Previous : Advance 77B

BEMEX PATTERN GEN.

Next : Hewlett Packard 8551A

Front Voew [28K]

  • Late 60's ?
  • Dual standard crosshatch and dot pattern generator.
  • Estimate ~30 tr*ns*st*rs, mainly BC108s.
  • Original cost unknown.
NOTES A T.V. pattern generator generating dot, crosshatch and blank frame signals for both 405 and 625 line standards.

The front panel has engraved painted lettering which implies this is a commercial product. However the majority of components are mounted on a kind of vero board (wider pitch than the modern 0.1" stuff) instead of a pucka P.C.B. ; this implies this was either sold as a kit or was perhaps the product of a small manufacturer.
SERVICE DATA Nope :-(
CURRENT STATE
A few scuffs and basically sound, although the tuning control probably isn't original. The modulators work and I get some kind of pattern on a T.V. screen, in fact the dot pattern can be very briefly seen as the generator tunes through the T.V. channel so it's almost there. Could be a timing problem (dodgy cap's) or maybe a twiddle of some of those pots ?
WHERE FOUND Auction at the June 2003 B.V.W.S. meeting at Wotton Bassett for £??
View of internal PCB's [41K]
Components mounted on three seperate PCB's mounted onto the front panel. Not shown is the mains transformer and main smoothing caps which are attached to the rear panel.

Page copyright
J.Evans 2003
CLICK HERE TO RETURN TO
THE SIG GEN GALLERY
Last updated
1st July 2002