On Thu, 8 Nov 2018 at 21:43, Dr. David Kirkby < [email protected]> wrote:
> On Thu, 8 Nov 2018, 14:53 George Atkinson via time-nuts < > [email protected] wrote: > >> Last month I was at the UK “National” hamfest and in the flea market area >> a seller had a HP 58503B for sale. It was missing the cover and power >> supply (AC mains version)including mounting. However it was only £3 (<5$) >> so it was a no-brainer to buy it. Research shows that PSU failure is fairly >> common on these units. >> > > I had the PSU fail in my 58503A. It keeps trying to start, then stops. I > have checked capacitors with an ESR meter, but could not fix it. > > Three is a good chance your unit takes the same PSU. If so > > > https://www.ebay.co.uk/itm/BEL-POWER-MAP55-4003-55W-Quad-Output-Embedded-Switch-Mode-Power-Supply-SMPS/132833037734 > > may be of interest. I had an offer of £45 accepted yesterday. > > Dave. > >> Well, the bad news is the PSU I received was faulty (no output whatsoever), and the seller has checked another, and that too is dead, so it looks like he has rejects. He has refunded me and does not want the one he sent back. So now I have two non-working supplies. The new one does not power up at all. The old one does, but cycles on/off. -- Dr David Kirkby Ph.D C.Eng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, CHELMSFORD, Essex, CM3 6DT, United Kingdom. Registered in England and Wales as company number 08914892 https://www.kirkbymicrowave.co.uk/ Tel 01621-680100 / +44 1621-680100 _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to http://lists.febo.com/mailman/listinfo/time-nuts_lists.febo.com and follow the instructions there.
