#1
hello guys im finding a 25 ohm rheostat but its like finding a needle in a haystack :O can i get a linear or some other type of pot to replace it? i live in canada
#4
If it's just for a volume or tone knob or something, just get a 25 K ohm audio or linear pot..
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#5
need it for a little gem amp. its used as a volume knob.

note - its just 25 ohms not 25 k btw.
#9
Quote by Axecutioner
I'm pretty sure the 25 ohm rheostats are standard stock at most radio shacks


i live in canada radio shacks have been manipulated to "the source", which sells less circuit components
#10
Quote by Luxifer
i live in canada radio shacks have been manipulated to "the source", which sells less circuit components


Ya man, I remember when our radio shacks used to be good...
Ibanez SZ320
Peavey 6505+
Marshall 1960B
Dunlop Wah
Dano EQ
#11
so my main question is - can a 25 ohm rheostat be replaced by some kind of other pot?
#12
The big problem with swapping out a rheostat for a regular pot is power rating. Most pots are designed to handle more than a watt or so whereas rheostats handle a great deal more. For example, there are rheostats that control attenuation in my power attenuator. If I were to replace them with standard pots, instant overload of power and blown circuitry would result. In theory, they are almost identical though.
#13
I'm almost positive I've seen a 25 ohm rheostat at the source (I'm in canada, too..)

if not, get a 25k pot, and put a 22 or 27 ohm resistor is parallel with it, you'll get close to 22 or 27 ohms on the pot.

short of finding a proper rheostat, and assuming the power rating is suitable, I think that'd be one of your best options..
#17
Quote by Luxifer
i cant find the wattage rating...

http://runoffgroove.com/littlegem.html

it only says that its a 25 ohm rheostat for volume control.


Seeing as the amp's output is only 1/2 or 1W, I'd say the 12.5W rated rheostat would be sufficient. Need someone else to back this up though.
#19
Quote by a_man
Seeing as the amp's output is only 1/2 or 1W, I'd say the 12.5W rated rheostat would be sufficient. Need someone else to back this up though.


Concur. Get the 12.5watt.
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