Here's a Delta 12" wood lathe
I bought as a "junker" and completely rebuilt. It was stripped to bare
cast iron, the bed reground and the headstock rebuilt with precision, pre-loaded
bearings. The cabinet was built in our woodshop
This is an 8" Rockwell long bed
jointer bought new in the '70s and -- just for fun -- rebuilt in '00.
When new, the machine was disassembled for inspection prior to being put into service.
It was discovered that the tables had been incorrectly ground due an incredible amount
of swarf being present in the dovetails at the time of assembly, prior to final grinding.
When Rockwell refused to honor its own warranty, the dealer from whom we purchased
made it good. We sent the machine to Dominion Bridge, here in Calgary, who at that
time had a huge Snow, surface grinder capable of working a 36" x 72" surface.
What we now have is a very accurate machine.
Although not evident from the photo, the cutter knives are "back ground"
to reduce the effective rake angle with respect to the work surface. It's not generally
realized that most jointer and thickness planer cutter heads are machined so as to
provide a rake angle optimized for working soft woods. When such a steep angle is
used with hardwoods, "tearout" is a common effect, notable and problematic
with burls. curly, crotch and "birds' eye" grains. When back ground to
reduce the rake angle from 30 to 20 deg. such problems are practically eliminated
and cutter life is greatly extended due the cutting edge being better self-supported.
Any discussion of cutting tools would not, on this site at least, be complete without
mention of the life-extending benefits of cryo-treatment. While not common knowledge
amoung audio folk, such benefit has been known in the metalworking industries for
some time . . .
17" Drill Press
Here's a 17" Rockwell drill press
bought new in the early '70s and rebuilt in '00.
Although it has seen a lot of hard use the machine has stood up well, the only problem
having been a poorly designed motor-mounting bracket that allowed the motor some
real latitude of motion. This repaired, the machine runs beautifully.
Holbrook C10 - 12" x 20" Toolroom Lathe
This is one of the truly great British
lathes and one I prefer to even the likes of the venerable, US-made Monarch 10EE.
While I could go on to some great length over this machine's manifold virtues I'll
leave it to you to download partial copy of the 1960 Holbrook literature on the 'C'
Series of machines here
to see what these machines are truly all about.
An original sales brochure for the later 13" x 24" 'Major' is available
while a brochure for the H-series machines is here.
Micropoint Tool Grinder
This machine is presently completely stripped to bare metal and is going through
a complete rebuild.
You can download copy of some original 1958 literature here.
Scratch-built Glass Beading Machine
A way back in the early '70s I had
a motorcycle shop where I repaired British iron: Triumphs, BSAs, Nortons and the
It happened at one point that I came across a small glass beader/ sandblaster in
the faculty of engineering machine shop on the U of C campus.
Falling in love with the critter on the spot I determined to build one, one that
suited my needs. So, I bought a little Lincoln, 200A "buzz box" stick welder
and taught myself to arc weld -- on 14 ga. sheet metal. I had to build three before
I got the one seen here. The first was a mess but I learned enough to do a good enough
job of the second one that I was able to sell it to a company who wanted it for some
sort of oilfield work. By then I pretty much had myself around the task and mine
went together with relative ease.
Having cut my teeth some years earlier in an auto body shop, the subsequent paint
work was no great challenge.
34 years and a new paint job later this machine still works like the day I put it
It is immeasurably valuable in the overhaul of any piece of equipment such as a machine
At the lower right is shown the side panel from the floppy disc drive of a Data Precision
6000 FFT analyzer being cleaned prior to being sent out for powder coating.
The lift will hoist a 200lb payload, typically a loudspeaker, to 25 ft. above ground
where essentially "free-field" measurement is possible.
Short of a large anechoic room costing many, many hundreds of thousands of dollars,
or this, outdoors testing is the only way to get
truly accurate measurements of low frequency loudspeaker performance.
At the time I built this unit it was, to the best of my knowledge, the only such
dedicated lift in Canada.
Above are shots of a small anechoic
chamber I scratch built in 1982 for use in the development of midranges and tweeters.
Having a useful lower limit of approximately 300Hz. it served my research needs admirably
and somewhat to my surprise turns out to be useful at lower frequencies provided
one measures in the immediate near field.
Anechoic chambers being the
interesting rooms they are, I have assembled a number of documents on their design
and construction into a single 212 pg., 16MB PDF that can be downloaded here.
Included is information on early work done by the BBC, the Danish Technical University,
the Cremer 'Acoustical Jungle' favored by Bruel & Kjaer for its superior high
frequency performance, a hemi-anechoic room, chambers for hearing aid work and the
generalities of small anechoic chamber construction. In all, a worthwhile read .
& Kjaer 2035 Signal Analyzer
Here's a beautiful late model dual
channel signal analyzer that might be the most capable such analyzer Bluer &
Kjaer ever produced.
Along with the rightly famous 2012, it's certainly amoung the of the last of the
great "knob and button" boxes produced before the introduction of the now-ubiquitous
PC-based Pulse software.
In terms of 1,8Hz to 102kHz acoustics measurement, this piece lets me do everything
I can think of and a lot more I don't yet know about.
A 3.7MB, 26 page product data brochure from B&K on the Multichannel Analysis
Systems Types 3550, 3555, 3556, 3557 can be downloaded here.
Dynamics SD 380 Signal analyzer
Text to follow . .
Radio 1630-AV 200 Watt AC & DC Inductance Measuring Assembly
This is piece that came along by dint
of a lot of plain old hard work.
Assembled from instruments purchased hither and yon over a period of a couple of
years, it allows the measurement of, amoung other things, the inductance of iron
core transformers and chokes over a range from 20Hz. to 20kHz., at voltage levels
from millivolts to kilovolts and current levels from hundreds of microamps to several
amps. As well, it can be set up to do BH curves on an oscilloscope
Essential in the design and production of power supply components, plate load and
power supply chokes and output transformers for either single-ended or push-pull
This is a fairly rare piece and one seldom seen in NIST-traceable calibration.
When last produced by GenRad in the mid-'90s the 1630-AV cost some $US38,000.00.