I have seen similar issues to Dana's and have told myself it must be torque
left in the gear-train within the pot. Maybe all in my mind as well, but it
seems real to me on some equipment.
-Brian, WA1ZMS
> On Dec 24, 2017, at 5:26 PM, Dana Whitlow wrote:
>
> I think I need to
I have noticed, of late, several used 80MHz OCXOs for sale. Is there a
particular industry that uses 80MHz as a typical reference freq?
I'm sure there's a reason why it is 80 vs. 100 or 10 or 5.. I just don't
know what it is.
-Brian
___
time-nut
FWIW.We're at an 11 yr low for solar activity. Thus no big suprise that
25MHz is not covering the US very well, but a rare opening is always possible.
-Brian
> On Jul 16, 2017, at 7:32 PM, paul swed wrote:
>
> Not hearing wwv on 25 MHz but 15 is fine. Using a beam and r1051 receiver.
> Mayb
https://www.nist.gov/pml/time-and-frequency-division/time-services/wwv-broadcast-outages
-Brian, WA1ZMS
iPhone
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I know this sounds "insane", but could the unit have been on the wrong Cs peak
for some time now?
-Brian, WA1ZMS
iPhone
> On Aug 22, 2016, at 3:02 PM, Pete Lancashire wrote:
>
> I fired up my old 5061A about 3-4 times a year to keep the tube pumped
> down. I usually r
The FS710 has been sold.
-Brian, WA1ZMS
iPhone
> On Sep 27, 2015, at 2:19 PM, "Brian, WA1ZMS" wrote:
>
> Hi all-
>
> Time to clean out some extra items.
>
> I have one SRS FS710. Tested & works. Time-nuts price $150 + shipping to US
> address.
>
Both HP5087's have been sold.
-Brian, WA1ZMS
iPhone
> On Sep 27, 2015, at 2:19 PM, "Brian, WA1ZMS" wrote:
>
> Hi all-
>
> Time to clean out some extra items.
>
> I have one SRS FS710. Tested & works. Time-nuts price $150 + shipping to US
> address
Contact *off-list* if interested.
Thanks,
-Brian, WA1ZMS
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The crystal in the ref osv. came from Bliley. The part number is BG-61. I have
no idea what the current cost is, but like most very good oscillators the
crystals were hand sorted and graded.
-Brian, WA1ZMS
iPhone
> On Jul 16, 2015, at 11:17 AM, "John Stuart" wrote:
&g
se shift network to keep it all temp stable.
Personally, I'm lazy and like the Wenzel "full wave rectifier" design with
a nice BPF on the output to obtain a clean 10MHz.
-Brian, WA1ZMS/4
-Original Message-
From: time-nuts [mailto:time-nuts-boun...@febo.com] On Behalf Of Oz
and not be needed.
-Brian, WA1ZMS/4
iPhone
> On Aug 18, 2014, at 12:53 PM, Joe Leikhim wrote:
>
> Is anyone paying attention to all the chatter about the lost aircraft MH370,
> Inmarsat's supposed flight tracks based on 6 or 7 pings (1 per hour), the
> Doppler shift (BFO) an
So does anyone know what frequency stability NAA has as of today?
When I fire-up my VLF RX converter they are so loud I'd hate to live near
the site.
One might be able to hear it with silver fillings in their teeth while
eating a lemon! ;- )
-Brian, W
ormance!
My 2 cents in the RF/Telecom World.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of paul swed
Sent: Monday, July 28, 2014 8:17 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts]
Boy you are spot on about what "damage" sales guys can do.
The original OCXO spec is x10 better than the 16Hz I get with the DAC at the
limit.
Thanks.
-Brian, WA1ZMS/4
iPhone
> On May 26, 2014, at 6:25 PM, Bob Camp wrote:
>
> Hi
>
>
>> On May 26, 2014, a
ite a change in PTI product lines after MTron bought them.
-Brian, WA1ZMS/4
iPhone
> On May 26, 2014, at 5:15 PM, Bob Camp wrote:
>
> Hi
>
>> On May 26, 2014, at 4:31 PM, Brian, WA1ZMS wrote:
>>
>> I am trying to repair my HP-8920 RF Com test set since its inte
a replacement OCXO or already been
done this path before? I hate to re-invent the wheel.
