This is my first attempt at a web site. So things,
will no doubt be, dynamic for a while. Change is
the only constant.
|Private Sub Data_Sheets(type) as PDF '--
I have a library of over 900 PDFs including data
sheets for a variety of electrical components,
hardware, standards, conversions etc that I have
amassed over the years. I want to post a listing
of these files here.
End Sub '-- Data_Sheets(type) as PDF
|Public Function TransLucid(Guitar as Object) as Music
Dim MyGuitar as Object
Dim MoreFun, Tyme as Float
Dim Fun as Boolean
Dim Song, Twang as Note
Static TheFun as Float
Set MyGuitar = Guitar
On Error Goto Oops '-->
'-- make sone sound
While (Fun And Tyme)
Gosub Play '>>>
TransLucid = Song
Exit Function '-- return the concatenated notes --
'-- make a sound
Song = Song & OD_50(Twang) '-- OD-50 function call
TheFun = TheFun + MoreFun
Oops: '-- error handler
if Error = BrokenString
Error.Clear = True
Goto Xit '-->
TransLucid = Error
Error.Clear = False
Goto Xit '-->
End Function '-- TransLucid(Guitar as Object) as Music --
|End Function '-- OD_50(twang as Note) as CoolSound --
Exit Sub '--
|TransLucid Over Drive-50 Front Panel Drawing, ACAD 13c4.
The OD-50 is a 50 watt tube based OverDrive type
Guitar Power Amplifier.
I used this drawing to make the front panel controls label.
I did the 3-D chassis design in AutoCAD 13c4 and arranged to have a metal shop
make 10 of them for our TransLucid Audio Project.
|Background is a TransLucid OD-50 Guitar Amplifier.
This 18" x 8" x 3" chassis is 16 gauge mild steel, with a flat chrome finish, PEMs for
mounting to the custom made wood and Tolex cabinets.
The custom wound power transformer, matching choke and Schumacher 495D
output transformers are oriented for minimum magnetic flux coupling.
For the most recent amplifier:
I made a steel shield for the bottom side of the power transformer to reduce the
amount of flux getting to the preamplifier section.
The 6.3vac filament wires go through a small iron tube that rund along the chassis
from the power transformer out to all the tube sockets, to reduce the amount of
mains flux inside the chassis.
The filament load is about 3.9 amps. Figuring a single open air turn coupling, it
could, loosely speaking, generate about 490 micro-Weber or 490 micro volts of
Mains hum in to a near by conductor.
Every circuit ground point has an individual wire back to the "Ground Star" at the
Power Supply Filter Bank.
I also switched from the 1N5406 to the FR-307 Fast Recovery rectifier diodes for the
main power bridge. To each rectifier I also added a three element Snubbing Network
to each rectifier in the full wave bridge.
This is the way I came up with for mounting tube associated components. They sit
over and to the side of the tube base. Minimum wire, point-2-point. For lack of a
better term I call this style, "open frame". In the case of, "upper left", there are 2
layers of components over the Phase Splitter and one of the Output Tubes.
|Main Fabrication ACAD Drawing. The tubes, shields, coils, controls, screws, nuts, bolts are all individual 3-D
models that I drew for each of the component parts. The 1/4" phone jack drawing has the same parts as the
one I took apart to model. This drawing allowed me to correctly position the speaker out of the way of the
output transformer in RAM instead of ruin. The speaker grill cloth has so many threads that I normally leave
that layer turned off to prevent it from slowing down ACAD.
For what it's worth.
These are screen captures of some of 6 pages of notes I put together to put some kind
of handle on filament current and the potential hum from the flux.
|Private Function OD_50(twang as Note) as CoolSound