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 Australian supplier stocking 5 watt resistors, suitable for radio restoration?
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 Return to top of page · Post #: 1 · Written at 4:38:01 PM on 30 July 2016.
JamieLee's Gravatar
 Location: Clare, SA
 Member since 27 March 2016
 Member #: 1894
 Postcount: 510

Can anybody suggest, where I may be able to order online, a supply of resistors, suitable for using to replace old ones when restoring radios? Preferably in Australia.
2-5 watts if possible...
Any suggestions welcome.


 
 Return to top of page · Post #: 2 · Written at 5:05:05 PM on 30 July 2016.
GTC's avatar
 GTC
 Location: Sydney, NSW
 Member since 28 January 2011
 Member #: 823
 Postcount: 6763

Try :

EVATCO in QLD

WES in NSW


 
 Return to top of page · Post #: 3 · Written at 5:22:40 PM on 30 July 2016.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5401

That's rather unusual in its presentation?

To keep the inventory down and for the voltage rating, I stock mainly 1 Watt resistors; Which most of the supermarkets have. Under that wattage very few stocked, but you do need the odd one in the other types range to get closer to the resistances in AGC and odd transistor set ; 1920's Grid leaks: physical size.

5 & 10 Watt only replacing some field coils, although I have ordered in bigger "feed through" chassis mount types from RS.

2 & 3 watt Screens of some Little Nippers (10K) and the odd Cathode & odd Choke replacement.

Heavying up resistors can have serious consequences: It is often better to have back bias resistors & those often seen in plate circuits of rectifiers burn on fault than the transformer.

Note some of Steve's adds as well


 
 Return to top of page · Post #: 4 · Written at 6:36:46 PM on 30 July 2016.
JamieLee's Gravatar
 Location: Clare, SA
 Member since 27 March 2016
 Member #: 1894
 Postcount: 510

Thanks guys, yes I'd rather burn a resistor than a transformer!


 
 Return to top of page · Post #: 5 · Written at 7:21:59 PM on 30 July 2016.
JamieLee's Gravatar
 Location: Clare, SA
 Member since 27 March 2016
 Member #: 1894
 Postcount: 510

What type should I use, Carbon film or metal oxide?


 
 Return to top of page · Post #: 6 · Written at 8:54:00 PM on 30 July 2016.
Marcc's avatar
 Location: Wangaratta, VIC
 Member since 21 February 2009
 Member #: 438
 Postcount: 5401

I use both and really have had no issues. I try & avoid metal oxide in the RF section and that is also an area where wire wound should be avoided.


 
 Return to top of page · Post #: 7 · Written at 10:47:30 PM on 30 July 2016.
JamieLee's Gravatar
 Location: Clare, SA
 Member since 27 March 2016
 Member #: 1894
 Postcount: 510

Oh bugger, I just ordered a 500pc kit of metal oxide ones...
I tried just ordering the ones I needed, but the total was $10 less than their minimum order of $20, so they cancelled my order and refunded me, but I didn't learn of this until today and wasted a week waiting for nothing, so made an executive decision and ordered this kit for $69 U.S.with 7 each of 85 values from smallest to largest..
Reasoning.
Sure I'll be stuck with lot's I wont use, but I'll have all the values I need and odd-ball ones in case I require one and I can top up any I use more of etc.
Damn if I didn't get the wrong sort!
The RF section is the ones I want t replace mostly so I'll need to either try them anyway, or order carbon film ones now next week......


 
 Return to top of page · Post #: 8 · Written at 7:36:15 AM on 31 July 2016.
Tallar Carl's avatar
 Location: Latham, ACT
 Member since 21 February 2015
 Member #: 1705
 Postcount: 2175

Contact Stephen Savell. He supplies them.


 
 Return to top of page · Post #: 9 · Written at 11:05:31 PM on 20 September 2016.
Art's Gravatar
 Art
 Location: Somewhere, USA
 Member since 22 October 2013
 Member #: 1437
 Postcount: 896

The metal film resistors shouldn’t be any make or break in a radio, they are used in VHF/UHF.
They should be less noisy, and better temp coefficient, but I don’t know this for myself.

Every passive component is also every other passive component, and it’s fairly well known that
wire wound resistors make good inductors in RF circuits when you didn’t employ them that way!
So they will drag down oscillators, and especially for things like making up dummy loads,
can mismatch AC impedance even though they were the correct DC resistance.


 
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