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
|
120R
150R
160R
180R
200R
220R
270R
300R
330R
360R
390R
470R
560R
620R
680R
820R
|
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
|
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
|
43K
47K
62K
100K
150K
240K
270K
330K
470K
560K
680K
|
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