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Old 27th June 2013, 08:08 PM   #2041
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Or use black anodized plate on the front and then engrave the design out (so there is a deep enough groove) and add in white paint.
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Old 27th June 2013, 08:35 PM   #2042
WalterW is online now WalterW  Netherlands
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Quote:
Originally Posted by Andersonix View Post
I don't think you should flip the diagram on its side, nor use the concentric arcs at input and output (see the sine wave NP uses to indicate larger signal), nor use some non-standard potentiometer-looking connection (with the arrow) to the V rails. Keep it as standard as possible...
+1, the concentric arcs look like a sign of an antenna, sine waves will look nicer...
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Old 27th June 2013, 09:48 PM   #2043
BDP is offline BDP  United States
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My F4, Waiting on my transformer so I can listen to both channels. Biased at 1.3 amps and the heatsinks are at 50 C.
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Old 27th June 2013, 09:56 PM   #2044
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Excellent organization. Watch temps on sinks. You will love the amp.
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Old 27th June 2013, 10:34 PM   #2045
BDP is offline BDP  United States
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I have F3's and really like them. I've been wanting to build the F4 for sometime and in anticipation I built the Impasse preamp. The transformer group buy pushed me over the top. I had heatsinks and power supply boards from previous group buys. When they are all together I can get a good AB comparison.
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Old 28th June 2013, 04:02 AM   #2046
WalterW is online now WalterW  Netherlands
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I like it very much BDP, nice clean build!

Walter
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Old 28th June 2013, 12:39 PM   #2047
12B4A is offline 12B4A  United States
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Here's a visualization with some of the suggestions. Not too shabby...
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Old 28th June 2013, 07:10 PM   #2048
AndrewT is offline AndrewT  Scotland
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I rather like the black front with the silvery aluminium shining through, no white paint.
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Old 29th June 2013, 11:02 PM   #2049
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Just speaking because I can, I kind of like that anodized black front plate.

If you really wanted to get kind of in your face about it (well, too late for that since the etched circuit diagram is staring you in the face already), then put a diode symbol in the circuit diagram for the power indicator, and drill a small hole corresponding to that and put in a diode.

But for mercy's sake, use a relatively conservatively rated light output diode (your amp, your colour choice, but I am partial to the orange or green ones). I was victim to an amp last week and I so wanted to turn off the amp as the light from was so agonizing (remember at the end of Indiana Jones when they open up the ark? That amp used it as inspiration).

Since I am full of opinions when projects aren't my own, I would make a slight design recommendation to the face plate -- make it overhang the edges top, bottom, and sides by 2 or 3 mm than the side fins, bottom plate, and top plate.

Furthermore, make the diagram maybe 92.5 - 95% of what you have it on the current face plate mock up. It seems to be too close to the top edge.

Otherwise, it is very sweet looking.
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Old 30th June 2013, 04:50 AM   #2050
Einric is offline Einric  United States
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Default My F4

Biased at 300mV and my middle pin temps are 45-48C.
My fans are running 8V each and are damn near silent.
I will order up some zener's to get them down to 6.5V each.
I really love this thing! It's just great.
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