Matthias
OK my diagrams show traditional parts like ecl gates. To Bruces comment
that the delay line is not coax. Makes sense. But I have never had to get
to the level you will need. It is odd that two do not work. But
interpolators are funny things and its possible both are on some edge. Not
to mi
The problem is that the whole VCO is packaged. The
connections from the VCO to the outside world are fairly
simple: -5,2 Volt, a bias for the buffer amplifier, the
tuning voltage and the start/stop line. The start/stop line
is tied to gnd with 2.2 µH, so even if the start/stop
circuit woud fai
On Saturday, July 04, 2015 05:20:45 PM paul swed wrote:
> Matthias
> I am afraid I am not much help here.
> I did look at the a19/20 interpolators. A lot going on in that small space.
> I guess i would check the 200 MHz feeding into it. The VCO is fairly simple
> in using a gate and a delay line. I
No the oscillator frequency determining delay line is a microstrip line on a
ceramic substrate. The coax delay lines are used for not critical delays in
the delay line vco start and stop
On Saturday, July 04, 2015 05:20:45 PM paul swed wrote:
> Matthias
> I am afraid I am not much help here.
> in
Matthias
I am afraid I am not much help here.
I did look at the a19/20 interpolators. A lot going on in that small space.
I guess i would check the 200 MHz feeding into it. The VCO is fairly simple
in using a gate and a delay line. I will guess the delay line is coax.
But there are all kinds of gat
Dear Time-Nuts,
I´m still struggling to get my 5370A to work reliable again.
It keeps showing error 04.
Sometimes it is working without any problems for hours,
sometimes it´s a matter of minutes until the error is
displayed, and sometimes I doesn´t come up without the error
at all. I don´t
There is a mod on the A model which was fixed in the B version.
As I recall, it was to reduce cross-talk. Bruce the almighty might
recall better than me.
I would recommend Perry to apply the BBB based CPU-boards. Good use of
the hardware at hand.
Cheers,
Magnus
On 12/19/2014 02:55 PM, Chuc
I saved a bunch of 5370A boards from being sent for gold scrap at a
recent TRW swap meet. A lot of the boards are common to both A and B
versions. If anyone has a need for any particular board, let me know
off list please. Nothing from the front panel.
Dan
__
In message , Mark Sims writes:
>It's not practical to convert an "A" to a true "B" model. They
>use a different input front end circuit. But, the rest of the
>machine is compatible. The "B" firmware runs on a "A". John's CPU
>board works on either version.
The only differene in the
There really is no need to convert it to a B unit, as
the A unit has the same specifications. If you put
John Seamons' BBB CPU card in it, it will simply sing
as far as speed goes, and you can use the A or B
virtual roms as you wish.
The principle difference is the B analog boards are
easier to
It's not practical to convert an "A" to a true "B" model. They use a different
input front end circuit. But, the rest of the machine is compatible. The "B"
firmware runs on a "A". John's CPU board works on either version.
_
List,
I won a 5370A from ebay. Though it seems to be missing the A channel level
knob, the unit was shown powered up with the correct 0.0 on the display,
although the unit was sold as non-working for parts or repair. But the price
was right with a best offer accepted.
So assuming (gulp) that th
Hi all!
This unit for repair only. Looking at it's master oscillator, it shows 10 MHz.
The period is 100 ns. BUT the TI is wrong. No time to play with this. $200 or
best offer plus shipping.
Thanks,
Norm n3ykf
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time-nuts mailing list -- time-nuts@fe
Hi Rick,
if you happen to be state-side, I imagine 120V fans are pretty common.
However, if you live somewhere where they 'don't do things by halves', low
voltage AC fans are hard to come by!
Any bling PC shop can supply a range of quiet DC fans, so it comes down to
practicalities.
Brushless DC
Good point Bob.
I was planning to fit a 'like for like' replacement, but there is no need to do
so
A modern 2.2W 12V fan performs to the same spec as the original 15W 115V fan.
(PAPST 8312 vs PAPST 8500d)
cheers,
Ian
> From: Bob Bownes
> Subject: Re: [time-nuts] time-nuts Digest, Vol 79, Is
that the internal fan air currents will loop around and
pass through vents, including the through-holes in the rear heat sink.)
