A now-uncommon British output pentode surviving in the original blue "Master Valve" box - a type that has quietly disappeared from available supply and rarely turns up unplayed. Ia above nominal at 110%.
Uh = 6.3V | Ua = 250V | Ug1 = -15.5V | Ug2 = 250V
| Parameter | Result | Nominal (100%) |
|---|---|---|
| Ia (mA) | 79.0 | 72.0 |
| S (mA/V) | 4.8 | 5.0 |
EL35 = CV1052
No other direct equivalents confirmed. The KT61 is a beam tetrode with a broadly similar operating point but different construction - not a drop-in substitute.
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.
Mullard NOS in the original box - the EL35 is not a tube you find unplayed every day. If you need one, this is it.
SKU: black_box