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Old 13th May 2007, 07:01 PM   #21
Sheldon is offline Sheldon  United States
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Build a circuit, make a bunch of modifications to get everything right and quiet, but end up with a messy looking build from so many desolder/resolder operations. Then make another one, same layout, everything clean, but it's not as quiet!!!

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Old 13th May 2007, 07:08 PM   #22
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The appalling lack of affordable and easily customised choices in chassis designs, a similar lack of choice in audio transformers, and for solid-state amps, finding a suitable heatsink for your project but not having any convenient way of mounting it to anything!!! this one annoys me the most.
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Old 13th May 2007, 07:40 PM   #23
AatV is offline AatV  Netherlands
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When the design is in the plannig stage everything seems possible, the sky is the limit.
When executing the design, you have already taken a certain direction, your options ar narrowed and it's difficult to start all over.
Everyone lies said the liar..
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Old 13th May 2007, 07:40 PM   #24
lz is offline lz  Bulgaria
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Waiting when I will have some free time for DIY
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Old 13th May 2007, 07:45 PM   #25
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I hate when some decent parts disappear from market.
The Devil is not so terrible as his math model is!
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Old 13th May 2007, 08:01 PM   #26
NIC1138 is offline NIC1138  Brazil
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Originally posted by Sheldon

Clever. So which is the bonus time? The time not used for hygiene, or the time his wife no longer wants him nearby?

Both. So we have

T_free = T_day - (T_hyg + T_woman) (1)

The more you spend time with woman, the more you become like them, and start to worry about being clean, so
d T_hyg/dt = k * T_woman (2)

This yields, in the Laplace domain,

F_free = delta(s) -(ks +1) * F_woman

So, depending on initial conditions, I think your free time will tend towards zero, or towards your whole day. Eventually you will either have lots of kids and no fine amps, or will become a DIY master, but will contribute to the extinction of our beloved and rare species...
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Old 13th May 2007, 08:10 PM   #27
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1- Twist each filament wire pair, then twist all of them together, solder to the transfomer and find out a wire is in the wrong place after all the wiring is complete inside the messy chassis -> no glowing valves... ;
2- Wiring the volume pot (even worse if it's stereo);
3- Decide what to use for a chassis and looking at the dollar shops for something already made that will be pleasing and unusual when finished.
"There's something organic about a happy cloud of electrons" - Neutron Bob
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Old 13th May 2007, 08:45 PM   #28
coresta is offline coresta  France
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Punching, boring square holes for Tektronix xformers, in copper or stainless steel plates
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Old 13th May 2007, 09:28 PM   #29
nhuwar is offline nhuwar  United States
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Waiting to get all the parts in oh ya and explaining the expense to my fiancée

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Old 13th May 2007, 10:07 PM   #30
JandG is offline JandG  United States
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Hummmmmmmmmm can drive a guy crazy...
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