I can buy a used A15 ref module but I still may end up with one
that has an OCXO that's out of cal range.
Reply off-list is fine.
-Brian, W
-Brian, WA1ZMS/4
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rry for BW.
-Brian, WA1ZMS/4
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I found this to be a nice video for the non-Time Nut to try and understand
what & why about time..
http://knowmore.washingtonpost.com/2014/03/17/this-man-knows-what-time-it-is
-but-not-what-time-is/
-Brian, WA1ZMS/4
___
time-
500GHz? You must mean 50GHz.
Because 1Hz at 500GHz is 2E-12. (You're already there at your goal.) And
what frequency counter are you using at half a THz? :- )
(My highest freq 2-way ham contact has been on 403GHz and that took me years
to make.)
-Brian, WA1ZMS/4
-Original Me
time.
The nice thing is I can clip the opto sensors and remove them just as quickly
with no change to the mechanism itself.
Again...what a great bunch the Time Nut crowd is!
-Brian, WA1ZMS/4
iPhone
On Jan 31, 2014, at 4:00 PM, Joe Leikhim wrote:
> Count the period where the counterweight
ought still gives me pause.
-Brian, WA1ZMS
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Europe.
I think the best I can do is to use the basic design from the article that
David noted and will have to adjust the clock once a week after winding.
-Brian, WA1ZMS/4
iPhone
On Jan 31, 2014, at 4:33 AM, mike cook wrote:
>
> Le 31 janv. 2014 à 06:06, Brian, WA1ZMS a écrit :
&g
s being advanced
to wind the weight cable. Not the case for 200+ year old clocks.
Regards,
-Brian, WA1ZMS/4
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and fol
Oppps!
Thought I deleted the reflector e-mail!
Sorry for BW.
I am blushing. :- (
-Brian, WA1ZMS/4
iPhone
On Jan 30, 2014, at 7:16 PM, "Brian, WA1ZMS" wrote:
> Tom-
>
> A friend of mine John Delaney, of Delaney Antique Clocks (who has sold me
> some VERY nice 2
takes load off the weight and the clock
loses time. Yet another problem to solve.
-Brian, WA1ZMS/4
iPhone
On Jan 30, 2014, at 7:04 PM, "Tom Van Baak" wrote:
> I remember they recorded it. I just found out today it's on YouTube! Cool. I
> guess. It's always weird
(USPS is best for
domestic sale)
Is it worth $60??? Based on e-pay prices that are all over the place, I
think it's a valid first try.
Please reply off-list. First one wins.
Thanks for the BW.
Regards,
-Brian, WA1ZMS/4
Forest, VA
__
needs and they both test fine so unless they are
determined to be some kind of ultra-low PN oscillator, I could as well offer
them for sale to the Time-Nuts group.
Comments welcome.
Regards,
-Brian, WA1ZMS/4
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ell phone network.
Sorry, I cannot go into our customer base.
-Brian, WA1ZMS/4
iPhone
On Jan 8, 2014, at 5:18 PM, Nathaniel Bezanson wrote:
>
> Brian, WA1ZMS wrote:
>> In my case, SW masking of hold-over alarms may be a shorter fix without any
>> HW fixes.
>
>
aving chronic GPS drop-outs that
I traced to GPS jamming and documented. Could be the same or not.
This latest issue is on the East Coast.
Again, there is a wealth of great knowledge here in Time Nuts and I'm glad to
be able to call on help!
-Brian, WA1ZMS/4
iPhone
On Jan 8, 2014, at 11:57
Does that help explain it?
Or does WAAS not offer a classic 1PPS signal in it's data stream? I thought it
had to in order to offer compatability.
-Brian, WA1ZMS/4
iPhone
On Jan 8, 2014, at 3:50 AM, Hal Murray wrote:
>
> wa1...@att.net said:
>> In this case the timing rcvrs
about a HW solution. :- )
-Brian, WA1ZMS/4
iPhone
On Jan 7, 2014, at 11:05 PM, Magnus Danielson
wrote:
> Brian,
>
> On 2014-01-08 02:25, Brian, WA1ZMS wrote:
>> Hypothetical question
>> For a given set of GPS timing grade receivers at multiple locations, is
>
Hypothetical question
For a given set of GPS timing grade receivers at multiple locations, is there
any advantage by limiting allowable SVN numbers to only be the WAAS satellites?
