Aikido preamp transformer question

JackM11 · 13th November 2012, 06:33 PM

Hi,

I have an old Aikido 9pin board and need a power supply for it. The board is configured for 2 6CG7 and 2 6922.
I already have a Radio Shack 6.3v transformer.

I am looking at the Glassware PS-5 B+ Power Supply Kit and it seems to work. It needs a 5v supply for the 5Y3 tube. I guess I need a B+ of 200-300V for the preamp.
Can anyone suggest a transformer for the application? Also, what is the fuse needed for this preamp?

Thanks in advance for any suggestions.

wicked1 · 13th November 2012, 06:49 PM

I'm using a hammond 270dx for my aikido preamp. It's a bit larger than it needs. 550ct, and I get about 310v b+
I've got a hammond 269jx in my aikido phono. It's probably a better choice. 500vct. I get about 250v b+

Wirezz · 10th December 2012, 02:13 AM

I used a custom wound transformer for a B+ of 280v on my all 12Au7 Aikido. I would recommend a custom wound transformer as it can be built to your exact requirements (both power and voltage) and may work out cheaper then some of the higher end hammond stuff.

cjkpkg · 10th December 2012, 01:34 PM

I can highly suggest also either the PS-3 or PS-4 if you must have tube rectification.

As far as transformers
Allied Electronics 6K88VG
Allied Electronics 6K56VG if you are using tube rectifier

Or any Edcor that makes at least 500VCT either with or without the 5V rectifier winding.

Most tube centric power transformers will come with a 6.3V tap.

You could also look at Antek for toroidal - in the 250V range since most of the antek units are not center tapped.

DC Heaters will go a long way for a quiet preamp. AC will work if set up properly but DC tends to be easier to manage.

13th November 2012, 06:33 PM	#1
JackM11 diyAudio Member Join Date: Sep 2007	Aikido preamp transformer question Hi, I have an old Aikido 9pin board and need a power supply for it. The board is configured for 2 6CG7 and 2 6922. I already have a Radio Shack 6.3v transformer. I am looking at the Glassware PS-5 B+ Power Supply Kit and it seems to work. It needs a 5v supply for the 5Y3 tube. I guess I need a B+ of 200-300V for the preamp. Can anyone suggest a transformer for the application? Also, what is the fuse needed for this preamp? Thanks in advance for any suggestions.

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
Aikido preamp muting	dine1967	Tubes / Valves	2	1st July 2008 02:30 PM
basie+aikido preamp	magnum_1	Tubes / Valves	11	26th December 2006 04:05 AM
Aikido Preamp	Bengali	Tubes / Valves	21	12th November 2006 03:19 PM
Car preamp with Aikido	Simpleton	Tubes / Valves	3	19th March 2006 01:20 PM
preamp gain and output transformer question	vlljpior	Tubes / Valves	2	18th January 2005 07:05 PM

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


	Please consider donating to help us continue to serve you. Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving

13th November 2012, 06:49 PM	#2
wicked1 diyAudio Member Join Date: Jan 2008	I'm using a hammond 270dx for my aikido preamp. It's a bit larger than it needs. 550ct, and I get about 310v b+ I've got a hammond 269jx in my aikido phono. It's probably a better choice. 500vct. I get about 250v b+

10th December 2012, 02:13 AM	#3
Wirezz diyAudio Member Join Date: Nov 2011	I used a custom wound transformer for a B+ of 280v on my all 12Au7 Aikido. I would recommend a custom wound transformer as it can be built to your exact requirements (both power and voltage) and may work out cheaper then some of the higher end hammond stuff.

10th December 2012, 01:34 PM	#4
cjkpkg diyAudio Member Join Date: Aug 2008 Location: Roswell GA	I can highly suggest also either the PS-3 or PS-4 if you must have tube rectification. As far as transformers Allied Electronics 6K88VG Allied Electronics 6K56VG if you are using tube rectifier Or any Edcor that makes at least 500VCT either with or without the 5V rectifier winding. Most tube centric power transformers will come with a 6.3V tap. You could also look at Antek for toroidal - in the 250V range since most of the antek units are not center tapped. DC Heaters will go a long way for a quiet preamp. AC will work if set up properly but DC tends to be easier to manage.