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Old 18th September 2009, 08:22 PM   #4901
Zen Mod is offline Zen Mod  Serbia
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Old 18th September 2009, 08:53 PM   #4902
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Old 20th September 2009, 02:40 AM   #4903
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Default 6moons

Have you seen the latest article on First watt. Interesting to see pictures of members and the listening area. Neat method to swap out full range drivers. Pleased to see the modest 15 in eminence woofer. Got my first F5 monoblock PD boards up and running just the last couple of days. Printed out this particular forum when it was over 750 pages. Great reading thanks to all of you.
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Old 20th September 2009, 10:21 AM   #4904
sangram is offline sangram  India
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Hi,

Do you think these heatsinks will cut it for the F5 (I plan on two per channel, one for each transistor). I can't find any specs but they are pretty cheap, ~4 dollars each.

They are 12" x 3.5" x 1" fins, and the mounting surface is ~2.8mm thick. They run very cool with the ~30 watts dissipation of a pair of LM3886 chipamps. I thought they would work for the heatload of one transistor, do you think they'll cut it?

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Old 20th September 2009, 10:53 AM   #4905
Beftus is offline Beftus  Netherlands
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With those heatsinks you're about to create a contact grill...
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Old 20th September 2009, 12:31 PM   #4906
sangram is offline sangram  India
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Not enough, eh? Not even for 31 watts of a single transistor? I'll probably have to back off the bias then. Thanks for the input...
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Old 20th September 2009, 12:31 PM   #4907
AndrewT is offline AndrewT  Scotland
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Hi,
note how thin the back plate of those sinks are.
They are designed to take multiple output devices.
An F5 will cook it's pair of output devices on this sink.
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Old 20th September 2009, 12:38 PM   #4908
sekess is offline sekess  United States
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Default Power supply in separate case

If going with the power supply in it's own separate case, would any issues be created since the Filter caps would all be in the power supply case -- far from the amp itsel?

Is it more ideal to have at least the last bank of filter caps inside the amplifier case?

Thanks,
Steve
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Old 20th September 2009, 01:18 PM   #4909
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Is it more ideal to have at least the last bank of filter caps inside the amplifier case? Steve
Yes I think.
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Old 20th September 2009, 01:19 PM   #4910
Beftus is offline Beftus  Netherlands
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I'll probably have to back off the bias then.
It might no longer be a class A amplifier in that case...
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