20-11-2012, 10:53 PM
Noise limiter: bearing in mind that we know that some modifications have taken place with this receiver, the noise limiter cct. might have undergone a modification. Over the years there have been countless designs for noise limiters of the 'pulse suppression' type - of which the one in the AR88 is an example.
So, it might be a good idea first to examine the wiring and components around the N/L valve(s) and compare what you find there to what is shown in the cct. diag.
Changing the subject completely - and this is simply a sporadic afterthought - if you find that you need to replace the PSU reservoir / filter capacitors, please note that most of them do not have their -ve plates connected to chassis . . . an exam. of the cct. diag. reveals why. I mention that since that has been known to catch some people out . . . . .
Al.
So, it might be a good idea first to examine the wiring and components around the N/L valve(s) and compare what you find there to what is shown in the cct. diag.
Changing the subject completely - and this is simply a sporadic afterthought - if you find that you need to replace the PSU reservoir / filter capacitors, please note that most of them do not have their -ve plates connected to chassis . . . an exam. of the cct. diag. reveals why. I mention that since that has been known to catch some people out . . . . .
Al.
