[BUILD] 1176 Rev A - Back to the beginning...

[Brian Roth]

I am still confused. The primary (or secondary for that matter) doesn't have an inherent impedance.

For example, a 1:1 transformer with a 600 Ohms load on the secondary "reflects" 600 Ohms to the primary. A 60 Ohm secondary load will "reflect" 60 Ohms back to the primary. Thus, the amp driving the xfmr "sees" a load which is directly affected by the secondary load.

Or, does that particular xfmr have multiple secondary taps that you are selecting?

Bri

 

[Ilya]

It would be better to load the output not heavier than 600R and get the needed level with a voltage divider.

As for resistors valves, always check with the original schematic. IIRC sidechain is identical in rev A/B and D. Meter driver is different though. Frankly, I would’ve left meter driver circuit from later revisions because it’s much simpler.