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  1. setting input attenuators

    Smiles ear to ear and says yes. Thank you much Chris.
  2. setting input attenuators

    Input attenuators are not a device to set total amp output righto you are. They do however play heavily in gain stucture. If you are setting up a system with a DSP and using a specific box tuning, things need to be right or the tuning is useless. In this case you may need to adjust the attenuators to gain stage the amps to one another for the tunings to work. For a minute lets say I have gain matched 3 amps all with different voltage gains via a set sine wave input and a meter or scope. I'll be using the attenuators to do this. I'd be lowering the highest gain to match the lowest with the attenuators. Ok now I've done that. Now clip points would be right out the window?? So once again where would you set the attenuators. Now where to set the limiters without letting the smoke out of the boxes when you have double the power into them. I think that may have just occured to me 2 times rated power would be 3 db over the rated power dail in the limiter for -3dbu no? That sounds to simple. Thats what I'm looking at I've never used a specific tuning for a specfic box before.
  3. setting input attenuators

    At least one manufacter specs 1.5 to 2xs rated power for their cabs. I also have wondered about this. I would think limiting would get the job done, but how would you determine where to limit. And as stated above where would you set attenuators.
  4. I'm working on an old microtech 1200 serial number 126990. Could I ask for a schematic for this unit. More importantly for early mainboard number D6304A4. I have some literature I brought some years ago but this board isn't covered. There are some issues on the mainboard I need to resolve. I think this is back before the macrotechs came into being. Thankx
  5. Ma 3600 issue

    Myself I'd follow up on it, but I have the capability to repair my own. If you can do the same I'd try to guesstimate what the problemis. If you can't make a good guess at its problem forget it. Cost is another factor if its dirt cheap its not such a big risk. I've found that parts costs to repair an output problem where an output trans has flown the coup can add up to around 1 hundred dollars per channel. You could also get a couple of estimates for repairs that might weight in your purchase or not.
  6. Input routing

    Thanks for the info. If I could lose a few cables all the better, but I guess strike one for that idea. I never really looked very close at the routing in the amp. Nope minds not numb yet, that was just about the right amount of info and makes perfect sense. How much do CH1 /Ch2 share in bridge mono mode.
  7. Input routing

    I'm just pondering an idea here. If you put a microtech or macrotech amp into bridge mono mode your sending a 180 degree signal to channel number two with respect to number one. Now what I'm wandering is when the same amp is in Parallel Mono mode is the same signal phase wise being sent to both Ch1 and Ch2. Now to my thinking, if parallel mono mode sends the same signal to both? Is it possible to wire the outputs for stereo operation rather than parallel mono mode. The inputs would still be in parallel mode though. I want the same signal at both outputs L/R and thought this might be one way to do it.