If you can touch the heat sink for 2 seconds, you're made of sterner stuff than I am! They run very hot. It's a good idea to get a GPIB extender so your GPIB cable can clear the heat sink. Somebody, can't remember who, worked up a nice looking conversion to a pair of switching supplies. I bought a couple of the supplies from ebay, but that project hasn't shuffled to the top of the list, yet. Maybe the next time I forget and reach back there and get burned...
Bob From: Dr. David Kirkby - Kirkby Microwave Ltd <drkir...@kirkbymicrowave.co.uk> To: Discussion of precise time and frequency measurement <time-nuts@febo.com> Sent: Friday, December 30, 2016 5:58 PM Subject: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter? I bought a 5370B TI counter which arrived today. It needs a bit of TLC, but nothing too bad. But one of the rotary knobs is incomplete. Does anyone have a spare knob? Contact me off list if you do. I had one of these things about 10 years ago. I have forgotten how to drive it. It is running very warm. I can hold my fingers on the heatsink for only a couple of seconds - not a very scientific test I must admit. Obviously the mains voltage varies a bit, but it is usually well over the 230 VAC we are supposed to be. I just measured it at 248 VAC. Unfortunately I'm right on top of the 11 kV transformer, so other properties around me probably get poorer voltage regulation, but a few less volts. Dave -- Dr. David Kirkby Ph.D CEng MIET Kirkby Microwave Ltd Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT, UK. Registered in England and Wales, company number 08914892. http://www.kirkbymicrowave.co.uk/ Tel: 07910 441670 / +44 7910 441670 (0900 to 2100 GMT only please) _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there. _______________________________________________ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.