New Old Stock GEC 4045A matched pair, British military specification, both tubes bearing the broad arrow War Department mark and CV243 designation with batch code 1F. Manufactured by the General Electric Company, Wembley, England - large ST-bottle pentodes with silver finned plate construction and brown Bakelite base. Both tubes confirmed functioning well on functional test at reduced voltages. A genuinely rare pair of British military-issue tubes in unissued condition. Price per pair.
Tested on Tesla BM-215A | Uf = 5V | Ua = 150V | Ug2 = 50V | Ug1 = -48V
Note: test conditions are below full rated spec for this type - results confirm both tubes are functioning and closely matched.
| Parameter | Tube 1 | Tube 2 |
|---|---|---|
| Ia (mA) | 37 | 39 |
4045A = CV243
Shipped via registered airmail with tracking for secure delivery.
Other international shipping options are available upon request.
For US buyers: Import duties and customs fees are covered by the seller. Shipment is sent DDP (Delivered Duty Paid). Buyer will not be charged additional import fees.
GEC NOS 4045A / CV243 military pair - broad arrow marked, batch matched, never issued.
SKU: wooden_box