Ask at Badel,
my 400VA Transformer (4x 25 V Secondaries), including Schirmwicklung, Low-Inductance Version, Magnetic shield, cup epoxy moulded was only 65 €s. This is the one I currently use with the standard Birger's Symasym PCBs and is far more then sufficient.
Really quick shipping (around 2 weeks), and absolutely high quality from these guys.
Regards,
Fabian
I can mail u a picture if u want some reference for Badel, so communication with them goes more quickly ;-)
Edith says: picture from Badel of course, no photograph of my transformer ;-)
Edith says: picture from Badel of course, no photograph of my transformer ;-)
Trafo options
meanman1964 and Fabian85,
Both thanks for your hints, however I did not have an issue selecting the transformer (now I have, the Schuro tranformers are tempting)
Schuro sells interesting products for a reasonable price.
Badel at seem to produce to order, so I have to specify the product, that is a bit too much for me.
Schuro and ringkerntrafo.nl are webshops, where ringkerntrafo.nl gives you the full specification of the product, where Schuro does not have specs for the transformers online.
I have ordered stuff from ringkerntrafo.nl before and they ship fast (in the netherlands within two days)
Edit: I did remove the links to Schuro and Badel
Bert
meanman1964 and Fabian85,
Both thanks for your hints, however I did not have an issue selecting the transformer (now I have, the Schuro tranformers are tempting)
Schuro sells interesting products for a reasonable price.
Badel at seem to produce to order, so I have to specify the product, that is a bit too much for me.
Schuro and ringkerntrafo.nl are webshops, where ringkerntrafo.nl gives you the full specification of the product, where Schuro does not have specs for the transformers online.
I have ordered stuff from ringkerntrafo.nl before and they ship fast (in the netherlands within two days)
Edit: I did remove the links to Schuro and Badel
Bert
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Hello Rudi,
I'm really happy that I can finally participate in a group buy.
As you stated that the ordering will end Monday 11th we are really
close to the end.
I would like to participate and order :
2 x Black Beauty PCB
2 x 2 Pairs of NJW0281/NJW0302
2 x 2 x 0R22 Resistor
2 x MKT1822/10µ + MKT1837 10nF
1 x Shipping to Germany
1 x Paypal fees
Additionally I would favour to have the PCBs cut into pieces.
It's ok for me to use Paypal to pay for the parts.
Am I right that this order is sufficient to build a stereo version of the amp (with the rest of the parts on the BoM) ?
Is there any estimation for the time of delivery ?
Best regards,
TrustinTech
I'm really happy that I can finally participate in a group buy.
As you stated that the ordering will end Monday 11th we are really
close to the end.
I would like to participate and order :
2 x Black Beauty PCB
2 x 2 Pairs of NJW0281/NJW0302
2 x 2 x 0R22 Resistor
2 x MKT1822/10µ + MKT1837 10nF
1 x Shipping to Germany
1 x Paypal fees
Additionally I would favour to have the PCBs cut into pieces.
It's ok for me to use Paypal to pay for the parts.
Am I right that this order is sufficient to build a stereo version of the amp (with the rest of the parts on the BoM) ?
Is there any estimation for the time of delivery ?
Best regards,
TrustinTech
Besides the parts of the BoM and the one's you ordered you will need matched 2SK170BL and a transformer / transformers.
Gentlemen, this group-buy is closed now and I will not accept any further requests.
Find attached the final order list.
I could reduce the price for nearly every component, since we have reached a lower scale of discount (>25 of each).
I ask you to transfer the the final amount (given in column TOTAL; the curreny is € !) to my PAYPAL account: RRozek@t-online.de.
I will order the components, after I have received all of your transfers.
It normally takes about 4 weeks, until I will receive the etched PCBs.
I will then send you all of the ordered components.
I will send to you all a Builder's Guide (written in English), drill template, ... vial EMail.
Please make sure that your home- and EMail-address matches the one that you have stored in the PAYPAL form.
I revised the BoM of the SYMASYM- / Speaker Protect- section.
Here is it:
https://secure.reichelt.de/index.html?&ACTION=20&AWKID=940926&PROVID=2084
The BoM of the PSU-section did not change:
https://secure.reichelt.de/index.html?&ACTION=20&AWKID=939684&PROVID=2084
Please do not blame it on me, if the BoMs are not 100% complete (I have done my best though!).
The BoM does not include:
- transformer
- heatsinks
- input differential transistors (my advice is to either use 2SK170, MPSA18 or BC550C)
I will now wait for your money transfers.
Best regards - Rudi_Ratlos
Find attached the final order list.
I could reduce the price for nearly every component, since we have reached a lower scale of discount (>25 of each).
I ask you to transfer the the final amount (given in column TOTAL; the curreny is € !) to my PAYPAL account: RRozek@t-online.de.
I will order the components, after I have received all of your transfers.
It normally takes about 4 weeks, until I will receive the etched PCBs.
I will then send you all of the ordered components.
I will send to you all a Builder's Guide (written in English), drill template, ... vial EMail.
Please make sure that your home- and EMail-address matches the one that you have stored in the PAYPAL form.
