Salas hotrodded blue DCB1 build - Page 308 - diyAudio
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Old 17th May 2013, 06:24 PM   #3071
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I picked up the Joshua Tree boards from twisted pear audio.
I'll let you know how it goes.
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Old 17th May 2013, 06:38 PM   #3072
Salas is offline Salas  Greece
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Old 19th May 2013, 10:11 PM   #3073
mantha3 is offline mantha3  United States
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Question on the Fets

I have the following fet spots open on the PCB:
two spots for K170
two spots for K1/0
One spot for C560
One spot for C550

I have Tea Bags kit and have:
qty two - K170 BL20
qty two - K170 BL1E
qty two - K170 BL1F
Qty one - BC550
Qty one - BC56

I am not totally sure what I put where and I'm looking for help... Thanks all!

PS Photo of the fets from Tea Bag:

Click the image to open in full size.

Last edited by mantha3; 19th May 2013 at 10:14 PM.
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Old 19th May 2013, 11:01 PM   #3074
mantha3 is offline mantha3  United States
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Correction on my Question on the Fets

I have the following fet spots open on the PCB:
Four spots for K170
two spots for K1/0
One spot for C560
One spot for C550

I have Tea Bags kit and have:
qty two - K170 BL20
qty two - K170 BL1E
qty two - K170 BL1F
Qty one - BC550
Qty one - BC56

I am not totally sure what I put where and I'm looking for help... Thanks all!
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Old 19th May 2013, 11:08 PM   #3075
Tea-Bag is offline Tea-Bag  United States
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There are matched pairs of 170's for the front in foil, the rest don't matter, place them in the power supply section. 2SK170BL is the type, the rest must be manufacturing info.
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Old 19th May 2013, 11:16 PM   #3076
mantha3 is offline mantha3  United States
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I have the matched pairs installed and saw how you matched them. Nice! You had a red sticker on the foil and they were a nice close match.

So I have a total of six K170. Do these go in the four spots marked K170 and the two spots marked K1/0 on the PCB?

Does the one marked BC56 go into the spot marked C560 on the PCB?
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Old 20th May 2013, 05:49 AM   #3077
nezbleu is offline nezbleu  Canada
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"BC56" is a BC560 (notice the "0" on the second line). There are no "2sk1/0", you are misreading the silkscreen. See the schematic.
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Old 20th May 2013, 06:42 AM   #3078
henryve is offline henryve  South Africa
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K1/0 = K170.
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Old 20th May 2013, 12:40 PM   #3079
mantha3 is offline mantha3  United States
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Thanks for the help Teabag, nezbleu and henryve. I've built some stuff from kits etc and I'm pretty new to this. Lets just say I've worked the solder iron and had a part in the wrong spot before. what a pain!
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Old 21st May 2013, 01:25 PM   #3080
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I fixed my previous problem, I had a blown 7812.. One of the rectifiers had a cold solder and I guess some AC passed through to 7812. Fixed both, now everything is in spec.

Question.. Is it ok that +Vout and -Vout are +10.14/-10.14? I read that one needs to be higher than the other or something??

Also, should I use a CL-60 thermistor to connect ground to safety earth like in the F5?? I plan to bolt safety earth (from IEC) straight to chassis. How should I ground my RCA jacks? This is my primary area of concern.. And do I ground the board?

I see the IN/OUT molex have ground pins.. So should the grounds from each pair of RCA jacks go to the ground pin on the molex?
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