Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

On 30 December 2016 at 23:58, Dr. David Kirkby - Kirkby Microwave Ltd < drkir...@kirkbymicrowave.co.uk> wrote: > 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

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

On 2 January 2017 at 18:21, Robert Atkinson wrote: > I've a spare knob and it's on it's way to Dave. f > Cheers Robert. I'll send you some money. Drop me a private email with your PayPal address. > 5370 counters do seem to run hot so I don't think you have a fault. As

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

David, You're a volt-nut too, aren't you ? Maybe motorise the variac and keep your lab at 240V +/- almost-nothing ? On Sat, Dec 31, 2016 at 7:57 PM, Tom Miller wrote: > > - Original Message - From: "Dr. David Kirkby (Kirkby Microwave > Ltd)"

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

- Original Message - From: "Dr. David Kirkby (Kirkby Microwave Ltd)" To: "Discussion of precise time and frequency measurement" Sent: Saturday, December 31, 2016 11:01 AM Subject: Re: [time-nuts] Anyone (ideally in the UK) got a

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

On 31 December 2016 at 13:03, EB4APL wrote: > Hi, > > I'm not totally sure about the limits, but I have read several times that > in the UK the nominal supply voltage is 230 V +10%/−6% to accommodate the > fact that most supplies are in fact still 240 V. The context was that a

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

Hi, I'm not totally sure about the limits, but I have read several times that in the UK the nominal supply voltage is 230 V +10%/−6% to accommodate the fact that most supplies are in fact still 240 V. The context was that a lot of test equipment failed when operated at around 250 V and many

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

230VAC +10% -6%, so 253 is the upper limit. 248V is not unusual as for historic reasons some parts of UK still actually supply 250V ... When we "harmonized" our mains with the EU, we changed the specification from 240V +/- 5% (I think) and didn't actually change any equipment. Happy New Year

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

On 31 Dec 2016 02:03, "Bob Stewart" wrote: > > 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

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

You could try hooking up a transformer with a 20V secondary as an autotransformer to reduce the line voltage. On Fri, Dec 30, 2016, 9:09 PM Bob Stewart wrote: > 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

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

A knob? Sounds like a good use for a 3D printer. ___ 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.

Re: [time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

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

[time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

I forgot to mention... I still have some 3-board extender card kits for the 5370's. Two boards are used to extend one of the main cards. The other fits the front panel board (and one of the other minor boards in the machine). Contact me off list if needed...

[time-nuts] Anyone (ideally in the UK) got a spare rotary knob for the 5370B TI counter?

I don't have a knob, but something that fits should be easy to find. One warning... some of the pots have plastic shafts that can be brittle. They can shear off either due to accident, turning too hard against the stops, or just old age. I seem to remember that one of them has a switch on

[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