Greg
- Original Message -
From: "gonzo ."
To: "time-nuts"
Sent: Monday, February 07, 2011 9:28 AM
Subject: [time-nuts] HP 5370A temp
H
Of gonzo .
Sent: Monday, February 07, 2011 11:28 AM
To: time-nuts
Subject: [time-nuts] HP 5370A temp
Hi all,
I just picked up an irresistibly cheap 5370A (so cheap I didn't ask if it
worked).
So far it checks out ok, but I have some questions for those of you more
familiar with this model
My 5370a's both run hot as heck. I used some cheap small c-clamps and some
old heatsinks to increase the area of the hp heatsinks. You can also run
an old fan if you have one. I've found that the whole era of Hp equipment
runs too darn hot. 3325a, 8656a, etc. etc.
Don
gonzo .
>
> Hi all,
> I just
Yup various components have been run hot.
Like others in this group add a fan to the heat sink. Found a way to route a
wire out from the raw 5 volt supply to run a 12 volt fan. Think I took one
bolt out of the heat sink to route the wire. Think I added a resistor as I
did not need a lot of air to c
Hi all,
I just picked up an irresistibly cheap 5370A (so cheap I didn't ask if it
worked).
So far it checks out ok, but I have some questions for those of you more
familiar with this model.
1) The back panel heatsink (4x TO3) is sitting on 76°C (168°F).
- is this normal?
2) Several resistors
Hi everyone,
Keep on having that HP 5370A/B conversation! I just purchased a 5370A and will
take possession this weekend. Will probably have questions next week.
Thanks,
Bert, VE2ZAZ
__
The new Internet Explorer® 8 - Faste
Where can I obtain an Extender Board Set to maintain/repair an HP 5370A?
johnrd...@googlemail.com
John GW3XPK
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To unsubscribe, go to https://www.febo.com/cgi-bin/mailman/listinfo/time-nuts
and follow the ins
I may be able to get a 5370A for cheap. It powers on and the functions
all seem to work. However, I know that the inputs are off when
measuring TI. I don't have the equipment required to get this thing
back to spec. Is there anywhere I could send this to have it worked on
without costing an arm and
While on the subject of HP5370A's with missing boards... does anybody have a
spare oven oscillator power supply board for the 5370? Yes, it's easy to
build one or kludge together the parts... but I have an advanced degree in
Lazyness with a minor in "would be nice if the machine looked good
iscussion of precise time and frequency measurement
>> Betreff: Re: [time-nuts] HP 5370A socket problem
>>
>>
>>
>> Hi,
>> I've not seen socket problems on my 5370B, but have with
>> other equipment. The TI leaf contact sockets seem to be the
>
Im Auftrag von Robert Atkinson
> Gesendet: Mittwoch, 20. Mai 2009 08:58
> An: Discussion of precise time and frequency measurement
> Betreff: Re: [time-nuts] HP 5370A socket problem
>
>
>
> Hi,
> I've not seen socket problems on my 5370B, but have with
> other equipm
rote:
> From: Chuck Harris
> Subject: Re: [time-nuts] HP 5370A socket problem
> To: "Discussion of precise time and frequency measurement"
>
> Date: Wednesday, 20 May, 2009, 5:06 AM
> Hi Didier,
>
> I have never doubted for one moment that the sockets were
>
:time-nuts-boun...@febo.com] On Behalf Of Chuck Harris
Sent: Tuesday, May 19, 2009 7:52 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370A socket problem
Hi Didier,
I just had a look in mine, and it uses plain old TI sockets.
They may, or may not be go
bo.com
> [mailto:time-nuts-boun...@febo.com] On Behalf Of Chuck Harris
> Sent: Tuesday, May 19, 2009 7:52 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370A socket problem
>
> Hi Didier,
>
> I just had a look in mine, an
Hi Didier,
I just had a look in mine, and it uses plain old TI sockets. They may, or
may not be gold (I didn't look that carefully). My unit is S/N 2217A01399,
so it sits in the middle of your two units.
