radiance
Well-known member
The schematic of the Lawo DV972/3 can be found on the Kubarth website (all hail to Kubi)
I just inserted the EQ part between the input tranny and the cap C1/C2.
The DV972/3 gives 30dB gain so it's more than enough. The input tranny is a 1:66/1 Haufe St 4934/2 (info also on the Kubarth site..).
I increased R7/R8 from 4,7K to 44K or so, and I removed C5/C6 for more bandwidth. I put it together and it works fine but maybe if someone more tegnical than me feels the urge to comment on this approach ....please do.
All switches are Grayhill rotary's wich I got for cheap from evilbay...
Ok, here the pics....
Edit: Running it unbalanced on the inserts (tip-ring sleeve) of a Allen @ Heat Mixwizzard mixer I got some nasty oscilation. It was solved by decreasing R7/R8 from 44K to 35K (maybe less). It was probabely an impedance missmatch or so. On the inserts of a Mackie 1402 VLZ mixer it caused no problems (those inserts where a mod. done by me ......so maybe that explains it )
I just inserted the EQ part between the input tranny and the cap C1/C2.
The DV972/3 gives 30dB gain so it's more than enough. The input tranny is a 1:66/1 Haufe St 4934/2 (info also on the Kubarth site..).
I increased R7/R8 from 4,7K to 44K or so, and I removed C5/C6 for more bandwidth. I put it together and it works fine but maybe if someone more tegnical than me feels the urge to comment on this approach ....please do.
All switches are Grayhill rotary's wich I got for cheap from evilbay...
Ok, here the pics....
Edit: Running it unbalanced on the inserts (tip-ring sleeve) of a Allen @ Heat Mixwizzard mixer I got some nasty oscilation. It was solved by decreasing R7/R8 from 44K to 35K (maybe less). It was probabely an impedance missmatch or so. On the inserts of a Mackie 1402 VLZ mixer it caused no problems (those inserts where a mod. done by me ......so maybe that explains it )