Re: [time-nuts] DTMD unit on ebay, Maser tests?

2019-04-22 Thread Jeff Kruth via time-nuts
The specs look good but what do I know. Wonder how this would be for our Maser tests? As good, worse or better than a TICC, or just different? John N8UR, you catch this? Any thoughts?RegardsJeff Kruth Hi,  A friend directed me to this listing. Nice looking DMTD unit.Low power and compact!Has

Re: [time-nuts] Neat looking DMTD unit on eBay

2019-04-22 Thread Bob kb8tq
Hi All of the divide by 2 stuff and the frequency counter on the input would make more sense with a DFF as a mixer. It also might explain the use of a 3V CMOS signal as the “standard input”. It may all be in an FPGA. One thing missing in the info - can the LO be tuned at all? If not, you

Re: [time-nuts] Neat looking DMTD unit on eBay

2019-04-22 Thread Bruce Griffiths
The mention of deglitching after the mixers perhaps indicates that the mixers may be flipflops and that the device is perhaps a DDMTD. Alternatively the block diagram is intentionally misleading. Bruce > On 23 April 2019 at 03:11 cdel...@juno.com wrote: > > > Hi, > > A friend directed me

Re: [time-nuts] Z3801 Power Supply Schematic?

2019-04-22 Thread ed breya
Hi Dave, I would appreciate the Z3801A schematic too, if possible. I recall looking for any schematics for this unit years ago, and found some info about various aspects, but not a complete PS schematic. That would be great if one exists now. Ed

[time-nuts] Neat looking DMTD unit on eBay

2019-04-22 Thread cdelect
Hi, A friend directed me to this listing. Nice looking DMTD unit. Low power and compact! Has anyone played with one of these yet? https://www.ebay.ca/itm/123728915157?ul_noapp=true Cheers, Corby ___ time-nuts mailing list --

Re: [time-nuts] Z3801 Power Supply Schematic?

2019-04-22 Thread Artek Manuals
Well I thought I was sending it off group 8^) Anyway my personal experience is that that schematic matched my 3801 pretty close Dave On 4/21/2019 9:19 PM, Artek Manuals wrote: Richard somebody (on this group?� .. five or more years ago?) reverse engineered the DC to DC power