The advantage of the Leo Bodnar unit is that it can do a lot more than just act
as a fixed 10 MHz reference. It covers the range 450 Hz to 800 MHz, so has many
other uses around the shack.
I use mine for frequency locking the 116 MHz Local oscillator of an a G4DDK
Anglian 144 MHz transverter.
Two Christmases ago, my fiance asked me what I wanted for a gift. On a whim,
without too much study, I said a Bodnar GPSDO. I emailed Leo and inquired about
using the unit as a reference for my SDR-IQ (66. MHz) and a 10 MHz source
for my DG8SAQ network analyzer which can also operate as a
OK, so what was the "Item Number" on the bay? As I'm unable to find
that seller to see what exactly it was you purchased.
Or, what is the make/model number of it (if it's an ex commercial item,
such as a Thunderbolt.)
The devil is in the detail with these things.
73
Dave G0WBX
On 09/05/17 21
Thanks for bringing up phase noise. From my research on other cheap devices
(knockoff TCXOs), I have found that phase noise was obviously not
considered and in that case was truly awful. It was in the -115 dBc range
at 100hz, but, likely due to poor design, actually rose to -110 dBc at
10-100 kHz o
On 08/05/17 23:26, Jay Miller wrote:
> I was curious so I bought a GPS disciplined 10MHz source from China using
> the eBay seller "cybereveryday." I have a calibrated scope and a Rubidium
> 10MHz source. I noticed a frequency offset on three of the WWV frequencies
> when I plugged it into the K3
How did you measure the GPSDO? Against the Rubidium?
On 5/8/2017 3:26 PM, Jay Miller wrote:
I was curious so I bought a GPS disciplined 10MHz source from China using
the eBay seller "cybereveryday." I have a calibrated scope and a Rubidium
10MHz source. I noticed a frequency offset on three of
Mine is from G3RUH http://www.jrmiller.demon.co.uk/projects/ministd/frqstd.htm
he states: The stability as given by the Allan Deviation is typically 5x10-12
at τ=10s.
That figure is 0.05 Hz at 10 GHz and is a remarkably small value.
Using mine as a example I would say the one you have is way
Need to get that TMP cable (radio to Freq. Ctr) made and get back to the
project of determining exactly how close you can get on average without
an instrument(s).
Pretty sure I can get a lot closer than 25 Hz using my ear even my
old aviator's ear.
Glad I chose NOT to try the eBay/Chinese PCB
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