Hi Rudi,
The 4 PCBs with the 4 matched 2SK170 did arrive today here. Very nice PCBs ! Thank you.
Best regards
rephil
The 4 PCBs with the 4 matched 2SK170 did arrive today here. Very nice PCBs ! Thank you.
Best regards
rephil
hi rudi,
package arrived, thanks a lot! waiting for the other stuff to come in, and a quiet weekend to get started!
rudolf
package arrived, thanks a lot! waiting for the other stuff to come in, and a quiet weekend to get started!
rudolf
planned system layout
Wow these guys from Mouser are fast, ordered on 30-04-2013 18:00 CET, parts did arrive on 02-05-2013, that is form USA to Germany within 2 working Day's.
Attached a picture of the planned system layout, the heat sinks are not the final ones, just for size(hight) reference, the heat sinks in the picture are 100 x 100 x 40 the final ones will be 160 x 100 x 40 mm.
The components on the PCB's are only inserted, also for reference.
Wow these guys from Mouser are fast, ordered on 30-04-2013 18:00 CET, parts did arrive on 02-05-2013, that is form USA to Germany within 2 working Day's.
Attached a picture of the planned system layout, the heat sinks are not the final ones, just for size(hight) reference, the heat sinks in the picture are 100 x 100 x 40 the final ones will be 160 x 100 x 40 mm.
The components on the PCB's are only inserted, also for reference.
Attachments
Watch,
check your temperatures when Symasym is up to final temperature on the small sinks.
That will give you the best evidence you need to make a decision on the final size of heatsink to suit your type of operation.
check your temperatures when Symasym is up to final temperature on the small sinks.
That will give you the best evidence you need to make a decision on the final size of heatsink to suit your type of operation.
Watchtmouse: I strictly confirm Andrew's reply. Your heatsinks (the ones being shown /ordered) are too small!
Please consider to use heatsinks like these ones:
RADA4291 80MM - Kühlkörper: geprägt | Transfer Multisort Elektronik
Best regards - Rudi_Ratlos
Please consider to use heatsinks like these ones:
RADA4291 80MM - Kühlkörper: geprägt | Transfer Multisort Elektronik
Best regards - Rudi_Ratlos
Last edited:
Heatsinks
Thanks for both comments on the planned system layout.
I have attached screenshots of the Reichelt and TME specifications, in my humble opinion the specs do not differ too much.
As written in the text, I do plan larger heatsinks, planned was Reichelt part# "V 6506K", but that does not match the height of the system with the transformers in vertical position.
So I now plan to order:
DEF35
With a length of 160 mm making them 160 x 160 x 40 mm, (that should be more then sufficient)
Thanks for both comments on the planned system layout.
I have attached screenshots of the Reichelt and TME specifications, in my humble opinion the specs do not differ too much.
As written in the text, I do plan larger heatsinks, planned was Reichelt part# "V 6506K", but that does not match the height of the system with the transformers in vertical position.
So I now plan to order:
DEF35
With a length of 160 mm making them 160 x 160 x 40 mm, (that should be more then sufficient)
Attachments
measure the temperature on the small heatsink first.
Then use that data to help select another, if you still think you need to go bigger.
Then use that data to help select another, if you still think you need to go bigger.
I hope this will help: http://www.fischerelektronik.de/fileadmin/fischertemplates/download/Katalog/kuehlkoerper.pdf
PSU: Let there be light.
Build of PSU and LS-Protect boards finished successful today (LS-Protect not shown).
It was a nice sunny day, so the LED lighting is hard to see on the attached image.
The transformers are 2x25V 225VA, so the voltage on the DMM is a bit high, but OK (Theory 25V x 1,4142 = 35,36V)
Build of PSU and LS-Protect boards finished successful today (LS-Protect not shown).
It was a nice sunny day, so the LED lighting is hard to see on the attached image.
The transformers are 2x25V 225VA, so the voltage on the DMM is a bit high, but OK (Theory 25V x 1,4142 = 35,36V)
Attachments
3/4 done
Silly me I ordered the wrong L profiles 40 x 40 x 4 x 140 ( the only thing right is the 140 😉 ), I did order the right ones today 50 x 50 x 5 x 140, it is a public holiday today, so I hope they get cut and send tomorrow so I can continue on Saturday.
The 1st picture attached shows the boards, and the "BIEGELEHRE", G translate translates it as "Bending tool for bending of components", Rudi thanks for putting it on the BOM, this little thing saves lots of time.
Silly me I ordered the wrong L profiles 40 x 40 x 4 x 140 ( the only thing right is the 140 😉 ), I did order the right ones today 50 x 50 x 5 x 140, it is a public holiday today, so I hope they get cut and send tomorrow so I can continue on Saturday.
The 1st picture attached shows the boards, and the "BIEGELEHRE", G translate translates it as "Bending tool for bending of components", Rudi thanks for putting it on the BOM, this little thing saves lots of time.
Attachments
Wow, two issues found by looking at the 2nd picture I just uploaded.
- The left fuse is only partially inserted.
- The upper 2n5551 (in the middle of the board) is upside-down.
- The left fuse is only partially inserted.
- The upper 2n5551 (in the middle of the board) is upside-down.
Gijsbert, remove the jumpers from the 2-pole connectors above the 2SA1381 / 2SC3503. You will else not benefit from the on-board CAP-multiplier.
And do not forget to isolate the upper PCB-area from the ALU-L - profile.
Much luck and best regards - Rudi_Ratlos
And do not forget to isolate the upper PCB-area from the ALU-L - profile.
Much luck and best regards - Rudi_Ratlos
Watchtmouse: this looks good.
Please take care that that none of any transistors (none of their pins) that are mounted on the ALU-L has a contact (resistance) to the ALU-L.
Best regards - Rudi_Ratlos
P.S. @EVETTE: I do not have any PCBs left. But I will send you the Gerber files. Maybe you find an etching company in Canada that will etch some PCBs for you.
Please take care that that none of any transistors (none of their pins) that are mounted on the ALU-L has a contact (resistance) to the ALU-L.
Best regards - Rudi_Ratlos
P.S. @EVETTE: I do not have any PCBs left. But I will send you the Gerber files. Maybe you find an etching company in Canada that will etch some PCBs for you.