Help! el34 8pin to 7pin conversion

kantoking · 10th March 2009, 11:07 AM

Hello all!

Can anyone point me towards some info on what is required to change my amp from using 8pin el34s to accepting 7pin el34s?

I am new to the whole tube thing (first amp) and dont know much, if you need any more info please let me know. I have already opened the amp up and pin6 (missing pin) is definitely wired in and doing something. I am excited to learn about tubes, and looking forward to doing this modification!

Geek · 10th March 2009, 11:26 AM

Hi,

EL34 uses an octal socket, regardless if it has a pin missing. No need to rewire anything.

The ones with the 8th pin don't have it tied internally usually.

Cheers!

Steerpike · 10th March 2009, 11:27 AM

Pin 6 on the EL34 is not used. That's how an EL34 is.

Some manufacturers use an unconnected pin on the tube socket as a convenient 'unused' soldering tag, to mount some other component (resistor, etc) or as a junction point. It doesn't mean that it is supposed to carry any current to or from the tube.

10th March 2009, 11:07 AM	#1
kantoking diyAudio Member Join Date: Mar 2009	Help! el34 8pin to 7pin conversion Hello all! Can anyone point me towards some info on what is required to change my amp from using 8pin el34s to accepting 7pin el34s? I am new to the whole tube thing (first amp) and dont know much, if you need any more info please let me know. I have already opened the amp up and pin6 (missing pin) is definitely wired in and doing something. I am excited to learn about tubes, and looking forward to doing this modification!

Thread Tools	Search this Thread
Show Printable Version Email this Page	Search this Thread: Advanced Search

Similar Threads
Thread	Thread Starter	Forum	Replies	Last Post
6L6 to EL34 conversion	bereanbill	Tubes / Valves	3	11th February 2009 04:55 PM
Velleman K4040 conversion from EL34's to KT88's	GeorgeK	Tubes / Valves	6	8th February 2009 07:12 PM
FS NOS Teflon 7pin sockets	shane_ceglar	Swap Meet	0	23rd October 2007 06:16 AM
what's the purpose of pins 3 and 7 in an 8pin VR tube?	jarthel	Tubes / Valves	7	9th May 2007 01:42 PM
Miniature 8pin socket	thomasholley	Tubes / Valves	4	29th February 2004 03:10 AM

New To Site?	Need Help?
Register to Participate Search Privacy Statement Contact Us	Frequently Asked Questions Did you forget your password? Mark Forums Read

10th March 2009, 11:26 AM	#2
Geek diyAudio Member Join Date: Sep 2004	Hi, EL34 uses an octal socket, regardless if it has a pin missing. No need to rewire anything. The ones with the 8th pin don't have it tied internally usually. Cheers!

10th March 2009, 11:27 AM	#3
Steerpike diyAudio Member Join Date: Jan 2006 Location: Johannesburg, South Africa	Pin 6 on the EL34 is not used. That's how an EL34 is. Some manufacturers use an unconnected pin on the tube socket as a convenient 'unused' soldering tag, to mount some other component (resistor, etc) or as a junction point. It doesn't mean that it is supposed to carry any current to or from the tube.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)