Heater Wiring

Glowin Plates · 27th January 2011, 05:37 PM

Hi Gang

Is it possible to wire two 12V heaters (12AX7) in parallel in order to use a 6V supply?
Given the supply has ample current.

nigelwright7557 · 27th January 2011, 05:41 PM

The 12ax7 has split heaters.
They can be wired as one 12v6 series or two 6v3 parallel.

BigE · 27th January 2011, 05:54 PM

How?

Use Pins 4 and 5 for 12V6, and 9/4 and 9/5 for 6v3? (with 9 as return)?

thanks.

boywonder · 27th January 2011, 05:57 PM

Yes, pins 4&5 for 12.6V, and 4/5 connected together and pin 9 for 6.3V.

TDSL Tube data [12AX7]

nigelwright7557 · 27th January 2011, 06:03 PM

Quote:

Originally Posted by boywonder

Yes, pins 4&5 for 12.6V, and 4/5 connected together and pin 9 for 6.3V.

TDSL Tube data [12AX7]

Yes.

27th January 2011, 05:37 PM	#1
Glowin Plates diyAudio Member Join Date: Feb 2004 Location: Victoria	Heater Wiring Hi Gang Is it possible to wire two 12V heaters (12AX7) in parallel in order to use a 6V supply? Given the supply has ample current.

27th January 2011, 05:41 PM	#2
nigelwright7557 diyAudio Member Join Date: Apr 2008 Location: Carlisle, England	The 12ax7 has split heaters. They can be wired as one 12v6 series or two 6v3 parallel. __________________ http://www.murtonpikesystems.co.uk PCBCAD40 pcb design software.

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27th January 2011, 05:54 PM	#3
BigE diyAudio Member Join Date: Aug 2008 Location: Toronto	How? Use Pins 4 and 5 for 12V6, and 9/4 and 9/5 for 6v3? (with 9 as return)? thanks.

27th January 2011, 05:57 PM	#4
boywonder diyAudio Member Join Date: Jan 2008 Location: So.Cal.	Yes, pins 4&5 for 12.6V, and 4/5 connected together and pin 9 for 6.3V. TDSL Tube data [12AX7]

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