Here are the Sowter 3575C and Cinemag CMLI-15 transformer's overlapped -- Pin 7 of the Cinemag connects to a shield which isn't present on the Sowter, and Pin 2 connects to an optional second shield.
Unless there are any corrections, I am going with this layout --
Unless there are any corrections, I am going with this layout --
An externally hosted image should be here but it was not working when we last tested it.
I just sent the files to the board house before dinner -- I'm keeping my fingers crossed as this is the first time I have used them.
I inverted the colors, which may make it a bit more readable -- I've allowed for WIMA 0.47u/400V and Vishay 0.47u/630V on the output side.
Hopefully, the 4 slots allow the boards to be snapped apart if needs be (or you can use metal shears to separate). I have allowed the use of Molex 0.100" headers and cables to attach the potentiometers, etc.
I think it takes 10 days:
I inverted the colors, which may make it a bit more readable -- I've allowed for WIMA 0.47u/400V and Vishay 0.47u/630V on the output side.
Hopefully, the 4 slots allow the boards to be snapped apart if needs be (or you can use metal shears to separate). I have allowed the use of Molex 0.100" headers and cables to attach the potentiometers, etc.
I think it takes 10 days:
An externally hosted image should be here but it was not working when we last tested it.
SY said:My "wishes" are to get my hands on one of these boards!
Nothing to protect, I do this stuff for fun.
Guiness said:
Let's see how they work first. I will get rid of them at cost.
I'm going to mount my transformers on spacers so that they can be removed easily (if necessary). There are no traces for the heaters, you'll have to hard wire them. I did put in a couple of vias for the bypass on the 6SN7.
Anyone want to comment on the applicability of the 12V version of the 6SN7 -- j'ai beaucoup de ces animaux.
Hi Jack,
For the breakaway slots it is best to have the two slots closest to the edges of the board actually exit the edges of the board. It produces a much cleaner result on the corners and the cleanup of the edge is quick and easy.
The board house may get in touch and suggest this or they may go ahead and set it up this way anyway.
Graeme
For the breakaway slots it is best to have the two slots closest to the edges of the board actually exit the edges of the board. It produces a much cleaner result on the corners and the cleanup of the edge is quick and easy.
The board house may get in touch and suggest this or they may go ahead and set it up this way anyway.
Graeme
Including shipping to the US, they cost me $7.08 each -- that takes into account a free board for SY. I do have to recapture the PayPal fees and shipping (Priority), so I figure $12.55. Outside the US there's a fee on FX and priority Mail is $12.30.
I used the wrong pinout for the DN2540N5 -- so the device has to be flipped and manipulated a bit. Looks like a pair of Irish step-dancers:
If anyone wants, I will include 4 devices soldered in correctly, with heat shrink AND the correct R5 for 8mA. It only takes a minute or two to get it right -- I have used 2k2 in parallel with 300R (=264R) and one channel is 7.98 mA, the other 7.96mA. PM me if this is what you want.
The octal tube socket fits fine but some octals may need to have their pins bent a bit to fit.
I have yet to test the critter -- I just got done soldering them up.
The Sowter transformers fit just fine. I figured the spacing from their engineering drawing. I would expect the Cinemag's to work the same.
I used the wrong pinout for the DN2540N5 -- so the device has to be flipped and manipulated a bit. Looks like a pair of Irish step-dancers:
An externally hosted image should be here but it was not working when we last tested it.
If anyone wants, I will include 4 devices soldered in correctly, with heat shrink AND the correct R5 for 8mA. It only takes a minute or two to get it right -- I have used 2k2 in parallel with 300R (=264R) and one channel is 7.98 mA, the other 7.96mA. PM me if this is what you want.
An externally hosted image should be here but it was not working when we last tested it.
The octal tube socket fits fine but some octals may need to have their pins bent a bit to fit.
I have yet to test the critter -- I just got done soldering them up.
The Sowter transformers fit just fine. I figured the spacing from their engineering drawing. I would expect the Cinemag's to work the same.
