Richard: The rabbit hole goes even deeper. Take a look at YouTube, where I found about 40 videos involving various versions of the 8753. You mentioned that the one you have has “hard to push keys.” Perhaps this video will embolden you to have a look inside:
https://www.youtube.com/watch?v=-Jx2pcWIHXA Also, here’s a video about HP sticky buttons (but on a frequency counter, but maybe that’s close enough): https://www.youtube.com/watch?v=Ahxx9wWEdqU Finally, you might start searching YouTube & eBay for an 8753B front panel assembly. All else failing, consider having a laptop talk to your instrument through its IEEE-488 port; you can usually control most every front-panel function through the port. I have some HP virtual instrument BASIC code examples that I can give you. Good Luck! Ed Price WB6WSN Chula Vista, CA USA From: Richard Marshall [mailto:richard.marshal...@btinternet.com] Sent: Tuesday, June 11, 2019 2:16 AM To: Ken Javor; EMC-PSTC@listserv.ieee.org; Edward Price Subject: Re[2]: [PSES] HP 8753B Vector Network Analyser Thank you both. You gave me the confidence to make a low offer to the Israeli vendor - and to my surprise it was accepted ! The VNA has now been delivered here in the UK safely. So far it seems to behave exactly as described on EBAY - including the push-buttons that need to be pressed hard - but with the surprise bonus of a bright and sharp display. Thanks again Richard Richard Marshall Laboratories, 30 Ox Lane, Harpenden, Herts., AL5 4HE, UK +44 (0)1582 460815 www.design-emc.co.uk<http://www.design-emc.co.uk> Member of the EMC Industry Association ------ Original Message ------ From: "Ken Javor" <ken.ja...@emccompliance.com<mailto:ken.ja...@emccompliance.com>> To: EMC-PSTC@listserv.ieee.org<mailto:EMC-PSTC@listserv.ieee.org> Sent: 23/05/2019 17:31:26 Subject: Re: [PSES] HP 8753B Vector Network Analyser That’s where I got mine... Ken Javor Phone: (256) 650-5261 ________________________________ From: Edward Price <e...@jwjelp.com<mailto:e...@jwjelp.com>> Reply-To: Edward Price <e...@jwjelp.com<mailto:e...@jwjelp.com>> Date: Thu, 23 May 2019 14:38:13 +0000 To: <EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG>> Conversation: [PSES] HP 8753B Vector Network Analyser Subject: Re: [PSES] HP 8753B Vector Network Analyser Richard: Take a look at eBay. I see about 20 used 8753B’s, with one in Israel for about $1100. Ed Price WB6WSN Chula Vista, CA USA From: Richard Marshall [mailto:00000aeebd4dc3f4-dmarc-requ...@ieee.org] Sent: Thursday, May 23, 2019 3:37 AM To: EMC-PSTC@LISTSERV.IEEE.ORG<mailto:EMC-PSTC@LISTSERV.IEEE.ORG> Subject: [PSES] HP 8753B Vector Network Analyser Hi All, I have damaged the "rf output" circuitry of my Vintage HP 8753B Vector Network Analyser, I think by ESD. Now I must scrap the much-loved instrument - manufacturedJune 1988 -unless I can acquire a replacement A3 source module. But these are now rare! Does anyone have an abandoned HP8753B - this is the early version with only a mono vector-format display - that could provide me with a replacement source module? I could drive to collect a complete Instrument from within the UK, or provide dis-assembly instructions and pay shipment cost of an A3 module world-wide. Please check in forgotten corners! Cheers, Richard Marshall G3SBA Richard Marshall Laboratories, 30 Ox Lane, Harpenden, Herts., AL5 4HE, UK +44 (0)1582 460815 www.design-emc.co.uk <http://www.design-emc.co.uk><http://www.design-emc.co.uk> Member of the EMC Industry Association <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient><http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> Virus-free. www.avg.com <http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient><http://www.avg.com/email-signature?utm_medium=email&utm_source=link&utm_campaign=sig-email&utm_content=emailclient> - ---------------------------------------------------------------- This message is from the IEEE Product Safety Engineering Society emc-pstc discussion list. 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