UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - GZ34

FERNSEH · 17th Oct 2019, 1:17 am

In 1961 Mullard introduced an improved version of the PY32 TV HT rectifier diode. The new valve was the PY33 and it had an improved cathode oxide coating which offered a reduced forward voltage drop.

From the valve museum: http://www.r-type.org/exhib/aaa0167.htm

The question is, did later production Mullard GZ34 rectifier valves also benefit from the improved cathode oxide coating?

DFWB.

17th Oct 2019, 1:17 am	#13
FERNSEH Dekatron Join Date: Mar 2005 Location: Gateshead, Tyne and Wear, UK. Posts: 7,444	Re: GZ34 - recommended brands? In 1961 Mullard introduced an improved version of the PY32 TV HT rectifier diode. The new valve was the PY33 and it had an improved cathode oxide coating which offered a reduced forward voltage drop. From the valve museum: http://www.r-type.org/exhib/aaa0167.htm The question is, did later production Mullard GZ34 rectifier valves also benefit from the improved cathode oxide coating? DFWB.