Re: [time-nuts] Source for HP 53132A ROM images

[paul swed]

Look at the Ko4bb web site Diddier has various images from others like me.
Do not know if he has these. Speaking of which I need to upload some
additional images for a polarad 10 Ghz generator

On Wed, Aug 31, 2011 at 10:51 AM, Dale J. Robertson  wrote:

> Hello,
> I just replaced the power supply on a 53132A counter which had been dead
> for a long time.
> the counter seems to operate properly, But, throws a ROM self-test error on
> power-on.
> from the archives I gather that the ROMS can age and lose data.
> Does anyone have a source for the rom image files?
> I can't even imagine what Agilent might charge to repair the instrument!
> Thanks,
> Dale J. Robertson
> NV8U
>
> __**_
> time-nuts mailing list -- time-nuts@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@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

[time-nuts] Source for HP 53132A ROM images

[Dale J. Robertson]

Hello,
I just replaced the power supply on a 53132A counter which had been dead 
for a long time.
the counter seems to operate properly, But, throws a ROM self-test error 
on power-on.

from the archives I gather that the ROMS can age and lose data.
Does anyone have a source for the rom image files?
I can't even imagine what Agilent might charge to repair the instrument!
Thanks,
Dale J. Robertson
NV8U

___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Active LORAN antenna

[Ulrich Bangert]

Stan,

in the long term it may be interesting to have them all but I am currently most 
interested in the power supply schematic since my device seems to have problems 
with it. , unexpected resets, sometimes all led and display off and things  
like that.

73s and my best regards
Ulrich, DF6JB

Am 31.08.2011 um 14:37 schrieb Stan, W1LE:

> Hello Ulrich,
> 
> There are 13 each, double pages of schematics for the FS700.
> Most of my pages are marked up. When I got the manual, before I had the 
> hardware,
> I read it thru and I highlighted each adjustment in the circuit to get a 
> better understanding.
> Not much of a plot, but a pretty good story.
> 
> If you need a specific page, I can scan each 1/2 page and you can paste 
> together on receipt.
> All I have is a simple A size Cannon scanner, but I can scan to high 
> resolution.
> 
> The other alternative is to get a new manual from Stanford Research Systems 
> for ~ 35$
> Shipping may be a killer.
> 
> Please advise.
> 
> Stan, W1LE  Cape CodFN41sr
> 
> 
> 
> 
> On 8/31/2011 6:53 AM, Ulrich Bangert wrote:
>> Gentlemen,
>> 
>> I would like to thank you all for your help in this affair. In the meantime
>> we have both built the antenna according Stan's circuit and it seems to
>> perform well. It seems however that the antenna needs to be put a bit away
>> from the receiver itself because otherwise some kind of self-oscillation is
>> observed.
>> 
>> 
> 
> ___
> time-nuts mailing list -- time-nuts@febo.com
> To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
> and follow the instructions there.

Ulrich Bangert
Ortholzer Weg1
27243 Gross Ippener
Deutschland
Tel   +49 (0)4224 95071
Fax  +49 (0)4224 95072
Mob +49 (0)172 8006546
www.ulrich-bangert.de



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Active LORAN antenna

[Stan, W1LE]

Hello Ulrich,

There are 13 each, double pages of schematics for the FS700.
Most of my pages are marked up. When I got the manual, before I had the 
hardware,
I read it thru and I highlighted each adjustment in the circuit to get a 
better understanding.

Not much of a plot, but a pretty good story.

If you need a specific page, I can scan each 1/2 page and you can paste 
together on receipt.
All I have is a simple A size Cannon scanner, but I can scan to high 
resolution.


The other alternative is to get a new manual from Stanford Research 
Systems for ~ 35$

Shipping may be a killer.

Please advise.

Stan, W1LE  Cape CodFN41sr




On 8/31/2011 6:53 AM, Ulrich Bangert wrote:

Gentlemen,

I would like to thank you all for your help in this affair. In the meantime
we have both built the antenna according Stan's circuit and it seems to
perform well. It seems however that the antenna needs to be put a bit away
from the receiver itself because otherwise some kind of self-oscillation is
observed.




___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.

Re: [time-nuts] Active LORAN antenna

[Ulrich Bangert]

Gentlemen,

I would like to thank you all for your help in this affair. In the meantime
we have both built the antenna according Stan's circuit and it seems to
perform well. It seems however that the antenna needs to be put a bit away
from the receiver itself because otherwise some kind of self-oscillation is
observed.

While 1 k and 100 k are indeed far away from each other: I tried the circuit
with 0 k (!) and with 100 k without seeing a difference in performance.

BTW: Since a few of you have the antenna circuit, do you have perhaps the
scchematics of the receiver itself too?

