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post #24106 of 24765
Quote:
Originally Posted by Tus-Chan View Post

What does the Stax peanut gallery think about the SRM-1/MK2? Does $450 sound like a reasonable offer for one? I plan to drive Lambdas with it but may think about moving up the chain at some later point.

Had one. Liked it. Good price..good amp. Rev B or C and you should be set

post #24107 of 24765
Quote:
Originally Posted by sachu View Post

impressive. Good on you mate.  I've done hand drilling heatsinks, using a tapping kit etc and built a chassis from bare aluminum sheets and it is a nightmare indeed. Was also my first amp (speaker) and it looks like a bomb and a rats nest. Amazingly its still running some 8 years later (i really had my doubts). Albeit not HV. Just +/-40V rails.

 

 

Curious, what is the output stage CCS current set at?

I kept it at "stock" values using the IXYS parts, I believe that pegs it at 5.5mA for the output stage? Someone can correct me. I remember numbers like 8 and 13 being thrown around but that sounds pretty silly

 

And yes I went through two taps (only?), I wasn't aware that one could lubricate them as you tapped the hole.

post #24108 of 24765
Quote:
Originally Posted by NoPants View Post

I kept it at "stock" values using the IXYS parts, I believe that pegs it at 5.5mA for the output stage? Someone can correct me. I remember numbers like 8 and 13 being thrown around but that sounds pretty silly

 

And yes I went through two taps (only?), I wasn't aware that one could lubricate them as you tapped the hole.

 

Isnt that team overkill's middle name?

 

Im planning on upping mine to at least 10mAs...might go higher...Spritzer always says to go till you see smoke o2smile.gif

post #24109 of 24765
Quote:
Originally Posted by K_19 View Post

Just wanted to report for y'all with the Japanese 2170 combo that my friend tried the following combination for AC Adapter and it works perfectly (well, for now anyway, but specs wise it shouldn't have any problems):

 

http://www.thesource.ca/estore/product.aspx?language=en-CA&catalog=Online&category=AC+Adapters%2fPlugs&product=2739185

http://www.thesource.ca/estore/product.aspx?language=en-CA&catalog=Online&category=Cable+Adapters&product=8000737

 

Thanks for another solid option. beerchug.gif

post #24110 of 24765

These Tormach's are outstanding.  I was lucky enough that a friend purchased one and I had full access to it when I was in CA.  

 

Don't underestimate the size of it when you go to move it, it's a beast! We used serious gear to get it into and set it up in his shop.  Several teenagers at a minimum!!

 

Quote:
Originally Posted by kevin gilmore View Post

I have been spoiled by all the full size NC machine tools at work, especially

the fully reconditioned WW2 monarch lathe, and if I could get 3 phase power

at home, I would find a way to acquire one. However I finally found something

that runs on single phase power, just need some teenage muscle to get

it into the basement.

http://www.tormach.com/product_pcnc_1100.html

post #24111 of 24765
Quote:
Originally Posted by miceblue View Post

How come no one talks about the Sigmas? I tried a pair and wasn't too impressed by it, but supposedly they have a natural-sounding soundstage due to the angled drivers or something along those lines.

 

What amp were you using?

 

I'm not impressed when I listen to them using my SRM-252. On the other hand I am impressed when I use my KGSS.

 

Quote:
Originally Posted by spritzer View Post

Here is a picture of the first HVk amp which I completed yesterday. 

 

Warning: Spoiler! (Click to show)

 

Cool. How big's the case (just wondering how kompakt it is compared to the regular hv)?

 

Quote:
Originally Posted by SBranson View Post

Warning: Spoiler! (Click to show)

 

They are serious.  How about this for $40.  A little baggy of rocks you tape to your ICs.  I wonder if the tape is audiophile grade.  

 

 

This doesn't make me happy.  Could you please retype that first sentence and change the word "wasn't" to "very"... please and thank you.tongue_smile.gif

PS.. so what did sound good?  727? 717?

 

I cant be bothered copying and pasting it here as it's too many pages back so yeh...

 

just use your imagination - it'll enhance your listening experience!

post #24112 of 24765

I've removed a considerable amount of off-topic discussion of nonsense products. This is the Stax thread, not the random inane chatter about nonsense products thread. Please make sure you all remember that and tread one of Head-Fi's most important resources with respect.

post #24113 of 24765

I did want to mention misconceptions about the differences between the various single tube per channel stax amps

(t1,t1s,006...) and the two tube per channel (007) versions.

