The 250V DC does seem to be a printing error. On the other hand, it would be very impressive, if they could handle 250V DC and 3A. Even if the peak voltage of the 250V AC is of course higher, switching 250V DC is much tougher, due to arcing. See e.g. http://www.jenningst.../acdcswtc.shtml

If you look at the data sheet of a relay, e.g. this one http://www.conrad.de...214211&ref=list under "Documents and Downloads" you will find a huge difference between the DC and AC performance.

That was indeed my point. Btw. Here are the switches in question:

http://www.alibaba.com/product-gs/508476101/LA19_AJS_LED_illuminated_switch_push.html

http://www.alibaba.com/product-gs/485100004/IP65_Waterproof_Black_metal_Push_button.html

Great, then we agree Interesting links by the way.

Just wanted to let everyone know, 4171G ceramic pads is backordered till jan 10th. 2012 at futureelectronics.

Damn. you're talking about the momentary kind, right? Do they breakdown spectacularly?

No the switch just starts developing more and more bounce and eventually starts jamming up all the time (the internal part of the switch, the button you actually push isn't sticking).

ugh. Okay, got it. I'll get one or two to try out, but I'll also get bulgin ones as backup.

Also, good time to send in FPE orders. 20% off with coupon code 25K0NER0. http://www.facebook.com/frontpanelexpress

Also, good time to send in FPE orders. 20% off with coupon code 25K0NER0. http://www.facebook....ontpanelexpress

I was thinking in ordering the panel works from modushop, is the FPE better ?

Edited December 2, 201114 yr by Spychedelic Whale

I have never done work using modushop before, but given that they are closer to you, I think they would be a better choice than FPE. FPE does have a german counterpart I believe, their name evades me though...

http://www.schaeffer-ag.de/en.html

yep both are in Europe.

I was thinking in ordering the panel works from modushop, is the FPE better ?

I received my order from Modushop last week.

3 sets of 3U 400mm heatsink’s drilled exactly the same as Greg’s. Workmanship, communication and shipping were excellent. The price was every reasonable for the drilling also.

Khozmo decided to send me a 10Kohm attenuator instead of a 50Kohm unit for some reason. Is there any penalty with using the 10K attenuator with this amp?

Khozmo decided to send me a 10Kohm attenuator instead of a 50Kohm unit for some reason. Is there any penalty with using the 10K attenuator with this amp?

no. the only problem is if you're using a source where a 10K input impedance is too low. probably only a small number of tube phono pre-amps and CDPs with tube output stages would qualify.

The world seems to be going lower impedance which i think is a really good

thing for noise. Rays darkstar and sr71B have a 1k input impedance.

NOS dacs can be an issue too even though they have SS output stages. Other than that you just get lower noise.

Thanks guys. I don't think any of my gear is going to have issues with the lower impedance, so I'll throw in the Khozmo and see how she works.

justin just pointed out to me that at least according to the mouser website, the 2sc4686a part

has been end of lifed by toshiba. This is not what i was told by toshiba, but who the fuck knows.

People should put in lifetime buys now just in case. I just did.

Ditto.

justin just pointed out to me that at least according to the mouser website, the 2sc4686a part

has been end of lifed by toshiba. This is not what i was told by toshiba, but who the fuck knows.

People should put in lifetime buys now just in case. I just did.

Ditto.

You guys are too fast, 20 minutes after KG's post and Mouser is sold out

Oh god. Why did I not buy my stuff earlier...

I can't seem to find the end of life date, but back order is 6 weeks, i suggest people

buy them now.

Well got mine up and running tonight! I would have had it working last week but I had some khozmo related misfortune. I take back any good thing I said about them - check out this picture of my attenuator and tell me what's wrong...

Long story short when I was tracking down why I was only getting sound out of one channel I must have knocked something loose and I managed to fry both boards. I replaced all the semis in both channels other than the CCS which were still working correctly. Now it's back up and adjusted - got balance under a half volt on both channels but the left channel I couldn't get under 2V offset, which I figured wasn't a big deal. Here are some quick pics:

I'm listening to it now on O2 mk1s and all I have to say is wow! Definitely a big step up from the SRD7

Edited December 8, 201114 yr by cobra_kai

Very nice! Congrats!

Fugly! Good to see it works.

Now if only someone could get Dynafet up and running too

What you don't like silver? It matches my Beta 22/Alpha 10 stack.

I have to do a bit more wire management and the leds backlighting the volume knob aren't quite the right shade of blue so I need to try some others. Oh and if khozmo ever gets me 2 caddocks to put in the missing spot I will put those in (right now I put in some vishay dale RN series). Next up: the T2