The Lichtsprecher Project 

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As at July 2011, the story of "The Lichtsprecher Project"

In the beginning...

My enthusiasm for this started some time ago upon seeing fellow collectors equipment on the web. Shortly after I found LA6NCA's excellent video of the LiSpr operating in Norway.

This can be viewed here LA6NCA's set is a complete one with correct microphones, storage & battery boxes, cable and the like.

Another great set can be seen on Yuri's page here. 

My Equipment

First, the two heads. Coincidentally, my two are numbered 211111 & 211222 so I shall refer to them as "Set 1" (or #1) & "Set 2" (or #2). The existing amplifier will be paired with 211111 & the latest one (still in transit) will be paired with 211222.

A lens clean & electrical check are next. #1 has a broken lamp in its lamp holder. The RV2P800 tube is missing also. Replacements need to be sourced. The internal cone also has been misaligned so the lamp was not visible from the lens. This has been gently rectified. #2 appears complete.

9 August 2010

The second control box has arrived...

September 2011 - RV2P800 valves have since been located. Equipment now needs to be checked for faulty components, particularly capacitors!

January 2012 - A busy few months have passed! A pair of connecting cables have been located along with spare lamps for the optical head. There has been no time for equipment checking yet...

Cables as they arrived;

And eight little treasures! All 2.4V & 2 in "Osram" packaging..

February already!

Power supply plugs also need to be fabricated.. (Left) Something like this... (not yet drilled, or had terminals fitted) (Right) plugs drilled & terminals cut. The terminals are made from 4.76mm & 5.5mm brass tube. Just a tidy up to do on the plastic.

The Plugs now assembled. I thought about using a grub screw to fix the terminal, but in the end decided to clip a 2mm panel nail. Using a jig, I drilled through the plug body & the terminal. The pointed end acts as a guide to secure the terminal & the distorted clipped end fits snugly to the plastic body. The remaining part of the panel nail can be used as a punch to push the pin in to avoid any electrical contact with the plug shell. Pic at left with panel nail clipped end, centre pic once it has been punched to secure the terminal. The 3rd terminal is secured from the other side. Final result at right.

The original cable looks like this...