-Brian, WA1ZMS/4
iPhone
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B's talk at a recent time conference on the West Coast. So it is a mix of
old and new for me at this point. Apologies if this goes OT.
Regards,
-Brian, WA1ZMS/4
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Tom Van Baak
Sent: Tues
gear had issues yet 99% of us Time-Nuts never noticed an issue.
Oh well......
-Brian, WA1ZMS
On Sep 6, 2013, at 12:23 AM, "John C. Westmoreland, P.E."
wrote:
> Hello All,
>
> Not to go off on a tangent here but are there 'time nuts' distributed
> around t
annot be openly shared. But if anyone has
hint or clue, I would much appreciate it.
BTWmy GPS receivers here in VA seemed to have had no issue. Go figure.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Brad Dye
Sent: W
vided or multiplied
as needed.
As another post on this thread said, there are a number of factors involved
and while 1MHz might be "better", the size of the crystal becomes a
trade-off.
What I don't know fills MANY text books!
-Brian, WA1ZMS
-Original Message-
From: time-
My 2 cents
In a talking to Charles Wenzel about
this very topic some 13 yrs ago, I liked
it when he said sometimes it comes
down to the "quartz-to-crud ratio" of
the crystal that makes all the difference
for a given crystal frequency.
-Brian, WA1ZMS
On Aug 4, 2013, at 8:40 PM
What's gets me is that I didn't think of this snake oil first.
Had I thought of it first I could own a PTI H-MASER by now. :- )
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Didier Juges
Sent: Tuesday, Jun
mpact was
the outage may or may not have been an issue.
Did any Time-Nuts notice any complete GPS outages on May 12th?
-Brian, WA1ZMS
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an H-MASER
then I'd be in Time-Nut's Nerdvana!
-Brian, WA1ZMS
On Oct 4, 2012, at 4:59 PM, paul swed wrote:
> Brian
> Funny you mention the dirty emult. At the time I was wondering and if there
> was any insane way to get the Cs off the e multiplier. HV to ground or
> somethin
en run the risk of arcing in the
E-mult and an issue of burning up
the resistor divider stack that I believe
is part of the E-mult.
I can see it now.. an end-of-life Cs
tube that needs 35kV on the E-mult
to get any beam current to work with!
: -)
-Brian, WA1ZMS
On Oct 4, 2012, at 3:41 PM,
Let me just say that that's flea power!
I saw some 80watt jammers being sold for movie theaters and churches.
There is some very "black market" items from China, via Hong Kong and can
arrive at your doorstep in just 4 days via DHL! What's out there would scare
you.
Been dealing with the fall ou
One of "fine" units from Hong Kong delivered +32dBm of wide-band FM noise
centered on 1575MHz!!! Just a tad more range than 10m I would expect.
-Brian, WA1ZMS
(sent from my over-priced iPad3)
On Oct 3, 2012, at 8:44 AM, shali...@gmail.com wrote:
> It is not that hard to transm
Shameless plug for JLT, but they helped me with a "special application" need in
my day-job and it worked like a charm!
One happy customer.
-Brian, WA1ZMS
(sent from my over-priced iPad3)
On Oct 2, 2012, at 5:36 PM, saidj...@aol.com wrote:
> Hello Paul,
>
> thanks mu
I have one of those myself.
I have been looking for a schematic. Does anybody have one?
Better yet, a full manual!
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Louis Mamakos
Sent: Wednesday, September 26, 2012 2:40
He seems to give no specs on group delay.
That is very critical for timing applications, but not much of an issue for
your iPhone if you don't mind yet another 10m of error.
My 2 cents...
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts
loop is closed. Could be a clue.
Time to get it up "on- blocks" on the bench and see just what is going on.
Thanks to all! :-)
-Brian, WA1ZMS
-Original Message-
From: J. L. Trantham [mailto:jlt...@att.net]
Sent: Tuesday, September 11, 2012 6:07 PM
To: wa1...@att.net; '
not yet a member of the "Green Light Club"
in that the continuous operation light fails to light.
