On Tuesday 7 November 2017, John Graham delivered his exceptionally learned talk on Surplus Test Equipment for the Amateur Laboratory. Below are a list of relevant links:
Yahoo groups:
http://groups.yahoo.com/group/hp_agilent_equipment
http://groups.yahoo.com/group/marconi_test_instruments
http://groups.yahoo.com/group/Rohde_Schwarz
http://groups.yahoo.com/group/WG-Fans
http://groups.yahoo.com/group/siemens_messtechnik
Sources of pdf manuals
http://www.ko4bb.com/getsimple/index.php?id=manuals
http://www.electronicsandbooks.com/eab2/manual/index.php?dir=Hardware%2F
http://www.ebaman.com/index.php/remository/ELECTRONICS/Test-Equipment/
http://www.keysight.com/main/facet.jspx?t=79841.g.1&cc=GB&lc=eng&sm=g
http://w140.com/tekwiki/wiki/Main_Page
http://docmesure.free.fr/telecharger.php?dir=Tektronix/Serie%207000/
http://www.hakanh.com/dl/kits.htm
https://sites.google.com/site/marconiinstrumentslimited/home
http://www.radioscanner.ru/files/rohde-schwarz/
PDFs for sale: Artek, Mauritron, etc
Other links
https://vk8bn.me/info/measuring-complex-impedances-using-thehp8405a-vector-voltmeter/
Farson, AB4OJ: Noise Power Ratio (NPR) Testing of HF Receivers: www.ab4oj.com/test/docs/npr_test.pdf
Verbana, I2VGO: Measurement of all products intermodulation on HF receivers: www.ab4oj.com/test/docs/test_npr.pdf
KE5FX GPIB Toolkit: http://www.ke5fx.com/gpib/readme.htm