AD1/350 was the Telefunken designation for their higher quality version of AD1, capable to replace any AD1, at classic 250V working point, but also it may be operated up to 350V, in order to bring the tube in a range with better efficiency and additional output power resulting from it, yet without increasing dissipation. This higher working point, with historic versions, it will initially work, but the tubes may develop grid current unexpectedly.
EML AD1/350 however is fully free of grid current at any operation point, also at high use hours as well.
Though it is electrically not identical, any existing 2A3 circuit diagram can be used, provided there is the 4 Volt heater voltage available.
We have a version with the vintage 8pin Side socket, and with the 4Pin UX4 base.

 Tụ Jantzen Alumen Z-Cap 10uf / 100VDC
Tụ Jantzen Alumen Z-Cap 10uf / 100VDC  Cuộn cảm Jantzen Cross Coil 0.82mH/ 16AWG
Cuộn cảm Jantzen Cross Coil 0.82mH/ 16AWG  Tụ Jantzen Standard Z-Cap 18uf / 400V
Tụ Jantzen Standard Z-Cap 18uf / 400V  Cuộn cảm Jantzen Air Coil 1.2mH/ 18AWG
Cuộn cảm Jantzen Air Coil 1.2mH/ 18AWG  JJ ECC82 / 12AU7 tube - Gold Pin
JJ ECC82 / 12AU7 tube - Gold Pin 





 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				 
				