[time-nuts] OCXO shock protection
johncroos at aol.com
johncroos at aol.com
Mon May 20 06:39:52 EDT 2013
Re: [time-nuts] OCXO shock protection
Water heaters must be bolted to the wall studs. Other wise they go over. Several hundred pounds of water is a big mass.
Lived there for 50 years. Generally earthquakes are pretty localized and not a huge hazard with just a little thought. You do have to buy "earthquake insurance". Costs me about $ 400 per year for a home I still have there.
You can suspend the gear on as a pendulum from a single
line. That should provide some isolation and also a DIY seismograph. The military shock mount racks are designed to
protect a specific load. So may not work.
john k6iql - in KS. New place different hazards!
-----Original Message-----
From: time-nuts-request <time-nuts-request at febo.com>
To: time-nuts <time-nuts at febo.com>
Sent: Sun, May 19, 2013 10:13 pm
Subject: time-nuts Digest, Vol 106, Issue 94
Send time-nuts mailing list submissions to
time-nuts at febo.com
To subscribe or unsubscribe via the World Wide Web, visit
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
or, via email, send a message with subject or body 'help' to
time-nuts-request at febo.com
You can reach the person managing the list at
time-nuts-owner at febo.com
When replying, please edit your Subject line so it is more specific
than "Re: Contents of time-nuts digest..."
Today's Topics:
1. Re: Net4501's cheap.. (Tom Clifton)
2. Re: Time Nut Pickens at the MIT Flea ? (Bob Bownes)
3. OCXO shock protection (Perry Sandeen)
4. Re: Time Nut Pickens at the MIT Flea ? (paul swed)
5. Re: OCXO shock protection (Hal Murray)
6. Re: OCXO shock protection (Frederick Bray)
7. Re: OCXO shock protection (Chris Albertson)
----------------------------------------------------------------------
Message: 1
Date: Sun, 19 May 2013 19:10:22 -0700 (PDT)
From: Tom Clifton <kc0vsj at yahoo.com>
To: "time-nuts at febo.com" <time-nuts at febo.com>
Subject: Re: [time-nuts] Net4501's cheap..
Message-ID:
<1369015822.8519.YahooMailNeo at web161602.mail.bf1.yahoo.com>
Content-Type: text/plain; charset=iso-8859-1
Seller obviously figured out that somebody feels they are of value and adjusted
the selling price to see what he can squeeze out of them. ?I'd suggest making a
$20 offer if you want to try to drive the price back down to what is reasonable
Message: 6
Date: Sun, 19 May 2013 18:07:51 -0500
From: Didier Juges <shalimr9 at gmail.com>
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] Net4501's cheap...
I snatched one for $20 and they are now $59 or best offer.
------------------------------
Message: 2
Date: Sun, 19 May 2013 22:09:06 -0400
From: Bob Bownes <bownes at gmail.com>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Cc: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] Time Nut Pickens at the MIT Flea ?
Message-ID: <5B6C53A6-7B8C-47B2-8EB8-94A67F6261D8 at gmail.com>
Content-Type: text/plain; charset=us-ascii
We should plan a Time-Nuts BOF lunch after the next flea.
Saw little TN gear @ Dayton save one Efretom RBI time base for $1800 and a few
10811s of dubious quality for $50 ea. the dents put me off gambling on one since
I was given or the afternoon before! ;)
On May 19, 2013, at 21:50, paul swed <paulswedb at gmail.com> wrote:
> Hello to the group.
> I did see the leitch video DA's. Was a good price if the DA's were in the
> case. The other thing to watch out for is that Leitch made all types of DAs
> digital also. You want the simple vide monitoring DA, Equalizing DAs are OK
> also delays are a pain.
>
> John it was good to see you and Jim. Great Wx.
>
> As for the pickens not much at all. I picked up to EGG RB oscillators and
> warming one up right now to see if it will work. At $20 each worth a try.
> Other then that parts and the real find a HPIB frame for Tek modules for
> $20. Been looking for one for quite a while.
> But really little time-nuttery stuff.
>
> Stan one day one way or another would be good to run into you. I also did
> not see Paul. (The other one who is also a slight time nut)
> Regards
> Paul
>
>
> On Sun, May 19, 2013 at 6:55 PM, Andy Bardagjy <andy at bardagjy.com> wrote:
>
>> I grabbed a real nice Leitech distribution amplifier - but I took it home
>> and it was empty!
>>
>> I walked back and returned it for a refund, but the seller said he had a
>> whole stack in his office. I was gonna post to the list when I sort it out
>> - it was a real bargin, and he said he might be willing to ship them
>> around.
>>
>> Andy Bardagjy
>> bardagjy.com
>>
>>
>> On Sun, May 19, 2013 at 4:42 PM, Stan, W1LE <stanw1le at verizon.net> wrote:
>>
>>> Anyone got any Time Nut quality items at the MIT fleamarket today ?
