Re: [time-nuts] Power connectors continued

Someone previously mentioned "aviation" style connectors (which many will recognize as mobile microphone connectors) (see graphic below). I switched to these for power and other connections long ago, and have been extremely happy with them. One nice thing about them (IMO) is that all chassis

Re: [time-nuts] Power connectors continued

I have a design rule that I've used for decades: "If it fits, it works, or it does no harm." -Original Message- Why so many connecter types? So you don't cross stuff up. ___ time-nuts mailing list -- time-nuts@febo.com To unsubscribe, go t

Re: [time-nuts] Power connectors continued

On 6/22/17 4:22 PM, William H. Fite wrote: A good friend of mine, sadly of blessed memory, was a lead engineer for Grumman on the comm systems of the lunar lander. He spoke of small space-rated multi-pin connectors that cost upward of $500 each. The Micro-D is widely used in spaceflight, and is

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

Hi Chris: Yes. Just looked on eBay and in under a minute found Item 231877388026. 11.1 V 6.6 AH with a label rate of 75C, but the eBay ad says 75C-150C. So it will produce between 495 and 990 Amps. The stock connector is the EC5, which is needed for this kind of current. It's the connector

Re: [time-nuts] Anderson PowerPole (was Charles Wenzel GPSDO)

You are correct about 9V batteries. A 10A short is about 90 Watts. But have you seen the specs on a LiPo Battery? I have a 18 volt nominal 8,000 mAH LiPo battery that is rated "40C". This battery is safe and within design limits to discharge at 40 x 8,000 mA. Yes, taking 320 amps out of the ba

Re: [time-nuts] Need advice regarding rubidium oscillator

Roman-- You'll find a lot of information on the care and feeding of rubidiums such as the LPRO-101 on the list, and referenced websites. A specific reference for the LPRO-101 is: http://www.ka7oei.com/10meg_rubidium1.html that page has links to a lo

Re: [time-nuts] Need advice regarding rubidium oscillator

Hi It’s an LPRO Rb. I’ve always gotten good stuff from that seller. Like any Rb, the phase noise and spurs are not good enough for most microwave applications. If you are into high dynamic range HF SDR, they will impact that as well. Bob > On Jun 23, 2017, at 4:47 AM, Roman wrote: > > Hi gro

[time-nuts] Need advice regarding rubidium oscillator

Hi group, Is it a good rubidium oscillator to buy? http://www.ebay.com/itm/292160126291 Thank you in advance for your opinion! Planned use - as reference source to my SDR radio (passive radar application). Regards, Roman ___ time-nuts mailing list -- ti

Re: [time-nuts] GPScon running on Raspberry Pi 3b

I've got a Pi3 here on my desk. I only see one UART that connects to GPIO pins. But it turns out if you actually need to use serial you use the USB to serial dongles. If you need four serial ports use four dongles. That is just the way the Pi3 is. You can level the 3.3 volt serial port but

Re: [time-nuts] Power connectors continued

Hi, Either that, or make protection schemes to save the day. If you can't come up with a protection scheme that works, then you need to move on to another connector. A crow-bar circuit and a diode for reverse-bias and a fuse could probably form sufficient protection. There is plenty of connec

Re: [time-nuts] Power connectors continued

I've been caught by that one. Someone used 240V IEC inlets as convenient 10A DC inputs to an oven in an ion trap. Fiddling around in the back of the racks, I made the inevitable mistake and Poof! there went $1000 worth of isotopically separated Yb 171. A few years later, someone else did the same