I know that my unit is special (because it is mine, of course ;-), but I just
don't think
Didier skrev:
One is S/N 2128A01306 and the other is S/N 2213A01361, so they were quite a
bit apart.
I have heard of several units with similar problem, on this mailing list in
particular, which is the reason that prompted me to suspect the sockets in
the first place. I do not think the problem
One is S/N 2128A01306 and the other is S/N 2213A01361, so they were quite a
bit apart.
I have heard of several units with similar problem, on this mailing list in
particular, which is the reason that prompted me to suspect the sockets in
the first place. I do not think the problem was isolated.
I
TECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Joseph Gray
Sent: Friday, March 23, 2007 11:23 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
There isn't anything of importance on the front of mine. It just has the HP
l
TECTED]>
To: "'Discussion of precise time and frequency measurement'"
Sent: Friday, March 23, 2007 10:09 PM
Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
> If I could find the right red LEXAN/polycarbonate material then creating a
> black mask on the insi
Behalf Of Joseph Gray
Sent: Thursday, March 22, 2007 7:06 PM
To: [EMAIL PROTECTED]; Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
Many businesses that sell glass also sell Plexiglass.
- Original Message -
From: "Bill Ja
> Many businesses that sell glass also sell Plexiglass.
Around here (Silicon Valley), I'd try Tap Plastics. They can cut/bend and
have a pretty good stock. It would help if you had a sketch of what you
want, but you might be able to make one by measuring the hole you want to
fill.
It wouldn'
Many businesses that sell glass also sell Plexiglass.
- Original Message -
From: "Bill Janssen" <[EMAIL PROTECTED]>
To: "Discussion of precise time and frequency measurement"
Sent: Thursday, March 22, 2007 5:34 PM
Subject: Re: [time-nuts] HP 5370A Frequency c
ohn Miles
> Sent: Wednesday, March 21, 2007 8:50 PM
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
>
> I just pull the board (it's fairly obvious how, but I believe the manual
> also talks about how to
In message: <[EMAIL PROTECTED]>
"Jack Hudler" <[EMAIL PROTECTED]> writes:
: I can restore a heavily damaged face (Scratched to the metal) to like new
: with a few hours work. (Curse those idiots that scrape of stickers!!)
What about a cracked in half face plate? Any cool trick to repa
March 21, 2007 8:50 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
I just pull the board (it's fairly obvious how, but I believe the manual
also talks about how to disassemble the front panel), take the sliders out
of th
OK that gives me some hope that I can make this thing work. I have
started the calibration
process and got to the second step that requires a short duration
pulse. I don't know
how I will do that yet. Maybe I will skip that item and go to the next.
The processor seems to work OK so I assume the
t; To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
>
>
> Could someone please provide me with a link or the procedure to
> disassemble,
> cleaned / lubed.
> Thanks
> Jeff
>
7:43 PM
Subject: Re: [time-nuts] HP 5370A Frequency counter Problem(s)
> It's normal for those last few digits to bounce around when measuring
> frequency. The shorter the gate time, the less-consistent the LSDs will
> be.
> How do the tolerances compare to what's in the man
It's normal for those last few digits to bounce around when measuring
frequency. The shorter the gate time, the less-consistent the LSDs will be.
How do the tolerances compare to what's in the manual's self-check
procedures? You'll note that they don't tell you to expect 10.000 000 000
MHz, but 1
I got a HP 5370A off of Ebay and although it looks terrible I thought it
would probably work OK.
But it doesn't :-( I downloaded the manual and have yet to print it out.
Question;
When doing a self check by feeding the 10 MHz from the back into the
counter it counts cycles OK
but the last 3 or
The positive supply connection to A22:U7 (LM339 quad comparator) is
shown as ground in the circuit diagram.
This is surely incorrect as the inputs of U6B and U6C are connected to
TTL(+5V VCC) signals.
Surely this is not the designers intention
The positive supply of A22:U7 should be +5V.
Is the
>
> Robert G8RPI.
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Chuck Harris
> Sent: 15 October 2006 16:15
> To: Discussion of precise time and frequency measurement
> Subject: Re: [time-nuts] HP 5370A
>
> Didier Ju
n the floor polish to a silicone
> formulation.
