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Old 25th October 2009, 08:21 PM   #321
grufti is offline grufti  United States
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I suggest that you get a second opinion before you order, because it is always a lot safer when somebody else error checks a new part suggestion.

That said, this one should work:

551-UA2-12NU [Mouser Part #]

http://www.worldproducts.com/pdfs/ua2ub2.pdf [manufacturer data sheet]

They're not cheap, but they also have "silver alloy with gold overlay contacts".

Mouser has many other relays that fit the bill. Just look for relays with the same specs as this one and/or the TQ2-12V.

Forget all the above. Mouser has the TQ2-12V in stock. That is what I use. Same specs and much cheaper than the NEC. Buy those and you'll be happy.

769-TQ2-12V [Mouser Part #]



Quote:
Originally Posted by adamus View Post
any other mouser relays that would work? they are on back order.

edit - they have the 5v in.
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Old 25th October 2009, 08:24 PM   #322
Salas is offline Salas  Greece
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Quote:
Originally Posted by adamus View Post
any other mouser relays that would work? they are on back order.

edit - they have the 5v in.
That is why we found a way around 5V relays on those boards too, so to have alternatives. Isn't there another make with compatible datasheet and pins order / connection on Mouser?. What comes up when you search for 12V relays?

Can this be good for instance? Please check thoroughly.
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Old 25th October 2009, 08:49 PM   #323
grufti is offline grufti  United States
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The relay that you are pointing to is of the "latching" variety. I'm not so sure that that is good.

Mouser does have TQ2-12V in stock. So he should be good to go!



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Originally Posted by Salas View Post
That is why we found a way around 5V relays on those boards too, so to have alternatives. Isn't there another make with compatible datasheet and pins order / connection on Mouser?. What comes up when you search for 12V relays?

Can this be good for instance? Please check thoroughly.
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Old 25th October 2009, 09:00 PM   #324
adamus is offline adamus  United Kingdom
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i went with the 5v relays in the end. order has been placed

cheers gents
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Old 25th October 2009, 09:02 PM   #325
Salas is offline Salas  Greece
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Quote:
Originally Posted by grufti View Post
I'm not so sure that that is good.

Mouser does have TQ2-12V in stock. So he should be good to go!
That is why I said double check on me.
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Old 25th October 2009, 09:04 PM   #326
Salas is offline Salas  Greece
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Quote:
Originally Posted by adamus View Post
i went with the 5v relays in the end. order has been placed

cheers gents
It will work great still. Have a nice build.
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Old 25th October 2009, 11:45 PM   #327
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Quote:
Originally Posted by Salas View Post
Can't give you any warranties that your build ain't going to collapse at a point and drive DC to a de facto direct coupled and not output protected amp like the F5. Or that you will not never ever have a faulty source connected. On the other hand nobody says that the amp will never fail itself for instance. If you use just one capacitor in the chain, and that will be between buffer and F5, you will be safeguarded though. Using a shunt over a normal B1, I don't know if it matches this one, never tried. Uses 2 caps BTW.

Cheers.


I will go with the normal b1 then. It seems easy enough to build it, and after I have some more insight I can always build the one with the shunt powersupplies.
Perhaps the normal b1 is challenging enough for me. ;-)
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Old 25th October 2009, 11:56 PM   #328
Salas is offline Salas  Greece
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Yes, so you can have some standard to compare as well, and become familiar also. Wishing you a good build.
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Old 27th October 2009, 12:55 AM   #329
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Default 2SK170 swap out for Shunt PS ??

Salas,

Any thoughts or considerations for swapping out the 2SK170's in the Shunt regulators with other JFET devices ? If so, do you think that either of these choices might work;

2N5245 <http://www.fairchildsemi.com/ds/2N/2N5245.pdf>

J210 <http://www.fairchildsemi.com/ds/MM/MMBFJ210.pdf>

The Idss range and Power dissipation are close to the 2SK170BL grade and the Yfs fall within the substitution range Nelson Pass originally identified for the B1 buffer.

Thanks,

David
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Old 27th October 2009, 01:08 AM   #330
Salas is offline Salas  Greece
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Vgs(OFF) is high, especially with the 210. Pins are incompatible with the boards too. The one under the leds could be J201 which has adequate pinch off, then again the 1.8Vf leds would not reach desired Vout with just 1mA max it can offer. In another board with one more led maybe, still pins are different. For the B1 audio part pinch off isn't a consideration. Its another thing there.
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