Joshvi, MJ777,
so we are at 6 PCBs.
Maybe some other DIY'ers show interest: I will open a new round of group-buy then.
Andrew: I offered versions for both TO3- (for example: MJ21195 / MJ21196) and TO264-transistors (for example: NJW0281 / NJW0302)
in this group-buy.
The reasons for my TO3 - offer have been:
- I layouted the TO3 - PCB version on behalf of a request of my DIY-friend Joe (see post #1)
- the thermal characteristics of TO3 - transistors are "unbeatable"
- I myself like the warm and tender "Phillysound" that the TO3s are able to produce
If it will come to a new round of group-buy, I will offer the TO264 - version (I have it as well).
Find attached a picture of the TO264 - SYMASYM ...
... and let me give you my sound impressions of it:
I have built several DIY - AMPs so far: AMPs designed by Carlos, by Ron and by Mihai, ...
For example: this is my FC-100 - build:
... and even this one has to compete very hard with the SYMASYM that I layouted.
The SYMASYM is: easy-going, fast, very black bass and smooth trebles, you can tweak it, if you want, it does not need any exotic components,
it is never-tiring, it is the "work-horse" in my home, ..., it is the most beautiful, low cost AMP that I have ever come across.
Best regards - Rudi_Ratlos
so we are at 6 PCBs.
Maybe some other DIY'ers show interest: I will open a new round of group-buy then.
Andrew: I offered versions for both TO3- (for example: MJ21195 / MJ21196) and TO264-transistors (for example: NJW0281 / NJW0302)
in this group-buy.
The reasons for my TO3 - offer have been:
- I layouted the TO3 - PCB version on behalf of a request of my DIY-friend Joe (see post #1)
- the thermal characteristics of TO3 - transistors are "unbeatable"
- I myself like the warm and tender "Phillysound" that the TO3s are able to produce
If it will come to a new round of group-buy, I will offer the TO264 - version (I have it as well).
Find attached a picture of the TO264 - SYMASYM ...
An externally hosted image should be here but it was not working when we last tested it.
... and let me give you my sound impressions of it:
I have built several DIY - AMPs so far: AMPs designed by Carlos, by Ron and by Mihai, ...
For example: this is my FC-100 - build:
... and even this one has to compete very hard with the SYMASYM that I layouted.
The SYMASYM is: easy-going, fast, very black bass and smooth trebles, you can tweak it, if you want, it does not need any exotic components,
it is never-tiring, it is the "work-horse" in my home, ..., it is the most beautiful, low cost AMP that I have ever come across.
Best regards - Rudi_Ratlos
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Joshvi, MJ777,
so we are at 6 PCBs.
Maybe some other DIY'ers show interest: I will open a new round of group-buy then.
Hello Rudi ,
Would you please put down my name for one pcb set . Thank you ,ho
So you are in for 8 PCBs at least!
Best regards - Rudi
http://www.abload.de/image.php?img=image1qga55.png
Best regards - Rudi
http://www.abload.de/image.php?img=image1qga55.png
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So: we are at 10 PCBs.
I just quoted the price. It is 12€ per PCB.
Shipment is worldwide and will cost 3.45€.
I will wait another week for further particpants and will give you payment and delivery details then.
Andrew: the use of the following transistorshas been tested and been approved:
- MJL3281A/MJL1302A
- MJL4281A/MJL4302A
- MJW0281A/MJW0302A
- MJL0281A/MJL0302A
- NJW0281G/NJW0302G
- MJL21194/MJL21193 (with min. fT of 4 Mhz !)
- MJL21196/MJL21195 (with min. fT of 4 Mhz !)
The use of Toshiba SC5200/SA1943 may result in changing the value of the feedback capacitor (see Pavel's review: symasym)
Best regards - Rudi_Ratlos
I just quoted the price. It is 12€ per PCB.
Shipment is worldwide and will cost 3.45€.
I will wait another week for further particpants and will give you payment and delivery details then.
Andrew: the use of the following transistorshas been tested and been approved:
- MJL3281A/MJL1302A
- MJL4281A/MJL4302A
- MJW0281A/MJW0302A
- MJL0281A/MJL0302A
- NJW0281G/NJW0302G
- MJL21194/MJL21193 (with min. fT of 4 Mhz !)
- MJL21196/MJL21195 (with min. fT of 4 Mhz !)
The use of Toshiba SC5200/SA1943 may result in changing the value of the feedback capacitor (see Pavel's review: symasym)
Best regards - Rudi_Ratlos
Attachments
Andrew,
I compared the datasheets of the MJL21196 (case: TO–3PBL) and MJ21196 (case: TO-3). The datasheets look almost identical.
Moreover I have sold more than 100 TO-3 SYMASYM PCBs and did not yet receive any complaint about a malfunction, ...
Pavel reduced the value of the feedback capacitor to 3pF in order or prevent oscillations, in case the mentioned Toshiba transistors are used.
Best regards - Rudi
P.S. The currently offered SYMASYM will feature TO-264 / TO-3P case transistors.
I compared the datasheets of the MJL21196 (case: TO–3PBL) and MJ21196 (case: TO-3). The datasheets look almost identical.
Moreover I have sold more than 100 TO-3 SYMASYM PCBs and did not yet receive any complaint about a malfunction, ...
Pavel reduced the value of the feedback capacitor to 3pF in order or prevent oscillations, in case the mentioned Toshiba transistors are used.
Best regards - Rudi
P.S. The currently offered SYMASYM will feature TO-264 / TO-3P case transistors.
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