The control loop appears to try and slew the OCXO
way off frequency. My best guess is a defective A7
AC amp module.
Time to trouble shoot! :- )
Comments welcome.
re-amp. So each application of a mixer
can often be based around what you
are doing with it.
Each time I use one, I learn a new
fact! :-). Great hobby!
-Brian, WA1ZMS/4
On Sep 9, 2012, at 4:41 PM, Bruce Griffiths wrote:
> David Kirkby wrote:
>> On 9 September 2012 18:2
oud either.
MY DEEPEST AND SINCERE APPOLOGIES TO ALL!
I am embarrassed.
My first and only hack in 20+ years of e-mail. So I guess
I was overdue. Yahoo/AT&T today. When will G-Mail get hit? :- )
Life in a modern spam rich world.
73,
-Brian, WA1ZMS
(If you don't see th
t
you have into it.
Besides...they make a good all-in-one box that you can play around with ext
locking and learn.
And remember"Experience is something you always get, AFTER you needed
it!" :- )
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-n
Me too, please.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of dlewis6...@austin.rr.com
Sent: Sunday, August 12, 2012 2:55 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] FRK specs
Thanks Tom.
I agree, the SRS seems to be the best
overall Rb except maybe on old HP if one is willing to spend about the same
price on a 20 year old unit. The SRS units I bought for work were only $2700
with chassis, rack ears and multiple outputs.
-Brian, WA1ZMS
On Aug 12, 2012, at 3:17
tack up today?
I'm looking to buy an Rb that's better than my LPROs and other models.
But I do not own an FRK-H.
Looking for comments, please.
Thanks in advance,
-Brian, WA1ZMS
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pm my time will produce more date.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of gandal...@aol.com
Sent: Saturday, July 28, 2012 2:27 AM
To: time-nuts@febo.com
Subject: Re: [time-nuts] Lightsquared questionfor SFO
emote reporting from techs out in the field and their
daily reports and conference calls.
So I just need to "due engineering diligence" as I try and help them.
I expect my butt will be on a plane next week unless I can identify a 3rd
party vendor equipment problem.
THANKS!
-Brian, WA1Z
Does anyone know if there is ANY recent active Lightsquared testing taking
place in the SFO area of the US?
I'm dealing with a day-job issue with GPS clocks in the Bay Area showing
"GPS unlocked" errors from 3rd party equipment.
was also a dead rabbit!
BTW
.All 3 cats have been interviewed and none will admit to
being involved in any way.
-Brian, WA1ZMS/4
Forest, VA ßwhere the AC mains are back on and the venting
of the shack/lab continues with an outside air temp of 38C.
No kidding! Whats worse the heat or
A US East Coast chain of stores called Batteries Plus can sell you cells and
spot weld them in any almost any way you want.
At least my local store can do that here in Virginia.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
in VA
as of last night who have no commercial utility power. Could be days before we
get AC power back!
So far, my generator is keeping parts of the house cool as well as the ham
shack.
-Brian, WA1ZMS/4 Forest, VA
On Jun 30, 2012, at 8:05 PM, Scott Newell wrote:
> National Institute
y...he didn't last
long in his job and left the company.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Bob Camp
Sent: Thursday, May 03, 2012 7:42 PM
To: Discussion of precise time and frequency measurement
Subject:
ination of both.
The choice of loop BW depends on what Tau you want
and what grade of Rb you are trying to improve.
But as PHK said, the article was a bit thin on details.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Azel
Sorry for band width to group!
Stupid iPhone! :-)
-Brian, WA1ZMS
On Feb 17, 2012, at 5:15 PM, "Brian, WA1ZMS" wrote:
> Bob-
>
> I have a spare that i need to test and make sure all is OK.
>
> Any interest?
> Make me an offer and it's yours after I get ti
Bob-
I have a spare that i need to test and make sure all is OK.
Any interest?
Make me an offer and it's yours after I get time to test is out.
-Brian, WA1ZMS
On Feb 17, 2012, at 4:56 PM, bownes wrote:
___
time-nuts mailing list -- time
FWIWI used denatured alcohol and acetone. Just be sure to wear chemical
safe gloves and plenty of shop rags.
