TPA3110 and TPS3116 amps

KR500 · « **Reply #1260 on:** 31 Dec 2014, 04:59 pm »

Quote

This one was recently given a good review on the DIY Audio forum:
http://www.amazon.com/Vgp-ac19v26-Vgp-ac19v24-Vgp-ac19v10-Vgp-ac19v11-Vgp-ac19v12/dp/B00AWLJ7VK

Anyone know of a source for a panel mount jack to fit the 6 X 4.4 mm plug tip size a lot of these 19 volt bricks have ?

I tried PE, Digi'Key and the auction place but no luck.

Update ; never mind , I just found IBM 16 volt 4/5 amp bricks that have the more readily available 2.5mm x 5.5 mm tip

murphy11 · « **Reply #1261 on:** 31 Dec 2014, 05:23 pm »

Quote from: matt_garman on 15 Dec 2014, 06:11 pm

The Astron (for example, RS-12A) power supplies are really popular. Many have commented that they are better than batteries.

Where are you located? I actually have my Astron RS-12A up on Craigslist (Chicago). Nothing wrong with it, except that I built the Sigma11 to replace it.

Thanks for selling me the RS-12A. It is in the back of my car getting cryogenically treated i(-7 wind chill in Chicago today) Looking forward to putting it into my system when I get back to Philly.

KR500 · « **Reply #1262 on:** 1 Jan 2015, 01:59 pm »

Tried the SMSL 36A Pro yesterday with a pair of more efficient TB small rangers and the Little Dot tube preamp and it's a much happier marriage.
Very nice sound.
Mojo rising .
The first listen was with a 4 ohm Klipsch MTM with Tractrix horn that is not that efficient . Not a good match.
I'm using the 36A until I get my 3110 board modded and set up.

Markvdv · « **Reply #1263 on:** 1 Jan 2015, 02:22 pm »

why would you think efficiency influences sound very much? 82dB speakers sound very good here.

KR500 · « **Reply #1264 on:** 1 Jan 2015, 03:17 pm »

Maybe it was a mismatch irregardless the efficiency
Wasn't there a post several pages back ( by Matt ? ) about this very issue ?
I went back 10 pages but couldn't spot it although I read it last week going back through the thread

gychang · « **Reply #1265 on:** 1 Jan 2015, 04:16 pm »

Quote from: Salis Audio on 18 Nov 2014, 05:02 am

My 3116 has been bumped by my version of the TDA7297. Even with Muse ES input caps (custom config) vs. Blackgate N's..... The TDA7297 sound like something in another league.

I could tell in 3 seconds.

I like TDA7297, anyone else have chance to compare?, Is your version, highly modified 7297?

Markvdv · « **Reply #1266 on:** 2 Jan 2015, 11:45 am »

Quote from: KR500 on 1 Jan 2015, 03:17 pm

Maybe it was a mismatch irregardless the efficiency
Wasn't there a post several pages back ( by Matt ? ) about this very issue ?
I went back 10 pages but couldn't spot it although I read it last week going back through the thread

Old Klipsch filters have some reputation for impedanceswings, maybe new filters are designed to match the old behavior? Impedance plays big role with these amps, looking at your speakers impedancecurve could give indication for you, 4 ohm most likely just minimum impedance at 1 frequency (like ~200hz???)

KR500 · « **Reply #1267 on:** 2 Jan 2015, 01:49 pm »

Mark , The Klipsch actually drop below 4 ohms to 3.3 but I'll have to go back and dig out the information to see where that dip is located.

nwboater · « **Reply #1268 on:** 2 Jan 2015, 06:33 pm »

KR500

If your Klipsch MTM speakers are the old theater speakers they are probably somewhat like the Klipschorns that I own. This is an old review of the Khorn by Richard Heyser and shows a lot of information about it's impedances. https://community.klipsch.com/forums/storage/3/1037187/Richard%20C%20Heyser%20KHorn%20Review.pdf

I'm also surprised that it's tractrix horn is not very efficient.

Cheers,
Rod

KR500 · « **Reply #1269 on:** 2 Jan 2015, 07:03 pm »

Yes,the tractrix horn is very efficient and if I remember correctly is padded down quite a bit with resistors.
I'll have to dig out the crossover info . A forum member on Parts Express Tech Tak forum bought the OEM crossover from Klipsch for the KLH-650 cabinet and posted the parts which I replicated and put in a 2 cu.ft. cabinet with 2 of the Klipsch metal 6.5 woofers.
The OEM cabinet was a little smaller , maybe 1.25 cu. ft. or so .
The Klipsch Klone cabs I made are in the basement by the treadmill since my main stereo room has a Class A 7 watt SET and a pair of Seas full rangers.
Different kettle of fish . It took a bit to get used to the horn at first listen.

Trikster · « **Reply #1270 on:** 5 Jan 2015, 03:57 am »

Got one of these on order. Seems to be the same design as the Audiobah green board. Now the hunt begins for all the other parts...

