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On Thursday 08 November 2007, Chuck Harris wrote:

I doubt it, we need someone that understands gears to
get his hands on one, and spec it out... which returns
us to the beginning of the thread... <smirk>

Not much there. Apart from "blank" specs like face width, regular spur gears
really have the pressure angle, and two parameters from which you derive the
pitch and the diametral pitch (in Europe you have modulus), in any event
three numbers describe the spur gear. As for bevel gears, you need an angle
added to it, IIRC. Any machinery design book will have a drawing for that.

Spur gears can be trivially measured using a microscope with a coordinate
table with readouts (got such a baby), bevel gears too if you're a little
craftier. You really need to get just a couple of points and mark their
coordinates on a drawing, more points if the gear is deformed and you need to
mathematically straighten it out.

Cheers, Kuba

On Thursday 08 November 2007, lothar baier wrote:

the problem with parts mules is that you really dont know if the unit you
get doesnt have the same problem and if it doesnt how long the part will
last

AFAIK, Chuck needed some gears just to spec them out and find off-the-shelf
supply of them. I presume he'd be fine with broken gears, as long as enough
pieces are left.

Cheers, Kuba

Jose,


Thats Great, I wish it was a C but hey I'll be happy to get this guy
working!


How is the 16500 coming along?


Mark


--- In hp_agilent_equipment@..., "Jose V. Gavila"
<eb5agv@...> wrote:

Hello Mark,

I'd say so, the A, B and C are just different on the outputs.

The firmware is probably the same.

All the boards I have seen have the PROMS soldered in, Hopefully
yours are socketed?

I don't recall by now. I need to check it in the unit, which is now

stored in my

garage. I will take a look to it ASAP.

BTW, I got a complete unit (except for some broken keys) to get

parts for my

good-looking-but-unworking one. Eventually, it worked as I 'just'

needed to swap

two boards. I don't recall the second one (it was an analog board)

but the first

one was the CPU board... I hope it has nothing to do with firmware

PROMS :-(!.

Anyway, it is worth a try, don't you think so?

Best regards,

JOSE

--------------------------------------------------------------------

--

73 EB5AGV / EC5AAU - JOSE V. GAVILA
La Canyada - Valencia (SPAIN) - Loc: IM99SM

Vintage Radio:
Vintage Test Equipment:

European Boatanchors List:

Hi, Mark,

* REPLY SEPARATOR *

On 12-Nov-07 at 13:11 Mark wrote:

Hello Fellow members,

I have a 3336B wth suspect PROMS and I am trying to track down the
images.

<snippety>

If you do track these down, please forward me a copy for the archives. I don't seem to have that one just yet.

Thanks much.


-=-=-=-=-=-=-=-=-=-=-=-
Bruce Lane, Owner & Head Hardware Heavy,
Blue Feather Technologies --
kyrrin (at) bluefeathertech do/t c=o=m
"If Salvador Dali had owned a computer, would it have been equipped with surreal ports?"

Hello Mark,

I'd say so, the A, B and C are just different on the outputs.

The firmware is probably the same.

All the boards I have seen have the PROMS soldered in, Hopefully
yours are socketed?

I don't recall by now. I need to check it in the unit, which is now stored in my
garage. I will take a look to it ASAP.

BTW, I got a complete unit (except for some broken keys) to get parts for my
good-looking-but-unworking one. Eventually, it worked as I 'just' needed to swap
two boards. I don't recall the second one (it was an analog board) but the first
one was the CPU board... I hope it has nothing to do with firmware PROMS :-(!.
Anyway, it is worth a try, don't you think so?

Best regards,

JOSE

----------------------------------------------------------------------
73 EB5AGV / EC5AAU - JOSE V. GAVILA
La Canyada - Valencia (SPAIN) - Loc: IM99SM

Vintage Radio:
Vintage Test Equipment:

European Boatanchors List:

The firmware IS the same on all three units. They all use the same
processor board, only the output attenuator/ impedance matching box is
different.

Richard



From: hp_agilent_equipment@...
[mailto:hp_agilent_equipment@...] On Behalf Of Mark
Sent: Monday, November 12, 2007 9:56 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] Re: 3336B Prom images



HI Jose,

I'd say so, the A, B and C are just different on the outputs.

The firmware is probably the same.

All the boards I have seen have the PROMS soldered in, Hopefully
yours are socketed?

