= BH55 =
== Modification history ==
 * The Dark Ages (probably it was [[https://wiki-40m.ligo.caltech.edu/Electronics/RFPD/POP55|POP55]]); SN117
 * Replaced R13 from 100 kOhms to 309 Ohms (by Paco on May 24, 2023)

== Characteristics ==
 * DC output / transimpedance: ~50 V/A (R22*(1+R13/R23)=12.6*(1+309.5/102.7)=50.6)