Rear Cables for HP-8568B SA & Display Unit Needed
I recently purchased an HP-8568B 100 Hz to 1.5 GHz SA with matching
display and am very excited about it. ?But unfortunately the two required interconnecting
cables for the rear connections were not included.
I believe the HP part numbers are:
85662-60093 (coax interconnect), and
85662-60094 (Bus interconnect)
I was wondering if anyone had a pair of these cables they could part
with so I could see if my new baby works?? I would be happy to pay
for them plus any shipping.? Thank you !
Gedas, W8BYA
Gallery at
Light travels faster than sound....
This is why some people appear bright until you hear them speak.
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Gang,
I have found a couple of NOS HP CRTs and I can find very little info on them. I suspect they are from old oscilloscopes. They are 5083-5072 and HAR 81149. Does anyone know what equipment used them?
Thanks!
Ray Perrin VE3FN
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Re: HP Transistor 1854-0404
Dennis:
I have a couple I can send you....
Dan in Chandler, AZ
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Hi Alexandre,
Do you still have the disk image HP16505A_X.img ?
Thanks!
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Re: HP 83592B hangs 8350B sweeper
Hi - I have a cover. Send me your address and I'll mail it to you no charge.
Dan in Chandler, AZ
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I am working on an 85101B Display Processor for use on HP 8510 Network Analyzer.
The Focus Gate Amp uses two of these 1854-0404 SI NPN @ Q13, Q14 both FUBAR.
Before I purchase these on line, if someone has spares for purchase, please contact off list.
I appreciate the help, with those replaced I should be in like Flint.
Dennis
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I am working on an 85101B Display Processor for use on HP 8510 Network Analyzer.
The Focus Gate Amp uses two of these 1854-0404 SI NPN @ Q13, Q14 both FUBAR.
Before I purchase these on line, if someone has spares for purchase, please contact off list.
I appreciate the help, with those replaced I should be in like Flint.
Dennis
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Re: HP 83592B hangs 8350B sweeper
Thanks Ed, I have sorted out a few things. The drawings in the manual of A9 are back view but can be mistaken for front views because the transistors are drawn that way. This makes the schematic correct with Q1 the YIG tuning coil driver (see A8 description), Q2 the SYTM (Switched YIG Tuned Multiplier) driver (see A7 SYTM Driver), and Q3 the 78H05 regulator. I checked the collector voltages of ?Q1(pin2) and Q2(pin10 on motherboard) ? Select Freq???????? Actual freq???????? pin 2????????????????????? pin 10 50 MHz???????????????? 50.4??????????????????????? +5.63v?????????????????? +15.98v 100 MHz?????????????? 101???????????????????????? +5.44???????????????????? +15.98 500 MHz?????????????? 503???????????????????????? +3.92???????????????????? +15.98 1 GHz??????????????????? 1.006???????????????????? +2.029?????????????????? +15.97 2 GHz??????????????????? 2.012???????????????????? -1.77????????????????????? +15.98 3 GHz??????????????????? 3.002???????????????????? +8.84???????????????????? +15.99 4 GHz??????????????????? 4.007???????????????????? +5.05???????????????????? +15.16 5 GHz??????????????????? 5.013???????????????????? +1.254?????????????????? +14.34 12 GHz????????????????? 12.026?????????????????? -2.53????????????????????? +8.52 13 GHz????????????????? 13.031?????????????????? -4.42????????????????????? +7.70 14 GHz????????????????? no O/P????????????????? +2.56???????????????????? +6.91 ? They seem reasonable, but maybe not the SYTM (Q2 pin 10). The bands change at 2.4, 7.0, and 13.5. It seems strange the frequencies are close up to 13 GHz. A rough calculation has each transistor dissipating 1 to 2 watts but the regulator could be higher with 7 volts across it, so 7 to 20 watts depending on the current. I cannot measure the current of the 5v supply without cutting traces and there is no wire to hang a DC current meter onto. The heatsink gets very hot at any CW frequency. I don¡¯t think the unreg 5v should be as high as the 12v I measure. The top cover screws onto the top of the heatsink and maybe is needed to dissipate the heat, another 24 sq in of metal close to the 8350B top lid! I¡¯m going to drop this investigation for now. I don¡¯t think the lock up is due to a power supply, I have checked them all. I can get it running in CW but as soon as I press START the 8350B locks up with no display, no error, and no response to buttons. I need to switch my attention to the sweep circuits before I can calibrate anything. I know this has been meddled with because the top cover is missing and an SMA connector was loose. Peter. ? ? ?
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Show quoted text
From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-10-15 5:31 PM
To: hp_agilent_equipment@...
Subject: RE: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper? ? I just noticed the original posting - it looks like the frequency is reasonably close, but amplitude is way off. Depending on the band (N), it could just be that alignment is needed, once the basic problem is fixed.
To get enough output power available for leveling, the YTO and YTM tuning have to be properly set up to track each other through the entire range of coverage. It could be that someone before had grossly misadjusted it while trying to fix it. Once you figure out the setting/overload problem, the rest should be OK after adjustment.
