SX-1010 project

Here is the list of parts that I would like to add to my BOM for the power supply. Can you guys please let me know if these replacement parts are ok, and I will add all of them to my BOM list in the previous post.

AWR-054-0 Power Supply:

R2: 3.3k Ohm ¼ watt: 660-MF1/4DC3301F 3.3k Ohm ¼ watt
R10: 8.2k Ohm ¼ watt: 660-MF1/4DC8201F 8.2k Ohm ¼ watt

D1: S1B01-04: 821-1N4004
D2: S1B01-04: 821-1N4004
D3: S1B01-04: 821-1N4004
D4: S1B01-04: 821-1N4004
D5: 1S1885: 512-UF4004
D6: 1S1885: 512-UF4004
D7: 1S1885: 512-UF4004
D8: WZ-320: 512-1N5257B
D9: WZ-320: 512-1N5257B
D10: WZ-140: 512-1N5244B
 
Good call on ordering all the transistors for the Amps. I didn't and needed them. I also ended up having to pull that board several times because of it. Eventually, the lead to the STV broke off, but I have the version where it's mounted to the heat sink. After all that, I shorted out the amp, due to stupidity, by moving the mini grabber from pin to pin while the amp was on. That sucked because I had it done and was just dial in the offset.

Just be sure and take your time, check your work three times, work board to board and test in between just like you did with your 737. Take lot's of pictures, check for broken wires on the posts because it's likely to happen. Also be prepared for unexpected findings in there if someones been there before you.

The control board is the most difficult to get to as I remember. It's a tight fit. Make sure you loosen up all the wire looms to make all the slack you can get. And be real careful with that power supply board. It looks crispy.
 
If your going to use UF4004 in 1/2 of the power supply, go ahead and use them in D1 thru D4 also. Otherwise just use the 1n4004 in D1 thru D7. You will NOT hear the difference, and the power supply wont care one way or the other.
 
I had some out of spec voltages after I rebuilt my power supply board and had to go back and replace the zener diodes. Of course, your voltages are OK before a rebuild, but I'm not sure I wouldn't replace them anyway as cheap as they are and no more trouble than it is with the board already out.
 
ZeroJunk said:
I had some out of spec voltages after I rebuilt my power supply board and had to go back and replace the zener diodes. Of course, your voltages are OK before a rebuild, but I'm not sure I wouldn't replace them anyway as cheap as they are and no more trouble than it is with the board already out.
Click to expand...

This is my plan. I want to try to access each board only once. Hopefully that will keep the self induced damage to a minimum.
 
larryderouin said:
If your going to use UF4004 in 1/2 of the power supply, go ahead and use them in D1 thru D4 also. Otherwise just use the 1n4004 in D1 thru D7. You will NOT hear the difference, and the power supply wont care one way or the other.
Click to expand...

Sounds good. I will edit my list to include UF4004 for D1 - D7.


I have went back and added these additional parts to the BOM list that I posted previously. I think I am almost ready to place my order. Can you guys please review what I have and let me know if anything is missing or incorrect? I am most nervous about the transistors I have listed for the Power Amp and for the Power supply as they are not included in most of the lists that I found, and I have also come across some conflicting info in the lists that I located.
 
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Everything looks good to me.
You don't have to replace the entire set of amp transistors Just the 2SC1451's and the 2SA726's which are the suspects in this case. Although. Considering, you will have to check all the transistors anyway, replacement is is a wiser choice.
Consider using the Thermalsil Pads for the outputs instead of the traditional paste. I've moved away from the paste almost completely. This of course is if you don't mind a little more modern approach to the rebuild.
TO-3 Sil-Pads 532-53-03-2 Qty 8
TO-220 Sil-Pads 532-7721-7PPS Qty 4

Mica:
534-4662 Qty 8. Note: I would order a few extra in case you damage one or two.
534-4673 Qty 4
Joint compound Thermalcote 2 oz 532-250. Note: this will delay the shipment by a few days (HazMat). Ship ground economy. Priority is a waste of money.
 
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Are my output transistors ok to reuse based on the 6 way test that I did? That seemed like good results to me, but I've never done that testing before.
 
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zebulon1 said:
Everything looks good to me.
You don't have to replace the entire set of amp transistors Just the 2SC1451's and the 2SA726's which are the suspects in this case. Although. Considering, you will have to check all the transistors anyway, replacement is is a wiser choice.
Consider using the Thermalsil Pads for the outputs instead of the traditional paste. I've moved away from the paste almost completely. This of course is if you don't mind a little more modern approach to the rebuild.
TO-3 Sil-Pads 532-53-03-2 Qty 8
TO-220 Sil-Pads 532-7721-7PPS Qty 4

Mica:
534-4662 Qty 8. Note: I would order a few extra in case you damage one or two.
534-4673 Qty 4
Joint compound Thermalcote 2 oz 532-250. Note: this will delay the shipment by a few days (HazMat). Ship ground economy. Priority is a waste of money.
Click to expand...
Thermal pads are great and work out to the same cost considering the price of compound
 
Oscar23 said:
Thermal pads are great and work out to the same cost considering the price of compound
Click to expand...

I have some compound left over from my 737 that I can use, but I may give them a try anyway. I had no idea they existed. Thanks for the tip guys!
 
If your output's passed the 6way test, by all means go ahead and put them back in. I only replace them if blown.
 
