Repaired PA & changed to toroid antenna matching transformer based on the
design shown on Steve's (GW4ALG) web site but using a monitor scan coil
core. PA 40 volts at 11 Amps & seems much more stable, Antenna current up to
2.5 Amps. PA heat sink gets fairly hot & matching transformer core warm
otherwise no problems during tonights tests on 135.930KHz. The field
strength as indicated by my crude meter is at the same level as when the PA
failed on my previous tests.
It certainly looks like LORAN Rugby is now 24/7.
Gary - G4WGT - IO83qp
Web : http://myweb.tiscali.co.uk/wgtaylor