Allen Bradley RESISTORS
Quantities of these "New Old Stock" carbon composition resistors are limited, production has now ceased in the USA. Allen Bradley resistors have a huge following of D.I.Y valve hi-fi builders and guitar amp enthusiasts. A huge amount of old manufactured hi-fi were built using these resistors, hence these antique carbon resistors are close to the hearts of many. They were used heavily in vintage Fenders, Marantz, etc. Allen-Bradley is considered by some to be the best example of this type of resistor with Stackpole and IRC close behind, these carbon composites are equal in quality to those found in most classic valve equipment.
Carbon Composition Resistors particularly those manufactured by Allen Bradley are becoming more scarce and are in high demand due to their unique characteristics.
They are known for their very clean and natural sound. Composite resistors differ from film resistors in that they consist of a little tube with a composite carbon resistor material inside. This makes the resistance, so you only have a few mm of material in the signal. A film resistor is made by carving a channel into a carbon (or metal) film on a glass or ceramic tube, resulting sometimes in meters (feet) of material in the signal! Also a film resistor always has inductance, composite resistors don't.
Because of their very good sound I can recommend them on all places. In the signalpath of amps, in the RIAA correction, cathode resistors, low power anode loads, etc. They are highly recommended in solidstate electronics. Transistors and metal film resistors are much too harsh together.
If you are looking for a low cost, reliable, musical resistor, look no further.
Allen Bradley RESISTORS special treatment method
As stated Allen Bradley resistors are carbon composite, being made of an organic material they do have the tendency to absorb water from the atmosphere. This absorption can increase the actual resistance of the component, hence the slightly higher than normal tolerance published on this page. To fix this simply remove the water from the component and seal it. The best method is to place the resistor/s on a baking tray set, your oven to 80 degrees centigrade and leave in the oven for 8 hours. The secret is to remove the mositure slowly if you rush it it will become noisy in circuit. Once cooked seal the body of the component in Shellack (preferably the flakes) to stock any further water absorption. At the end of this procedure you will have a much lower noise, more closely tolerance resistors. Special thanks to Colin Cornish for this excellent tip.
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1W ALLEN BRADLEY RESISTORS - available in the following values: (R=1ohm, 1K2=1200ohms) price: £0.85 each +vat +p&p

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Material:
Wattage:
Error Ratings:
Body Color:
Size (1W):
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Carbon composite
1W
10% - 20%
Dark brown
(BODY) diameter-5.5mm, length-14.5mm. (LEAD) diameter-0.8mm, length-38mm
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12R 15R 18R 22R 27R 33R 39R 47R 51R 56R 62R 68R 82R 91R 100R
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120R 150R 160R 180R 200R 220R 270R 300R 330R 360R 390R 470R 560R 620R 680R 820R
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1K 1K1 1K5 1K6 1K8 2K 2K4 2K7 3K 3K3 3K9 4K7 5K6 6K2 6K8 7K5 |
9K1 10K 12K 15K 18K 20K 22K 27K 33K 39K 43K 47K 51K 56K 62K |
75K 82K 91K 120K 160K 180K 220K 300K 330K 510K 560K 620K 680K 820K 910K
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2W ALLEN BRADLEY RESISTORS - available in the following values: (R=1ohm, 1K2=1200ohms) price: £1.60 each +vat +p&p

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Material:
Wattage:
Error Ratings:
Body Color:
Size (1W):
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Carbon composite
2W
+/-5%
Dark brown
(BODY) diameter-8mm, length-148mm. (LEAD) diameter-1mm, length-35mm
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12R
13R
15R
18R
22R
30R
36R
43R
47R
51R
56R
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68R
75R
100R
110R
120R
150R
160R
200R
220R
270R
300R
330R
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390R
470R
560R
620R
750R
1K3
1K8
2K2
2K7
3K
3K3
3K6
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3K9
5K6
6K2
7K5
8K2
9K1
12K
13K
15K
18K
27K
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43K
47K
62K
100K
150K
240K
270K
330K
470K
560K
680K
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