32 pcs PL504 Telefunken NOS GRAAF GM200 OTL Matched 2x16 pcs

32 × Telefunken PL504 NOS Vacuum Tubes – Matched in Two Groups of 16 for GRAAF GM200 OTL

This listing is for a complete set of 32 Telefunken PL504 NOS (New Old Stock) vacuum tubes, matched in two groups of 16 tubes for the GRAAF GM200 OTL amplifier.

Condition and Testing

These are unused NOS tubes. All tubes have been tested on a calibrated Tesla BM215M tube tester under the following conditions:

• Anode voltage (Va): 100 V

• Screen grid voltage (Vg2): 100 V

• Control grid voltage (Vg1): −6 V

All tubes measure 150 mA ±5% under these test conditions. Matching is based on measurements taken on the same tester under identical conditions.

Measurement Disclaimer

Tube readings depend on the tester, its calibration, the test method, and the applied operating voltages. Results obtained on other testers or under different operating conditions may therefore differ from our measurements.

The stated measurements and matching apply specifically to our calibrated Tesla BM215M and the test conditions listed above. Identical readings or matching results on other equipment or at different operating points are not guaranteed.

Please review the description and test conditions carefully before purchasing, as we do not offer returns. Readings and matching results may vary between testers and operating conditions. These differences alone do not indicate a fault with the tubes and are not considered grounds for a claim.

If you have any questions, please contact us before placing your order.

Quantity

The price is for the complete set of 32 tubes, arranged in two matched groups of 16.