Best regrads
Ulrich Bangert

> -Ursprungliche Nachricht-
> Von: time-nuts-boun...@febo.com 
> [mailto:time-nuts-boun...@febo.com] Im Auftrag von George Dubovsky
> Gesendet: Montag, 29. August 2011 17:22
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] Active LORAN antenna
> 
> 
> Ulrich,
> 
> I have the SRS active antenna schematic FS700-14, Revision B, 
> and it is identical to Stan's schematic except that my R3 is 
> 1k and his is 100k. Don't know which is the newer schematic.
> 
> 73,
> 
> geo - n4ua
> 
> On Fri, Aug 26, 2011 at 9:02 AM, Stan, W1LE 
>  wrote:
> 
> > Hello UL,
> >
> > My SRS active antenna is internally potted in resin, so tracing the 
> > circuit is difficult.
> >
> > I was able to chip away the PVC white housing and some of the black 
> > potting material to get at the antenna input terminal. Then I 
> > repackaged it with a new CB antenna. Living on Cape Cod, 
> quite near to 
> > the former Nantucket Loran station, I can only rarely receive
> > some of the European stations.
> >
> > The schematic in the manual shows a switch or a jumper for the gain 
> > reduction. So, the schematic is probably an old version, 
> and "all bets 
> > are off" as to what
> > the production models, we have, consist of.
> >
> > I did buy the manual form SRS and the active antenna 
> schematic shows a 
> > 2N5951, not the 2N5991 you mention. My schematic is a rev 
> B, Document 
> > Number FS700-14
> > This document in not dated.
> >
> > The frequency selective L-C filter network is different, see 
> > attachment.
> >
> > If the attachment does not get thru, please send your direct e-mail 
> > address.
> >
> >
> > Stan, W1LE Cape CodFN41sr
> >
> >
> >
> >
> >
> > On 8/26/2011 6:00 AM, Ulrich Bangert wrote:
> >
> >> Gentlemen,
> >>
> >> my friend Frank and I both miss the matching actice 
> antenna for our 
> >> Standford Research FS700 Loran frequency standards. We also do not 
> >> have a schematic of it. Nevertheless we have tried to 
> re-engineer the 
> >> circut from the part's list and the circuit description in 
> the FS700 
> >> manual. Our result is shown in the accompanying schematic.pdf.
> >>
> >> The generator in the left in conjunction with the 10 k resistor 
> >> represents the expected high footpoint impedance of the 
> very short (3 
> >> m) antenna. The VDD in the right in conjunction with the 100 ohms 
> >> resistor represents what it believed to be inside the FS700.
> >>
> >> Not shown here is a 100 k resistor that may be included 
> between the 
> >> filter output and the 7 k resistor to form a 30 dB divider 
> together 
> >> with it. Also not shown is a 390 micro henry inductance which's 
> >> impact is not to be found in the circuit descripion. Also 
> not shown 
> >> is a small neon bulb for overvoltage protection.
> >>
> >> The ac analysis shows that the overall filter function is 
> well around 
> >> 100 kHz. But it seems as if the fet (a 2N5991 in the 
> original) would 
> >> not have enough gain to counteract the overall damping included in 
> >> the front end let alone to deliver some additional gain for the 
> >> receiver's front end.
> >>
> >> We both feed the receiver currently with dipoles for 80 m 
> ham radio 
> >> and a resistor that makes the receiver think the active antenna is 
> >> connected. The receiver has a possible total of 130 dB gain and my 
> >> receiver says it uses 94
> >> dB gain while Franks receiver says it uses 102 dB gain. 
> The noise margin
> >> is
> >> also a bit better on my location. However, if one looks at 
> the manual f.e.
> >> at page 17 one could get the impression as if a receiver 
> gain of 75 dB may
> >> be considered much more normal as our values. Instead of 
> improving the
> >> reception everything gets even worse if the active antenna 
> is connected. I
> >> should also note that my qth is only 200 km away from SYLT 
> (our German
> >> Loran
> >> station) while Frank is even 70 km nearer to it.
> >>
> >> Questions:
> >>
> >> 1) Anyone an idea what we are possibly doing wrong?
> >>
> >> 2) Anyone an idea for the 390 micro henry inductor?
> >>
> >> 3) Anyone own the original schematic?
> >>
> >> TIA for your help
> >>
> >> Ulrich Bangert
> >> www.ulrich-bangert.de
> >> Ortholzer Weg 1
> >> 27243 Gross Ippener
> >>
> >>
> >> __**_
> >> time-nuts mailing list -- time-

Re: [time-nuts] Question for any HP105 owners HP5370 Settings

[John Miles]

> John,
> 
> I don't know if I am going to understand all this.
> I come from an analog world, a dinosaur, all this timing stuff as much fun
> as it is, can be awful intimidating.
> 

It only gets weirder from here!

> I am thinking there is a 1 PPS source in the Z3801a   but for the moment I
> have one of these devices
> http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=320751663786
> 
> Do you think this will work?

It'll most likely be fine.  Set your counter to use its internal reference,
and use that divider (or the Z3801A 1PPS) to drive the START jack in +TI
mode.   Then feed the other 10 MHz OCXO to the STOP jack, and see how that
works.  Once that's working you can experiment with different
external-trigger sources, and go back to 10 MHz on both input jacks.  

> Some day when you have some free time, perhaps we could have a phone
> call or
> SKYPE if you use that  and discuss 1 or 2 of these issues
> Thank you again

Sure, although I'm keeping very odd hours these days and it may be another
day or so before I get caught up.  If you'd like, send me your phone #
offlist and let me know when it's convenient to call.

-- john



___
time-nuts mailing list -- time-nuts@febo.com
To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the instructions there.