But it comes right off. Fumes are bad too.
Let the rags dry out before you put them in the trash.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com
Thanks John!
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of John Ackermann N8UR
Sent: Friday, February 03, 2012 9:41 PM
To: Time-Nuts
Subject: [time-nuts] Rubidium Performance
Someone earlier today made the point
I used a T7 bit for mine.
-Brian, WA1ZMS
On Jan 17, 2012, at 6:24 PM, "Paul F. Sehorne" wrote:
> Nope. Looked at them with a jeweler's loupe. They are Torx.
>
> On 1/17/2012 5:13 PM, Peter Gottlieb wrote:
>>Most likely they are 1/16" hex.
>>
GPS has its own time scale. Part of the GPS data stream contains the number
of seconds that GPS and UTC differ by.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of Dan Rae
Sent: Monday, January 16, 2012 7:21 PM
To
My "rivets" were tiny Torx screws.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of J. L. Trantham
Sent: Wednesday, January 11, 2012 9:22 PM
To: 'Discussion of precise time and frequency measurement'
Thank you though. Got it working fine thanks to all the answers and help!
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com] On
Behalf Of gonzo .
Sent: Wednesday, January 04, 2012 2:18 AM
To: time-nuts
Subject: Re: [time-nuts] FE-5680A
My E-bay FE-5680A finally arrived. (4weeks later)
Of the pins on the DB-9 connector, which one is the RF output?
The manual only talks about an SMA output.
I know this has been talked about before, but I cannot find the thread.
Thanks in advance & sorry for bandwidth,
-Brian, WA
Brian, WA1ZMS
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ment racks I have and
see that at least the minute's digits read either: 00, 15, 30, or 45. And
FWIWthe LED display is driven by the NMEA data coming out of the GPS RX
inside a Z3810A.
How's that?
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [m
Thanks guys. Got the info I had been looking for. This group is a great
resource!
Only purpose for this project is so that the Westminster clock chimes at the
same exact moment at the GPS driven UTC LED display in the lab shows the
quarter hour.
Why
Why not! :- )
-Brian, WA1ZMS
that, I can synthesize
a pulse train from one of the 10MHz lab clocks to drive the electromagnets to
cause a subtle synch at the end(s) of the pendulum travel. The pulse train freq
is custom for a given clock.
Anyway.. that's my scheme for now.
Feedback welcome.
-Brian, W
y-job around some RF simulcast tranmissions.
Thanks in advance. Contact off list please.
-Brian, WA1ZMS
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Paul-
Check rcvd. Thanks!
I your post where you wnted to talk to Corby. Maybe he can
work some life out of that tube. Please let me know.
Alsoif you ever cut it open, remember to send me pix!
73,
-Brian, WA1ZMS
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I'm sorry. Somebody else beat you to it. :-(
Thank you, however.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]On
Behalf Of dlewis6767
Sent: Saturday, August 06, 2011 5:53 PM
To: Discussion of precise time and frequency measur
The CBT has found a new home.
-Brian, WA1ZMS
On Aug 6, 2011, at 12:03 PM, "Brian, WA1ZMS" wrote:
> Cleaning out my storage area.
>
> I have a know dead HP 05060-6090 CBT. SN: 1506A2030. Failure is hard and is
> one of the heating wires. Failed due to mechanical sh
ld like to US address
only if possible. You pay shipping.
Pleaee contact off-list if interested.
-Brian, WA1ZMS/4
Forest, VA
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bob-
you coming to greylock?
-Brian, WA1ZMS
On Jun 11, 2011, at 12:13 AM, bownes wrote:
That small hemispherical antenna could also have been 900mhz. I have
one here @ home that is a combined gps/900mhz antenna from an
ambulance tracking system.
On Jun 10, 2011, at 22:01, Hal
If you think you're being tracked by the police or
a private-eye (ie: ugly divorce!) one might think
that a GPS jammer would be to their advantage.
Buy one on e-bay and you think all is OK.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts
Does any one have a copy of the datasheet or can point me to one
for a Vectron 204-2556-3 10MHz OCXO? I am having no luck.
Thanks in advance.
