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2NV73

ASSEMBLY GUIDE

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Summary of Contents for 2NV73

Page 1: ...the DON classics www thedonclassics com 2NV73 ASSEMBLY GUIDE REV 1 00 the DON classics 2018 Page 1 of 29...

Page 2: ...SSEMBLY GUIDE 6 STEPS TO MIC PRE EQ HEAVEN 1 Solder parts on PCBs 2 Place PCBs in metal work 3 Make ribbon cables 4 Initial test 5 Set bias 6 Attach face plate knobs Record the DON classics 2018 Page...

Page 3: ...51X lunchbox A Refer to page 8 Q How do I set up the unit to use 24V of my 51X lunchbox A Refer to page 8 Q I have never made ribbon cables before is it difficult or time consuming A The opposite All...

Page 4: ...e particularly sensitive to heat So try not to take too long when soldering them Before soldering the DI PCB decide whether you will use 24V or 24V when powering the unit via a 51X lunchbox See page 8...

Page 5: ...The BA PCBs will look like the following the DON classics 2018 Page 5 of 29...

Page 6: ...ign the pots straight then just solder the middle pins Check alignment and if not ok you can heat the middle pin again and adjust When happy finish soldering the other pins EQpots PCB top EQpots PCB b...

Page 7: ...Switches PCB top Switches PCB bottom the DON classics 2018 Page 7 of 29...

Page 8: ...NOT be using the negative 24V rail of your 51X lunchbox you will solder it as per 24V The DI will work on both 51X and internal PSU switch options If you WILL be using the negative 24V rail of your 5...

Page 9: ...To solder the DI PCB Common parts to both 24V and 24V powering options the DON classics 2018 Page 9 of 29...

Page 10: ...For 24V option standard Parts soldered as per top silkscreen the DON classics 2018 Page 10 of 29...

Page 11: ...B This feeds the voltage rail to the DI PCB Either 24V or 24V 24V 24V The switches PCB will need to be jumpered for 24V or left unjumped for 24V 24V 24V And that s all you need to do for powering opti...

Page 12: ...ron so that the pins don t move and misalign Or you can use blu tack again to hold the pins in place while you solder Using foam taped down to hold in PCB pins whilst soldering TIP You may like to sol...

Page 13: ...CB for an extra cap to make an extra frequency without affecting the rest of the circuit so it was added as a secret extra frequency You can of course have 7 here as per the original but really no rea...

Page 14: ...ded cable You will connect the shield only at one end pin marked 0V Input transformer PCB screw mount Be sure to push the screw mount for the input transformer hard enough into the PCB so its legs go...

Page 15: ...The main PCB will look like this the DON classics 2018 Page 15 of 29...

Page 16: ...the DON classics 2018 Page 16 of 29...

Page 17: ...egs for the pins Leave them long and cut them to length later when aligning in the metalwork to ensure they are the correct length Input transformer PCB The Input transformer will be attached to the m...

Page 18: ...Bs and into the MAIN PCB Using blu tack you can set the appropriate height and hold it in place Then we can solder the PCB pins from above We will then cut off the tops of the PCB pins and all is done...

Page 19: ...For the DI PCB The legs will be longer on the DI PCB as it needs to align with the DI jack on the back panel 20mm is fine here the DON classics 2018 Page 19 of 29...

Page 20: ...For the EQpots PCB you will fit the standoffs like this Adapters You will fit the adapters on to the pots before screwing the EQpots PCB into the MAIN PCB The holes will line up to tighten the grub s...

Page 21: ...For the hi shelf pot the DON classics 2018 Page 21 of 29...

Page 22: ...ou will fit the standoffs and L bracket like this Note the difference depending if the unit is for slot 1 or slot 2 in the 2NV Rack The switches PCB in slot 1 The switches PCB in slot 2 the DON classi...

Page 23: ...the headers line up as shown black will be pin 1 if using a coloured ribbon cable One at a time line up the headers correctly straight so the teeth line up is not crooked Push down with fingers until...

Page 24: ...or the moment Note if you have two units in a rack you may want to route the long ribbon cable underneath the unit in slot 2 for tidiness At this point line up the output transformer and cut legs to c...

Page 25: ...fit the PSU PCB Now we can screw on the back pack panel Note the small Ls for the back panel have an orientation Make sure they align to the top and bottom of the back panel the DON classics 2018 Pag...

Page 26: ...Back panel screwed on We can now screw in the other side panel with the pots PCB the DON classics 2018 Page 26 of 29...

Page 27: ...o plug in the 24VAC transformer and test the rails You should read 0V 24V and 48V If this is ok we can go ahead and turn on the mic pre itself Switch the power switch to 51X or internal PSU depending...

Page 28: ...to set it so that the sine wave squares off evenly on the top and the bottom at the initial point of clipping You can use the output pot at this point to raise and lower the level to see where the si...

Page 29: ...the transparent decal You will then place the transparent decal onto the switch cap and start to wipe out any bubbles with a cotton bud At this stage make sure it s on straight and then continue to wi...

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