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Old 5th January 2007, 02:42 AM   #91
Pano is offline Pano  United States
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I'm a big fan of the 2020 chip, too. Very musical.

The TA2020 has a few other advantages.
1) It can run at a higher voltage than the TA2024 - so a little more power.
I run them at 14.6V no problem. With good heatsinking the chip never gets warm, even into a 4 Ohm load. I would guess that 15V should be no problem.

2) For whatever reason, the TA2020 seems to get closer to power rail voltage before clipping than its smaller brothers. The TA2020 can get to within 1V of the rails, the others seem to never get closer than 2V. That helps power.

The on chip Tripath amps I've heard sound a lot alike - no surprise - but I do like the TA2020 best.
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Old 6th January 2007, 02:02 AM   #92
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Default No monobloc!

Quote:
Originally posted by panomaniac
What do you mean by monoblock? Two amps, one for each speaker?
Yes, one amp per speaker. Since posting this question, I read, I think it was on Panomaniac's site, that such a monobloc arrangement is not possible with T amps because they are already bridged.

I know little about the circuit design, building, etc., so I need to rely on others. Anyhow, I did see the process of "stapling" jumpers on the Trends unit mentioned and wonder if that would be applicable for using one amp per channel.
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Old 6th January 2007, 06:30 AM   #93
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Yes, you could do that.

You only need to combine the inputsof you want to use both outputs. Say for example to biwire your speakers.
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Old 7th January 2007, 01:18 AM   #94
EdT is offline EdT  Canada
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Default Rewiring and Cleaning Up TA-10

I finally got a chance to redo the wiring and clean-up the top and bottom side of the PCB. I was fortunate enough to find some 18 AWG tin copper Teflon wires at a local electronic surplus store and it even came in yellow like the original wires. They had no idea what they were selling to me cause Teflon wire is usually big$$$ !

Here is how my TA-10 amp looked like once it was opened. Notice the hideous soldering workmanship of the wiring. The jacket material is melted into the solder cups and terminals and there is no gap between the wire jacket and the soldering joints. Another thing I noticed was that there was barely any wire in the soldering cup and only 2-3mm that was tacked onto the cup. Another thing I noticed was that two different type of wires gauge was use, 20 AWG(orange) for the RCA jacks and 18 AWG(yellow) for the speaker jacks. The reason I found later on was the drill holes on the PCB can only accomandate 20AWG for the RCA jacks, a little too small for my liking as an input signal. I was able to insert 18 AWG wire very snuggly into the RCA drill holes once I cleaned out the solder with solder wick and compressed air . Yay, I can now used 18 gaguge for the input signal !
Click the image to open in full size.

Top view after redoing the wiring, I also added a custom fitted heatsink on top of the Tripath chip, don't know if it get warm, but anyways I had one lying around.
Click the image to open in full size.

Front end view of the rewiring
Click the image to open in full size.

Notice the required gap(Diameter of the core wire) of the jacket material and the solder joint on the PCB and the solder terminals and cups. You will also noticed that there is no fraying of the jacket material due to melting, but then again using Teflon eliminates that problem that is common on PVC insulations.
Click the image to open in full size.

The wire must be strip to a length that it touches the bottom of the cup once it is inserted plus enough for the required gap between the solder joint and the wire insulation. The original solder joint only had about 2-3mm of wire inserted and worse the cup was not properly filled with solder leaving air pocket in the solder cup with only the lip of the cup having any contact with the wire. Notice the proper way to fill a solder cup, you will see a concave wetting fillet of solder and the strands of the wire is still discernable. This is the proper way to fill a solder cup, it is Mil spec and NASA standards used in mission critical applications !
Click the image to open in full size.

Another shot of the soldering cup for the right RCA jack
Click the image to open in full size.

After soldering clean off all flux residue with achool and a cotton swab and the solder joints should look all shiny like jewellery !
Click the image to open in full size.
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Old 7th January 2007, 01:58 AM   #95
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I also notice now that there is now a white component on the power jack that was not on earlier TA-10 builds. Anyone know what it does ?
Click the image to open in full size.
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Old 7th January 2007, 03:14 AM   #96
Pano is offline Pano  United States
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It's a filter cap on the incoming DC.

It's always been there, itís just not in my photos.

Thanks for the photos. I may follow your lead and dip the PCBs in alcohol to remove the flux. It's true that the build quality could be better. But it's a barging amp.
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Old 10th January 2007, 01:34 AM   #97
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Yesterday I have received my Trends Audio amplifier that, according to the front, is a 'Class-T Amplifier TA-10.1'

Is anyone aware of the .1 version and what the difference is with the original TA-10?
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Old 10th January 2007, 03:32 AM   #98
EdT is offline EdT  Canada
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Quote:
Originally posted by windowlicker
Yesterday I have received my Trends Audio amplifier that, according to the front, is a 'Class-T Amplifier TA-10.1'

Is anyone aware of the .1 version and what the difference is with the original TA-10?


No idea, fire an email to David at Trends Audio for an answer.
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Old 10th January 2007, 09:00 AM   #99
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Question Listening comparisons.....

Hi Everyone,

Been listening to the Arcam D290Ps in stereo biamp config. Although there is more power available (2 x 70 WPC), I think I prefer the detail of the TA-10!!! I'll continue listening for a few more days......

Going to visit the big boys this weekend. I'll be bringing the TA-10 along to compare with a Krell (can't remember which integrated model it is) and to run in a very high end sysyem (if they let me!! ). I'll report back!

Cheers

Jon

ISTR there is a 100 WPC Tripath amp. I might be tempted to give it a try while I'm waiting for my Aleph X kits to build themselves!!
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Old 10th January 2007, 05:32 PM   #100
EdT is offline EdT  Canada
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I am thinking of replacing the 2.2uF Bennics with Mundorf 2.2uF MKP series, would that be any benefit or is the Bennics good enough ?
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