If the fundamental band around 2-7 GHz (N=1) is OK, but the higher ones (N=2 or 3) are not, it could be a problem with the YTM or power amp.
Ed
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Re: HP 83592B hangs 8350B sweeper
I just noticed the original posting - it looks like the frequency is reasonably close, but amplitude is way off. Depending on the band (N), it could just be that alignment is needed, once the basic problem is fixed.
To get enough output power available for leveling, the YTO and YTM tuning have to be properly set up to track each other through the entire range of coverage. It could be that someone before had grossly misadjusted it while trying to fix it. Once you figure out the setting/overload problem, the rest should be OK after adjustment.
If the fundamental band around 2-7 GHz (N=1) is OK, but the higher ones (N=2 or 3) are not, it could be a problem with the YTM or power amp.
Ed
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Re: HP 83592B hangs 8350B sweeper
I agree - YIG coil loads on the supply may be dragging it down. But first, does it produce the right frequency at lower settings where the problem doesn't show? This would confirm that the coil drive is at least OK.
Also, as I recall, there are two YIG device coils to drive - the oscillator, which should go around 2-6 or 2-7 GHz, and the YIG-tuned multiplier (YTM) filter coil. Both go up with frequency, but the oscillator will be periodic in tuning, repeating its range while the multiplication factor "N" changes with bands. The YTM coil only goes up and up, probably taking the bulk of the current.
There's also a power amplifier to drive the YTM - it may be juiced up another notch as N is increased. 13.5 GHz may be where N changes from 2 to 3.
Ed
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Re: HP 85047A (S-param test set) with loose Port1
The test sets were designed this way on purpose.? There are test fixtures with a fixed spacing that are designed to mate with the front panel of the 85047, and one port had to have some slop so that slight variations in manufacturing would not prevent proper mating.? There are several other products like this with a "floating" design.
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Re: HP 83592B hangs 8350B sweeper
Good thought Dave, this is where I¡¯m headed next but it is difficult without a proper schematic. My manual (download) has a whole lot of extra stuff at the end of the manual that I did not print. There may be something in there. Peter. ?
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From: hp_agilent_equipment@... [mailto:hp_agilent_equipment@...]
Sent: October-10-15 12:44 PM
To: hp_agilent_equipment@...
Subject: Re: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper? ? On 10/10/2015 12:27 PM, 'Peter' bunge@... [hp_agilent_equipment] wrote:
> New clues:
>
> I started through the Section 5 adjustments and got to 5.2 step 7 with
> minor adjustments. Entering 13.5 GHz freezes the displays. They start to
> flicker at 13.370 GHz. I can no longer select any frequency above this.
>
> The second observation is that the A9 reference resistor heat sink is
> too hot to touch. It shows Q1 and Q3 power TO3 devices on the schematic
> but has 3 on the heat sink and shows 3 on the component diagram, fig
> 8-70 in my manual (83592-90079). Q2 & Q3 are identical but not directly
> connected together. Q3 is supposed to be a voltage regulator. Q1 is
> supposed to be the coil current driver. It is difficult to tell which
> device is making the heat. The parts list does not show any of the
> ¡°transistors/regulators¡±. Q1 is marked 1820-0430, Q2 & Q3 are marked ¡°
> RCA 4-0080 HYP8432¡±.
To me this further suggests a power supply problem. As you increase
the YIG coil current by calling for higher frequencies, one or more of
Q1/Q2/Q3 is heating up too much, and probably dragging one of the power
supplies down. How do the rails look when you go up into that frequency
range?
-Dave
--
Dave McGuire, AK4HZ
New Kensington, PA
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Re: HP 83592B hangs 8350B sweeper
On 10/10/2015 12:27 PM, 'Peter' bunge@... [hp_agilent_equipment] wrote: New clues:
I started through the Section 5 adjustments and got to 5.2 step 7 with
minor adjustments. Entering 13.5 GHz freezes the displays. They start to
flicker at 13.370 GHz. I can no longer select any frequency above this.
The second observation is that the A9 reference resistor heat sink is
too hot to touch. It shows Q1 and Q3 power TO3 devices on the schematic
but has 3 on the heat sink and shows 3 on the component diagram, fig
8-70 in my manual (83592-90079). Q2 & Q3 are identical but not directly
connected together. Q3 is supposed to be a voltage regulator. Q1 is
supposed to be the coil current driver. It is difficult to tell which
device is making the heat. The parts list does not show any of the
¡°transistors/regulators¡±. Q1 is marked 1820-0430, Q2 & Q3 are marked ¡°
RCA 4-0080 HYP8432¡±. To me this further suggests a power supply problem. As you increase the YIG coil current by calling for higher frequencies, one or more of Q1/Q2/Q3 is heating up too much, and probably dragging one of the power supplies down. How do the rails look when you go up into that frequency range? -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP 83592B hangs 8350B sweeper
New clues: I started through the Section 5 adjustments and got to 5.2 step 7 with minor adjustments. Entering 13.5 GHz freezes the displays. They start to flicker at 13.370 GHz. I can no longer select any frequency above this. The second observation is that the A9 reference resistor heat sink is too hot to touch. It shows Q1 and Q3 power TO3 devices? on the schematic but has 3 on the heat sink and shows 3 on the component diagram, fig 8-70 in my manual (83592-90079). Q2 & Q3 are identical but not directly connected together. Q3 is supposed to be a voltage regulator. Q1 is supposed to be the coil current driver. It is difficult to tell which device is making the heat. The parts list does not show any of the ¡°transistors/regulators¡±. Q1 is marked 1820-0430, Q2 & Q3 are marked ¡° RCA 4-0080? HYP8432¡±. Anyone familiar with this A9 assembly or have a schematic that shows the three devices?
