| Brand | Signal Electric |
|---|---|
| Model | R21 |
| Country of Origin | United States |
| Product Line | Loose Coupled Receiving Transformer |
Check the listing for details. 1919 Signal Navy Type Loose Coupler Radio Tuner From Legendary Muchow Museum. Made in United States. Listed at 750.00 USD. Two things distinguish this R21 from others. The second is that it has a graduated wood rule running along the baseboard between the front standard and primary housing. This enables the operator to know exactly where to position the moving secondary coil when re-tuning a transmission once the coil has been repositioned.
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