From Paul Schreiber Sent Sun, Aug 13th 2006, 16:45
From Paul Schreiber Sent Sun, Aug 13th 2006, 16:45
>I understood you to mean (in reply to original poster's question) that only the >1485 was identical in circuitry to its MOTM format counterpart -- I was just >asking about the others in the 1000 series. I take it you mean that all the FR >format modules are identical to the MOTM format, which is very cool indeed. > The circuitry is always the same. All that is "done" is to re-lay out the pc board for SMT components and the new style of pots that I use (same as Doepfer). For critical things like VCF filter caps, I use the original through-hole parts. The Tempco resistors are also still through-hole. The ICs and resistors moving to SMT is mostly what is involved. Rest assured, the IC die in the SMT package is the same die in the through-hole. One can also argue that SMT designs have the ability to be 'better' than through hole because the parts are closer together, which makes the traces 'tighter' (less noise and hum pickup). The stray inductance is about 50X lower for SMT (mostly a factor at speeds in the digital area). The physics/chemistry use in building presicion resistors is actually better for SMT than through-hole (an important factor in the design of the MOTM-650 MIDI-CV converter, which uses over 30 0.05% tantalum nitride film resistors). > Are there any plans for a 1420? > Not yet. There are plans for a MOTM-1440, though. Paul S.