Re: E4407b 50 MHz amplitude ref signal
Dear Victor,
thanks for the kind and prompt feedback, I had a look at the block diagram and I found the 50 Mhz is switched before reaching the BNC out.
I will play with the Aligment setting to find setting preventing continuosly switching.
Everything looks clear now.
Best regards,
IW0BYL Michele
|
Re: Need support for HP-3586B and HP-3336B RPGs
on mine of which i have not been able to get
working..yet....since it is still apart......black is furthest
away, then wht w/black strip, red/wht/black, empty hole, white
w/red strip (closest to RPG)
connector? on mine only attaches one way. date on RPG Nov 1981
搁别苍é别
On 9/13/20 9:54 AM, Jim Sorenson wrote:
toggle quoted message
Show quoted text
Gentlemen,
I've just replaced the grain of wheat bulb in my HP-3336B in the
5060-0329 RPG. It works as it should. However, with my HP-3586B,
which has the same problem, I'm having no success after doing the
same bulb replacement. Can anybody tell me what the? pinouts are
for the 5 pin male plug in the 3586 and how they correspond to pin
numbers on the encoder or point me to a page on a schematic where
this information exists. I can find that information for the
3336B, but not for the 3586B - I had assumed they were the same,
but now I'm not so sure.?
I'm getting 10 volts DC on pin 1 of the 3586 instead of the 5
volts I was expecting. This would suggest a problem with the 3586
and not the encoder.?
From the RPG I have black, red-white, black-white and
red-black-white wires. How should these wires be ordered by pin
number correctly??
In case I have to replace the RPG, does anybody know if there are
other serial number RPGs that could replace the 5060-0329,?
I went through a similar problem with these units 4 or 5 years ago
and they were working when stored away. Sorry to bother all of you
again, but I lost my notes in a house move.?
Many thanks for your support and assistance,?
Jim
Jim Sorenson
W3BH
Brookline, NH
?
|
Re: Need support for HP-3586B and HP-3336B RPGs
Sounds like a supply issue. If you get the +5 and GND correctly
reversing the other two will only reverse the sense (direction) of the
RPG - so that should be easy to figure out
Cheers!
Bruce
Quoting Jim Sorenson <kjsorenson@...>:
toggle quoted message
Show quoted text
Gentlemen,
I've just replaced the grain of wheat bulb in my HP-3336B in the
5060-0329 RPG. It works as it should. However, with my HP-3586B,
which has the same problem, I'm having no success after doing the
same bulb replacement. Can anybody tell me what the? pinouts are for
the 5 pin male plug in the 3586 and how they correspond to pin
numbers on the encoder or point me to a page on a schematic where
this information exists. I can find that information for the 3336B,
but not for the 3586B - I had assumed they were the same, but now
I'm not so sure.
I'm getting 10 volts DC on pin 1 of the 3586 instead of the 5 volts
I was expecting. This would suggest a problem with the 3586 and not
the encoder.
From the RPG I have black, red-white, black-white and
red-black-white wires. How should these wires be ordered by pin
number correctly?
In case I have to replace the RPG, does anybody know if there are
other serial number RPGs that could replace the 5060-0329,
I went through a similar problem with these units 4 or 5 years ago
and they were working when stored away. Sorry to bother all of you
again, but I lost my notes in a house move.
Many thanks for your support and assistance,
Jim
Jim Sorenson
W3BH
Brookline, NH
|
Need support for HP-3586B and HP-3336B RPGs
Gentlemen,
I've just replaced the grain of wheat bulb in my HP-3336B in the 5060-0329 RPG. It works as it should. However, with my HP-3586B, which has the same problem, I'm having no success after doing the same bulb replacement. Can anybody tell me what the? pinouts are for the 5 pin male plug in the 3586 and how they correspond to pin numbers on the encoder or point me to a page on a schematic where this information exists. I can find that information for the 3336B, but not for the 3586B - I had assumed they were the same, but now I'm not so sure.?
I'm getting 10 volts DC on pin 1 of the 3586 instead of the 5 volts I was expecting. This would suggest a problem with the 3586 and not the encoder.?
From the RPG I have black, red-white, black-white and red-black-white wires. How should these wires be ordered by pin number correctly??
In case I have to replace the RPG, does anybody know if there are other serial number RPGs that could replace the 5060-0329,?
I went through a similar problem with these units 4 or 5 years ago and they were working when stored away. Sorry to bother all of you again, but I lost my notes in a house move.?
Many thanks for your support and assistance,?
Jim
Jim Sorenson
W3BH
Brookline, NH
?
|
Re: OT Question about amplifier stage in SRD mixer driver
Hi,
From the size, marking and application that is likely to be a Avantec / HP MSA0504 device
Absolute max rated current is 135 mA. Recommended operating is 60-100 mA. Oscillation is a possible issue.
