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Old 27th November 2009, 11:56 PM   #2651
tubeamp is offline tubeamp  United States
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do you think you have enough knobs?, very nice project
T
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Old 29th November 2009, 02:07 PM   #2652
igormak is offline igormak  Russian Federation
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SGregory, very interesting design! Congrats.
Left knob seems to be power switch. Is it?
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Old 29th November 2009, 04:22 PM   #2653
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The left knob is the selector switch. The line amp will accept 3 unbalanced inputs. I am not real happy with the knob and will probably redo.
Found some burr wood in our wood pile.
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Old 30th November 2009, 01:05 PM   #2654
n_maher is offline n_maher  United States
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I don't think I've ever posted in the gallery before, so here goes. Of course after looking around a bit I'm left with a decidedly "unworthy" feeling.

Here's my take on the lilliput amplifier using mostly spare parts that I had around from previous, similar builds. The power supply is a SS rectified, choke filtered design by a friend who also helped tweak the amp circuit to better use parts that I had on had. The chassis is oak with a custom aluminum top plate made by Cam-Expert. I'll try to get the schematics cleaned up in case someone else wants to build a 25lb headphone amplifier.
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Old 30th November 2009, 01:12 PM   #2655
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looks nice and clean inside!
and not a whole lot of components either..
the less the better, methinks
gerrit
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Old 1st December 2009, 12:23 PM   #2656
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Very nice job. The internal wiring cleanliness is an inpsiration.
I assume it sounds as good as it looks.
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Old 1st December 2009, 04:55 PM   #2657
n_maher is offline n_maher  United States
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Quote:
Originally Posted by SGregory View Post
Very nice job. The internal wiring cleanliness is an inpsiration.
I assume it sounds as good as it looks.
Thanks! I cut my wiring chops on a few other projects and figured out quickly that while it take a lot of time and effort to end up with a clean layout it really is worth it in the end especially if you have to do any troubleshooting.

And yes, it sounds quite good to my ears.
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Old 2nd December 2009, 01:19 PM   #2658
mckvak is offline mckvak  Czech Republic
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Here is my first tube amplifier. Tubes have 300V on cathode and power of this amp is 4W per channel to 4ohm load. The weight of all amp is 10kg, its quite heavy for moving. I used typical europe tubes PCL86 and ECC83. Brands of tubes are TESLA so I think tubes are from Czechoslovakia. Transformers are from old radio.

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Old 6th December 2009, 05:21 AM   #2659
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Default 10JA5 SE Amp

I just completed a 10JA5 compactron tube SE amplifier for a friend
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Old 6th December 2009, 08:02 AM   #2660
Milen is offline Milen  Bulgaria
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It is dangerous to use octal sockets for power supply. You or somebody else can touch the high voltage pins...
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