-Brian, WA1ZMS
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one! :-)
-Brian, WA1ZMS
-- Original message --
From: "Morris Odell"
>
> Hi all,
>
> I recently picked up another 5061A (my second now, I'm becoming a real
> Time-Nut :-). The tube seems to be OK, it started up nicely and has been
>
I used the LF coil to test for beam I when I found a used tube. I was
able to confirm it had "Cs emission".
-Brian, WA1ZMS
On Oct 19, 2009, at 10:28 PM, serv...@frequencystandards.com wrote:
3. hp5061a/b no I beam current (paul swed)
Message: 3
Date: Sun, 18 Oct 2009 12:25:30
bruce-
do you have a favorite ZCD schematic that you can share?
many thanks in advance!
-Brian, WA1ZMS
On Jul 25, 2009, at 9:36 AM, Bruce Griffiths
wrote:
Bert
If you intend to use a USB interface then its probably essential to
use
an optical isolator or equivalent between the zero
Just noticed this.FYI
Not sure how this fits in with eLORAN efforts.
The Operating Status of LORAN-C
LORAN-C provides coverage for maritime navigation in U.S. coastal areas. It
provides navigation, location, and timing services for both civil and military
air, land and marine users. LOR
59:59
23:59:60
00:00:00
00:00:01
I'll try and snag a few seconds of video from the DVD around the event
if anybody is interested. Had WWV on in the background but was not mic'ed
very well so sound is low.
-Brian, WA1ZMS
___
time-nuts maili
Luis-
Only beacuse I was more familiar with balanced doublers,
and felt that the x4 would need tougher filtering.
The balanced doublers also have much better conversion
efficiency, thus fewer gain stages. Or so I think.
Besides, I had drawers full of 1N5711 diodes, & toriods!
-Brian
-
gain stages are not
running near compression. I do still agree with your
earlier comment about getting the most from that portion
of the chain.
-Brian, WA1ZMS
-Original Message-
From: time-nuts-boun...@febo.com [mailto:time-nuts-boun...@febo.com]on
Behalf Of John Miles
Sent: Tuesday, Dec
First, thanks for the replies from all.
More info on the LO chain:
1) 5MHz Wenzel OCXO <--Custom Osc for me.
2) MSA-1105 buffer MMIC and lumped LPF
3) 5MHz to 10MHz 1N5711 diode based doubler
4) MSA-1105 buffer and lumped LPF
5) 10MHz to 20MHz 1N5711 diode based doubler
6) 20MHz BPF
7) 20MHz dri
Bruce-
OK... So, linear operation does therefore seem to be the preferred
way to operate these MMICs rather than operation into compression.
That's what I seem to be observing if only because my final RF
frequency is so high and RX bandwidth so low.
Having said that, if my frequency synthesis sch
I would assume that the bleeding takes place
just after the first molecule has performed it's
dissecting task.
-- Original message from "J. L. Trantham, M. D."
: --
> I really enjoy reading the mail on this group, but I thought it was the
> 'front molecule on the cut
John-
I do agree with you. The pain is in the early stages of the
LO chain. Since I'm planning to use QRSS CW (that's very
slow speed Morse Code with very narrow demod bandwidths for
non-hams on this reflector who may not be familiar with QRSS),
the noise very close to the carrier become key.
A
Looking for comment here...
The background:
I'm working on a sub mm-wave LO chain for
a ham radio application. While chasing issues
of close-in phase (ie: within 1KHz of RF
carrier) by peeling the "layers of the onion",
I'm starting to question the performance of
the MMICs that are used as buffers
This sounds to be a very similar method that my Tracor 895A uses.
Does that sound correct?
-Brian, WA1ZMS
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Behalf Of Neville Michie
Sent: Saturday, November 08, 2008 5:09 PM
To: Discussion of precise time and frequency
Per the last statement in the message below:
"The danger running without a working ion pump, though, is that at
eventually you'll damage the electron multiplier."
Is it correct to presume then that the EM becomes covered in
"cesium splatter" and thus the S/N output g
Does anyone have a manual or at least a schematic for
an HP-5085A back-up power supply?
I searched the web and didn't find anything. That doesn't
mean it's there, just that I was unable to find it!
Thanks in advance,
-Brian, WA1ZMS
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