<p>ELA Amplifier SQ40, Type LBB1304/01, manufactured by Philips in the mid 1980th,
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details see <a rel="nofollow" class="external text" href="http://hdl.handle.net/10013/epic.40165.d001">Manual</a> (pdf 3 MB)
Hannes Grobe
CC BY 3.0
<span class="int-own-work" lang="en">Own work</span>