On Line Tube Learning for newbies.... - Page 9

Dominique_free · 11th January 2008, 09:34 PM

Not hundred % sure that this one is not already here. A page that link to some very good readings: Miscellaneous Document Archive

Among the links on this page, my favorite of the day, a must read: Beam Power Tubes by O.H. Shade

Matt Helm · 17th February 2008, 07:00 AM

great info! Thanks guys!

Aidan135711 · 1st March 2008, 10:26 PM

I am a newbie to tubes and have always been interested in these glass thingies that I keep finding but I just put them in my bits box thinking"I must read up about these devices someday".
Only recently did I discover this forum and have built a surround chipamp but tonight I found this thread and more specifically,BHD's link to boozhoundslabs amplifier and some other theory links.
Boozhounds amp is a beutiful piece of craftsmanship and I have just got to make one,so I will be posting here a lot soon with silly questions.
This forum is great.

fragchamp · 9th May 2008, 07:16 AM

Hey dudes. I am going to make a tube preamp and also a guitar amp. I need to be unmoderated! Unmoderate me! Unmoderate me now! Will that do it?

tjt111012 · 12th June 2008, 01:39 PM

hey guys,
thank u so much,
your jobs are very helpful to me!

pstcho · 22nd July 2008, 09:36 PM

hi, is that possible to replace a 12au7 by a 12ax7 in tube preamp

what kind of mods must i do to do it?

excuse me if the question has been posted many times

thank you

impsick · 24th July 2008, 12:50 PM

WOW found this page just. Great stuff. The tube numbering system link is some good info to know! HERE

msmpe · 30th July 2008, 06:52 AM

Originally posted by pstcho
"is that possible to replace a 12au7 by a 12ax7 in tube preamp"

I'm not the expert, but if you go to Tube Town and look up their report on preamp tubes, they suggest swapping a 12Au7 with a 12ax7 for more gain (40 vs 100). Also, Steve at Decware makes the same suggestion for one of his amps. Check out the three tubes in your tube manual.

Also aNooby hooked on tubes

pstcho · 30th July 2008, 12:39 PM

hi, thank you for your answer

it's the same connection but somebody in another forum told there's too mutch modify to make to have no trouble with noise because of impedance difference

somebody as already done it for a test?

thank you

6550stan · 6th August 2008, 01:36 PM

Hi, Great site here LOADED with info! My name is Stan & I'm from New York. I have a question on my B & K Dyna-Quik Model 650 & would be beyond grateful if someone could help me. I have a hundred + 6550 International KT-88 tubes and cannot figure out if my B & K has the socket for proper testing. Based on my built in chart that # falls in between two others with completely different sockets,sensitivity #'s & heater#'s. I am new to this end but not new to using tubes. Thanks & great site! Awesome info- I feel like I found a new home! If I need a new tester please let me know the best and most affordable recommendation. 6550stan

22nd July 2008, 09:36 PM	#86
pstcho diyAudio Member Join Date: Jul 2008	replace 12au7 by 12ax7 hi, is that possible to replace a 12au7 by a 12ax7 in tube preamp what kind of mods must i do to do it? excuse me if the question has been posted many times thank you

24th July 2008, 12:50 PM	#87
impsick diyAudio Member Join Date: Dec 2006 Location: Huntington Beach, Ca	WOW found this page just. Great stuff. The tube numbering system link is some good info to know! HERE __________________ "Nothing happens for a reason. There are just reasons why things happen." Quote me on that. http://stores.ebay.com/AudioGrade?_rdc=1

30th July 2008, 06:52 AM	#88
msmpe diyAudio Member Join Date: May 2008	Re: replace 12au7 by 12ax7 Originally posted by pstcho "is that possible to replace a 12au7 by a 12ax7 in tube preamp" I'm not the expert, but if you go to Tube Town and look up their report on preamp tubes, they suggest swapping a 12Au7 with a 12ax7 for more gain (40 vs 100). Also, Steve at Decware makes the same suggestion for one of his amps. Check out the three tubes in your tube manual. Also aNooby hooked on tubes __________________ 8>) Mike

6th August 2008, 01:36 PM	#90
6550stan diyAudio Member Join Date: Aug 2008	New To Tube Testing Hi, Great site here LOADED with info! My name is Stan & I'm from New York. I have a question on my B & K Dyna-Quik Model 650 & would be beyond grateful if someone could help me. I have a hundred + 6550 International KT-88 tubes and cannot figure out if my B & K has the socket for proper testing. Based on my built in chart that # falls in between two others with completely different sockets,sensitivity #'s & heater#'s. I am new to this end but not new to using tubes. Thanks & great site! Awesome info- I feel like I found a new home! If I need a new tester please let me know the best and most affordable recommendation. 6550stan

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11th January 2008, 09:34 PM	#81
Dominique_free diyAudio Member Join Date: Dec 2005 Location: Lausanne	Not hundred % sure that this one is not already here. A page that link to some very good readings: Miscellaneous Document Archive Among the links on this page, my favorite of the day, a must read: Beam Power Tubes by O.H. Shade

17th February 2008, 07:00 AM	#82
Matt Helm diyAudio Member Join Date: Feb 2008	great info! Thanks guys!

1st March 2008, 10:26 PM	#83
Aidan135711 diyAudio Member Join Date: Feb 2008	I am a newbie to tubes and have always been interested in these glass thingies that I keep finding but I just put them in my bits box thinking"I must read up about these devices someday". Only recently did I discover this forum and have built a surround chipamp but tonight I found this thread and more specifically,BHD's link to boozhoundslabs amplifier and some other theory links. Boozhounds amp is a beutiful piece of craftsmanship and I have just got to make one,so I will be posting here a lot soon with silly questions. This forum is great.

9th May 2008, 07:16 AM	#84
fragchamp diyAudio Member Join Date: Jul 2007	Hey dudes. I am going to make a tube preamp and also a guitar amp. I need to be unmoderated! Unmoderate me! Unmoderate me now! Will that do it?

12th June 2008, 01:39 PM	#85
tjt111012 diyAudio Member Join Date: Apr 2006 Location: nan jing china	hey guys, thank u so much, your jobs are very helpful to me!

30th July 2008, 12:39 PM	#89
pstcho diyAudio Member Join Date: Jul 2008	hi, thank you for your answer it's the same connection but somebody in another forum told there's too mutch modify to make to have no trouble with noise because of impedance difference somebody as already done it for a test? thank you

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