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ST-35 Cap Rating Question
Posted:
Mon Dec 06, 2010 4:47 pm
by keenlyside
Building a ST-35 with the Triode reissue Transformers, the Rev C Board and Parts/Chassis. Very excited!
For C1, C2, C3, C4 the manual lists a 0.1uf 400v rated capacitor (an orange drop Vishay) but included a 630V part. I have some 400v rated film/foil capacitors I would like to use but is the 400v rating ok?
Apologize if the answer is somewhere in the forum, I did a search and could not find...
Cheers
Posted:
Mon Dec 06, 2010 5:55 pm
by TomMcNally
Welcome to the forum!
400 volt caps are fine.
Let us know if you have any questions, and post
some pix when you're finished.
... tom
Thank You
Posted:
Tue Dec 07, 2010 1:15 am
by keenlyside
Thanks Tom, thats great.
I will be back with more questions and pics. I am actually building a pair here, I had a board (rev B) and a set of Hammond Transformers I was going to build into an old chassis I have from a dead tube preamp. I gave up waiting to get the time for fiddling around with the chassis so I ordered a new chassis from Triode only to realize it does not fit the rev B board......
I think you can figure out the rest of this story as I now have all the parts for two ST-35 (a rev B and a rev C). Will be able to compare them when they are done and see how each sounds.
Cheers again and tks for the help.
John
Re: Thank You
Posted:
Tue Dec 07, 2010 5:52 am
by Ty_Bower
keenlyside wrote:I ordered a new chassis from Triode only to realize it does not fit the rev B board...
I built my ST35 around the B board. I think I still have the Visio template I used for drilling the chassis. You're welcome to it if you'd like, although I didn't use the Dynaco transformers so some modification was required.
Posted:
Tue Dec 07, 2010 7:20 am
by Geek
Now THAT is a decent aluminum plate top!
Definately not that "Reynolds wrap" Hammond/BUD flogs ;^)
Cheers!
Posted:
Fri Dec 10, 2010 1:19 am
by keenlyside
Love the studs! I should have kept some of those from my renovations
I am putting the gear into a (well ventilated) enclosed chassis so I just popped some bolt holes in the bottom where needed.
Should have some pics in a week or so.
Cheers, and tks.
Ohm it out
Posted:
Sun Dec 19, 2010 11:11 am
by keenlyside
I have finished populating the Rev C board and have only one reading that doesn't match the manual. Gnd to Pin 1 on J6 (and also on J7) is supposed to be >10M but is 0.5M on my board.
Looking at the schematic and the stuffing guide, I think 0.5M makes sense as C14 / C15 would have kept this cct above 10M but are shown in the BOM as jumpers which when installed would have the DMM reading R2 plus R4 / R1 plus R3.
Hoping for a second opinion before I move forward.
Tks, lots of fun thus far!