Hewlett Packard 203A Variable Phase Signal Generator - UK Vintage Radio Repair and Restoration Discussion Forum

jamescz121 · 9th Dec 2016, 6:18 pm

Basically I am need of some expertise to help diagnose and restore my HP 203A to working order. I bought this item to help test out my IRD balancing instrumentation and then calibrate it but it has been a while since I last used it and when I got it up and going recently, to see how it was fairing, there were some problems with the signal output according to my oscilloscope. It was always a little tweaky on the variable phase but generally settled down enough for calibration purposes. I have an original manual but needless to say lack the electronics expertise to know how to go about the full diagnostics procedure and equally what can be done if there are any failing components. I'm not afraid to have a go but some guidance is needed or there may be someone out there who has dealt with restoring one of these units. Any ideas gratefully received.

karesz* · 10th Dec 2016, 10:04 pm

James,
Here is some discussing over hes functioning...
Than some actual discussion over a distortion "case" - repairing
Regards karl

9th Dec 2016, 6:18 pm	#1
jamescz121 Retired Dormant Member Join Date: Dec 2016 Location: Farnham, Surrey, UK. Posts: 1	Hewlett Packard 203A Variable Phase Signal Generator Basically I am need of some expertise to help diagnose and restore my HP 203A to working order. I bought this item to help test out my IRD balancing instrumentation and then calibrate it but it has been a while since I last used it and when I got it up and going recently, to see how it was fairing, there were some problems with the signal output according to my oscilloscope. It was always a little tweaky on the variable phase but generally settled down enough for calibration purposes. I have an original manual but needless to say lack the electronics expertise to know how to go about the full diagnostics procedure and equally what can be done if there are any failing components. I'm not afraid to have a go but some guidance is needed or there may be someone out there who has dealt with restoring one of these units. Any ideas gratefully received.

10th Dec 2016, 10:04 pm	#2
karesz* Heptode Join Date: Jun 2010 Location: Zurich, Switzerland Posts: 538	Re: Hewlett Packard 203A Variable Phase Signal Generator James, Here is some discussing over hes functioning... Than some actual discussion over a distortion "case" - repairing Regards karl Last edited by karesz; 10th Dec 2016 at 10:10 pm.*