Amphenol B6252HB-NPP3G-50

Merged #1144 into master.

Bayonet Neill–Concelman

IDT 5PB1108PGxx

This is the logic-buffer used for 1PPS in my pulse-distribution amplifier and the PICDIV2 board.

Merged #1232 into master.

OCXO Connor-Winfield OH300

Merged #1112 into master.


LMH6609MA and LMH6702MA

Opamps, in SOIC-8

Merged #1233 into master.

Compact frequency distribution amplifier

Stefan DK3SB, sent me this picture of his version of my frequency distribution amplifier. He modified the PCB to make it narrower (160mm), to fit a  Hammond
enclosure (about 25 euros from Farnell).

Nice work! KiCad sources and gebers hopefully to follow, on

KiCad footprint: Molex 73251-2200

Merged #1116 into master.

19" rack-mount for 7" R-Pi screen

An old drawing from the archives, which we hereby archive here. Drawn with Schaeffer front panel designer. Requires a further PCB-bracket that attaches to the 230x100 M3 holes and has screws that reach the back of the 7" LCD module.

Distribution Amp - S/N 16

Update2: Here's the 14-hour data together with a 14-hour noise-floor run. The ADEV and TDEV results are more or less instrument-limited. Only for phase-noise above 100Hz offset is the instrument floor significantly below the result for the distribution amplifier.

Update: Here's a 14 hour run of the residual phase noise, ADEV, and TDEV, as measured through the frequency distribution amplifier. Instrument is a Microsemi 3120A phase-meter.

Aivon has now produced around 16 of these distribution amplifiers.

There's a new op-amp which might be interesting to try for the FDA board: THS3491. It has a grounded pad under the op-amp, so we need a new EP-variant of the PCB.

KiCad symbols and footprints

Update: Molex R/A 'long-neck' SMA-connector:

Silkscreen only on board, F.fab drawing shows off-board threaded part.

I sumbitted a few pull-requests to the KiCad libraries with some parts used on recent boards. Let's see if/when they make it into the main/released libraries...

On the to-do list is to submit an SFP-connector and Cage footprint... (unless someone has already done that?).

Rabbit @ NIKHEF

Learning about WR absolute calibration at NIKHEF, Amsterdam.

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