>>>
>>> Stan, W1LE Cape Cod
>>> ______________________________**_________________
>>> time-nuts mailing list -- time-nuts at febo.com
>>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
>>> mailman/listinfo/time-nuts<
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts>
>>> and follow the instructions there.
>> _______________________________________________
>> time-nuts mailing list -- time-nuts at febo.com
>> To unsubscribe, go to
>> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
>> and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
------------------------------
Message: 3
Date: Sun, 19 May 2013 19:16:17 -0700 (PDT)
From: Perry Sandeen <sandeenpa at yahoo.com>
To: "time-nuts at febo.com" <time-nuts at febo.com>
Subject: [time-nuts] OCXO shock protection
Message-ID:
<1369016177.26485.YahooMailNeo at web120501.mail.ne1.yahoo.com>
Content-Type: text/plain; charset=utf-8
All,
?
We will be moving to southern California in the
near future.
?
My question if for people who live in that area is
do you need to do additional shock mounting for OCXO?s because of the ongoing,
usually minor, ?earth tremors that take
place?
?
I will be running two of the Lucent units and two HP
10811 series which are in my 5370B TIC?s.
?
The condo is built on a concrete slab and the only
available space will be in the garage.
?
In the Absolute Audio magazine they have had
reviews on equipment stands that had spiked legs that went in a complimentary
cup on the floor.? The idea was to turn
any vibration into heat with the spiked points.
?
Comments appreciated.
?
Regards,
?
Perrier
________________________________
------------------------------
Message: 4
Date: Sun, 19 May 2013 22:22:59 -0400
From: paul swed <paulswedb at gmail.com>
To: Discussion of precise time and frequency measurement
<time-nuts at febo.com>
Subject: Re: [time-nuts] Time Nut Pickens at the MIT Flea ?
Message-ID:
<CAD2JfAhTg_S+_++jhk2fhMgNz5s0dHeKXOMBOmjKfOC8UaC5Kg at mail.gmail.com>
Content-Type: text/plain; charset=ISO-8859-1
Good news at least the first EGG RB fired up and after adjusting the
synthesizer is locked very nicely. Letting it bake and figuring out the dip
switches. They were wrong or purposely offset. Hard to say. Lamp voltage is
12 VDC I suspect thats quite a good number if compared to the old FRS and
FRCs I have down in the 5-6V range. The FRS/C run 12 new.
Can't really find any documentation, but expected that.
Regards
Paul
WB8TSL
On Sun, May 19, 2013 at 10:09 PM, Bob Bownes <bownes at gmail.com> wrote:
> We should plan a Time-Nuts BOF lunch after the next flea.
>
> Saw little TN gear @ Dayton save one Efretom RBI time base for $1800 and a
> few 10811s of dubious quality for $50 ea. the dents put me off gambling on
> one since I was given or the afternoon before! ;)
>
> On May 19, 2013, at 21:50, paul swed <paulswedb at gmail.com> wrote:
>
> > Hello to the group.
> > I did see the leitch video DA's. Was a good price if the DA's were in the
> > case. The other thing to watch out for is that Leitch made all types of
> DAs
> > digital also. You want the simple vide monitoring DA, Equalizing DAs are
> OK
> > also delays are a pain.
> >
> > John it was good to see you and Jim. Great Wx.
> >
> > As for the pickens not much at all. I picked up to EGG RB oscillators and
> > warming one up right now to see if it will work. At $20 each worth a try.
> > Other then that parts and the real find a HPIB frame for Tek modules for
> > $20. Been looking for one for quite a while.
> > But really little time-nuttery stuff.
> >
> > Stan one day one way or another would be good to run into you. I also did
> > not see Paul. (The other one who is also a slight time nut)
> > Regards
> > Paul
> >
> >
> > On Sun, May 19, 2013 at 6:55 PM, Andy Bardagjy <andy at bardagjy.com>
> wrote:
> >
> >> I grabbed a real nice Leitech distribution amplifier - but I took it
> home
> >> and it was empty!
> >>
> >> I walked back and returned it for a refund, but the seller said he had a
> >> whole stack in his office. I was gonna post to the list when I sort it
> out
> >> - it was a real bargin, and he said he might be willing to ship them
> >> around.
> >>
> >> Andy Bardagjy
> >> bardagjy.com
> >>
> >>
> >> On Sun, May 19, 2013 at 4:42 PM, Stan, W1LE <stanw1le at verizon.net>
> wrote:
> >>
> >>> Anyone got any Time Nut quality items at the MIT fleamarket today ?
> >>>
> >>> Stan, W1LE Cape Cod
> >>> ______________________________**_________________
> >>> time-nuts mailing list -- time-nuts at febo.com
> >>> To unsubscribe, go to https://www.febo.com/cgi-bin/**
> >>> mailman/listinfo/time-nuts<
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts>
> >>> and follow the instructions there.
