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  1. Penta Laboratories 4CX350A

    Penta Labs 4CX350A: Robust Power for Audio & RF. While externally identical to the 4CX250B, it boasts a ruggedized internal construction for improved durability and service life. Rugged internal construction for enhanced reliability and tube life.

    eBay

  2. Siemens 4CX250B (7203) NOS Valve Tube

    Able to provide you with your orders quickly and efficiently. We have 45000 sq ft storage.

    eBay

  3. STC 4CX250B NOS VALVE TUBE

    Able to provide you with your orders quickly and efficiently. We have 45000 sq ft storage.

    eBay

  4. RE025XA TESLA NOS 4CX250B Transmitting Tetrode Czechoslovakia

    One (1 pcs) RE025XA TESLA NOS NIB 4CX250B. Made in Czechoslovakia.

    eBay

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