UK Vintage Radio Repair and Restoration Discussion Forum - View Single Post - HP 8552A / 8554L Spectrum Analyzer help request

factory · 15th Dec 2020, 9:53 am

Ah 140S, I should have guessed with it having the earlier 8554L plug-in, I may have the manual for the 140S, as I fitted the CRT from one to a standard 140A.
Have a look at the later 140A oscilloscope mainframe manual (probably the one that mostly uses silicon transistors), the 140S mainframe is a modification of that with the P7 CRT with spectrum analyzer graticule, the only electrical difference I noticed was one less connection to the CRT.
But from what you've checked it sounds as if the PSU in the mainframe is working.

David

15th Dec 2020, 9:53 am	#8
factory Octode Join Date: Jul 2009 Location: Cheshire, UK. Posts: 1,738	Re: HP 8552A / 8554L Spectrum Analyzer help request Ah 140S, I should have guessed with it having the earlier 8554L plug-in, I may have the manual for the 140S, as I fitted the CRT from one to a standard 140A. Have a look at the later 140A oscilloscope mainframe manual (probably the one that mostly uses silicon transistors), the 140S mainframe is a modification of that with the P7 CRT with spectrum analyzer graticule, the only electrical difference I noticed was one less connection to the CRT. But from what you've checked it sounds as if the PSU in the mainframe is working. David