I am researching how to get more voltage to the buffer circuit, especially with out hitting the tube with more voltage.

I know the 12aj6 are not good for headphone, but thought they might work well for small 8 ohm speakers. I am researching any changes that need to be made to the mosfet max so that these work, some people have said that they clip off at low volumes, not sure if this is after trying them or if...

I have 14 of them and saw that they were supposedly compatible, I will try them out and post results, I also have 12ae6 and 12fm6 so I will try to compare them all.

Thanks, I will try them. I want to setup my MOSFET max for my internet radio that I am building, just some flea speakers, for my desktop at work. I have seen that some people on here mention running the MOSFET max with 12aj6's but you would need high PS voltage, any idea where I could get a list...

ok, I have tried looking everywhere, I am trying to build a mosfet max and need either a quad matched 2sj74/2sk170 or replacements, as I am going to build this in mosfet DB.  I have looked everywhere on google and ebay, the only place I can find them are from China and have read the warnings...

thanks, I will add them to the BOM at mouser.  I am also going to try 610-MPSA14 and 512-MPSA42, this is what mouser says are substitues for the original.  I will try both of the replacements for each of these transistors and post on here what I findout

I am working on building my SOHA II and I have the BOM at mouser. Problem is two of the transistors are no longer avaiable, the fairchild MPSA42RA and the Fairchild MPSA14_D74Z.  Any ideas on replacements for these, the MPSA14_D74Z is Q1p and q2p in the power supply and the MPSA42RA is q3e on...

no, nichicons, the red is an Elna (think I spelled that right), I tired and Elna for ca2 but it was about 3mm too tall. I did use a Russian k42 .01 ohm for a bypass instead of a vitamin q, I had a few already. I wanted to try the white and they look really cool, I thought they might be good with...

Another MiniMax lives. Just got mine finished today and it sound AMAZING.

american semiconductor has some of the pn4392's in stock, I ordered 10 just in case  

I am having the same problem, I have all the parts for my minimax, just cannot find the pn4392, did anyone ever figure out what the replacement is for this transistor.  

looks like not much interest, so I am going to go another route.  Oh well.  

Someone asked me how I like payment, I can do Paypal, not setup for anything else, sorry.

I am in the process of building 3 tube amps, MiniMax, Bijou, and SOHA II.  WHile I am gathering parts, I started looking for hookup wire, I have access to an industrial supply that sells wire (I teach IT at a 2 year college so we buy lots of Cat 5 and 6 cable).  They have the Belden 83006...

thanks, I will do that. I really appreciate the help.  I need to order several parts that you carry for the miniMax, much easier than trying to find all these special parts where ever.  Thanks for having beezar, it helps those of us that are tinkerers but want good quality equipment.  One of my...

Ok, trying to source out the parts to build my miniMax.  I got everything ready to order except QM2, Fairchild discontinued the mpsa14 and the replacements only have .5a continuous collector current, the fairchild has 1.2a continuous collector current.  Any ideas for a replacement for the mpsa14...

I had someone give me a large bag of tubes.  I have looked up the data on them but still not sure which of these are useful in making a tube amp and which are misc.  I do know that I have two 12au7a that I do know that I can use for a headphone amp.   Here is the list of the others: (I...

Ok one more, if you ever need to find out about tube data, this site  http://www.nj7p.info/Common/Tube/SQL/Tube.php is amazing, he lists  a lot of info about the tube, even some of the uses for the tube. 

After posting the above, I located a listing in another post that led me to a place I can print out info for most of the tubes.  Thanks whomever for the info and once I get the info I am going to talk to my electrical engineering friend about these.  

I just received a bag (large) of tubes, there are about 30 or 40 of them here.  I can identify about 4 or 5 using information from the forums here, but is there a site I can use to identify what the rest of these are.  I would like to know if I can use these to build an amp, power supply or...

the razordog coupon for the hd600's is still good, I just ordered mine and paid $299 for them.  the coupn if RAZORDOG100. saw this in and earlier thread here.

I just got my HD239's, I have been using just cheap walmart headphones up to this time, and I find them very responsive, good balanced sound.  I used to, years ago, DJ so I know what sound should sound like.  I have been disappointed with headphones to this point and was resigned to just dealing...

sorry, the last post should have been about Ubuntu and the e17.  

Just in case someone came here looking for an answer to this question, yes the e17 does work with ubuntu/linux mint.  It does not show up as a usb device on the desktop, you have to go into sound setting and change the sound card, it will show up there.  

just wanted to let people on here know that I just picked up a pair of these headphones for $105 new-open box with a Fiio e11 for $58.