>
> Robert G8RPI.
>
> -Original Message-
> From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
> Behalf Of Chuck Harris
> Sent: 15 October 2006 16:15
> To: Discussion of precise time and frequency measurement
ginal Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Chuck Harris
Sent: 15 October 2006 16:15
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] HP 5370A
Didier Juges wrote:
> PS: The card edge connectors on this unit are extremely
Didier Juges wrote:
> PS: The card edge connectors on this unit are extremely tight. I
> "easily" broke one of the extractor on the CPU card, and the ROM card
I am very careful to remove boards like this, I don't like to break the
extractors. Once I get them removed, I give the card edge a wi
Bruce,
Thanks for the explanation, and you were right on the money. It looked
like one of the tuning caps was open, funny that it resonated so close
to 30 MHz. I reflowed the solder joints on the two 500pF capacitors
(even though they looked fine under the magnifier) and voila, Bob's your
uncl
David McGaw wrote:
> The 10811 is the newer SC cut crystal oscillator. The 10544 would be
> the older AT cut oscillator.
>
> At 09:43 PM 10/14/2006, you wrote:
>
>> I got an HP 5370A from eBay which did not work at power up (display was
>> messed up). After resetting all the ROMs and the CPU i
The 10811 is the newer SC cut crystal oscillator. The 10544 would be
the older AT cut oscillator.
At 09:43 PM 10/14/2006, you wrote:
>I got an HP 5370A from eBay which did not work at power up (display was
>messed up). After resetting all the ROMs and the CPU in their sockets,
>the instrument ca
I got an HP 5370A from eBay which did not work at power up (display was
messed up). After resetting all the ROMs and the CPU in their sockets,
the instrument came to life and now powers up without error message. It
has serial number 2128A01306.
However, it seems that the reference oscillator ou
>Perhaps if you notice it appear on the Agilent site you can drop me a
>email. Then I'll remove it from my site, as I need to free up some disk
>space. But until it actually appears, I'll keep it here.
If you need the space David - both manuals are at http://nm2.org/files
John
>--
>Dr. David
Joseph Gray wrote:
> Yes, that may have been me. I was looking for an "A" manual some months ago
> and could only find the "B" manual. Thanks for having that "A" manual.
You are welcome. I scanned the B manual myself, but I can't recall where
I got the A one from.
The manual on the B is the la
> Even I (owner of www.g8wrb.org) forgot that was there so did not mention
> it when I see someone (you?) needed an A manual, but was using a 5370B
> manual!!
> --
> Dr. David Kirkby
Yes, that may have been me. I was looking for an "A" manual some months ago
and could only find the "B" manual. T
Joseph Gray wrote:
> I have been looking for the operation/service manual for my HP 5370A for
> some time. I had previously found the "B" manual online. Just recently, I
> found the "A" manual at this URL: http://www.g8wrb.org/data/HP/
>
> You should also find it on the Agilent site soon, as I s
At 05:29 PM 7/25/2006, you wrote:
>I have been looking for the operation/service manual for my HP 5370A for
>some time. I had previously found the "B" manual online. Just recently, I
>found the "A" manual at this URL: http://www.g8wrb.org/data/HP/
It can also be found at http://nm2.org/files/HP537
I have been looking for the operation/service manual for my HP 5370A for
some time. I had previously found the "B" manual online. Just recently, I
found the "A" manual at this URL: http://www.g8wrb.org/data/HP/
You should also find it on the Agilent site soon, as I sent them the link.
From: "Jose V. Gavila" <[EMAIL PROTECTED]>
Subject: [time-nuts] HP-5370A update
Date: Mon, 24 Jul 2006 18:28:30 +0200
Message-ID: <[EMAIL PROTECTED]>
> Hello my friends!
Jose,
> It is time for some update...
Hehe...
> OK, I said, go back to the basics:
Hello my friends!
It is time for some update...
Last friday I picked-up locally the eBay-special 57 Euro HP-5370A :-). It
was complete but unworking. Only thing which lighted in the front panel was
the 'oscillator clock loss' LED at the left side. Internally, fan run and
all the different pow
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