HP HP-Bench-Briefs-1965-04-05 free download

File name HP-Bench-Briefs-1965-04-05.pdf

HP Archive This vintage Hewlett Packard document was preserved and distributed by www. hparchive.com Please visit us on the web ! On-line curator: Glenn Robb This document is for FREE distribution only! HEWLETT ~ PACKARD April - May 1965 Vol. 6 No.1 HP MODEL 21lA SQUARE-WAVE GENERATOR Here's a handy circuit you can construct to reverse the polarity of the 2HA. The values of C and R in the circuit shown below are typical and will give fairly good waveform from approximately I KC to 1 MC. Vary the vallfes for better waveforms at specific frequencies. SERVICE TIPS AND ffiNTS cR HP MODEL P486A THERMISTOR MOUNT Serials above 1408 The P486A has jOined ranks with the adjUstables: Like FROM 21lA the HP Model 478A Thermistor Mounts, P486A's now coming oU the assembly line (units with serials above 1408, to be exact) have a compensating screw installed. This means you can thermally rebalance the mount if C