| Name and Model Number | Blundell Vector |
| Country of Origin | England |
| Date of Manufacture | |
| Front Scales | {A[2 lines] B} { 2 templates } {C [ 2 lines] D, E [F, G, H] I} |
| Back Scales | None |
| Scale Length | 25 cm |
| Type of Rule | Instrument |
| Construction | Plastic |
| Area of Use | Electrical |
| Comment | Allows usual slide rule operations together with transformations
required in the use of real and complex electrical networks. Enables the following: (a) Conversion between polar and rectangular co-ordinates (b) Multiplication/division of complex quantities (c) Expressions of the form: sqrt (A12 + A122 + ...) (d) As (c) but where An are reciprocals. (e) Trig functions |
| Rarity | RRR |
| Donor | Collection of Rod Lovett |
| Match Number | 15 |
| Thumbnail |  |
| RR | = Rare -- 1 of 25 collectors has one; it may take a year to find an example in the marketplace. |
| RRR | = Very rare -- only very few known to collectors; may take several years before one comes up for sale. |
| RRRR | = Extremely rare -- a museum piece; unlikely that an example will ever come up for sale. |