Robert G8RPI.
|
Re: HP 89410A / 89441A internal 3 1/2 floppy replacement
I don't replace these old FDDs anymore, I replace with an HxC2001 emulator - see .?
It's quick and easy to get a built version from Lotharek -
I have done this with quite a few of my vintage machines and have never failed.? I have them in an HP 54624A scope and 16500C analyzer, in regular use no problems.? The 16500C had some unusual formatting and the HxC developer was generous with time and interest to get it set up.
Have a look at the HxC2001 site to see if the drive is already known to be emulated OK, although since it's all in software it will almost certainly be able to be done.
I have not bothered about loss of originality, some others of course may.? But for a functional result, I'd say this is much better than keeping the FDD.
(PS I'm also keen on replacing the HDD in machines that I use at all regularly, did this for the 16500C, replaced with IDE-CF emulator.? I no longer have to worry about the old HDD failing and the machine is much faster with flash memory replacing FDD and HDD)
|
I have? a? good? working? 8601A? which? came? without? top?o r? side? panels.....originally? mounted in? a? rack,,,,? Anyone??? that? can? provide?? or? even a parts?? unit
would? be welcome.;The? usual? negotiable? financial? considerations? apply.
Shipping? to my?? address here? in AUSTRALIA??? or an address in GILROY ca.?? OK
Info to? Pete?? VK3IZ? Qld?? Australia
|
Dave, When I go back to Colorado in a few months to collect more of my inventory, I might be able to snag you and A/D hybrid but getting a repair through Keysight would be a better option.
|
Re: E4407b 50 MHz amplitude ref signal
I think what you're talking about is the periodic switching of the CAL signal internally via an RF relay.
The external CAL BNC is normally off but can be switched on manually.
Both the constant internal switching of the CAL signal and the external CAL signal can be manually controlled via settings.
--Victor
|
HP3314 arb waveform generation
HELP?
I am trying to work out the details of the arb waveform capability of the venerable 3314. I have _some_ of it figured out, but I can't
call it obvious.
1) Does issuing the? AP? command (amplitude) after a series of? IV? commands (Insert Vector) terminate ("close") the waveform?
2) I understand that there will be a final segment of length? DT? (delta t) with height zero, but it seems like I always get TWO segments, in
addition to the ones that I create with?? VH EN VL EN IV
Could someone post, for example, the GPIB commands to generate a simple triangle wave, going zero to a positive peak, then back down to zero?
Thanks so much
The use of linear segments ("ramps") instead of the staircase elements from a typical AWG is actually rather clever and smoother
from a signal processing standpoint; I really want to get this working.
|
HP3324A - keys input configuration for a single sweep
Hi all,
Newer member - long time passionate about HP instrumentation. Truly, some of the best stuff ever made. I've been lucky to own some jewels by HP through the years.?
I recently acquired a pretty mint 3324A that I am hoping to be able configure it for 10.7MHz FM IF filters and strips sweeps. So, really, all I need is a single sweep from something like 10MHz to 11.4MHz, possibly a marker at 10.7MHz (but, given the precision of this instrument, that may not be absolutely required).
From the manual/key inputs, I can't figure how to supress the multiple everything this thing is set to default to - intervals or markers. I am able to set the frequencies, where I want to marker, etc., but, if my life depended on it, I can't get this to only go through one (1!) event/sweep. I am at the end of my wits. I've had a pretty wasy time to either key-input or program HP gear before, but this one has beaten me up really bad.?
Thank you very much in advance to anyone that can guide me a bit through this. Hopefully, the wizardry or setting up an 3324A is a simpe thing for some experienced hands on this forum.?
Thank you much in advance,
Radu.?
|
Re: OT Question about amplifier stage in SRD mixer driver
If there are only two "states" of drawing 100 or 140 mA, I'd guess you have an intermittent solder joint or component. You may want to shotgun it and gently resolder each component. If the end of a resistor, say, floats off and sticks to the iron tip, then you have found a bad part. Also, flexing the board, freeze spray, and other traditional methods may show what's going on.
U2 is likely a MMIC amplifier, like available from Minicircuits. It should be easy to find a good sub if needed. The circuit looks like it's simple and accessible enough to trace out and make measurements - most parts and runs in the suspect section are on one side, and the other is probably mostly ground plane.
Ed
|
On 9/12/20 8:54 PM, ghnatiuk@... wrote: Did you ever get your 3458A sorted out on the A/D assembly? Hi George! No, unfortunately not yet. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
|
Re: OT Question about amplifier stage in SRD mixer driver
Hi Staffan,
I have seen the current suddenly changing in a MMIC gain stage when it is oscillating. If you have an spectrum analyzer, you may want to sniff around the MMIC in both conditions. Depending on the circuit design, oscillation may either raise or lower the current.?
