• These commercial threads are for private transactions. diyAudio.com provides these forums for the convenience of our members, but makes no warranty nor assumes any responsibility. We do not vet any members, use of this facility is at your own risk. Customers can post any issues in those threads as long as it is done in a civil manner. All diyAudio rules about conduct apply and will be enforced.

TO-3 SYMASYM

Jump to Latest
#21
Stevie,

I will make them available.

The price depends on how many orders I will receive.

The price will be 11€, if I order 10 PCBs, it will be 9€, if the quantity that I order exceeds 25 PCBs.

I have closed the German group-buy 2 weeks ago, expect the PCBs to arrive by the end of this week and will wait for the first feedbacks of the German DIYers, until I will offer these PCBs in this forum as well.

Best regards - Rudi_Ratlos
 
#25
Hi Rudi,

I like the design of this amp a lot and much prefer the T03 devices. Local decoupling of these, the Cap multipliers and good layout round it off nicely.

Do you think you could please put me down for 4 Boards when they become available. The plan is for 2 X Bridged monoblocks.

Regards and thanks

John
 
Last edited:
#28
I am very happy (and a little bit proud) to tell you that I received several very positive feedbacks of my German DIY - friends.

The TO-3 SYMASYM V2 - PCB that I offered them is perfect.
It is absolutely error-free (!), and - what is more important -: this AMP "can play (with) your music."
It is praised for its silk highs, mature, real midranges and controlled, black bass.

I will offer this PCB to you now: the group-buy for the TO-3 SYMASYM V2 is open!

I (!) cannot compete with the technological skills of the Brazilian or Australian AMP Guru, offering AMP PCBs currently as well!

But the TO-3 SYMASYM can compete with their creations! I am absolutely sure about this!
The SYMASYM has been designed by Michael Bittner.

Refer to this thread please:

http://www.diyaudio.com/forums/soli...ifier-designed-michael-bittner-our-mikeb.html

I merely changed the output to include a pair of TO-3s (my hommage to the TO-3 sound).
(Rumours have it that OnSemi will discontinue the production of TO-3s.)

I also included CAP-multipliers with clipping diodes, so that my TO-3 SYMASYM can be operated from a wide range of transformers,
and layouted it on PCBs with the best quality that you can imagine.

This is the result:



http://www.abload.de/img/to-3_symasym_birger97v1.jpg

You can go for it!

What will I offer you?

A PCB with the best available quality (2mm FR4 PCB, plated-through holes, 70µm copper tracks, covered with gold immersion,
proven layout, ..., simply: perfect),
the TO-3 SYMASYM Builder's Manual, the BoM, the needed 4 pairs of output-transistors (MJ21193/MJ21194) for the 1st three of you,
who want to have, ... and an incredibly life, real and beautiful sound.

The price?

11€ per PCB if I receive orders for less than 10PCBs (that would be a shame) , 9€ per PCB, if I receive orders for more than 25 PCBs.

Shipment is: 3.45€ worldwide.

Best regards - Rudi_Ratlos
 
Last edited:
#32
Great job Rudi. I'm in for 2 boards.
Also interested in the "small kit" mentioned on post #15 and/or in output transistors for a stereo set, if available. Can you please send me cost details?

Thanks and regards
Igor
 
#34
Thank you very much for your interest, gentlemen!

Since I have been asked, I will offer you as well:

1) a PSU PCB
The size of the PSU - PCB is: 125 x 85mm.



http://www.abload.de/img/psupcb2zvu.jpg

2) a Speaker Protection PCB
The size of the LSProt - PCB is: 68 x 39mm. You need one PCB per speaker.




http://www.abload.de/img/lsprotpcb9btr.jpg

...and ...

3) a Soft-Power-On PCB
The size of the SPO-PCB is 100 x 65mm.



http://www.abload.de/img/spowlc6.png

I will give you further details on these PCBs later on.
All of these PCBs have supreme quality and are 100% approved.
(I prototyped the Soft-Power-On PCB but did not yet have it etched professionally.)

@Gig: I will not offer the "small kit" (consisting of TO-3s, emitter resistors, ALU-L profiles, ...), because the kit will increase the shipping costs immensely!

There is only one drawback concerning my offer (and I am a little sad about this):
Once you have listened to my TO-3 SYMASYM, you will no more visit this forum, you will no more look at my current creations, ...

"You will have found your sound."

This is the current "interested party list":



http://www.abload.de/img/image1j79i.jpg

Best regards - Rudi_Ratlos
 
Last edited:
#35
Woohoo!

Hello Rudi,

I was so badly hoping there would be another round...

Please put another 4 TO-3 Symasym PCBs on your list for me.

I am impressed with the effort you put up to supply us with these lovely boards!
Keep up the good work!

Sascha
 
#36
Is that really you, Sascha?

Since it is raining "cats and dogs" in Hamburg, I took my time to complete the 2nd channel of my own TO-3 SYMASYM.

I drilled the ALU-L profiles for my PCB (this is how I do it- I will give you the drill-pattern as well):



and started to solder the BD139 - Tempco and the TO-3s:



http://www.abload.de/img/mypcbtk0e.jpg

Do not worry, gentlemen!

You do not have to assemble a complicated heatsink like I have done!

Your Version 2 - PCBs will have the drivers sitting on the ALU-L profile!
Have a Look at post #28! Your PCBs will be "perfect"!

But: isn't DIY beautiful? To saw, to drill, to solder, ..., and finally listen to an AMP like this, "to YOUR AMP"?

Best regards - Rudi_Ratlos
 
#37
Hello Rudi,

If you mean Sascha from the german AAA-Forum I have to disappoint you.

I have thought about buying all TO-92 transistors (plus a lot extra for matching) off digikey since they have all the needed small signal transistors (including MPSA18) from ON-semi in stock.
It´s quite a bit dearer of course compared to the parts that you and I guess most of our german fellows have bought from Reichelt.

But would the extra cost be worth going for ONs?

Regards,
(The other) Sascha 😉
 
You must log in or register to reply here.
Top Bottom