Add to Cart Quick view Peter W. Dahl Custom Transformer Design Book with Drawings & Data to Build Many Popular Transformers and Chokes Reproduction Peter Dahl MSRP: Now: $19.99 Was: Peter W. Dahl Custom Transformer Design Book with Drawings & Data to Build Many Popular Transformers and Chokes Reproduction. Please see the pictures for a list of the many transformers in this... MSRP: Now: $19.99 Was: Add to Cart Quick view Qty in Cart: 0 Quantity: Decrease Quantity: Increase Quantity: Price: MSRP: Now: $19.99 Was: Subtotal: Add to Cart