Hewlett Packard 524A Counter


I am looking for a service manual/schematic to add in restoring this unit.

A link tot he HP memory project Frequency counter page: http://hpmemoryproject.org/wa_pages/wall_a_page_11.htm

 

A pratical small lab bench frequency counter:

HP 524A counter on Truck

 

HP 524A Counter Panel Label

HP 524A Counter Panel Label

 

HP 524A Counter Two lowest Digits are done with Meters

HP 524A Counter Two lowest Digits are done with Meters

HP 524A Counter Back side Open:

HP 524A Counter Back side Open:

 

HP 524A Counter Tube Layout:

HP 524A Counter Tube Layout

 

HP 524A Counter Tubes

HP 524A Counter Tubes

 

HP 524A Tube layout:

HP 524A Counter Serial Number

 

HP 524A Frequency Reference:

HP 524A Counter Frequency Reference

 

HP 524A Transformer or inductor?:

HP 524A Transformer

 

 

HP 524A Counter Circuit Strips:

HP 524A Counter Circuit Strips

HP 524A Counter Power Supply:

HP 524A Counter Power Supply

 

HP 524A Counter Middle Section:

HP 524A Counter Middle Section

 

HP 524A Counter Bottom Section:

HP 524A Counter Bottom Section

 

HP 524A Counter Top

HP 524A Counter Top

 

HP 524A Counter Temp Gage

HP 524A Counter Temp Gage