Re: [time-nuts] Z3816 Oscillator Saga

2014-05-02 Thread Chris
On 05/01/14 08:51, Peter Schmelcher wrote: Chris, This hi res pic might help you. I modified my Z3816A to improve the performance. I changed the grounding and added a few extra capacitors. This pic is close to the start so very few changes. -Peter Peter, Thanks very much for sending that. The

Re: [time-nuts] Z3816 Oscillator Saga

2014-05-02 Thread GandalfG8
Hi Chris I've got some results to hand for three samples of the fluke.l MTI-260-0624-C oscillator, if that's the one you mean?, and for 5 MHz output they all require an EFC input on pin 1 between 2.8 and 3.1 Volts. That's with a 12 Volt supply on pin 5, which gives approx 6 Volts out on

Re: [time-nuts] Z3816 Oscillator Saga

2014-05-02 Thread Peter Schmelcher
Chris, The Z3816 has a few design short comings. In the circuit board pic the MTI oscillator circuit board grounding is improved. Subsequently I opened and modified the oven internally and added an extra oven feedthrough pin. The issue is the oven heater current modulates the ground pin

Re: [time-nuts] Z3816 Oscillator Saga

2014-04-30 Thread Jason Rabel
Chris, You will have to do a little google searching, or even contact MTI directly, but the suffixes in the part #'s can mean anything and without the correct spec sheet you have no idea what the EFC range is, or even the direction. There is no rhyme or reason to the suffix numbers (that I can

Re: [time-nuts] Z3816 Oscillator Saga

2014-04-30 Thread Tom Van Baak
Hi Chris, Ideally, I would like to find another Z3816, as this would provide a spare as well as visual id of damaged parts to allow repair, but haven't seen any for sale recently. Start with http://leapsecond.com/museum/z3816a/ Maybe also: http://leapsecond.com/museum/z3815a/ I have