Page 1 of 1

potentiometer question

Posted: Mon Aug 05, 2013 11:44 pm
by ryan summit
hey im fixin the treble knob
on an old sears bass amp
the knob lug broke off at some point
ive never done this before
and im glad i didnt try it on one of my amps
so i figured the values would be on the back of it
and after diggin it out from behind the tranformer
its nothin i could understand
can you guys tell me what to replace this with
Image
Image
its got the #e305 on it
thanks

Re: potentiometer question

Posted: Tue Aug 06, 2013 1:00 am
by Jero
Get a multimeter and measure it. What model is the amp? I've had a few of those old Sears ones.

Re: potentiometer question

Posted: Tue Aug 06, 2013 1:05 am
by ryan summit
60 bxl bass amp
it actually sounds pretty good
Image

Re: potentiometer question

Posted: Tue Aug 06, 2013 9:24 am
by TweedBassman
yeah you need a meter bro

Re: potentiometer question

Posted: Tue Aug 06, 2013 12:14 pm
by Jero
WOAH that's a weird one. Is it loaded with a Jensen? I used to have the 60 bxl, but mine looked way different...

far left with the ghost skull...
Image

Re: potentiometer question

Posted: Tue Aug 06, 2013 2:52 pm
by ryan summit
ahh look at you
is this a jensen?
Image
its solid state if that makes a difference
i think yours is 68 or somethin
this ones from the 70s

Re: potentiometer question

Posted: Tue Aug 06, 2013 7:03 pm
by the_carl
The 305 could mean it's a 3 meg pot, since some pots get marked like capacitors. Edit: Could the E be an F or B? I can't actually make out any of the markings in the pic. Dunno what E would be, but F was used for reverse audio taper and B for linear.

I'd recommend a cheap multimeter anyway, they're super handy to have around for guitar/amp/pedal stuff.

Re: potentiometer question

Posted: Wed Aug 07, 2013 11:02 am
by TweedBassman
for the speaker, look for a 6 digit code stamped somewhere. then googler 'speaker code identification' or something, there's a list of manufacturers and how to decode the numbers.

Re: potentiometer question

Posted: Wed Aug 07, 2013 11:06 am
by ryan summit
theresno 6 digit on the basket
theres one on the cone starts 106
would make it allen-bradley '67 i guess
the week between xmas and new years