[timmyGCSE]

oh I know

and I realise you're doing the original but 12AU7,
I just want to build the optional one onto PCB now

I've done a really bad rough hand PCB sketch, its terrible and over complex but once I get it in expressPCB I can tweak it better

 

[the_equalizer]

Quote:

Originally Posted by timmyGCSE /img/forum/go_quote.gif I was thinking of this! would there be any advantage to doing it?

Balanced operation has several advantages over "single ended" among which are: twice the output power, twice the slew rate, decreased otput impedance, decreased noise and zero crosstalk. You can read a bit more here.

A balanced SSHM seems like an interesting experiment, I'm working on a balanced apheared 47 and recabled Grado SR-60is myself

. Still it seems to me that you'd need to get closely matched tubes and MOSFETs for it to be effective. Just build one, m11a1.. and let us know how it works !

Quote:

Originally Posted by timmyGCSE /img/forum/go_quote.gif oh I know and I realise you're doing the original but 12AU7, I just want to build the optional one onto PCB now I've done a really bad rough hand PCB sketch, its terrible and over complex but once I get it in expressPCB I can tweak it better

I definitely would love to try one of those PCB's too. hss3, if you plan on getting a batch of those produced, count me in.

cheers!

 

[Juaquin]

Quote:

Originally Posted by ezzieyguywuf /img/forum/go_quote.gif Now that you've mentioned the minimax and I've checked it out, I don't know which direction I want to go

Honestly, you'd probably be fine with the SSMH - it's a great place to start. You can always build the minimax sometime in the future if you feel the SSMH isn't enough.

 

[tomb]

Quote:

Originally Posted by the_equalizer /img/forum/go_quote.gif Guys, guys! as I said in my previous post: I'll add the higher value for the electrolytics and the optional parts (the highlighted ones) from the new schematic

Oops.

 

[timmyGCSE]

this amp really does sound crazy good...just using it with my Klipsch S2's, my mere £20 mainstay throw around IEM's, and I'm shocked at the huge openness and massive width and airyness of it all. In fairness I rank the S2's as the best dynamic I've personally heard but still...

think next step is different tubes

 

[m11a1]

Quote:

Originally Posted by the_equalizer /img/forum/go_quote.gif A balanced SSHM seems like an interesting experiment, I'm working on a balanced apheared 47 and recabled Grado SR-60is myself . Still it seems to me that you'd need to get closely matched tubes and MOSFETs for it to be effective. Just build one, m11a1.. and let us know how it works !

Well, I'm really thinking about a balanced SSMH 12AU7 version.

But, before I start anything, I really want to sketch out my ideas to see what you think.

I'll start drawing it out soon.

 

[hss3]

Quote:

Originally Posted by the_equalizer /img/forum/go_quote.gif I definitely would love to try one of those PCB's too. hss3, if you plan on getting a batch of those produced, count me in. cheers!

right now, no batch at the moment. I completed one that looks okay, but i still need a bit more practice.

I think i can make 2 more? so if i dont screw up on teh next two, i will have 2 great ones and one good one that is missing a mosfet connection.

If i have good extras, ill offer them out to people

 

[timmyGCSE]

equalizer..would it be worth you starting a new thread to branch the EIA 9A Starving Student off because it will get confusing otherwise, and since the 19J6 tubes look to be so scarce this ought to be the way forward to keep the project alive..

 

[m11a1]

Does anyone know where the PCB for SSMH besides Beezar? They are sold out there...

 

[tomb]

Quote:

Originally Posted by m11a1 /img/forum/go_quote.gif Does anyone know where the PCB for SSMH besides Beezar? They are sold out there...

Since the PCB was a Dsavitsk-Beezar proprietary product (with Pete Millett/n_maher's blessing), let me know if you find one somewhere else.

Quote:

Originally Posted by timmyGCSE equalizer..would it be worth you starting a new thread to branch the EIA 9A Starving Student off because it will get confusing otherwise, and since the 19J6 tubes look to be so scarce this ought to be the way forward to keep the project alive..

Just MHO, but I don't think we'd want to lose the connection to Pete Millett as the original designer. All of this is done with his permission, after all. The fact that his initial post anchors this thread is not unimportant.

Besides, posting the writeup, schematic, etc. on the SSMH website would address your worries about confusion.

 

[timmyGCSE]

Quote:

Originally Posted by tomb /img/forum/go_quote.gif Just MHO, but I don't think we'd want to lose the connection to Pete Millett as the original designer. All of this is done with his permission, after all. The fact that his initial post anchors this thread is not unimportant Besides, posting the writeup, schematic, etc. on the SSMH website would address your worries about confusion.

very true, the original design from Pete is as you say the reason for all this, I didn't mean to sound like this is a new design so forget the old one type thing, just meant there will more than likely be quite a bit of interest in the 12AU7 version but yes that'll be nice to have it written up on the website

 

[the_equalizer]

Quote:

Originally Posted by tomb /img/forum/go_quote.gif <snip> Just MHO, but I don't think we'd want to lose the connection to Pete Millett as the original designer. All of this is done with his permission, after all. The fact that his initial post anchors this thread is not unimportant. Besides, posting the writeup, schematic, etc. on the SSMH website would address your worries about confusion.

I definitely agree that it should be kept under this thread, also why I did not start a new one when I posted about the mod.

About the schematics, I'm hoping to integrate the remaining changes to the 12AU7 diagram today. As to other versions, if no one else volunteers (Logistic ?

) I'll tackle the schematic for Logistic's 12SR7 mod too.

cheers!

 

[ezzieyguywuf]

/me is getting excited about doing this build. I hope I can get organized befor spring break! (week of the 11th)

 

[Lil' Knight]

Quote:

Originally Posted by the_equalizer /img/forum/go_quote.gif A balanced SSHM seems like an interesting experiment...

Color me interested

Would be great if you could make a PCB for the balanced SSMH.

 

[Narwhalius]

Got my new pot in today. Took the old one out and put it in as soon as I could. Everything works good now. Even volume in both ears. Thanks for the help everyone.