AKG C-12 point to point boards for Apex 460 Alctron HT-11A, ShuaiYin,SYT-1200 !!
$120.00 a set!
http://groupdiy.com/index.php?topic=53970.0
I would recommend at this stage to use
The Matador/Chunger PSU if you can't workout how to
mod the Apex unit, as It's probably the safest way...
Email your interest or support to [email protected]
$120.00 a set!
http://groupdiy.com/index.php?topic=53970.0
I would recommend at this stage to use
The Matador/Chunger PSU if you can't workout how to
mod the Apex unit, as It's probably the safest way...
Email your interest or support to [email protected]
Suggested parts list
C 12_ 75-V730P105X9250 Film Capacitors 1uF(original mic Is .5uf) 250volts 10% Axia qty=1
R 11, R 16 588-MOX-200003005JE 30M Thick Film Resistor, qty=x2
R 17 71-RN60D-F-100K Metal Film Resistor - 100Kohms 1% qty=1
R 15,R14 588-MOX-300002506FE 250M Thick Film Resistor, 1% qty=2
R 12,R 13 71-RN60D-F-499K Metal Film Resistor - 499Kohms 1% 100ppm qty=2
c 11,C 16 JustRadios.com / ETC 5000pF, 630V Polystyrene Film Axial qty=2
C-13 JustRadios.com / ETC 1000pF, 630V Polystyrene Film Axial qty=1
C12 circuit
C12 physical layout and schematic assumes Psu 120v -1v Bias at pin 4
http://openplanrecording.files.wordpress.com/2013/06/akg-c12-schematic.pdf
Ok Lets Build it!!
Ok Now make your self a template with for the mounting screws. The spacing from top to bottom is as follows
6mm 51mm 76mm and 115mm...
Use a 2 mm bit for metal and drill very slowly so as not to overheat and blunt the the bit!!!
Now don't drill through just yet we are just marking the metal at this point!!
Ok you can put the drill all the way through now...
what I haven't shown here is that you'll need to counter sink the outside of the holes on the mounting rails
in order that the screw sits flush with the rail otherwise you'll have difficulty sliding the body on. What i do is use a battery drill with a Philips tip and push it into the hole while drilling, much like carpenters do when working with wood..
Be very gentle installing the boards!! Don't force it and to be safe it's good idea to use precision
screwdrivers as these little guys wont allow you to over tighten the screw and risk cracking the boards!!
The best way to install the bottom transformer board is to start all of the screws and work you way around evenly and gradually tightening.
Use distilled water to cool and clean solder joints(NO IPA!)