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Re: HP 85047A (S-param test set) with loose Port1
Happens on my 85046A? 3GHz unit also.
?
John G3UGY
?
?
Thanks both for the reassurance,
So it looks like it was designed to
do that then.
- Charles
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Re: HP 83592B hangs 8350B sweeper
Thanks for the replies. Cliff: I tried the contact cleaner. No improvement but it was worth a try. There are no error messages. ? Chuck: I found the battery. Slight corrosion mainly on the battery, a little on the metal clip. Cleaned it up and borrowed a battery from my HP35. I found a supplier of bad HP35 batteries that only lasted a month, also a supplier of good ones that have lasted several years and hold a charge. I will try to find them again and post a link. These batteries are used in the HP8672A and HP8566A, probably others. Anyway this is not the problem because both my 8350B work fine with other plugins. There is no sign of damage to the 8350B or the 83592B, they are clean and shiny like new. That is not to say there is no problem caused by chemical fumes. A scrub in soapy water and rinse would be a last resort but I have done it before. ? Dennis: Yes that was the first place I looked. It passed all the tests. See below. ? Dave: I will re-check the capacitors. My resistance measurements showed a drop when A7 was removed but it was masked by the 22 ohms of the RPG lamp. I will try my ESR meter. ? The hanging occurs when starting in start/stop mode. Once I get it into CW it remains on for hours. I think it best to carry on with the full calibration. Also INSTR PRESET freezes the 8350B with blank start/stop displays. Cycling the ?power and catching CW is the only way to recover. Once the CW setup is recovered it comes on reliably in that mode. ? Is -2 to +23 dBm normal for this plug-in? (no opt 002 attenuator) Does anyone have a spare cover for the PCBs for sale? The plate that goes on top of the 83592B and has many screws. it also holds the big heat sink in place. It is obvious that someone else's fingers have been inside this plug-in. Peter. ----- Original Message ----- Sent: Saturday, October 10, 2015 2:36 AM Subject: [hp_agilent_equipment] HP 83592B hangs 8350B sweeper My 8350B with 83592B plug-in turns on?with flickering displays that go blank?and hangs the 8350B with no error message,?and no response to any switches on either the plug-in or mainframe. While flickering for a few seconds the 8350B displays show -310 MHz start and 20 GHz stop. It does the same to a second known working 8350B. All data and address lines are active when hung so I don't understand why the 8350B does not respond. If I press CW while the displays are flickering it responds. I may have to power down and up again to then enter a CW frequency, it comes up showing CW. Once in this state I can run tests and all front panel entries work. I ran all the A3 tests which show the ROMs and address decoders are OK. The frequency in CW is high by 13 to 47 MHz going from?50 MHz to 18 GHz (it covers 0.01 to 20 GHz). The power is way off. The display shows -2 to +23 dBm. Is this normal? (no opt 002 attenuator). ?-2 is actually -17 dbM?and power does not increase until about +2.5 dBm. At +10 dbM?it is actually +9.5 dBm. Does anyone have a spare cover for the PCBs for sale? The plate that goes on top of the 83592B and has many screws. it also holds the big heat sink in place. It is obvious that someone else's fingers have been inside this plug-in.
¡¤???????? 5 ¡¤???????? 4
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Re: HP 85047A (S-param test set) with loose Port1
Dr. David Kirkby (Kirkby Microwave Ltd)
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Re: HP 85047A (S-param test set) with loose Port1
Dave is correct.
I did not know this and checked port 1 on my 85046B and indeed it moves a bit. Jos PA0AMX
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Re: HP 85047A (S-param test set) with loose Port1
Hi,
Thanks both for the reassurance,
So it looks like it was designed to do that then.
The sensor connector is very slightly bent. I did power the unit up and using a signal generator,
power meter and a 30 dB attenuator measured the signal coming out of the? A port
with and without the load connected to port1 and there was > 30 dB difference so
I am hoping it is OK. I looked at the price of replacement units (from China) and
they are almost as much as I paid for the S-Box!
David, I have in the past looked at your Website so I may well be contacting you when
I have it working.
- Charles
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Re: HP 85047A (S-param test set) with loose Port1
?
Charles,
?
One of the ports on my 8503 S param test set moved, and yes it
was the one with the plastic washers on it. It drove me mad so I simply turned
the washers upside down and tightened the screws carefully.
?
73
?
Kevin
?
?
----- Original Message -----
Sent: Saturday, October 10, 2015 10:42
AM
Subject: Re: [hp_agilent_equipment] HP
85047A (S-param test set) with loose Port1
?
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Dave McGuire
Jos Raven PA0AMX