> >> _______________________________________________
> >> time-nuts mailing list -- time-nuts at febo.com
> >> To unsubscribe, go to
> >> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> >> and follow the instructions there.
> > _______________________________________________
> > time-nuts mailing list -- time-nuts at febo.com
> > To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> > and follow the instructions there.
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
>
------------------------------
Message: 5
Date: Sun, 19 May 2013 20:03:35 -0700
From: Hal Murray <hmurray at megapathdsl.net>
To: Perry Sandeen <sandeenpa at yahoo.com>, Discussion of precise time
and frequency measurement <time-nuts at febo.com>
Subject: Re: [time-nuts] OCXO shock protection
Message-ID:
<20130520030335.D7797800071 at ip-64-139-1-69.sjc.megapath.net>
Content-Type: text/plain; charset=iso-8859-1
sandeenpa at yahoo.com said:
> My question if for people who live in that area is do you need to do
> additional shock mounting for OCXO???s because of the ongoing, usually minor,
> ?earth tremors that take place?
I wouldn't worry about it. If you have gear you are concerned about, a bit
of foam between the gear and shelf might help.
What you do need to pay attention to is that stuff doesn't fall over. You
bolt things like bookcases to the wall.
The USGS and various local government organizations put together a good
booklet:
Putting Down Roots in Earthquake Country
http://earthquake.usgs.gov/prepare/
--
These are my opinions. I hate spam.
------------------------------
Message: 6
Date: Sun, 19 May 2013 20:10:58 -0700
From: Frederick Bray <fwbray at mminternet.com>
To: time-nuts at febo.com
Subject: Re: [time-nuts] OCXO shock protection
Message-ID: <51999442.90202 at mminternet.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
That is an interesting question. I am in the greater LA area and have
several pieces of test gear with OCXO's. I have never taken any
precautions other than making sure that the gear can't fall off the
shelf or bench. Then again, I may not be doing things to time-nuts
standards.
There are a couple of fairly simple shock mount options that I can think
of if you want to pursue this. One is to pick up a couple of military
surplus Hardigg cases that have the 19 inch shock mount racks in them.
You could mount the gear in the case or remove the rack and mount it
elsewhere. If you just want to do shock mounting for a a single piece
of gear, you might take a look at surplussales.com as they have a number
of shock mounts.
As one other person mentioned, the big thing is to secure shelves and
racks to the wall. If you have ever seen any of the earthquake
simulations where they put full-size room models on shake tables, you
will notice that one of the issues is that the walls will slap against
book shelves, knocking them over.
Fred
On 5/19/2013 7:16 PM, Perry Sandeen wrote:
>
> All,
>
> We will be moving to southern California in the
> near future.
>
> My question if for people who live in that area is
> do you need to do additional shock mounting for OCXO?s because of the ongoing,
> usually minor, earth tremors that take
> place?
>
------------------------------
Message: 7
Date: Sun, 19 May 2013 20:12:43 -0700
From: Chris Albertson <albertson.chris at gmail.com>
To: Perry Sandeen <sandeenpa at yahoo.com>, Discussion of precise time
and frequency measurement <time-nuts at febo.com>
Subject: Re: [time-nuts] OCXO shock protection
Message-ID:
<CABbxVHseqWuJ=6Nie=BrP77d7v9qubFiFDGxHz_jj1HfK2h3mw at mail.gmail.com>
Content-Type: text/plain; charset=windows-1252
Even in an active fault area the unit will see more mechanical vibration
comming fomr the building cause by walking around and the wind then by
Earthquakes. OK, every few years there might be a few seconds of ground
movement. But most of the constant stuff is very local, within the
building.
On Sun, May 19, 2013 at 7:16 PM, Perry Sandeen <sandeenpa at yahoo.com> wrote:
>
>
> All,
>
> We will be moving to southern California in the
> near future.
>
> My question if for people who live in that area is
> do you need to do additional shock mounting for OCXO?s because of the
> ongoing,
> usually minor, earth tremors that take
> place?
>
> I will be running two of the Lucent units and two HP
> 10811 series which are in my 5370B TIC?s.
>
> The condo is built on a concrete slab and the only
> available space will be in the garage.
>
> In the Absolute Audio magazine they have had
> reviews on equipment stands that had spiked legs that went in a
> complimentary
> cup on the floor. The idea was to turn
> any vibration into heat with the spiked points.
>
> Comments appreciated.
>
> Regards,
>
> Perrier
>
>
> ________________________________
> _______________________________________________
> time-nuts mailing list -- time-nuts at febo.com
> To unsubscribe, go to
> https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.
--
Chris Albertson
Redondo Beach, California
------------------------------
_______________________________________________
time-nuts mailing list
time-nuts at febo.com
https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
End of time-nuts Digest, Vol 106, Issue 94
******************************************
More information about the time-nuts
mailing list