MKT4 7A2 AC/Pen APP4A V1683 MP/Pen KT42 Pen4VA A70B N40 P4VA BEAM TETRODE VALVE VARIOUS MANUFACTURERS

B5 based beam tetrode
Manufacturer: Osram

 The  MKT4/5 was a beam tetrode version of the earlier (1932) MPT4 output pentode and was intended as a plug-in replacementfor the discontinued MPT4.   . The beam tetrode version had the advantage of a lower distortion allayed to a higher output.  

There is a B7 based variant having an identical electrode cage but of course a differing valve base - tant pis!

In single ended audio configuration could provide an output of 2.5 Watts.

Picture of OSRAM MKT4 PENTODE FROM MAR 1949
OSRAM MKT4 PENTODE FROM MAR 1949
A beautiful example of this 5 pin balluster envelope MKT4 showing very good emission as you can see from the test data.
Stock Code: y35
Availability: 1 in stock
Delivery date: 1 week
£20.00
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