KR500 · « **Reply #1271 on:** 10 Jan 2015, 02:38 pm »

Just received my 3110 2 X 15 watt amp board from Sure in a nice box .
RCA input jacks are mounted on the board itself.
Now just waiting for the caps and switches from Digi-Key.

lacro · « **Reply #1272 on:** 10 Jan 2015, 02:57 pm »

Quote from: KR500 on 10 Jan 2015, 02:38 pm

Just received my 3110 2 X 15 watt amp board from Sure in a nice box .
RCA input jacks are mounted on the board itself.
Now just waiting for the caps and switches from Digi-Key.

Before ya start "ripin-n-tearin", fire it up! It sounds good right out of the box....

KR500 · « **Reply #1273 on:** 10 Jan 2015, 07:22 pm »

Thanks 'cro
Yep , just waiting on the power supply from Amazon and power jack from Parts Express so I can do exactly that.
Maybe next weekend...... hey wait a minute, I have a Pyramid 13.8 V 3 Amp PSU for my V-DAC that I can use for power.
I'm a tax return preparer so pretty limited in time this month as work is gearing up

KR500 · « **Reply #1274 on:** 19 Jan 2015, 11:43 pm »

Got a break from work and hooked up my Sure 3110 board to a pair of Amethyst speakers . Source was a Sony portable minidisc player for starters.
Right away sounds very nice at medium to lower volumes. I'll have to add a pop protection like the one Matt used on his board.
The 16 v/ 4.5 amp laptop brick I got on line has a 2.5mm barrel and was really tough to unplug . The Sure onboard jack must be for 2.1mm jacks ?
Since the Amethysts are 4 ohm cabinets I then changed to the 24V brick that came with my Dayton DTA-2 and it must be a 2.1mm plug barrel as it's a much nicer fit.
I then interfaced my Little Dot MKII+ tube preamp which the Sure board quickly didn't like as it went into shutdown mode in about a second.
The Little Dot works very well with my Topping and DTA , not the Sureboard though.

Markvdv · « **Reply #1275 on:** 20 Jan 2015, 06:28 pm »

Some mentioned earlier tpachips getting real hot with Dayton brick, inductors too, so could be unfiltered switchingfrequency???? When little dot adds a little in that frequency range it could be too much maybe???? BTW above 16V tpa3110 isn't giving anything extra imo, power is identical if I remember datasheet correctly.

lacro · « **Reply #1276 on:** 21 Jan 2015, 03:37 pm »

Quote from: KR500 on 19 Jan 2015, 11:43 pm

Got a break from work and hooked up my Sure 3110 board to a pair of Amethyst speakers . Source was a Sony portable minidisc player for starters.
Right away sounds very nice at medium to lower volumes. I'll have to add a pop protection like the one Matt used on his board.
The 16 v/ 4.5 amp laptop brick I got on line has a 2.5mm barrel and was really tough to unplug . The Sure onboard jack must be for 2.1mm jacks ?
Since the Amethysts are 4 ohm cabinets I then changed to the 24V brick that came with my Dayton DTA-2 and it must be a 2.1mm plug barrel as it's a much nicer fit.
I then interfaced my Little Dot MKII+ tube preamp which the Sure board quickly didn't like as it went into shutdown mode in about a second.
The Little Dot works very well with my Topping and DTA , not the Sureboard though.

Check the output voltage of the 24V Dayton brick. The one I have delivers more than 24V.

KR500 · « **Reply #1277 on:** 7 Feb 2015, 09:12 pm »

What wattage Weller Soldering Iron should I use on adding the mods for the Sure 3110 amp board ?
They have a 25 and 35 watt model with various tips
Right now I have the cheep n' cheerful Stahl $19 soldering station but also own a nice solid stand and would like to get a decent fixed wattage iron.
Just wondered what this threads posters used for their mods

matt_garman · « **Reply #1278 on:** 8 Feb 2015, 09:26 pm »

I have this: Circuit Specialists CS1A. 40-watt, adjustable temperature. Was $30 when I bought it, though now it says discontinued. The pointed tip it comes with is OK. I later bought 1.2mm and 1.6mm tips, and found them to be much better.

I can't remember what caused me to buy this in the first place, but it's the first decent soldering iron I ever owned, so I don't have any frame of reference. But for the amp hacking I've done, it's been just fine. I don't really find myself wishing for anything else at this point.

wushuliu · « **Reply #1279 on:** 8 Feb 2015, 11:23 pm »

Quote from: KR500 on 7 Feb 2015, 09:12 pm

What wattage Weller Soldering Iron should I use on adding the mods for the Sure 3110 amp board ?
They have a 25 and 35 watt model with various tips
Right now I have the cheep n' cheerful Stahl $19 soldering station but also own a nice solid stand and would like to get a decent fixed wattage iron.
Just wondered what this threads posters used for their mods

Hakko. Yeah, they cost a little more but the quality and handling encourages you to take on more. Best purchase I've made for diy.