30-06-2012, 10:33 AM
hi lawence
i dont know if this will help but if you suspect the osc is not working ,mesure the voltage at the ocs anode the short the controle grid to eath ,if the osc was working the voltage will rise.
you could also try using another set tuned to mw in close proximity to set under test and tune set under test along the mw band you should be able to pick up the signal from the ocs (will cause a null in the noise from other set) workes better with a few turns of wire wrapped around mixer /osc with one end drapped over the oter set.
the voltage supplyed to the nixer grid should be negative
rob t
i dont know if this will help but if you suspect the osc is not working ,mesure the voltage at the ocs anode the short the controle grid to eath ,if the osc was working the voltage will rise.
you could also try using another set tuned to mw in close proximity to set under test and tune set under test along the mw band you should be able to pick up the signal from the ocs (will cause a null in the noise from other set) workes better with a few turns of wire wrapped around mixer /osc with one end drapped over the oter set.
the voltage supplyed to the nixer grid should be negative
rob t
if its made by hand it can be repaired by hand
