Here is work on my 2 Replicas. I found the DStines body to be excellent. The Ivory body is cast from DStines and needs added material in places. (inaccurate) It is also softer Resin and is difficult to work with (like butter) in thin areas. Just buildup with JB Weld when thin. The thread was started on the TPZ and I will update both Threads. Don't forget to Refresh the Videos on the Photobucket page in your Browser.-Steve
The Noise of BN Phasers. I sent Buddahaid the MJE101 transistors when He was doing up two boards for Me from the Schematic He created. This was done during the Joint BN Restore but that didn't help on the Sound. Scott did suggest the Transformer and that turned out to be the Solution. There is no known source for the original but early Flash Units taking two AA Cells do the Job. The transformers today are tiny but efficient, the loud sound is not wanted. Brad's transformers are 3x the size doing the same job. He was at the right time to offer a strobe/flash phaser. Look, it's a ST prop you just gotta have. Special Thanks to Scott Irwin for working 2 Years on the Project with Me to get the Schematic out, you are Scotty!
There's an oscillator that creates AC current from the DC supplied by the batteries. The AC is needed to step the voltage up to the 300 or so volts that the flash tube needs, and that voltage is rectified back to DC and used to charge the capacitor (which can deliver a lot of DC current in a very short time). The sound you hear is mechanical vibrations caused in the transformer as the voltage is stepped up -- the transformer converts the low-voltage AC from the oscillator to changing magnetic fields, which, in turn, induce higher-voltage AC current in a second coil of wires on the transformer. The changing magnetic fields distort the transformer very slightly, and those mechanical distortions are what you are hearing. As for the changing frequency, that has to do with the amount of voltage (think of it as "electrical pressure") the oscillator is working against, which changes the operating conditions of the oscillator circuit.
Sound Problem Found
You can pick up a throw away camera board for $1.00 which has some useful parts. The xeon tube, transformer, coil, diode and large cap. I use the large cap and diode in repairs.
$1.00 Flash Board
I tried a Piezo Speaker on this circuit. It works perfectly for the sound on Scotts Circuit. Some images of Buddahaid's (Scotty) two circuits He built with BN Transformers and MJE101's installed. I'm thinking of installing the Piezo with a hole drilled in the P2.
Piezo Speaker in Scotty's Circuit
Here's the Work on the Bodies...