[B]PRP resistor group buy for the EUVL F5X build[/B] - Page 6 - diyAudio
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Old 29th October 2011, 06:59 AM   #51
pchw is offline pchw  United States
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From this post, it will be
12 x TO-247-2 and 22 x TO-220-4.
However, due to the way the TO-220-4 is packaged (7 pads in one strip), I have to force everyone to round up to a multiple of 7 because I don't want to cut into the middle of a strip. John, I rounded you up to 42 x TO-220-4 and added to the spreadsheet.

Thanks!!
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Old 29th October 2011, 07:02 AM   #52
pchw is offline pchw  United States
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Ah, just saw your update, John.
I will wait for Patrick to confirm the TO-220-4 and adjust for you. It will be
either 21 or 28.

Thanks,
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Old 29th October 2011, 07:18 AM   #53
heinz1 is offline heinz1  Europe
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Quote:
Originally Posted by EUVL View Post
...

If I am not totally forgetful (I am occasionally these days) that's all you need.


Patrick
It's 22 TO220 pads you'd need in total (six additional TO220 devices on protection board), see post #71
in the regulator GB thread.
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Old 29th October 2011, 09:02 AM   #54
EUVL is offline EUVL  Europe
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> It's 22 TO220 pads you'd need in total (six additional TO220 devices on protection board)

Yes, but I also said in the same post that the protection board TO220s are not critical at all and can easily live with mica & grease.

So essential 16x TO220.
Luxury 22x TO220.




Patrick
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Old 29th October 2011, 10:36 AM   #55
JBdV is offline JBdV  Netherlands
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I missed the GB for 2SK2013/2SJ313.
Can I still get in?
Is this for F5X?

I would like quantity for 3 F5X

I am having problems of keeping up with DIY these days ... busy busy busy

Jan
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Old 29th October 2011, 04:57 PM   #56
ichiban is offline ichiban  United States
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Wow! I didn't see this group buy, 2SK2013/2SJ313, are these the output devices? I'm in the resistor GB. If possible I would like a set of outputs for a stereo amp. What are those 2SK3897/2SJ618's for ? I guess I'd need pads also. If I'm too late, thanks anyway.
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Old 29th October 2011, 05:40 PM   #57
pchw is offline pchw  United States
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Let see I can answer Jan and ichiban at once :-)

Juma used F5 as the basis and design the TF5 in this thread.
A few member built this circuit and had good feedback. In here, Juma used 3 x N-P pairs per channel. In post #42, the same circuit was tweaked a little to make it a line preamp!!

In Papa's new BA-3, he also used 2sk2013/2sj313 as the reference parts, see Papa's article here. Then later, Papa published the BBA-3 (Balanced BA-3) which is effectively 2 x BA-3 with minor tweak :-) The BA-3 boards are also available in the diyaudio store !!!

symslow of our F5X test team also used these in the UGS and had good result. Since I am quite intrigue of so many usage of these transistors, I bought some so that I can match them up and have some fun for future projects. Obviously, I need more than I use to have good matches :-) Hence, I have some excess to sell.

Ichiban,

The 2SK3897/2SJ618 are for the regulator, one set per one stereo F5X. I still have some Keratherm pads left, plenty of TO-220-4 but only have 20 TO-247-2 (you need 12 for a stereo F5X).

Thanks!!
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Old 29th October 2011, 05:53 PM   #58
pchw is offline pchw  United States
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Quote:
Originally Posted by EUVL View Post
So essential 16x TO220.
Luxury 22x TO220.



Patrick
What luxury upgrade can be bought for only 0.34 x 6 = 2.04? I will take that any time any day Since I force everyone to purchase a multiple of 7, this will be more like 7 x 0.34 = 2.38 luxury price tag
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Old 29th October 2011, 07:44 PM   #59
qusp is offline qusp  Australia
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can i add some of those keratherms? i need 8 x to-274-2 and say another 28 x to220-4 (4 x 7) sorry i dropped off this was gonna get 50 but I've go so many parallel projects going at the moment i lost track of this one.
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Old 29th October 2011, 10:49 PM   #60
pchw is offline pchw  United States
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qusp, I have plenty of TO-220-4 . I ordered 2000 from the factory, but I only have 20 TO-247-2 left which should be just enough for you (8) and Ichiban (12). If you 2 decide to go for it, let me know, and I will add you 2 to the spreadsheet.

Jan, I apologize that I didn't quite answer your question and might confuse you. The 2SK2013/2SJ313 are not for F5X at all. I just happen to have some available for other interesting projects as described above and can ship with the F5X parts.
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