 

They all run on the same voltages and have the same size and value plate resistors. So they all put

out the same power. But the two tube per channel versions do a better and more linear job of amplification.

And therefore sound more relaxed and less strained.

post #24114 of 24765
Ohh, very nice to know!
post #24115 of 24765
Quote:
Originally Posted by Currawong View Post

I've removed a considerable amount of off-topic discussion of nonsense products. This is the Stax thread, not the random inane chatter about nonsense products thread. Please make sure you all remember that and tread one of Head-Fi's most important resources with respect.

 

Sorry for my part in that.  It was intended in fun as I've had others question my sanity over my tweaks.

post #24116 of 24765
Quote:
Originally Posted by Tus-Chan View Post

What does the Stax peanut gallery think about the SRM-1/MK2? Does $450 sound like a reasonable offer for one? I plan to drive Lambdas with it but may think about moving up the chain at some later point.
Isn't the SRM-1/MK2 less expensive than the SRM-T1?

I got my SRM-T1 for less than that, albeit modded.


Returning to my channel imbalance issue, I notice that continuous playback of the right channel for 72 hours seems to have made it weaker volume-wise, at least temporarily. I shorted the pins and stashed the headphones for a bit to discharge them as I remember the right channel being distinctly louder when I first plugged them in. I plan on testing them again today or tomorrow.

Assuming the right channel starts out OK but gets quieter as it charges up, and assuming Drew replugged them twice to rule out a bad retermination, what would this behavior suggest?
post #24117 of 24765

If Stax made all different kinds of specialized speakers, turntable parts, and other components, how come none of them are ever mentioned on this thread?

Also, this:

post #24118 of 24765
Quote:
Originally Posted by jjinh View Post

 

Cool. How big's the case (just wondering how kompakt it is compared to the regular hv)?

 

This box is 19" wide just like my other HV's but only 350mm deep compared to 400mm before.  The change is bigger than that though as the old boards were a very tight fit into that 400mm chassis with the amp boards pretty much taking up the entire width.  When I built the first 2U HV amp most didn't even think it was possible to cram all this circuitry in there.  Now there is room to spare which naturally helps the cooling.  I'm stress testing the amp now so even with minimal airflow it stays quite cool.  The chassis directly above the amp boards reaches ca. 30°C above ambient which is quite good.  For reference the old Headamp KGSS used a 19"*400mm chassis as well. 

 

The main reason for making the boards smaller was cost though as smaller PCB's will always be cheaper so it made sense to do that while we did the redesign. 

 

Quote:
Originally Posted by kevin gilmore View Post

I did want to mention misconceptions about the differences between the various single tube per channel stax amps

(t1,t1s,006...) and the two tube per channel (007) versions.

 

They all run on the same voltages and have the same size and value plate resistors. So they all put

out the same power. But the two tube per channel versions do a better and more linear job of amplification.

And therefore sound more relaxed and less strained.

 

Good point and the 007t's only really run into trouble when you push the volume. 

post #24119 of 24765

Sooooo, what does a KGSSHVk built cost if you wanna go the cheapest route possible?

post #24120 of 24765
Quote:
Originally Posted by miceblue View Post

Yup I just checked the local RadioShack store and they have some of those in stock after all.

 

I'm wondering what exactly these ratings mean though. There's the above one for $30 which is rated at 1.5 A, and there's one that's $8 cheaper but only outputs 0.5 A. Is there any advantage to having one over the other if I'm planning to replace the stock 100 V,  ~0.330 A one?

 

Supposedly my Kashimura 120 V -> 100 V transformer is on its way here. I would think the transformer is more versatile than the wall wart, no?

 

Sorry missed your post over all the KGSSHV love (well-deserved!). Side note: If you care to do the research, it is possible to build it as your first amp (I'm another that did). Spritzer and Kevin are very helpful and there's already a ton of info [costs; bills of materials; things to look out for] already written - I'll say it takes a while to search but it's all there.

 

The 252 amp only draws ~330mA... there's no advantage going over that. Any advantage has to come from how stable the power supply is. Yes, the transformers will work regardless, you just have to bear with the heat from the transformers. It may not be much from 120-100v, but it's quite a bit of heat from 240-120v. 

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