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Old 13th July 2009, 04:05 PM   #241
cheric is offline cheric  United States
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Could anyone (may be Audio1st) confirm this for me, please...

In order for me to use the input caps off board (as in the Sure T2024 board picture), I need to remove C16 and C24 and bridge them, C17 and C25, and finally R14 and R34 then connect the input caps between the pot terminals and the screw-in input terminals (CH1/GND/CH2). Of course I am talking about the TK2050 board using the T2024 pix as references.
What about the two caps under the board?
I have read the threads and still am a little confusing.
Thanks in advance.

Cheric
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Old 13th July 2009, 07:13 PM   #242
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Hi Cheric,

Yes you are correct, here is the diagram for the TP2050 board..
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Old 13th July 2009, 07:26 PM   #243
cheric is offline cheric  United States
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Audio1st,

Thank you so very much for your help.
Your diagram has solved all my questions. You have been a great one!
Again, thank you.

Cheric
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Old 13th July 2009, 11:14 PM   #244
dr_vega is offline dr_vega  United States
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Default Cheap SMPS

I found a closeout on HP Laser Printer power supplies: 32V, 2.34A (75 watts), $12.99, free shipping.

The company is The Printerworks on ebay:

http://cgi.ebay.com/HP-AC-Power-Supp...3286.m20.l1116

I've ordered two of them for my two 2*100watts boards (which have not yet arrived from China). I'll let you know how they work when everything gets here.

Is it too much to hope that the connector plug on the power supply will fit the jack on the board?

dr_vega
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Old 14th July 2009, 01:16 AM   #245
konman is offline konman  Australia
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Im using a similar deal but its a Dell laptop power supply and it works well.

The output is 19 volts at 3.3 amps. I think that is sufficient enough for me without spending more money on a power supply at the moment.

I also disconnected the ground lead. Yes its not recommended but the noise that was coming through was horrendous!! I could hardly hear the music through the buzzing!

Anyway the whole thing is encased in plastic and it was earthing a crude looking flimsy metal case inside the plastic one. it was almost like tin foil. So i just disconnected that and the noise instantly dissapeared. Ill mount this power supply again inside another plastic case anyway.
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Old 14th July 2009, 01:41 AM   #246
gychang is offline gychang  United States
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Quote:
Originally posted by audio1st
Hi Cheric,

Yes you are correct, here is the diagram for the TP2050 board..

can I use your usual top notch picture diagram for the TA2024 board upgrade of input caps? (sure electronics)?

gychang
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Old 14th July 2009, 02:22 AM   #247
cheric is offline cheric  United States
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Gychang,

If you are working on the Sure 2024 board, you'd better off using the attached diagram. BTW, go to the Sure 2024 thread, there are tons of info on this subject.
Picture...courtesy of Audio1st.
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Old 14th July 2009, 12:23 PM   #248
col is offline col  Australia
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Quote:
Im using a similar deal but its a Dell laptop power supply and it works well. The output is 19 volts at 3.3 amps. I think that is sufficient enough for me without spending more money on a power supply at the moment. I also disconnected the ground lead. Yes its not recommended but the noise that was coming through was horrendous!! I could hardly hear the music through the buzzing! Anyway the whole thing is encased in plastic and it was earthing a crude looking flimsy metal case inside the plastic one. it was almost like tin foil. So i just disconnected that and the noise instantly dissapeared. Ill mount this power supply again inside another plastic case anyway.
Hi Konman,

I have a couple of amps (TA2020) that I run off of laptop supplies and I have had a similar experience. The PSUs that have only two pins are much (MUCH) quieter. Also, I use them in a tri-amped system and have found that with the 3 pin ones noise goes back up the gnd and pollutes the other amps

The Toshiba SMPS and some Compaq ones use 2 pin, which is what Iv'e been using. I haven't actually tried cutting the earth off a 3 pin one yet though.

My Sure Electronics tc2000+tp2050 board should arrive soon Iv'e got a few laptop SMPS to try, I'm favoring a Compaq 18.5v 4.9A at the moment as that should give me a fair bit of power (hopefully, around 20W). Although I have a 20v 2.5A one which might be a bit lacking.


col.
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Old 14th July 2009, 12:46 PM   #249
gychang is offline gychang  United States
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Quote:
Originally posted by cheric
Gychang,

If you are working on the Sure 2024 board, you'd better off using the attached diagram. BTW, go to the Sure 2024 thread, there are tons of info on this subject.
Picture...courtesy of Audio1st.

thanks cheric.

gychang
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Old 14th July 2009, 02:07 PM   #250
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Quote:
Originally posted by audio1st
Hi Cheric,

Yes you are correct, here is the diagram for the TP2050 board..

As usual, you provided an excellent summary of the amp mods. Thanks Audio1st!

I was wondering if you performed further mods on the board that have not been included in your excellent and foolproof picture...
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