View Single Post
Old 11th Mar 2008, 3:42 pm   #2
geofy
Retired Dormant Member
 
Join Date: Jun 2006
Posts: 1,798
Post Re: Vidor CN426 HENLEY

Hi Dave
The HT for this set should only be 90Volts from a battery, if it is from a mains supply this is set to high, are all the valve heaters alight, though if the HT is to high the heater voltage might be as well.

The various inter stage capacitors/resistors should be checked, one may be open circuit, ideally a I.F. signal should be injected to see if this gets through to the speaker, it could be the high HT is because the set isn't oscillating. A screwdriver tapped on the volume control tags should produce a crackle in the speaker to show the audio stage is working. Or a signal taken from here to another audio amp to show the R.F. I.F. is working if the fault is in the audio stage.

Geof
geofy is offline