Collecting...
Mr. Pass: do you have the reference of the Cinemag one?
@ColinA123: link to the PCF mod?
@2 picoDumbs:
- trimpots type (standard?) and value?
- cascode option sketch, please use my PDF schematics (transistor type, values and so on)
Thinking about transformer daughter board, but not very happy about "Eier liegende Vollmich Sau", but only idiots never change mind!
I´ve found provider for custom Mu-Metal shielding, will request quotation for Jensen shielding can.
Mounting holes in the middle of UMS definition revision 2.0 don´t exists: would be nice, so revision 3.0?
First placement without improvement ready, will post soon...
JP
Mr. Pass: do you have the reference of the Cinemag one?
@ColinA123: link to the PCF mod?
@2 picoDumbs:
- trimpots type (standard?) and value?
- cascode option sketch, please use my PDF schematics (transistor type, values and so on)
Thinking about transformer daughter board, but not very happy about "Eier liegende Vollmich Sau", but only idiots never change mind!
I´ve found provider for custom Mu-Metal shielding, will request quotation for Jensen shielding can.
Mounting holes in the middle of UMS definition revision 2.0 don´t exists: would be nice, so revision 3.0?
First placement without improvement ready, will post soon...
JP
So 2 configurable daughter boards, one for Jensen, one for Cinemag. Cinemag has 12 pins, Jensen has 8 pins.
http://cinemag.biz/output/PDF/CMOQ-4.pdf
http://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-123-flpch.pdf
http://cinemag.biz/output/PDF/CMOQ-4.pdf
http://www.jensen-transformers.com/wp-content/uploads/2014/08/jt-123-flpch.pdf
Last edited:
Not sure exactly what you mean by middle, but many amp chassis are made using split heat sinks, so having mounting holes in middle won't work for quite a few people (me included).
Single turn is adequate for this location, same type as on ACA, and BA3 etc.
Have to go to work.
Last edited:
Ideally daughter boards will be interchangeable between F6 and this circuit, so we just need to make the daughter boards user-configurable by using links.
Attachments
I'm considering that voltage dividing with cmf55 resistors maybe more desirable than trimpot.
You could add both options on the board.
Thanks you Mr. Pass but only colours for wired version defined. Missing winding allocation to PCB pins 1 to 12.
JP
JP
Got conjunctivitis, can't stare at the computer for more than a minute.
I'll have it finished today though.
R18 R19 R20 R21 are to indicate cmf55 resistors, but some people might prefer a trimpot, there is probably plenty of room for both options. Anything between 50 Ohms and 100 Ohms is appropriate. For people wanting the original circuit just place links across R18, R20.
Add links across q1 q2 for people who don't want cascode.
I'm intending to use D grade LSK170/J74, so intend to use these heatsinks WA-T247-101E Ohmite | Fans, Thermal Management | DigiKey
I will test first to make sure they are appropriate.
Add links across q1 q2 for people who don't want cascode.
I'm intending to use D grade LSK170/J74, so intend to use these heatsinks WA-T247-101E Ohmite | Fans, Thermal Management | DigiKey
I will test first to make sure they are appropriate.
Attachments
