....report to the processing office.
Ceramic, bisque-fired, acrylic finished. Life-sized.
Showing posts with label vacuum tubes. Show all posts
Showing posts with label vacuum tubes. Show all posts
Saturday, June 22, 2013
Thursday, September 13, 2012
Enlightenment............
is sometimes just a new addition to the brain.....assuming one is compatible. Ceramic, bisque-fired and acrylic glazed. Roughly life-sized.
Monday, July 16, 2012
OHM.........another look..........
at the piece in progress. The painting stage has begun (as well as positioning pieces to see how it's all going to work).
Monday, July 9, 2012
MORE Tube-Head.............
....little....um....fellows decorating the wall of the studio. Ceramic...bisque fired and acrylic glazed & varnished. Roughly 3-5 inches tall.
Thursday, November 24, 2011
MORE Vacuum..............
Wednesday, November 23, 2011
New Vacuum...................
Saturday, October 1, 2011
Vacuum...................
....tube amplifiers. The top image is a Bell & Howell projector audio amplifier. Lucked out in a surplus find. Dismanted the unit and sprayed liberally with DeOxit. Applied power and She Lives! The volume pot was scratchy -- but another liberal dousing of DeOxit fixed that issue. This unit needs no pre-amp, has volume and a multi-stage tone control with external speaker options. I think it'll make a great guitar amp with little modification.
The working side of the Bell & Howelll amplifier. Nice and clean.
This puppy is a tube amplifer from a 60's Capitol record player. I was asked to fix it by one of the baristas at the coffee shop I frequent. After much GOOGLE searching, I determined the 25L6 tube heaters had been powered in series with a (now missing) motor. Since the 25L6 heaters are 25v, this necessitated a 90v drop at 300 mA...but no matter what I did, I could not get the tube to fire up. Finally applied 24v to the tube heaters and found the tube was dead. Dug through my stash of old 'dead' tubes until I found some 50L6s -- same pinout, but with a 50v 150 mA heater. After a bit of trial and error, I found a 1.2K and 690 ohm 25w resistor in parallel gives me 49 volts at the heaters in operation...and the amplifer works. I very much doubt it's really suited as a guitar amp -- it definitely needs a pre-amp and the overall wattage is very low. The real issue with an old tube amp like this is that it's VERY unsafe -- there is direct connection to 120 without a transformer - so if the capacitor fails....the chassis becomes hot. Or..if the wall socket is wired wrong (I did attach a 3-prong plug to it)...the the chassis becomes hot. So...quite unsafe, but interesting to tinker with.This has been my first foray into vacuum tube electronics since the 70s and quite a learning experience....but diverting and amusing.
Friday, September 16, 2011
Oh yeah........
a Leopard Skin Fez........feel free to feel the awe.....the fear......but I am the same person as always beneath this Hat of Power. Thanks to Niels Nielsen for this induction into the Vacuum Tube Collective.
Monday, February 28, 2011
The Shrine ...........
Monday, January 31, 2011
Sunday, November 7, 2010
Myriad Masks........
Thursday, May 20, 2010
Monday, May 17, 2010
Monday, March 1, 2010
AMPLIFY.................
Sunday, February 14, 2010
Sunday, September 13, 2009
Walter's Secret........
Sunday, August 30, 2009
Thursday, August 27, 2009
Tuesday, August 25, 2009
To Save......
Monday, August 17, 2009
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