TO-3 SYMASYM

[finwbu]

Hi Seldon,

solder the parts on the top side as well. The Board is a double layer.

Gruss finwbu

 

[potepuh]

FS. Black Beauty SYMASYM pcb set

FS. Black Beauty SYMASYM pcb set

http://www.diyaudio.com/forums/swap-meet/325001-fs-black-beauty-symasym-pcb-set.html#post5488647

 

[vargasmongo3435]

Hello guys sorry if I already ask this question but is been a long time is about R36 and R16 they are 499Ω both of them this mean presicion resistors? 1% tolerance or they are in fact 499Ω seems a silly question sorry about that ok a precision resistors of 500Ω can be placed right?

 

[Quantensprung]

Hello DIY fanatics

I’m very interested in a TO-3 SYMASYM. No matter in which form: ready build, only pcb or a kit

Kind Regards
Phil

 

[Rudi_Ratlos]

Phil, I do no more have any SYMASYM-PCB, neither TO3 nor TO247/TO264.
But if there is some interest, I will order a couple of PCBs.

Best regards - Rudi

 

[aubmar]

I would be very interested in a PCB set, a full kit or whatever is available.
Thanks
Aubrey

 

[brianco]

I would be very interested in a PCB set, a full kit or whatever is available.
Thanks
Aubrey

You have PM

 

[butch_vlad]

Symasym PCB and parts

Hi guys,
I have a set of un populated red TO247 PCBs and one set of populated red TO247 PCBs.

Also have lots of parts for building amplifiers so I'm thinking about donating some to the DIY community.
Only problem is that I hate posting stuff!
Anyone around London interested in building new amp?

Cheers,
Vlad

 

[HansW0rst]

Hey,

i know that its not the easiest task to troubleshoot from distance...
But i am kind of stuck with my problem and made at least some measurements 😉

I build a few Symasym and one Black Beauty has started causing problems.
They appear randomly as audible noise just like a broken, scratching potentiometer (no hum!).
The funny part is, i dont use a potentiometer but a fixed voltage devider (Signal comes from a sound card)

One Black Beauty works fine. The other one ... misbehaves.
I checked: signal line, idle current, bad soldering, grounding, signal shield


I made some measurements at the speaker ports that you can see in the pictures.
Sampelrate is 10kS/s @ 12bit for 10 Sekonds. Samplerate is a little too low.. but i guess you will see the problem anyway.
I put a Colormap on top to give you an idea about the amplitude content at low frequencies.
And a good measurement for comparison (Amplitudes may differ)

I would be really greatful for your ideas... what might be wrong... where to look.

Sammy

 

[neno70]

Hi,

I was a little bit busy the last days, but finally I cleaned up the values and names layer and created a high resolution PDF. I hope it helps in some way while building the amp.

Symasym-HiRes.pdf

Best regards,

Birger

hi file gerber ? thanks

 

[Mor7040]

good morning . are there any pcb sets still available? thanks

 

[bobina]

if someone order again, I want to buy2 pcb

 

[vasillis]

I have a pair from Rudis last revision.see attached photo.
PM please if someone is interested

 

[sanjayaun1983]

Can anyone please give me the symasym amplifier circuit with MJL4281/MJL4302

 

[joensd]

SymAsym5 - Project
I believe this is the original article.
Otherwise refer to the big thread here at diyaudio with lots of info. Several different PCBs can be bought at audiopcb.de or manufacture your own via all the designs that are floating around.

 

[Rudi_Ratlos]

Gentlemen, I have 1 spare pair of SYMASYM 5.3 left together with a dual LT3062 PSU (for the SYMASYMs frontend-PSU, if you like).

I offer you the 3 PCBs for 22€ unregistered shipping (PAYPAL fee is included).
If you are interested - tell me.

Regards - Rudi_Ratlos

 

[abc4230]

SYMASYM Platinen Transistoren

Hallo Guys
I would like to offer you Symasym kit with Sanken transistors with almost all components.

Are in swap meet
best regards alfred

 

[Atilla]

How high could I go with the rail voltage? I've got a transformer that I stripped off an old radio/amp, which is 35-0-35. I could waste a couple of volts in a CRC filter, but it might still be too high?

 

[Mor7040]

hi, I wanted to ask you if black Beauty works well with 4ohm speakers .. if so .. with what power in W .. thanks 🙂

 

[abc4230]

Voltage: 2x27VAC (+/- 38VDC)
Power 8Ohm: 65W
Power 4Ohm: 105W
Total harmonic distortion: 0.014% 5W / 8R