>
>All Hail...!! Oh Enlightened ones...!!
>
> A friend of mine has an old SB220... The 3-500s have departed for
>Valhalla, but we have a number of 4-400As...(allegedly) good pulls.
> If we use the 4-400s instead of 3-500s (both grids grounded), what, if
>any, circuit changes should be made to cope with the new scenario???
> Any suggestions gratefully received..
In my SB-220, the ZSAC with 4-400s was a bit low with the stock 2900v.
3500v would have been better. Adding a c. 200v transformer to the hv
transformer sec. should have fixed the problem. There is plenty of room.
cheers. John
- Rich..., 805.386.3734, www.vcnet.com/measures.
end
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