TW
Electronics 1958 - 2000
TW Phase II Transverter
The TW phase II transverter was the last development on the TW amateur radio production line (photo below courtesy of Tom Withers).
It
used a QQVO6-40 valve in the final with a QQVO3-10 as a high level
mixer. The transverter was driven with about 10w of RF at 10m and
produced approx 120w pep output at 2m. The receiver section used the
6CW4 nuvistor converter described elsewhere on this website.
The
photographs below (courtesy of Tom Withers) show the layout of an
unmodified Phase II transverter with its built in dummy load. The 2m
nuvistor converter front end is at the top left in the photo (left)
below and bottom left in the photo (right) below. The RF line up of
6BW6, QQVO3-10 and QQVO6-40 can be clearly seen.
The photographs below (courtesy of Vern M0WQR)
show a Phase II transverter that he is currently restoring. This one
has been modified at some stage and is without it's dummy load.
The
unit looks in remarkably good condition for its age (the very last unit
despatched from the TW workshop was in October 1968), and the wiring
looks completely original. The two chrome handles are missing from the
front. According to Tom Withers an input switching relay has appeared
near the Jackson input capacitor, but he recognises the original wiring as his
own ! The transverter retailed for £69.00.
