19-11-2015, 11:27 AM
(18-11-2015, 11:06 PM)Refugee Wrote: The trimmer is either a core or a cap depending on the model.
No, well not to my way of thinking, at least ...
A trimmer is a trimmer is a trimmer and (primarily) affects the HF end of the band.
The device that affects the LF end of the band may be a core or a variable capacitor, the function of which is traditionally known as a padder, although it physically resembles a trimmer (but has a much higher capacity).
The term 'padder' seems to have fallen out of use since the widespread introduction of adjustable cores because referring to cores and trimmers still clearly defines the difference between the two functions.
(18-11-2015, 11:06 PM)Refugee Wrote: Perhaps I should have said aerial tuning.
Perhaps you should but, as I said in my previous post, we have not determined whether the aerial or oscillator circuits require attention, so you would still be jumping to conclusions which might not be justified and, more importantly, confuse the OP.
(19-11-2015, 08:01 AM)pwdrive Wrote: Some receivers have a separate antenna tuning capacitor as a user adjustable, RCA , Hallicrafters comms receivers spring to mind.....Any domestic examples apart from early TRFs ? (not car radios)
But not this one, Lawrence!
