abrsvc wrote in message
...
On Sep 12, 10:36 am, "N_Cook" wrote:
TI IC marked SN99661 and 70400604 and 604 on the schematic
A number of people (out there) enquiring about work-around of replacement
with 4016 or 4066 but no reports found of reported success.

The effects out one here, at first sight is doubled up of the 2 analogue
switches, but as c/o type only one used when it somes to it. 4066 sw about
4x Ron of a TL064 so that should be ok for all 4 paralleled for this PREA
output switching function. No problem finding space. I happen to have a
salvaged TL064 but will keep that for a rainy day. Anyone been here before
and can report success. Or a simple FET work around instead.

See the link below that has both a crossreference PDF for Peavey
parts, but also a PDF for the replacement of the TL604 part with a
small PC board.

Dan

Link: http://music-electronics-forum.com/t22020/


+++++


That adaptor would work as used in this amp , as single pole change over but
not generally for the 604 with 2 separate SPST alternately active as no
inverter in that package. One of the other unused 2 in the DG211 and a
resistor could perhaps be made to invert one of the control lines.