Re: Another DIY project finished

Hi Andre,

> but would you be prepared to publish a rough
> cost breakdown. It may be of interest to the
> other Tom, who is just starting.

Now this is really hard to tell, since the only
parts I purchased were the OPTs (33 Euro a piece)
the two 6SJ7 tubes, four 68pF styroflex condensers
and some sheets of abrasive paper to prepare for
the painting.

Everything else I had already in various drawers,
like the PT, tube sockets, 6V6 valves, speaker posts,
input jacks, resistors, condensors, switches,
solder strips, IEC jack, fuses + holders, screws,
grommets, shims, metal sheets for the chassis, the
paint, wires, whatelse.

No boutique parts were used, just generic carbon
comp resistors, a few wirewounds, standard Wima MKS
and MKP condensors.

One should not underestimate the costs for all
those small parts, especially if one is mad enough
(or has no other chance than) to buy screws at DIY
markets, packed to 4 pieces in blister display
packages, for 2 Euro a packet ...

Moreover, one should not underestimate the costs
of tools and measuring gear when starting. Especially
if one wants to make the chassis completely DIY and
wants to measure through the circuit and optimize
frequency dependent feedback networks.

When I would be asked what I consider to be the most
essential tools for tube DIY in my workshop, I would
say, 1st a real good soldering iron and 2nd, a trusty
VTVM (yes, a VTVM, not a DVM. I was luckily enough to
get a HP410C w/ HP11036A AC probe this christmas,
but a simple Heathkit IM-18E or comparable, available
at Ebay for 20-30 Euros or something, will do okay).

But back to your question: As a rough estimate I would
say it would take about 150 Euros in parts to duplicate
this little amp screw for screw, if one has to buy all
the parts, including paint and whatelse. Again, the
necessary tools are not included in these 150 Euros,
of course.

Tom

--
The first rule of magick is simple: Don't waste your time
waving your hands and hoping, when a rock or club will do.
.

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