Thanks for posting some pictures and a brief impression. I hope you enjoy it, I know I enjoy mine.
Thank you for that.. Looks good.
Are those bit's of angle aluminium adequate heat sinking?
Seems as a readily (locally ) available possible solution.. if they are.
My current stumbling block..😱
As I'm balking at paying far more for some poorly made case with heatsinks than the entire amp's cost.
In fairness; Sounds through Utube even after being sourced from a toy cd player and wee 🙂 speakers is not ideal/much to base a performance impression upon.
Are those bit's of angle aluminium adequate heat sinking?
Seems as a readily (locally ) available possible solution.. if they are.
My current stumbling block..😱
As I'm balking at paying far more for some poorly made case with heatsinks than the entire amp's cost.
In fairness; Sounds through Utube even after being sourced from a toy cd player and wee 🙂 speakers is not ideal/much to base a performance impression upon.
I wonder if I can put these into my Quad303 enclosures? I really love them but time goes on. Would the cooling be enough for mono?
Regards
Regards
I don'y know enough about the Quad 303 to make a recommendation. Can you post a picture to show the available space and heat sink? These don't make a large amount of heat so the heat sink doesn't need to be excessive, though as DIY'ers we love excess 😀.
Well, monoblocking they can serve 70W if I remember right... Could be a bit more...
Pictures are everywhere on google - just search for quad 303. 🙂
I believe everything inside should go and a tranny should be mounted at the front instead. And so forth. Not very much space but thats sometimes something one needs to make the best of given that everything now is mixed in one bunch of cabling - and it still sounds good - very good. Whatever I do to them will be (almost) reversable (not including a hole or two... 😉 )
Regards
Pictures are everywhere on google - just search for quad 303. 🙂
I believe everything inside should go and a tranny should be mounted at the front instead. And so forth. Not very much space but thats sometimes something one needs to make the best of given that everything now is mixed in one bunch of cabling - and it still sounds good - very good. Whatever I do to them will be (almost) reversable (not including a hole or two... 😉 )
Regards
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These are not as hot running as some amps but they do need some type of heatsink. For sure that angle will not be sufficient by itself.
Ah, yes, I have seen those. Cute little chassis. The heat sink isn't big but should be adequate for the VSSA. Were you thinking of one channel or two per enclosure? You mentioned 'enclosures', so I'm curious if these will be VSSA mono-blocks or stereo amplifiers. Should be a cool retro-fit, especially if you can always revert back should you so choose down the road.
Yes, monoblocks. Might even go for 5.1 using these 😀... OMG - I would miss every movie 😀
Regards
Just for clarify...I just testing my amp with no proper heat sink, using my old TESLA speakers, and CD player with variable output... also is impossible to record how amp sounding.... It´s just youtube info movie.... This is no final product yet..
Just testing both channel.. I also mount bigger heatsink.. Really great sounding amp... I am worried to say loudly, but for me little bit better than SKA 🙂 I like output with only one pair ..... I also tested heatsink temperature, this is after 1 hour very loud listening..
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Hi guys,
Has anyone compared the sound if the output bias is changed from 120mA to 150mA, just curious since this would slightly reduced power dissipation of my power supply.
TIA,
Eric
Has anyone compared the sound if the output bias is changed from 120mA to 150mA, just curious since this would slightly reduced power dissipation of my power supply.
TIA,
Eric
Cool. Of course one can't pass any real judgement via a YouTube video, but those little speakers sounded like they delivered decent bass for their size.
Have you got any plans regarding an enclosure? Do you think this little amp might make it as one of your regularly used pieces of equipment? Just curious. I find I use mine often.
Have you got any plans regarding an enclosure? Do you think this little amp might make it as one of your regularly used pieces of equipment? Just curious. I find I use mine often.
yes .. movie is just for fun.. So, I will plan enclosure from Modushop.. I´d like to build this amp, Fetzilla,DX Super A and SKA + one preamp (somethink with PGA2311)...also I have to build class A amp It will be F5.. I think, that is enough for me 🙂
Rack boxy, rack krabice 19 - modushop.cz
Rack boxy, rack krabice 19 - modushop.cz
Ground loop buzz
Has anybody else had ground loop problems with the VSSA or similar amp builds?
I'm getting a low tone buzzing sound that is just audible from 3 meters away.
Would really appreciate suggestions on further analysis or a fix.
Now have a star ground lift, RCAs checked so outer casing doesn't contact backplate and soldered a bypass on R3 but buzzing persists albeit not quite as loud.
Thought I had narrowed problem with an initial wire test bypass of R3 as I could get alternate channels quiet. But may have shortened the bypass wire with R2 / D1 or touched some other part...
These are the symptoms:
1. Most buzz with both RCAs plugged in
2. Very minor buzz with only right channel RCA plugged in (can hear from 50 cm)
3. Slight buzz with right channel RCA plugged into left channel
4. Bit louder buzz with left channel RCA plugged into left or right channel (can hear from 1 meter)
5. Also buzzing out of the speaker of channel not plugged in
6. Using a B1 preamp it generated more buzzing as well as a high pitch noise
7. Plugged preamp in to TPA3116D2 chipamp - No audible buzzing
8. Plugged in mobile phone instead of CDP to preamp - buzz remains
9. Preamp RCAs not plugged in - no buzzing
10. Created deliberate ground loop without preamp plugged in (tied RCA L/R in negatives together) - Same buzzing
11. Took ground of preamp circuit to VSSA lifted star ground - more buzzing sound than usual
12. Ground of preamp circuit to chassis of preamp - Same buzzing
13. Preamp circuit ground direct to mains earth - more buzzing than usual
14. Used extension chord to different house wall socket (on different fuse) - same buzzing
15. Ran a wire directly from the RCA ground lug to the star ground - status quo
Cheers, Roger
Has anybody else had ground loop problems with the VSSA or similar amp builds?
I'm getting a low tone buzzing sound that is just audible from 3 meters away.
Would really appreciate suggestions on further analysis or a fix.
Now have a star ground lift, RCAs checked so outer casing doesn't contact backplate and soldered a bypass on R3 but buzzing persists albeit not quite as loud.
Thought I had narrowed problem with an initial wire test bypass of R3 as I could get alternate channels quiet. But may have shortened the bypass wire with R2 / D1 or touched some other part...
These are the symptoms:
1. Most buzz with both RCAs plugged in
2. Very minor buzz with only right channel RCA plugged in (can hear from 50 cm)
3. Slight buzz with right channel RCA plugged into left channel
4. Bit louder buzz with left channel RCA plugged into left or right channel (can hear from 1 meter)
5. Also buzzing out of the speaker of channel not plugged in
6. Using a B1 preamp it generated more buzzing as well as a high pitch noise
7. Plugged preamp in to TPA3116D2 chipamp - No audible buzzing
8. Plugged in mobile phone instead of CDP to preamp - buzz remains
9. Preamp RCAs not plugged in - no buzzing
10. Created deliberate ground loop without preamp plugged in (tied RCA L/R in negatives together) - Same buzzing
11. Took ground of preamp circuit to VSSA lifted star ground - more buzzing sound than usual
12. Ground of preamp circuit to chassis of preamp - Same buzzing
13. Preamp circuit ground direct to mains earth - more buzzing than usual
14. Used extension chord to different house wall socket (on different fuse) - same buzzing
15. Ran a wire directly from the RCA ground lug to the star ground - status quo
Cheers, Roger
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