Major causes of "raspy sound" are (after deteriorated audio tubes): low B+ voltage; incorrect grid bias; and a faulty loudspeaker.
Thassit . . . . . in a triple blind testing . . . . . and they are ALL fine . . . . . so I just may be in some deeeeeeeeeep doo-doo ! . . . |
:The "silver mica disease", AFAIK, only afflicts IF transformer units that use fixed capacitors with tunable inductors. So, your set, not having this sort of design (since it uses fixed inductors and compression-adjustment capacitors), should not be affected by SMD.
:
:Major causes of "raspy sound" are (after deteriorated audio tubes): low B+ voltage; incorrect grid bias; and a faulty loudspeaker.
:
:
: :Thanks, guys. This is quite helpful. : :  : : : : :Sir Ralph Ceeeeeeeeee. . . . . : : : : : :Fust "qwerstion" is if this unit is a "new kid on the block" to you or one that you have been using or at the least, being : : :set aside, and was working fine the last time listened to ? : : :Then, if my burden to bear . .in repair, would be confirming that the problem was still presenting itself if it was receiving : : :a pristine audio source to amplify. : : :With that source being akin to the "line level" RCA style of output jacks on the back of a CD /Video player or even an old : : :school Vee Cee Ruh. ( Thats matching up in the higher Z range and NOT down in the ~32 omegas of an earphones output jack.) : : :You connect across the extreme ends of the volume control, mating grounds, and then start evaluating resultant audio at all levels. : : :This then eliminates the frontal RF thru to the detector circuits aspects of consideration . : : :Somehow . . . . the one strongest thought that comes to mind with me, with your magical term of "raspy" is being a warped, : : :dragging, bottoming out or torn cone on the speaker. : : :Sub in another . . . . or if you end up physically pulling the speaker , have the cone facing straight up and forcefully slam : : :the magnet/field coil end into your palm. : : :A good speaker will exhibit a very-very subtle low thump, while a bad speaker will come out with a squeak/drag or splatter noise. : : : :TIP: : : : :As hard as I am progressively increasing my multiple slams, my palms inner phlanges/metacarpal and upper trap-cap-ham : : :bones have revolted with pain. : : :I now slip off one of my rubber heeled shoes and let it receive the brunt of abuse. : : :Palm now says a h h h h h h h h h . . . why didn't you do that sooner ! : : : :Thassit . . . . . : : : : : : : : : : : : : :73's de Edd : : :  : : : : : : : : : :"Then just think of your three best friends — if they’re okay, then it’s you. " : : : : :I HAVE thought of my 3 best friends . . . . and even increased on upwardly to nine for evaluation . . .for analysis : : in a triple blind testing . . . . . and they are ALL fine . . . . . so I just may be in some deeeeeeeeeep doo-doo ! . . .  <: : : :? ? ? ? ? : : :Ref to: : : : : :> > > |
:
:
:
::The "silver mica disease", AFAIK, only afflicts IF transformer units that use fixed capacitors with tunable inductors. So, your set, not having this sort of design (since it uses fixed inductors and compression-adjustment capacitors), should not be affected by SMD.
::
::Major causes of "raspy sound" are (after deteriorated audio tubes): low B+ voltage; incorrect grid bias; and a faulty loudspeaker.
::
:
:
:
:Major causes of "raspy sound" are (after deteriorated audio tubes): low B+ voltage; incorrect grid bias; and a faulty loudspeaker.
:
Audio tube check 62%; B on battery pack 92V; Going to check speaker. Thanks