I revised the BoM of the SYMASYM- / Speaker Protect- section.
Here is it:
https://secure.reichelt.de/index.html?&ACTION=20&AWKID=940926&PROVID=2084
The BoM of the PSU-section did not change:
https://secure.reichelt.de/index.html?&ACTION=20&AWKID=939684&PROVID=2084
Please do not blame it on me, if the BoMs are not 100% complete (I have done my best though!).
The BoM does not include:
- transformer
- heatsinks
- input differential transistors (my advice is to either use 2SK170, MPSA18 or BC550C)
I will now wait for your money transfers.
Best regards - Rudi_Ratlos
Attachments
Rudi, thank you very much for your work! Can't wait to get my hands on it!
By the way: the numbers and values of the resistor link you gave me via PN did not change? So if its ok for you, can i post it here for other people who, like me, prefer to use higher quality resistors like Vishay / PRP / Takman. Since they are no "few cent parts" like the Reichelt resistors, it is a nice to know orientation how many one would have to order.
Regards,
Fabian
By the way: the numbers and values of the resistor link you gave me via PN did not change? So if its ok for you, can i post it here for other people who, like me, prefer to use higher quality resistors like Vishay / PRP / Takman. Since they are no "few cent parts" like the Reichelt resistors, it is a nice to know orientation how many one would have to order.
Regards,
Fabian
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Hi Rudi,
thank you very much for your effort and time to make this group buy happen!!
Money transferred via Paypal🙂
All the best wishes,
Michael
thank you very much for your effort and time to make this group buy happen!!
Money transferred via Paypal🙂
All the best wishes,
Michael
Gentlemen, Watchtmouse, WillNamennichtnennen:
I do currently have no Soft-Power-On PCBs at hand.
But I can order 10pcs. of the one shown in the attached image.
The size of the PCB is 90 x 69mm; its colour is green; its price is 4.50€ per PCB.
It can be used for 230VAC/50Hz (you need an EI30-1 transformer / 12VAC) as well as for 115VAC/60Hz (you need the TAMURA 2FD-212).
The schematic uses a LM555 timer module and 2 relays.
The top relay is closed as soon as the 7812 voltage regulator shows 12VDC on its output. At this time the current is limited by 2 NTCs (the shown values are a proposal).
As soon as the delay time (determined by the 100K resistor and 10µF capacitor - giving a delay of about 1.1sec) has expired, the bottom relay will close, bypass the NTCs and the mains current flows unhindered.
Best regards - Rudi
I do currently have no Soft-Power-On PCBs at hand.
But I can order 10pcs. of the one shown in the attached image.
The size of the PCB is 90 x 69mm; its colour is green; its price is 4.50€ per PCB.
It can be used for 230VAC/50Hz (you need an EI30-1 transformer / 12VAC) as well as for 115VAC/60Hz (you need the TAMURA 2FD-212).
The schematic uses a LM555 timer module and 2 relays.
The top relay is closed as soon as the 7812 voltage regulator shows 12VDC on its output. At this time the current is limited by 2 NTCs (the shown values are a proposal).
As soon as the delay time (determined by the 100K resistor and 10µF capacitor - giving a delay of about 1.1sec) has expired, the bottom relay will close, bypass the NTCs and the mains current flows unhindered.
Best regards - Rudi
Attachments
Would you recommend it over the PCBs from the Analog-Forum community? The Green one with the relay, 1 NTC and without any transformer? Is it any better? 🙂
Hi Rudi I dont need a soft-power-on pcb anymore. I'm in contact with Badel to buy a transformer similar Tod Fabian's. There you can also buy transformers with a soft-power-on function, which I want to use.
@Fabian, WillNamennichtnennen, ...: if you are planning to buy a 400VA/4x25VAC transformer from BADEL, as specified by customer, with all extras ("Schickimicki"), I would like and join you and buy one myself!
Maybe one of you can start a "transformer-groupbuy" for the BADEL's transformer (here in this thread).
The way I have layouted this SYMASYM "cries" for a transformer like this!
Best regards - Rudi
P.S.: Nobody needs a Soft-Power-On PCB unless the consumed power is significantly higher han 500VA.
P.P.S.: A "green" forum's name means: "Money received".
Maybe one of you can start a "transformer-groupbuy" for the BADEL's transformer (here in this thread).
The way I have layouted this SYMASYM "cries" for a transformer like this!
Best regards - Rudi
P.S.: Nobody needs a Soft-Power-On PCB unless the consumed power is significantly higher han 500VA.
P.P.S.: A "green" forum's name means: "Money received".
Attachments
Gentlemen:
I can choose between a "brilliant black" - and "matt black" - PCB-surface.
Which one shall I take?
Rudi
I can choose between a "brilliant black" - and "matt black" - PCB-surface.
Which one shall I take?
Rudi
I prefer the matt black.
Fabi already has the transformer and I think the organisation of a groupbuy would be too much for me. What I can do is posting the schematic drawing oft the transformer with its specifications.
Fabi already has the transformer and I think the organisation of a groupbuy would be too much for me. What I can do is posting the schematic drawing oft the transformer with its specifications.