anyone got any 1ohm 1% 1watt resistors in australia?

Started by ulysses, July 25, 2007, 10:32:44 PM

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ulysses

hey guys

does anyone know of a store in sydney that sells 1ohm 1% 1watt metal oxide resistors in australia?

i need two of them to bias the tubes in my amp and i dont really want to have to pay a $29USD fedex fee for a couple of 50c resistors :)

maybe someone would be kind enough to send me a couple via auspost? - paul is this the type of thing you keep on hand?  ;)

cheers
ulysses

the_random_hero

Grab a pack of 8 carbon films from Jaycar and use your DMM to see which is closest to 1 ohm.
Completed Projects - Modded DS1, The Stiffy, Toaster Ruby, Octobooster Mk. II, Pedal Power Supply

ulysses

yeah i was thinking of doing this - i actually bought a pack of 2 1ohm 1watts from jaycar last time i was in there - they were both 1.1ohm - i would have tested in store but they were plastic sealed.. looks like ill have to go back with my pointy ended multimeter probes :) poke my way through the plastic :)

cheers
ulysses

ecua


ulysses

Quote from: ecua on July 26, 2007, 12:42:02 AM
any possibility of paralleling the resistors?

not really feasable as its quite tight hanging off the power tube socket to ground. besides i think it would be messy to have two where only 1 was required.  ;)

cheers
ulysses

Paul Perry (Frostwave)

Selecting with a multimeter is OK if you are 100% sure your meter is much better than 1%.
ARE you 100% sure? :icon_rolleyes:

Shakal

I guess 100% is impossible... maybe 99%.

But the 1% are precision, they shoudn't ever has 1.1Ohm instead of 1Ohm... Why is that?

Paul Perry (Frostwave)

In Australia, the cheapest 1 ohm 1% resistor, is made by putting ten 10 ohm 1% metal film in parallel.
The 10 ohm is the smallest 1% metal film Jaycar carry (in packs of 8, for your inconvenience :icon_mad: )
Not to diss jaycar, we'd be stuffed without them!

the_random_hero

Quote from: Paul Perry (Frostwave) on July 27, 2007, 09:38:37 AM
In Australia, the cheapest 1 ohm 1% resistor, is made by putting ten 10 ohm 1% metal film in parallel.
The 10 ohm is the smallest 1% metal film Jaycar carry (in packs of 8, for your inconvenience :icon_mad: )
Not to diss jaycar, we'd be stuffed without them!

Wouldn't all those little manufacturing inconsistencies start adding up then? My opinion on Jaycar has greatly improved in the last day or two, I managed to become a registered business with them so I get trade discount. The guy who served me also builds stompboxes and was pretty cool.
Completed Projects - Modded DS1, The Stiffy, Toaster Ruby, Octobooster Mk. II, Pedal Power Supply

ulysses

Quote from: Paul Perry (Frostwave) on July 26, 2007, 09:01:38 PM
Selecting with a multimeter is OK if you are 100% sure your meter is much better than 1%.
ARE you 100% sure? :icon_rolleyes:

well its a fluke so i should hope so!

it is much quicker and much more stable at deciciding what value a part is - my old multimeter would stuff around for about a second with values going all over the place, it would then fluctuate more than i liked.

cheers
ulysses

ulysses

Quote from: the_random_hero on July 27, 2007, 05:04:38 PM
Wouldn't all those little manufacturing inconsistencies start adding up then? My opinion on Jaycar has greatly improved in the last day or two, I managed to become a registered business with them so I get trade discount. The guy who served me also builds stompboxes and was pretty cool.

i can pick a lot of holes in jaycar's parts selection. i presume its mainly profit motivated - but they claim to want to provide the best parts available - i am constantly having to order from other electronics stores in aust and overseas.

cheers
ulysses

Paul Perry (Frostwave)

So far as tolerances go - if you connect 1% resistors together in any pattern at all, the result is within 1% of the theory.
Some people could prove that mathematically for ALL cases, but even I canprove it for the parallel & series case (well, for small N  :icon_smile: ).

As for Jaycar, they have chosen to try to sell electronic stuff to the masses. Unfortunately, the number of people who think tricked up cars & fart machines are cool, far exceeds the numbers of FX DIYers. And the stock range reflects this. Building FX takes a bit of planning. And, some parts are goijng to have to come from overseas - but at least if you get them from Steve at SmallBear, or your switches from Aron, there won't be a fedex charge.

ulysses

Quote from: Paul Perry (Frostwave) on July 27, 2007, 09:05:56 PM
As for Jaycar, they have chosen to try to sell electronic stuff to the masses. Unfortunately, the number of people who think tricked up cars & fart machines are cool, far exceeds the numbers of FX DIYers.

i went into jaycar the other day - the latest gadget on the counter was a stripper that sang and danced up and down and around a pole to porn music - "ill take some resistors and the dancing stripper thanks"

cheers
ulysses

the_random_hero

I've just been ordering 3PDT's from eBay at the moment - $10 each for CIC-branded switches, which isn't too bad I guess. While I've got some money to blow, I ordered a heap of stuff in bulk, so that should keep me going for quite a few more builds.
Completed Projects - Modded DS1, The Stiffy, Toaster Ruby, Octobooster Mk. II, Pedal Power Supply