WT
Interesting there are at least 3 total people now that have the 2201. All on
time-nuts.
I have been working on my 2201 with the help of another time-nut and home
brewed the antenna/downconverter. But the way I did it is really
not reproducible. Unless you have a 1600 MC very stable external
Interesting to read the comments of others who have these. I have one I got
years ago, gave up on. I knew it worked because I could see the 50 something
MHz inside moving around and then locking up. I finally found out how to
hook RS232 up to it and reset the frequency. It couldn't be set to
Hi all,
I have an Austron 2200 with antenna. I think is the same antenna used with
2201. Internally the converter is very simple to rebuilt with patient and time
to spend. From the mainframe you have DC power, a 10 MHz fx to be multiplied
for LO,and back the IF frequency. In the antenna
Luciano,
The 750 may be made up by the use of a pll and then doubled to 1500.
With the information I see they never went into any detail about the
converter.
Just maybe you have those details.
Regards
On Fri, Apr 8, 2011 at 11:08 AM, Paramithiotti, Luciano Paolo S
luciano.paramithio...@hp.com
Hi,
The multiplier is a classic analog harmonic distortion multiplier to avoid to
add phase noise with a PLL.
The mixer is a two diode harmonic mixer, I suppose they use to drive it with
1/2 LO frequency due the old semiconductor thecnology available at the moment.
I have the complete manual
From what I remember from my days at Austron, antenna had 10 Mhz LO and 75
MHz IF.
Rob K
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: 08 April 2011 5:04 PM
To: Discussion of precise time and frequency measurement
Rob you are correct but the 10 MC is a ref for the pll.
Luciano goes into more detail on the diode mixer/doubler and this makes
sense. It would be simple, but would not be very sensitive. So by feeding
the converter as he has with a modern antenna he gains a lot and most likely
a lower frontend
Correct, but again : no PLL is used due high phase noise introduced by it.
Monday I will be back home and I will take the manual. I can scan the schematic
for you
Luciano
Luciano P. S. Paramithiotti
IZ5JHJ
-Original Message-
From: time-nuts-boun...@febo.com
On 04/07/2011 09:44 AM, Joseph Gray wrote:
Does anyone know what happened to the forum at
http://realhamradio.com? It has been in maintenance mode for quite
some time. I know that the other web pages are still available, but
the forum had additional information and discussion. Even if no new
Interesting then it would be some form of linear multiplier chain. Thats
ugly for 750 Mhz.
75 X 10 or is it actually 1500 MC and its 10 X 50 X 3.
It will be interesting to see what math was used.
On Fri, Apr 8, 2011 at 1:44 PM, Paramithiotti, Luciano Paolo S
luciano.paramithio...@hp.com wrote:
I forget to comment on trimming the existing crystal's
frequencies: There is no adjustment provided in the 3586B for
netting the crystals. We tried adding adjustment capability, but
since the crystal frequency is divided down by a fair amount it would
take more adjustment than the actual
Magnus,
Thanks for the links. I did have those. I was just wondering about the
forums, because AFAIR not every bit of useful information mentioned in
the forums found its way to the static web pages. I'll shoot Bill an
email.
Joe Gray
W5JG
On Fri, Apr 8, 2011 at 1:10 PM, Magnus Danielson
http://www.army.mil/-news/2011/03/29/53988-picatinny-fields-first-precision-guided-mortars-to-troops-in-afghanistan/index.html
-John
=
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