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Old 20th December 2008, 03:56 PM   #3081
troystg is offline troystg  United States
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Location: In a dream... Please don't wake me.
He might be protecting the people and not the equipment.

I know some designers who "ONLY" use fuses for peoples sake and not the gear. They claim that they can hear the difference between different amperage fuses...

Like always we can't say what they can and can not hear but I did change a fuse on him one time and he did tell me that I need to go back to his value.. He had no idea I changed the fuse...

Funny thing is his piece I have has been running for over 10 yrs without a hic-up. If any part did fail the entire device would self destruct before the 10 amp fuse blew, but it has been solid so far.
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Old 20th December 2008, 05:38 PM   #3082
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Quote:
He might be protecting the people and not the equipment.
This is correct. If these fuses ever pop, it would be to an already catastrophic event. The 4A would be a fast blow fuse value, btw, as was just an off the cuff value.
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Old 22nd December 2008, 05:08 PM   #3083
Apex Jr is offline Apex Jr  United States
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Default Cases-- Chassis's

I am looking to put a package together and need to know
the size of the Chassis/Box needed.

I have found some good deals on both Plastic and Alum
cases.

Plastic cases 1.6MM Thick
8 1/2" Length 5 1/2" Width and 3 1/4" Tall
7.44" Length 5.43" Width and 2.62" Tall

Flanged Alum case
6 3/4" Length 4 3/4" Width and 4 1/8" Tall

Will any of these work ? ? ? ? ?

Steve @ Apex Jr.
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Old 23rd December 2008, 12:18 AM   #3084
udailey is offline udailey  United States
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Steve,
Those will all work. We are looking at dimensions on the board of about 3 wide 4 long and a bit over 2 tall. NOW the problem is a heatsink. As long as a heatsink can sit on the chip (not much sink is needed) and still not touch the RCA in and Speaker outs then I think this would work to house each amp independently.
Then a separate enclosure would be needed for the toroid and fuse/switch/plug
Uriah
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Old 23rd December 2008, 03:06 AM   #3085
udailey is offline udailey  United States
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Sorry to inject group buy stuff in here
We are looking for these following people to send their contact information. Need names/address/DIY ID/email
bacood2000
warp_foo
samsagaz
tube-arama
bandol83
vglaso
nvrgdenuf
Daveze
mikesnowdon
aquaman
jims
jonclancy
Spotticus

If you guys are around and still interested please notify me.
Uriah
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Old 23rd December 2008, 10:58 AM   #3086
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Quote:
Then a separate enclosure would be needed for the toroid and fuse/switch/plug
Not recommended, unless you add another fuse in the amp case. I think all of the cases mentioned would be too small actually.
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Old 23rd December 2008, 04:12 PM   #3087
troystg is offline troystg  United States
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Default Re: Cases-- Chassis's

Quote:
Originally posted by Apex Jr
I am looking to put a package together and need to know
the size of the Chassis/Box needed.

I have found some good deals on both Plastic and Alum
cases.

Plastic cases 1.6MM Thick
8 1/2" Length 5 1/2" Width and 3 1/4" Tall
7.44" Length 5.43" Width and 2.62" Tall

Flanged Alum case
6 3/4" Length 4 3/4" Width and 4 1/8" Tall

Will any of these work ? ? ? ? ?

Steve @ Apex Jr.

Steve in case you missed it (PUN intended) this was the post of the dimensions:

http://www.diyaudio.com/forums/showt...78#post1686678
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Old 27th December 2008, 01:02 AM   #3088
schro20 is offline schro20  United States
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Default pot on input to amp

What size pot would be recommended on the input?

Peter
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Old 27th December 2008, 01:19 AM   #3089
udailey is offline udailey  United States
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I think Mauro said 10k-22K. I am using 10k. Works well.
Uriah
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Old 27th December 2008, 11:38 PM   #3090
Floric is offline Floric  Europe
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Hi,

using "the Penasa" for years now, 10k is o.k. for the amp but there are sources out there which can't cope with 10k. Even in our days that's possible! If you have that problem, you will experience a lack of bass.

22k are better under that respect - the universality of the amp. the best way are 50k to 100k but you will need a buffer with that. I am using the B1 built on stripeboard right now (the ZM'ed version with the symmetrican PS) and I am glad.

Best regards

Flo
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