I'm using the big ones, MF35-151.5. I'm going to try security mesh plate on top for more ventilation to see if that helps cool things.
Loudspeakers for the F3
Assuming you can't find a pair of ancient 15" HPD Tannoys like Papa's got, and the Lowther's and Fostex's are too "tizzy' for your tastes, what do you guys recommend for a reasonable loudspeakers for these bad boy's ?
I'm thinking the new Tannoy Precision 6's or 8's might be a good match. 93 db / watt, and they have the additional benefit of excellent time / impulse response....close to what Thiel and Vandersteen have achieved in a much simpler design. Any opinions ??
Assuming you can't find a pair of ancient 15" HPD Tannoys like Papa's got, and the Lowther's and Fostex's are too "tizzy' for your tastes, what do you guys recommend for a reasonable loudspeakers for these bad boy's ?
I'm thinking the new Tannoy Precision 6's or 8's might be a good match. 93 db / watt, and they have the additional benefit of excellent time / impulse response....close to what Thiel and Vandersteen have achieved in a much simpler design. Any opinions ??
Attachments
heatskins and case
I have 23-30°C ambient depending on season, and I do not want to stay w/o music in summer.
This is what I plan to get:
http://www.modu.it/pesante_diss_10mm_laterale.jpg
The case size is 45x40x22cm (5U tall).
HS are roughly 215x390x50mm.
There is a bigger model deep 50cm, but that would cause me placement issues.
Unfortunately it's not all aluminium, only the heatsinks, which are not deep, but quite close to each other.
Do you think is good enough?
Otherwise, I'll have to go for an entirely custom design made of alu.
ZUM911 said:
I have 23-30°C ambient depending on season, and I do not want to stay w/o music in summer.
This is what I plan to get:
http://www.modu.it/pesante_diss_10mm_laterale.jpg
The case size is 45x40x22cm (5U tall).
HS are roughly 215x390x50mm.
There is a bigger model deep 50cm, but that would cause me placement issues.
Unfortunately it's not all aluminium, only the heatsinks, which are not deep, but quite close to each other.
Do you think is good enough?
Otherwise, I'll have to go for an entirely custom design made of alu.
I use those large Conrads for my Zv9 and I can hold my hands on them indefinitely. Does the F3 run hotter?
sts9fan said:
dunno for your ZV9 , but F3 have 70~75W of dissipation/ch , if made according to Papa's R0 11/04/05 schematic
sts9fan said:
I may be a sissy, but I cannot stand more than 6-7s. That means case/dissy replacement for me.
Well this is the one of the many good things about this forum...taking into account Telstar's feedback i decided to review my layout using AAvid Thermalloy OD452 heatsink ( 402 x 79,5 x 150 rated at 0,15ºC/W ).
So box gains 10 cm in depth and some decent breathing room.
All in all much better.
some pics:
So box gains 10 cm in depth and some decent breathing room.
All in all much better.
some pics:
Attachments
Ah CeeVee,
There's plenty o' room there for a nice buffer and maybe a Lightspeed vol control to complete the package!
And with all that extra *C/Wto spare, you could go all the way with a rather good shunt reg to replace the Cmultiplier!
Magic amp - the DOA head amp has similar characteristics.
There's plenty o' room there for a nice buffer and maybe a Lightspeed vol control to complete the package!
And with all that extra *C/Wto spare, you could go all the way with a rather good shunt reg to replace the Cmultiplier!
Magic amp - the DOA head amp has similar characteristics.
AAvid Thermalloy correct ref seems to be OS452 :
http://www.aavidthermalloy.com/cgi-...52&LengthUnits=mm&ExLength=402.00&TReff=0.149
Is it right ?
http://www.aavidthermalloy.com/cgi-...52&LengthUnits=mm&ExLength=402.00&TReff=0.149
Is it right ?
Spares?audiojoy said:
What about the ones everyone wanted to build???
I'm doing alot of spring projects around the house and such, but, the F3 board is ready for the case and sink. Generaally the most creative part... I'll see what I can post here soon...
Any other brave souls have completion in sight???
😀
F3 Boards
Want to build an F3 and would like to know where I can purchase the boards. Would appreciate suggestions from anyone following this thread. I'm new to this site and the Pass Labs Forum, but am an experienced tube DIYer. Have been reading Nelson's articles and posts in this forum. Very anxious to compare the F3 to my
tube amps.
Want to build an F3 and would like to know where I can purchase the boards. Would appreciate suggestions from anyone following this thread. I'm new to this site and the Pass Labs Forum, but am an experienced tube DIYer. Have been reading Nelson's articles and posts in this forum. Very anxious to compare the F3 to my
tube amps.
Try to put the add in Trading Post section: F3 boards wanted.
We've sold at least 400 of those and I'm quite sure not everybody is building the amps 😉
We've sold at least 400 of those and I'm quite sure not everybody is building the amps 😉