Thanks 78F350 your help was much appreciated.
By pressing 0 & 1 for 8 seconds the 'Service' menu came up. I had to choose 'Europe' to get the 100kHz increments.
I fixed another problem, the two knobs volume and tuning were perished from age and sticky to the touch. I got some clear nail polish from my daughter in law and painted it on (after checking on some scrap rubber). FIXED !!
One Happy Chappy !!!