Best regards,
Mark

--- In hp_agilent_equipment@...
<mailto:hp_agilent_equipment%40yahoogroups.com> , José V. Gavilá
<eb5agv@...> wrote:

Hello Mark,

--- In hp_agilent_equipment@...

<mailto:hp_agilent_equipment%40yahoogroups.com> , "Mark" <marks@> wrote:

Hello Fellow members,

I have a 3336B wth suspect PROMS and I am trying to track down the
images.

Either the single Prom image or the 4 PROM images will do as I

have a

spare 3325 CPU board which is the same except for firmware.

Please could someone let me know where I can get the images?

Best regards,
Mark

I have an HP-3336A parts unit (complete)... I wonder if PROMS would

be

similar.

Best regards,

JOSE

[Non-text portions of this message have been removed]

HI Jose,


I'd say so, the A, B and C are just different on the outputs.

The firmware is probably the same.

All the boards I have seen have the PROMS soldered in, Hopefully
yours are socketed?


Best regards,
Mark

--- In hp_agilent_equipment@..., José V. Gavilá
<eb5agv@...> wrote:

Hello Mark,

--- In hp_agilent_equipment@..., "Mark" <marks@> wrote:

Hello Fellow members,

I have a 3336B wth suspect PROMS and I am trying to track down the
images.

Either the single Prom image or the 4 PROM images will do as I

have a

spare 3325 CPU board which is the same except for firmware.

Please could someone let me know where I can get the images?

Best regards,
Mark

I have an HP-3336A parts unit (complete)... I wonder if PROMS would

be

similar.

Best regards,

JOSE

Hello Mark,

--- In hp_agilent_equipment@..., "Mark" <marks@...> wrote:

Hello Fellow members,

I have a 3336B wth suspect PROMS and I am trying to track down the
images.

Either the single Prom image or the 4 PROM images will do as I have a
spare 3325 CPU board which is the same except for firmware.

Please could someone let me know where I can get the images?

Best regards,
Mark

I have an HP-3336A parts unit (complete)... I wonder if PROMS would be
similar.

Best regards,

JOSE

Hello,

This email message is a notification to let you know that
a file has been uploaded to the Files area of the hp_agilent_equipment
group.

File : /HP8558a/dscf0187.jpg
Uploaded by : mans_9h1gb <mansueto.grech@...>
Description :

You can access this file at the URL:


To learn more about file sharing for your group, please visit:


Regards,

mans_9h1gb <mansueto.grech@...>

Hi Guys,
Thank to all that tried to help.
I have decided to do another knob from an aluminum block and with tyhe help of my friend Ray 9H1EJ this was done in a day's work. I will place some pics for those who might be interested to do the same.
Thank
Mans. 9H1GB


Mansueto wrote:

Hello Fellow members,

I have a 3336B wth suspect PROMS and I am trying to track down the
images.

Either the single Prom image or the 4 PROM images will do as I have a
spare 3325 CPU board which is the same except for firmware.

Please could someone let me know where I can get the images?


Best regards,
Mark

I have a 1345a manual, but am away from my home until Nov. 17th. I
vaguely remember that there is a trace rotation potentiometer on the
rear panel of the display unit, but I could be mistaken. I'll take a
look at the manual when I get back home, if you haven't received an
answer to your question by then.

I dont have a manual for the 1345 just for the 1349 which is the big brother, A1R160 aligns the trace (rotates) , it is located on the big board that also has the video DACs on there


Harke <yrrah53@...> wrote:
Dear all,

I recently acquired a HP 8756A scalar network analyzer. Now I'm in the
process of debugging and learning how to work with it. It seems the
display is tilted somewhat as if the crt has been rotated a little,
which, as far as I can see, is not the case. Also the testpattern is
tilted, so the problem must be in the display unit itself. I do not
have any service info on this display. Does anyone know if there is a
pot to get the trace aligned? Please let me know.
The RPG is down too but thanks to this group I have enough info to get
that operating again!

Thanks, 73 de Harke, PA0HRK





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Hi Jack,
I have replaced the strip with wires. For the EHT wire I used the inner of a length of miniature teflon coax. Avoid using too much heat.
Cheers!,..........................................................Don.

At 20.33 11/11/2007, you wrote:

The strip that carries the high voltage to the CRT in my HP 141T has
delaminated, and is arcing to the adjacent CRT shield. On a web page,
WB8ZDF mentions using super glue to repair the strip, but it seems
like I would have only one shot at the repair, and I don't trust a
random glue formulation to hold up to high voltage. Does anyone have
a better suggestion? The CRT seems to be in good shape otherwise.

