Anybody who knows a source for fusible resistors in Europe, Where you can shop as a private person?😕
Thanks. But unfortunately the Farnell i know of, Will only accept businesscostumers, And I am only a poor private solderiron swinger.😛
What value do you need? The ones I got were I think 2.2 ohm, 1 watt. I have no use for them now so if they are what you need you can have them.
🙂Thanks for your kindness, But I need some 33 ohm, 1/4 watt. It is for an old amplifier, I am restoring. Maybe you know of an alternative solution/component?
both CPC and RS stock fusible resistors but not in that value 🙁 Farnell seems to hold 2watt ones not 1/4 watt.
As a note, I've never had a problem buying online from farnell as a private individual, buy through the web and they accept credit cards
The tyco part is FRN25J33R 33R 0.25watt wire ended. Quite where you would get a small quantity (1 or 2 ) I don't know
As a note, I've never had a problem buying online from farnell as a private individual, buy through the web and they accept credit cards
The tyco part is FRN25J33R 33R 0.25watt wire ended. Quite where you would get a small quantity (1 or 2 ) I don't know
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Farnell
The US division of Farnell, Newark.com, is selling to me a complete nobody (with 40 years in electronics under various employers) with no minimum buy. They are even shipping to me like it was a business address, Euro 3 minimum via UPS. What is wrong with (I don't know flags except olympics) Norway? The US Newark before Farnell bought them used to have a business only policy, but when I logged on the website and furnished a debit card number with cash behind it, no problem.
As far as easy fusing, look at the wire tables in the National Electric code. Fusing current for 30 ga is about 1 amp and it goes down from there. You can look in the Belden or alpha catalog, figure out what the 7 strands of wire are in your 24 ga wire scrap from a PC power supply, strip out a single strand, solder 2 cm between two terminal strip lugs, instant low value fuse. Don't try this on mains wiring, use a real registered fuse and fuse holder.
The US division of Farnell, Newark.com, is selling to me a complete nobody (with 40 years in electronics under various employers) with no minimum buy. They are even shipping to me like it was a business address, Euro 3 minimum via UPS. What is wrong with (I don't know flags except olympics) Norway? The US Newark before Farnell bought them used to have a business only policy, but when I logged on the website and furnished a debit card number with cash behind it, no problem.
As far as easy fusing, look at the wire tables in the National Electric code. Fusing current for 30 ga is about 1 amp and it goes down from there. You can look in the Belden or alpha catalog, figure out what the 7 strands of wire are in your 24 ga wire scrap from a PC power supply, strip out a single strand, solder 2 cm between two terminal strip lugs, instant low value fuse. Don't try this on mains wiring, use a real registered fuse and fuse holder.
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I don't think that fusing current for 30 AWG is 1 Amp. As it can carry 2 Amps with PVC insulation and 4 Amps with Teflon insulation (80C & 200C).
My fusing current chart does not go to that small a wire. But if I did my mental math correctly, 30AWG should fuse at just about 7 Amps.
I didn't think that NEC listed fusing currents.
My fusing current chart does not go to that small a wire. But if I did my mental math correctly, 30AWG should fuse at just about 7 Amps.
I didn't think that NEC listed fusing currents.
use the chart in the NEC, not my memory. I'm putting single strands in the transformer feeds to rectifier tubes. You can't even buy fuses rated that small, (200 ma) and they are certainly not rated for 475 V. 1/4 x 1 1/2 fuses only go up to 250 VAC. New rectifier tubes are not as failsafe as they were in the 1960's, and 475 v transformers are way more expensive.
NEC 2008 is a very big book, well over 800 pages! But I don't think that it references any wire smaller than 18AWG nor does it get into fusing current.
current tables
Okay, your right, NEC is not where I saw that. Alphawire.com is showing a table that allows 2A on 28 ga with 35 deg rise. Accompanying derating chart for more than one wire in cable. Fusing currents I have never seen specified but 5x10x "safe" gets you close. I seem to remember 1A on 30 ga was safe, whereever I saw it. Maybe belden, they're out of business aren't they (at least Newark doesn't push their product anymore)? I've been pulling 1 strand out of a 19 strand 20 ga wire for my tube recitifier to B+ transformer links. No red rectifiers, so I haven't tested to destruction yet. Circuit produces about 250 ma 450 VDC for an organ.
Okay, your right, NEC is not where I saw that. Alphawire.com is showing a table that allows 2A on 28 ga with 35 deg rise. Accompanying derating chart for more than one wire in cable. Fusing currents I have never seen specified but 5x10x "safe" gets you close. I seem to remember 1A on 30 ga was safe, whereever I saw it. Maybe belden, they're out of business aren't they (at least Newark doesn't push their product anymore)? I've been pulling 1 strand out of a 19 strand 20 ga wire for my tube recitifier to B+ transformer links. No red rectifiers, so I haven't tested to destruction yet. Circuit produces about 250 ma 450 VDC for an organ.
Belden was still in business as of Friday afternoon. Lots of major vendors carry Belden cables. Much of the Belden line is Audio, Video, TV or Communications related so check with vendors that sell this type of product.
If you are still looking (or again looking) for wire current or fusing charts, try searching:
"AWG Copper Wire Table"
"Current Carrying Capacity of Copper Conductors"
If you are still looking (or again looking) for wire current or fusing charts, try searching:
"AWG Copper Wire Table"
"Current Carrying Capacity of Copper Conductors"
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