Wood Welder TC
From: Jim Fosse [SMTP:jim.fosse-at-bjt-dot-net]
Sent: Tuesday, June 02, 1998 9:06 PM
To: Tesla List
Cc: Bill the arcstarter
Subject: Re: Wood Welder TC
On Tue, 7 Apr 1998 01:25:35 -0500, Tesla List <tesla-at-pupman-dot-com>, I
>>I open the unit up today and cleaned as much saw dust as I could get
>>out without actually washing it out.
I picked up a flatbed scanner last week. I've taken some
photos and scanned them. I am not happy with the photos. The color and
contrast are both off. I'm not sure if it's the result of old film or
the processing lab mucking up because the shots of my halloween
decorations on fuji film developed at the same time are great. For
theses photos I used a roll of 2 year old Ektar 25 film.
Any suggestions (off list to jim.fosse-at-bjt-dot-net) on improving the scan?
I used 300 dpi and then saved in jpg format with a 50 quality factor.
at ftp.bjt-dot-net/users/jfosse you will find:
The wood files are of the wood welder I posted about last april.
Wood_833As shows the tubes with their filaments lit (the photo just
does not show the beauty of these bottles when lit).
Wood_back shows the open back of the unit.
Wood_front shows the (closed) front panel and controls and the
"welding" head. Unfortunately, the close up pictures of the welding
head did not turn out.
Wood_inside shows the removed inner chassis. The rectangular metal
frame in the center holds the tank capacitor on standoffs. The 12 ga.
wire that goes from standoff through the tank capacitor holder to the
other standoff is the grid feedback pickup. In the top center of this
picture you can see the single turn 12 ga. pickup that drives the
wood_833As.JPG 84 Kb
wood_back.JPG 108 Kb
wood_front.JPG 97 Kb
wood_inside.JPG 94 Kb
wood_tank.JPG 98 Kb
Also, the cw files are of a 180kV 5ma Crockroft Walton multiplier. The
cw_all photo shows the assembly from the top. The outer 2 boards are
the cap strings, the middle boards are the HV divider string.
The cw_diode_string photo shows the bottom of the motherboard with all
The cw_driver photo shows the "6 pack" of flybacks that drives the cw
cw_all.JPG 90 Kb
cw_diode_string.JPG 84 Kb
cw_driver.JPG 73 Kb