Desperate. I need .27 ohm 1 watt resistors

[ghostmechanic]

Like it says. I'm in the middle of repairing a car audio amp that's no longer made. I ordered all of the FETs & voltage regulators to repair it & then realized 2 of the power resistors for the output stage on 1 channel are bad. I called Mouser back & explained the situation & they told me there's nothing they can do & it would cost me $8 to ship them(not doing it because of principle). They are 1 watt metal film, axial lead .27 ohm, 5% tol. resistors. Nothing special.

I'll trade for 2 of them. Buy them. Or pay shipping. Whatever.

I know this isn't a car audio or for sale/wanted forum but I figured I'd get more help here.

Thanks in advance.

[Rodney]

If you have adequate room and some nicrome wire, just take a large value resistor and wrap 0.27 ohms of nicrome over the outside of it and cover with shrinkwrap.

[village_idiot]

Mouser has wirewound power resistors in stock for less than $2.00 each.
http://www.mouser.com/Search/ProductDetail.aspx?qs=sGAEpiMZZMuQ5%2fsBR7SoAqzvTj V2fG699qn8h5B%252bfzE%3d

I'm sure Digikey would have them too. Sorry I don't have any other parts to order at this time.

[tadawson]

I think the point was that he forgot them on his original order, Mouser couldn't add them to the order, and he is chapped that he would have to pay another $8 or so shipping for a second order, not that they don't have them . . . .

I can probably get them locally here in the Dallas area, but since there is no hint as to where this guy is located, it might cost just as much to ship them . . .

- TIm

[andrew b]

I'd be tempted to buy a little spool of nichrome wire. My question would be "how do I fix the nichrome wire, can it soldered"?

It would choke me to cough up $8 postage for a 10 cent item :censored:

[Brandano]

or you could wire 4 * 1.08 ohm 1/4 W in parallel. (I suspect if that 0.27 figure is right some 1 ohm resistors would do). Or 8 * 2.16 ... the load will get spread across the resistors, and it will level up across them as a result of the temperature rise.

[rich smith]

Nichrome wire is not a good choice for DIY resistors because it is hard to get and impossible to solder. Copper wire is best for .25 ohms and available everywhere. Probably pull some from an old radio etc..

[ghostmechanic]

I think the point was that he forgot them on his original order, Mouser couldn't add them to the order, and he is chapped that he would have to pay another $8 or so shipping for a second order, not that they don't have them . . . .

I can probably get them locally here in the Dallas area, but since there is no hint as to where this guy is located, it might cost just as much to ship them . . .

- TIm
Yep. Exactly.

[village_idiot]

Sorry, didn't read that far. Sometimes that's the problem with companies that ship almost immediately. I know I do not have any around the shop.

[pldaniels]

At least it's not $32 USD+ shipping :( Have had a few times where I've purchased a bunch of stuff from digi or mouser, only to close the order and 10 minutes later in the workshop I realise I forgot something *sigh* (10 day delivery, $30 minimum shipping from US -> AU *ouch*)

As for the resistors, if you had some 0.1R carbon 1W units you could always do the notch-cutting method (yes, it works, though normally it's to trim a 5% down to 1%, or 1% to 0.1% :D

[ghostmechanic]

Ok, none of the DIY solutions listed above are an option. I want to replace the resistors with as close to the same as what's in the amp now. These amps are collector's items now & I want to retain as much originality as possible. I had already thought about using 4 1/4 watt resistors but I don't have the room & again it would be way to obvious to just about anyone that opened it up if I resell it. Same with the sand cast resistors. I found what I'm looking for. Well, I just choked up the shipping cost actually. I just ordered a bunch more crap for (hopefully) future projects. Thanks everyone for the help.