340mA seems really high - all the ones I've seen take about 90mA - and I would strongly recommend putting in on a heatsink, or at least bolting it directly to the chassis. In my experience, they don't actually malfunction when operated without one, but the housing gets very hot (and, presumably, the insides get hotter still) - after 24h running sitting on a foam mouse mat open to the air, the case hit about 59c - I can't help thinking that isn't going to be good for the long-term health of the unit.
Regards, Pete On Wed, Dec 21, 2011 at 12:03 AM, Chuck Forsberg WA7KGX N2469R <[email protected]> wrote: > Mine requires the 5 volt supply at 340 ma. > > Are there nay manufacturer's instructions about mounting, ventilating, > or heat sinking these units? > > My current thinking is to mount it on standoffs on the back of the chassis > that houses my Thunderbolt. > > Perhaps I should place it where it can warm up Princess. > (Notice the magnet on top of the oscillator.) > > > On 12/20/2011 07:13 AM, Roy Phillips wrote: >> >> >> >> -------------------------------------------------- >> From: "Rex" <[email protected]> >> Sent: Tuesday, December 20, 2011 1:10 PM >> To: "Discussion of precise time and frequency measurement" >> <[email protected]> >> Subject: Re: [time-nuts] Ebay FE-5680A Rb I see the price has gone up for >> these >> >>> FWIW. I just hapened on this power supply in an ad. You might find a >>> fixed voltage one somewhere cheaper, but the price seemed ok, so here it is >>> for consideration... >>> http://www.mpja.com/email/12-13-11.asp?r=284759&s=2 >>> >>> Still need the 5 V somehow, so not a complete solution for the 5680A. >>> >>> >>> On 12/19/2011 3:06 PM, [email protected] wrote: >>>> >>>> In a message dated 19/12/2011 22:27:22 GMT Standard Time, [email protected] >>>> writes: >>>> >>>> This thing requires plenty of current to get started. >>>> My Tek CPS250 1.2 amp output (A+B parallel) only gets 7.5 volts. >>>> Now to scrounge something a bit bigger. >>>> --------------------- >>>> The 15 volts to pin 1 starts off needing to supply around 1.7 Amps, >>>> eventually falling to somewhere between 700 and 800 mA. >>>> >>>> Pin 4 always draws around 85 to 90 mA from its 5 volt supply. >>>> >>>> regards >>>> >>>> Nigel >>>> GM8PZR >>>> >>> >>> Nigel >> >> I trust that you are aware that some models of the FE-5680A only require >> the 15 volt/1.7Amp. supply. In fact connecting a 5 volt supply to the >> units that are programmable can cause damage ! >> Roy >> >>> _______________________________________________ >>> time-nuts mailing list -- [email protected] >>> To unsubscribe, go to >>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >>> and follow the instructions there. >>> >> >> >> _______________________________________________ >> time-nuts mailing list -- [email protected] >> To unsubscribe, go to >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts >> and follow the instructions there. >> > > -- > Chuck Forsberg WA7KGX N2469R [email protected] www.omen.com > Developer of Industrial ZMODEM(Tm) for Embedded Applications > Omen Technology Inc "The High Reliability Software" > 10255 NW Old Cornelius Pass Portland OR 97231 503-614-0430 > > > _______________________________________________ > time-nuts mailing list -- [email protected] > To unsubscribe, go to > https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts > and follow the instructions there. _______________________________________________ time-nuts mailing list -- [email protected] To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts and follow the instructions there.
