The HL41 is an externally screened mains operated amplifier triode of medium impedance. It was designed as an oscillator or RCC amplifier. At the time Mazda had a passion for applying metalisation to valves even if it was not indicated electrically.
This device was aimed at being the first audio stage in a TRF radio receiver or a superheat with external signal detection. The HL41/DD added a pair of signal diodes to the triode amplifier.
The reverse is plain zinc paint.
The classic envelope is 33 mm in diameter and, excluding the MO base pins, is 79 mm tall.
References: Datasheet, 1040 & 1043. Type HL41 was first introduced in 1938.
We specialized in thoroughly tested
and screened quality vacuum tubes.
We have various type of valves and tubes testers
– Amplitrex AT1000 Advance Digital Tube Tester,
– Hickok 752a tube tester,
– AVO Type 160
We have been in the valve and tube Business Since 1970’s.
Previously we were better Known as a Wholesaler,
but recently, We are offering more retail items.
All item are tested and guaranteed, supplied
We have Approximately 3,00,000 Valve and Tubes Stock
Custom duties and taxes is the responsibility of the buyer in their country
If the address is away from city, town there is extended area surcharge, So
Kindly confirm your orders before making checkout.
PLEASE CONTACT US IF YOU REQUIRE FURTHER INFORMATION ABOUT THIS VALVE.