little concerned as to how it would hold up to the heat. Maybe a little spacer would help a bit with that.

Fran

[nicoch58]

this link

[labjr]

Originally posted by kierownik
hello
i planning to build a 10 channel amp, and i was wondering if i could stuff 5 F5 boards in to single case (how big the transformer would have to be?) or should i do 5 dual mono blocks?

I don't know how you'll fit ten chanels in one case. That will be one large amplifer. Maybe you could make ten monoblock modules each with it's own transformer.

[woodturner-fran]

Jeez, 10 channels! and i'm worrying about the heat that 2 will throw out!

Maybe you should consider going to forced cooling - might simplify the build and make it a bit smaller.

Fran

edit: nichoh - nice, I like that carbon fibre. Maybe as a front on its own. Right now though I think I'm gonna get some figured wood and maybe inlay it with some metals.


Does anybody know where I might get a latching push/push off type switch that will handle the current draw of this amp. Looks not really important, just that it works and is preferably 2 pole?

[enzedone]

1) Switch: I had the same problem, so i am going to use a soft start
2) Wood panel: I am also using a wood panel and was worried about the heat so I put some small washes to space the joins out a little.

[kierownik]

I'm getting this case
it's dimensions 485w/350d/180h

[labjr]

Originally posted by kierownik
I'm getting this case
it's dimensions 485w/350d/180h

That looks nice. Where are you getting it from?

Does it have enough heat sink?