[Amps] GM3SEK Tetrode and Triode Boards - updates
w9ac at arrl.net
Wed Jul 5 08:42:36 EDT 2017
>"The uA748 op-amp IC used in the screen regulator is becoming obsolete and
there is no direct replacement."
Is that due to the 748's +30V input spec as a comparator? Tayda Electronics
presently have an inventory of 127K devices for USD $1.00 ea.
Tayda claims theirs are authentic National Semiconductor devices, but I
wouldn't bet on it. I don't normally source semiconductors from on-line
Asian suppliers, but a 748 is probably fine.
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