Mullard PZ30, how's its Peak Inverse Voltage?

Kenneth Zhu · 17th September 2011, 03:26 PM

I by chance aquired several Mullard PZ30. They look like beefy full-wave rectifiers, with large cathoded and exaggerating plates, in comparison with the common GZ34 alike. TDSL site says that it can handle roughly 200mA but not indicating the PIV. Does anyone know its PIV or more detailed info about it? Thanks a lot.

AndreasS · 17th September 2011, 03:40 PM

Please look here:

PZ30 @ The National Valve Museum

Regards Andreas

Kenneth Zhu · 17th September 2011, 03:48 PM

Thanks. But it has mentioned anything about the PIV.

AndreasS · 17th September 2011, 04:04 PM

Pls. look in the RDH4, p. 1177 (Chapter 30.2 vi.)

Andreas

Kenneth Zhu · 17th September 2011, 11:46 PM

Many thanks. It seems that it doesn't appear in the table at the bottom of the page. In fact I want to build a bridge, so I need to know PIV to judge how hight the maximum RMS supply voltage could be. Usually in full wave rectifying mode this tube can only accept approximately 240V RMS at most with condenser input But as we know, for full-wave rectification, the PIV appear at both ends of the diode is roughy 3.14 times of output DC voltage, and but in bridge is 1.57 times, which means in bridge topology, it can be used to accomodate higher RMS input and yield higher DC voltage. But the key here is how much is its PIV so headroom can be arranged for its safe operation.

Gilgy · 18th September 2011, 02:42 AM

Quote:

... absence of a mains transformer ... configuration offered the choice of parallel connection directly fed from the mains ...

ahh, the good old days of rectified mains voltage

Disclaimer: never rectify mains voltage kids. It's hideously dangerous.

Kenneth Zhu · 18th September 2011, 03:00 AM

Yeah. I will prepare a separate power tranny for it, other than connecting it directly to the mains voltage. I appreciate its capability to handle large current and the Mullard brand.

17th September 2011, 03:26 PM	#1
Kenneth Zhu diyAudio Member Join Date: Sep 2003 Location: Deyang, Sichuan, P.R.China	Mullard PZ30, how's its Peak Inverse Voltage? I by chance aquired several Mullard PZ30. They look like beefy full-wave rectifiers, with large cathoded and exaggerating plates, in comparison with the common GZ34 alike. TDSL site says that it can handle roughly 200mA but not indicating the PIV. Does anyone know its PIV or more detailed info about it? Thanks a lot.

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17th September 2011, 03:40 PM	#2
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	Please look here: PZ30 @ The National Valve Museum Regards Andreas

17th September 2011, 03:48 PM	#3
Kenneth Zhu diyAudio Member Join Date: Sep 2003 Location: Deyang, Sichuan, P.R.China	Thanks. But it has mentioned anything about the PIV.

17th September 2011, 04:04 PM	#4
AndreasS diyAudio Member Join Date: May 2005 Location: near Duesseldorf	Pls. look in the RDH4, p. 1177 (Chapter 30.2 vi.) Andreas

17th September 2011, 11:46 PM	#5
Kenneth Zhu diyAudio Member Join Date: Sep 2003 Location: Deyang, Sichuan, P.R.China	Many thanks. It seems that it doesn't appear in the table at the bottom of the page. In fact I want to build a bridge, so I need to know PIV to judge how hight the maximum RMS supply voltage could be. Usually in full wave rectifying mode this tube can only accept approximately 240V RMS at most with condenser input But as we know, for full-wave rectification, the PIV appear at both ends of the diode is roughy 3.14 times of output DC voltage, and but in bridge is 1.57 times, which means in bridge topology, it can be used to accomodate higher RMS input and yield higher DC voltage. But the key here is how much is its PIV so headroom can be arranged for its safe operation.

18th September 2011, 03:00 AM	#7
Kenneth Zhu diyAudio Member Join Date: Sep 2003 Location: Deyang, Sichuan, P.R.China	Yeah. I will prepare a separate power tranny for it, other than connecting it directly to the mains voltage. I appreciate its capability to handle large current and the Mullard brand.

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