Rgds, Leong
|
Dave,
Did you ever get your 3458A sorted out on the A/D assembly?
George Hnatiuk
|
Re: E4407b 50 MHz amplitude ref signal
For the 50mhz signal. ?It’s not pulsed? If PICS go thu this is how mine looks on the E4407B itself ? ? The relays are normal, That’s auto align working You can turn off in system/auto align/off if it’s too annoying. ?
toggle quoted message
Show quoted text
On Sep 12, 2020, at 5:54 PM, Michele Aita <michele_aita@...> wrote:
?Hi to everyone, I just purchased an E4407b that replaced an HP8559 still doing a great job.
I'm experiencing that 50 MHz BNC out is not CW but pulsed. Is it the right way to work for this output ? There is also an annoying relays that switches most of times the trace is completed. Are the two items linked ?
Many thanks for any suggestion de IW0BYL Michele
|
Re: 8648C RF Output Question
Thank you.
Usually the simplest is the answer.
What do folks use as a blocking capacitor ? Some of these
BA Receivers I work on have high voltage on them. So far,
I just use a .1mfd with a clip lead on both ends.
Seems there may be a more exotic answer.
73, Dick, W1KSZ
toggle quoted message
Show quoted text
Says
MAX REV? PWR
50 W 25? VDC
Just above the output? on mine.
|
E4407b 50 MHz amplitude ref signal
Hi to everyone, I just purchased an E4407b that replaced an HP8559 still doing a great job.
I'm experiencing that 50 MHz BNC out is not CW but pulsed. Is it the right way to work for this output ? There is also an annoying relays that switches most of times the trace is completed. Are the two items linked ?
Many thanks for any suggestion de IW0BYL Michele
|
Re: Hewlett Packard 5335A Universal Frequency Counter Fail Massage 5.1
Hi again Sal,
?
I hear you.? This old age thing doesn’t help a bit.? I’m 71.
?
Tobias gave a good reminder about the capacitors.? These little 196D tantalums are notorious for failures.? When on a supply line you can sometimes find them by seeing a little drop of tantalum oozing out of a crack on them mostly near the top.? But that isn’t always the case.? It takes an effort to find the bad ones.
?
I suspect that the issue with my unit is probably a capacitor as well given the unexpected failure after being on standby power for several years.? The normal sequence in any failure situation with this older equipment is (1) check power supply voltages and ripple then (2) start thinking about capacitor issues.? I have witnessed problems where capacitors will seem to be functioning in the circuit but have had their ESR start to get higher causing things to misbehave.
?
The manual on this unit can be a bit daunting at first look but HP did a very good job of producing a document that really helps locate problems.? But with any document of this sort there will always be failure modes that were not thought about.? It’s a shame that the company didn’t keep producing things like this as they morphed through the years.? But it is understood that more money can be made by the manufacturer if they keep their circuitry secret and force the user to send it in for repair (if it can be repaired!).? And higher scale circuit integration using custom ASICs doesn’t help much either.
?
I’ll be watching the list to see what you find.
?
Regards,
?
Greg
|
OT Question about amplifier stage in SRD mixer driver
Hello, This is very much off topic. If anyone can direct me to a better forum (although I think this is the best one), please do. I have a driver amplifier for a step recovery diode mixer that is behaving erratically. To cut a long story short, I believe it to be the second of four stages that is the culprit (stage U2 in the attached picture, the two last stages are?flipped upside down and not visible). When working (it does so from time to time, but too seldom), it draws 100 mA and when not providing enough gain, it draws 140 mA. I know these two current levels for a fact, but not sure the 100 mA is really the expected value - only that the amplifier is working then. Frequency range is 350 - 550 MHz, no idea of expected gain or compression level. Bias is 15 V over a 75 Ohms resistor, thus giving 7.5 V at 100 mA (working) or 4 V at 140 mA (only acceptable output level around 400 MHz).  Questions: * Is it reasonable with a 100 mA current draw (and 7.5 V bias) or is this also a sign of a problem? - difficult to say, I guess. * The gain stage has shifted between 100 mA and 140 mA from time to time. Has anyone observed such behaviour for an amp like this - what could be the cause? * Anyone has a suggestion what amp this might be (U2)? The amplifier sits in an Anritsu/Wiltron 37247 VNA. Likely a 1990's design. Any comments or suggestions welcome! Regards, ? Staffan ? ?
|
Michele Aita
Jim Sorenson
Dave McGuire
