If any one has a tube of MC678P's they would like to part with, the company would be most willing to buy them..
We need them to keep an original, first one every made, irradiation unit operating to its closes original state.
Recently I was informed that they have been having some issues with arcing in the vessel or some where, and they have almost depleted the stock of replacement hex inverter chips. This is on a board that is part of the interlock and voltage monitor and drives reed relays, which in turn, drives larger relays.
Looking around I find the chinese market are more than willing to sell us some. But our finance department really does not want to go this route if possible, we would rather buy from a US supplier or just some left over stock some one wants to unload.
In any case, we rather not use NTE.. We want MC678P marked parts.
I've already got a daughter board in the works, that will use some bipolars and will plug directly into the 16 pin dip socket, if it comes down to that.
Thanks.
Jamie