Monthly Archive for May, 2010

plate reverbing all up the place

this is the driver attached to the plate with the soldered cylinder brass cone connector. and detail of the barcus berry pickup bud being held tight against the plate with a small piece of soft steel .

this is the remote damper actuating mechanism that i have . its quite a thing well made. the dc motor drives the screw so that the block moves along it. the direction of the screw/block is determined by which button is pressed on the remote. it just changes the polarity feeding the motor. the block would be attached to an folding arm mech which brings a big polystyrene baffle closer or further from the plate. when the block has shifted to either end .. it operates a motor cut off switch so nothing gets damaged. the blue potentiometer attached to the motor gearing adjusts a sense voltage back into  the remote so as to indicate a reverb seconds time on the 16 led display.

so my first compile of sounds ‘plated’ up to their eyeballs. plate testing2.mp3 3meg the plate fx comes and goes thruout. sometimes hard panned. sometimes mixed up front alone and sometimes mixed in the back. ive left some tails hanging and have some beats banging. i havent eqed the reverb send or return and havent laboured over this demo. so its  rough and naked and natural with no beauty mix treatments.

ive changed the pick up set-up so that a very high gain fet (field effect transistor) amp is in the path. it just seems easier than buiding an expensive 4 valve amp with more gain than my in stock devices. the fet amp is small and simple and sounds dam nice actually. it seems to couple to the pickup just right with a very acceptable noise floor. next to do is to fine tune the plate tension to suit and organize the damping mech. not easy. then to create a crate for the whole thing to live in.

plate reverb further up the garden path

new driver
new driver

this strange little thing is a  new reverb plate driver element.  essentially its a speaker magnet and voice coil assembled with a double inverted spider (which holds the voice coil in the magnet gap) and without the normal basket frame and paper/poly speaker cone. a naked motor to vibrate the sprung steel plate.

old broken driver

old broken driver

this is the old blown up dilapidated one. see the handmade brass cone with the little nut retainer on the top … thats the kind of thing i need to make next for the new driver element. shaped from thin brass sheet and soldered.

vortex reverb

vortex reverb

i have two types of pickup device ready to go. a barcus berry hotstuff – hotpoint – hot&hard(?) … and a PZM contact mic. these plates are close now. ive yet to make any driver or pickup amps yet of course. for the get going i’ll use my vortex spring reverb – chassis. its got the right kind of amps to fire up the plate. just for the meantime. im thinking of making the amps into old radios (with internal speakers). so for to allow double life as occassional penthouse apt salon/saloon valve mojo playback unit. or room reverb amp. or office ipod playback amp.