Tube preamp vs. solid state - Page 2

bushroot · 30th October 2006, 08:21 AM

So, I've done some reading about the Aikido. I'm in, now how do I build the thing? I found the PCBs and it looks like I'll need 9-pin 12AN7 tubes to get my 30db of gain. Where can I find more detailed information?

bushroot · 30th October 2006, 09:09 AM

err...12AX7...I think...have to find the page again.

Original Burnedfingers · 30th October 2006, 10:33 AM

If your wanting a good line stage I would look for a tube that will give an mu of no more than about 36. The 6FQ7,6SN7,6N1P,and 6922 fall in this range. The 12AX7 would be way too much gain. More is not necessarily better here. I have built Aikido's with these tubes as input tubes and they sound quite nice.

Original Burnedfingers · 30th October 2006, 10:35 AM

Quote:

So, I've done some reading about the Aikido. I'm in, now how do I build the thing? I found the PCBs and it looks like I'll need 9-pin 12AN7 tubes to get my 30db of gain. Where can I find more detailed information?

Check the group buy Aikido thread by Bas Horneman.

Poll..anyone interested in an Aikido linestage PCB group buy?

kevinkr · 30th October 2006, 07:52 PM

My post was in reference to a pc board, and not an entire cloned pre-amp, the buyers comments were quite similar to comments echoed on this thread.

I would say the Aikido pre would be a good choice. Personally I prefer transformer coupled dht based line stages, but they are complex and for the unitiated there are quite a few pitfalls.

See the pre-amp pages on my site if you are interested.

http://www.kta-hifi.net/projects/pre_page/pre_page.html

You want the first link.

jarthel · 31st October 2006, 05:48 AM

Quote:

Originally posted by burnedfingers
If your wanting a good line stage I would look for a tube that will give an mu of no more than about 36. The 6FQ7,6SN7,6N1P,and 6922 fall in this range. The 12AX7 would be way too much gain. More is not necessarily better here. I have built Aikido's with these tubes as input tubes and they sound quite nice.

I'm surprised no one has pointed to tubecad.com which is the original website for the design. he sells pcbs too and you'll find more info on the aikido on his site.

bushroot · 31st October 2006, 07:16 AM

Found the tubecad site and E-mailed John already. Seems like a nice enough guy.

30th October 2006, 07:52 PM	#15
kevinkr diyAudio Moderator Join Date: Sep 2004 Location: Boston, Massachusetts Blog Entries: 6	My post was in reference to a pc board, and not an entire cloned pre-amp, the buyers comments were quite similar to comments echoed on this thread. I would say the Aikido pre would be a good choice. Personally I prefer transformer coupled dht based line stages, but they are complex and for the unitiated there are quite a few pitfalls. See the pre-amp pages on my site if you are interested. http://www.kta-hifi.net/projects/pre_page/pre_page.html You want the first link. __________________ "Extraordinary claims require extraordinary evidence." - Carl Sagan

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
solid state metal preamp	fingerwizards7	Instruments and Amps	34	3rd February 2011 09:02 PM
Diy Solid State Preamp	Pocoyo	Solid State	21	17th July 2007 03:53 AM
hifi solid-state PREAMP ...	Ahmad_tbp	Solid State	34	20th June 2005 10:10 PM
Solid state preamp	gchrist	Solid State	4	7th April 2004 10:19 AM
Help with tube preamp for solid-state setup	wdwalker	Tubes / Valves	1	14th August 2002 05:00 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

30th October 2006, 08:21 AM	#11
bushroot diyAudio Member Join Date: Oct 2004 Location: The high-five state	So, I've done some reading about the Aikido. I'm in, now how do I build the thing? I found the PCBs and it looks like I'll need 9-pin 12AN7 tubes to get my 30db of gain. Where can I find more detailed information?

30th October 2006, 09:09 AM	#12
bushroot diyAudio Member Join Date: Oct 2004 Location: The high-five state	err...12AX7...I think...have to find the page again.

30th October 2006, 10:33 AM	#13
Original Burnedfingers diyAudio Member Join Date: Nov 2002	If your wanting a good line stage I would look for a tube that will give an mu of no more than about 36. The 6FQ7,6SN7,6N1P,and 6922 fall in this range. The 12AX7 would be way too much gain. More is not necessarily better here. I have built Aikido's with these tubes as input tubes and they sound quite nice.

31st October 2006, 07:16 AM	#17
bushroot diyAudio Member Join Date: Oct 2004 Location: The high-five state	Found the tubecad site and E-mailed John already. Seems like a nice enough guy.