Re: Another DIY project finished
- From: John Stewart <jh.stewart@xxxxxxxxxxxx>
- Date: Sat, 31 Dec 2005 13:39:53 -0500
Tom Schlangen wrote:
> 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.
> The first rule of magick is simple: Don't waste your time
> waving your hands and hoping, when a rock or club will do.
Looks like your major investment in this one is your time. But a very
good & I'm sure satisfying result!
Cheers, John Stewart
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