Looking at a bad CRT, I see the strip is soldered to the CRT near the
face plate. I suppose I could try transferring the strip from the bad
CRT, but that looks like it would be tricky to do without damaging
something.

Thanks,
Jack Rouse

Jack,

I did it several times in the past. Only one wire (the one most separated from the others) carries about 6kV and must be replaced; remaining wires have voltages in the hundreds of V.
I remove all the insulation on the CRT and clean the area with isopropilic alcohol, to remove glue residuals. The HV wire on the strip is removed, then I solder a single wire to the HV pin on the CRT, and route that wire to the thick red wire that comes to the strip connector. I use a thin wire with PTFE insulation, ex avionic surplus. It runs practically in air, so no danger of discharge. Then I replace the original brown insulation, and cover with black PVC tape.
I always try to be fast while soldering, and to apply a minimum heath to the pin, not to break the metal-glass junction. The ideal would be to use low-temp solder, but I don't have it.
I repaired half a dozen of CRTs in that way, and all worked well (and still work after years).
The new wire must be quite thin, since there is no much space between the CRT face plate and the front panel. If the repaired CRT becomes too large it will not re-enter in the box.


73 - Marco IK1ODO / AI4YF

The strip that carries the high voltage to the CRT in my HP 141T has
delaminated, and is arcing to the adjacent CRT shield. On a web page,
WB8ZDF mentions using super glue to repair the strip, but it seems
like I would have only one shot at the repair, and I don't trust a
random glue formulation to hold up to high voltage. Does anyone have
a better suggestion? The CRT seems to be in good shape otherwise.

Looking at a bad CRT, I see the strip is soldered to the CRT near the
face plate. I suppose I could try transferring the strip from the bad
CRT, but that looks like it would be tricky to do without damaging
something.

Thanks,
Jack Rouse

However, there is no RF output until I press
RF ON/OFF twice (once to turn the RF off and blank the display, and
once to turn the RF back on). I can live with this but I was curious
if any other 8657A users have noticed this or if there is something
wrong with my unit.

Hi Chris,

I have two of the 8657A's and they both power up with the RF enabled
(if set that way before power off). Something is wrong with yours. I
will try and take a look at the service manual to see what it could be.

Mike Collins KF4BQ

Dear all,

I recently acquired a HP 8756A scalar network analyzer. Now I'm in the
process of debugging and learning how to work with it. It seems the
display is tilted somewhat as if the crt has been rotated a little,
which, as far as I can see, is not the case. Also the testpattern is
tilted, so the problem must be in the display unit itself. I do not
have any service info on this display. Does anyone know if there is a
pot to get the trace aligned? Please let me know.
The RPG is down too but thanks to this group I have enough info to get
that operating again!

Thanks, 73 de Harke, PA0HRK

Hi,

I just bought an 8657A generator and I noticed something odd compared
with other generators that I have used.
When the power is initially turned on, the unit remembers the last
setting for frequency and amplitude and displays these readings so I
know that the RAM battery must still be good (the unit was recently
calibrated by Agilent). However, there is no RF output until I press
RF ON/OFF twice (once to turn the RF off and blank the display, and
once to turn the RF back on). I can live with this but I was curious
if any other 8657A users have noticed this or if there is something
wrong with my unit.

Thanks.

Chris
KD4PBJ

On Fri, 9 Nov 2007 17:23:27 -0800, you wrote:

At 7:01 PM -0500 11/9/07, Harvey White wrote:

Is there ever a reason for the 16530A/16531A board test to fail a self
test in the acquisition memory?

I would think this should not happen. Maybe if it had something to
do with the two boards not being connected up correctly. Are there
any interconnecting cables between the boards?

One, and it's in there already, connecting the two boards. I suspect
that's the internal trigger and acquisition signals from the sweep to
the scope board.

I don't know anything
about how these two boards work together, but I can imagine you might
get some kind of error if they are supposed to connect together
internally, but aren't properly connected. Or, perhaps there's a
jumper that needs to be set. So, it may be the memory is bad like
you suspect.

Unless I missed one, there are no jumpers at all on the boards.

I checked and the only manual I have is also just the programmer's manual.

Time to look at "buy it now" I think, and failing much else, talk to
the seller.

I can't figure out why there would be a problem as well.

Also, the trace is distorted in at least one area, so I'd suspect that
the diagnostics are right. It's only about 10 samples, though, but
still....

Harvey

Regards,

Mike