This is what I used in my 1010 back in 2011. There are 2012 updates at the bottom. Should be close to what is used today. BTW, These are MTF recommended at the time and should still be valid today. Prices are as of 2011, not today. so adjust accordingly.


These are mouser.com parts numbers:

Q1 Q2 Q3 2sa726 to-92 bce 50v .1a .12w 100mhz 500hfe >>> KSA992
512-KSA992FBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea

Q5 Q6 2sc1451's: to-39 npn ebc 150v 0.5a .7w 150hfe 130mhz
512-KSC2310YBU to-92 ecb 150v .05a .8w 100mhz 40-240hfe $0.11 ea

Q4 2sb528 (bias circuit): to-202? bce 130v .8a 1/10w 55-300hfe ?mhz
512-KSA910YSHTA to-92 ecb 150v .05a .8w 100mhz 40-240hfe $0.07 ea

---------------- this stuff is probably not contributing to the noise ----

Q8 2sb528 (pre-driver): to-202? bce 130v .8a 1/10w 55-300hfe ?mhz
512-KSA1220AYS to-126 ecb 120/a160 1.2a 20w 155mhz 35-320hfe $0.39

Q7 2sd358 (pre-driver): to-202? 130v .8a 1/10w 55-300hfe ?mhz
512-KSC2690AYS to-126 ecb 120/a160 1.2a 20w 155mhz 35-320hfe $0.40

Q10 2sa740 (driver): to-220 bce 150v 1.5a 25w 40-140hfe 8mhz
512-KSA940TU_Q pnp to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54

Q9 2sc1448 (driver): to-220 bce 150v 1.5a 25w 40-140hfe 8mhz
512-KSC2073TU npn to-220 bce 150v 1.5a 25w 4mhz 40-140hfe $0.54


Q12 2sa733 to-92 ecb 60v .1a .25w 200hfe 180mhz
512-KSA992FBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea

Q11 2sc945 to-92 ecb 60v .1a .25w 90-600hfe 150mhz
512-KSC1845EBU (ln)to-92 ecb 120v .05a .5w 100mhz 150-800hfe $0.05 ea

Main Filter Caps.
(Digi-Key) 565-3331-ND 18000uF 75v screw terminal 50.80mm dia x 79.38mm high


As of JAN2012 NEW UPDATE

2sc1451 >> ksc2310 old choice, heat problems
2sc1451 >> ksc3503 much better new choice, plus 2310 is fading away and soon will be nla....

512-KSC2310YBU TO-92 ecb 150v .05a .8w 100mhz 40-240hfe $0.11 ea :planned for obsolescense....

so use:
512-KSC3503dstu npn to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.28 ea
just for grins and giggles - here's it's complement as well:
512-KSA1381estu pnp to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.27 ea


__________________

2sa726 pnp to-92 BCE!!!
512-KSA992FBU (ln)to-92 ecb!! 120v .05a .5w 100mhz 150-800hfe $0.05 ea

2sc1451 npn strange case ebc...
512-KSC3503estu to-126 ecb 300v .1a 1.2/7w 150mhz 40-320hfe $0.28 ea
 
Motnick; The power amp list that Zebulon1 shows on page 1 or 2 is the same list I used back in 2011 for the amps on my 1010. I had Mark the Fixer holding his breath, along with my hand on that one. my list for the amps originally had older subs for the 2sc1451 but in 2012 MTF changed it to the ksc3503 from the ksc2073. So I changed them. Go with ZEB's list and you got 1/2 the battle won. His list is the most updated list for a 1010 out there as he does 4-5 of them a year or even more from what I've seen on the forum.
 
Ok let me review and update my BOM. I plan to keep this receiver with me forever. I'm gonna put my best into it, and take my time to do the best work that I possibly can. My 737 turned out great, and I have really been enjoying all of the work that went into it.

I owe you all a beer for all of the help that you have given. I really appreciate it! This forum has been wonderful.
 
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I'll settle for a Coca-Cola. Last time I had a beer I was on a Navy base and the State law was 21 out in town, I was 18. Now 62. Never could get used to the taste. Besides with all the different meds I have onboard, the docs have gas when I drink a rum and coke once a year. That bottle of Pusser's rum I got 20 years ago I've gotten my $$'s worth out of. I like Black Seal rum better. Tastes better in Coke and is 1/2 the price of Pusser's. :beerchug:
 
I have made some updates to the transistor list for the Power Amp board to match up with Zeb's list. It looks like I had a few wrong part numbers. Here is what I have now.

AWM-039-A Power Amp:

Q1: 2SA726: 512-KSA992FBU
Q2: 2SA726: 512-KSA992FBU
Q3: 2SA726: 512-KSA992FBU
Q4: 2SB528: 512-KSA1220AYS
Q5: 2SC1451: 512-KSC3503DSTU
Q6: 2SC1451: 512-KSC3503DSTU
Q7: 2SD358: 512-KSC2690AYS
Q8: 2SB528: 512-KSA1220AYS
Q9: 2SC1448: 512-KSC2073TU
Q10: 2SA740: 512-KSA940TU
Q11: 2SC945: 512-KSC1845FTA
Q12: 2SA733: 512-KSA992FBU

Does this look correct now?
 
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I'm so close to placing my mouser order and begining my recap. I just need to find a replacement for Q1 and Q7 on the power supply. Seems MJE15032G is out of stock everywhere I look.

Is their no alternate part that I can use for this transistor?
 
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