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Emailing: 410C calibration adjustments [OP-Amp]
Don Collie
Here`s the info, guys. I have both the op-amp, and photochopper version
manuals, so if you want more info, it`s there. My 410C uses the photochopper, but it works well, so I haven`t modified that part of it. I put a 3 terminal regulator for the 6.0/6.3 Volt EA53 heater. This reduced the "zero drift" quite a bit. Cheers all!.........................................Don C. The message is ready to be sent with the following file or link attachments: 410C calibration adjustments [OP-Amp] Note: To protect against computer viruses, e-mail programs may prevent sending or receiving certain types of file attachments. Check your e-mail security settings to determine how attachments are handled. |
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Re: Getting 8505A working
Keep in mind that you will probably also need to invest in the
correct crimping tools, since the contacts for the mixed-type D-subs are considered mil-spec. Such tooling, though a bit pricey if bought new (probably around $300), has the advantage that it can be used on a variety of contacts, and the tools themselves are built very well indeed. This makes them a pretty decent investment no matter where you get them. tool and positioner types you'll need. If not, drop me a note and I'll look up the numbers for you. with surreal ports?" Thanks Bruce, the Digi Key states the inner connection is soldered and the shield can be soldered or crimped. Since the hardest to solder is the center then it should not be a problem. I have ordered RG316/U cable from Ebay for $9 plus $5 shipping. On another subject is the cables from the S-parameter test set to the source/converter. Have you any idea what HP used? I was thinking Andrews Antenna FSJ-50 which is semi rigid but it would be an extreme bend radius. RG214 also comes to mind but I will have to look up what it is like at 1.3GigHz. The HP cables look thinner than RG214. Cheers, Peter. |
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Off topic [sorry] : MESSEMPFANGER [ESU 2]
Don Collie
I tried Rohde & Schwarz for schematics for this VHF/UHF test receiver, but they replied that they "stopped the repair of this equipment 10 years ago", and that "repair for the ESU 2 is no longer possible".
Can anybody suggest where I might be able to find schematics? I have the interconnection schematics for the modules, but no schematics of the modules themselves. Any help here would REALLY be appreciated, because repairing this beastie without service data is much more difficult than with...........................................Don C. |
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Re: HP410C CHOPPER FREQUENCY SETTINGS FOR 50Hz LINE ? ...FIXED!!
Don Collie
Hi Andreas,
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Email me off group, please, I have the information you want. Cheers,........................................................Don C. ----- Original Message -----
From: Andreas Terbrack To: hp_agilent_equipment@... Sent: Wednesday, January 10, 2007 7:10 AM Subject: [hp_agilent_equipment] Re: HP410C CHOPPER FREQUENCY SETTINGS FOR 50Hz LINE ? ...FIXED!! Hi all, I recently aquired a 410C, after difficulties to calibrate the AC Range properly (and a very hot Probe) I discovered a 2-01C tube in my Multimeter - running on 6.2 Volts. Funny enough my 410C is the later Dual-FET / OpAmp version ... After messing around with resistors for the filament, I changed the 6.2V Zener for a 5.1V on the supply board: Zero is nearly stable now and the AC tracks almost linear ... but still not 100% Btw: Can somebody be so kind and forward me the Balance/Gain calibration procedure for the FET/OpAmp 410c ? Cheers, Andreas "Don Collie" <donmer@...> wrote: > > > ----- Original Message ----- > From: Don Collie > To: hp_agilent_equipment@... > Sent: Tuesday, September 05, 2006 5:17 PM > Subject: Re: [hp_agilent_equipment] Re: HP410C CHOPPER FREQUENCY SETTINGS FOR 50Hz LINE ? ...FIXED!! > > > I think that a 410B probe will work OK when connected to a 410C Multimeter - the citcuit is similar in both units, with the meter side being very high input resistance. As to altering the probe itself : I`d want to check its calibration > with a levelled Signal Generator, over all the range of frequencies. After all, the thing will measure AC Voltage from 50Hz to over 500MHz - that`s seven decades! I haven`t got a 410B probe handy, but my 410C probe has a special discoidal [?] decoupling capacitor in the probe head, and H/P wouldn`t do this if it wasn`t necessary. Wheat and Chaff. > Cheers!.........................................Don Collie > > > ----- Original Message ----- > From: JOS Earthlink > To: hp_agilent_equipment@... > Sent: Saturday, September 02, 2006 2:24 AM > Subject: RE: [hp_agilent_equipment] Re: HP410C CHOPPER FREQUENCY SETTINGS FOR 50Hz LINE ? ...FIXED!! > > > Hi Chuck, > > I recall hearing that some of the early 410C used the 2-01C as in the 410B > and these run at 5v. Do you have any info on that? I also recall that the > 410C has no adjustment for the filament voltage while the 410B did have this > adjustment. Since it seems there are more 410B HV probes available than > 410C, any easy way to adjust the 410C to use a 410B 2-01C probe? > 73 Jerry > K1JOS > > -----Original Message----- > From: hp_agilent_equipment@... > [mailto:hp_agilent_equipment@...]On Behalf Of Chuck Harris > Sent: Thursday, August 31, 2006 7:11 AM > To: hp_agilent_equipment@... > Subject: Re: [hp_agilent_equipment] Re: HP410C CHOPPER FREQUENCY SETTINGS > FOR 50Hz LINE ? ...FIXED!! > > hpxref wrote: > > > Now, does anyone know if the fil supply should be 5v or 6 v? > > (for S/N 550-06965) > > I would like to know before starting a complete CAL bench check > > There is no controversy here, all 410C's are 6VDC filament for the > 12AT7, and 6.3V unregulated AC for the probe. > > -Chuck Harris > > > > > > > > > ---------------------------------------------------------- > > > No virus found in this incoming message. > Checked by AVG Free Edition. > Version: 7.1.405 / Virus Database: 268.11.7/436 - Release Date: 01-Sep-06 > > > > ------------------------------------------------------------------------------ No virus found in this incoming message. Checked by AVG Free Edition. Version: 7.5.432 / Virus Database: 268.16.8/621 - Release Date: 1/9/2007 1:37 PM |
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Re: spectrum analyzer 1st mixer
Hi,
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I am not familiar with the exact part in question, but very often, spectrum analyzer mixers are of the double balanced diode type (DBM). When working correctly, a DBM provides at least 20dB of isolation between the LO, RF, and IF ports. So, when you move the LO towards the low end of the band, like you are doing at 10MHz, the LO, and IF are approaching each other in frequency, until you hit zero (DC) Hz, where they are exactly the same frequency. If the DBM is working correctly, it will provide you with more than a 20DB isolation between the IF, and LO ports, which will reduce the amount of LO that goes right into the IF port by at least 20dB. However, if the DBM has a burned out diode, it will no longer give you much, if any, isolation between the IF and LO ports, and you will see a drastically larger amount of LO signal being stuffed into the IF port. This cannot help but wreck the amplitude flatness at the low end of the band. At the high end of the band, this lack of isolation goes all but unnoticed because the IF filters are sufficiently steep to keep the LO signal out of the IF port. -Chuck Harris ericapple2004 wrote: Hello , While the spectrumanalyzer pro-and contra's are actual on this group, |
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Re: spectrum analyzer 1st mixer
At 22.03 09/01/2007, Erik wrote:
Hello ,Erik, most probably an open capacitor, or a defective connector. Try skipping all the components before the mixer, and inject a -40dBm signal directly to the mixer; you will find if the problem is in the mixer or before it (most suspect: the AC/DC switch or the limiter). 73 - Marco IK1ODO |
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spectrum analyzer 1st mixer
Hello ,
While the spectrumanalyzer pro-and contra's are actual on this group, may be someone can help with this: My 70904A RF module (HP70100 analyzer) works perfectly from 10 MHz to 2.9 GHz , however below 10 MHz amplitude flatness goes down rapidly , -20 dB at 1 MHz . Manual says problem with 1st mixer ?? I have difficulty to understand that the mixer can be shot and at the same time performing above 10 MHz without problem ? Basic layout of the first stages are : 0-70 dB attenuator , switchable AC -DC , then limiter 10 mW dc-3GHz , then 1st mixer ... I would guess a series resistor burned out , becoming a nice series capacitor that way ?? Any suggestions for repair ? Thanks Erik Belgium PS . Other people using HP 70000 mms equipment on this group ,I like to share experience ? |
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Re: HP410C CHOPPER FREQUENCY SETTINGS FOR 50Hz LINE ? ...FIXED!!
Hi all,
I recently aquired a 410C, after difficulties to calibrate the AC Range properly (and a very hot Probe) I discovered a 2-01C tube in my Multimeter - running on 6.2 Volts. Funny enough my 410C is the later Dual-FET / OpAmp version ... After messing around with resistors for the filament, I changed the 6.2V Zener for a 5.1V on the supply board: Zero is nearly stable now and the AC tracks almost linear ... but still not 100% Btw: Can somebody be so kind and forward me the Balance/Gain calibration procedure for the FET/OpAmp 410c ? Cheers, Andreas "Don Collie" <donmer@...> wrote: SETTINGS FOR 50Hz LINE ? ...FIXED!! Multimeter - the citcuit is similar in both units, with the meter side being very high input resistance. As to altering the probe itself : I`d want to check its calibration with a levelled Signal Generator, over all the range offrequencies. After all, the thing will measure AC Voltage from 50Hz to over 500MHz - that`s seven decades! I haven`t got a 410B probe handy, but my 410C probe has a special discoidal [?] decoupling capacitor in the probe head, and H/P wouldn`t do this if it wasn`t necessary. Wheat and Chaff. Cheers!.........................................Don CollieSETTINGS FOR 50Hz LINE ? ...FIXED!! in the 410B and these run at 5v. Do you have any info on that? I also recallthat the 410C has no adjustment for the filament voltage while the 410Bdid have this adjustment. Since it seems there are more 410B HV probesavailable than 410C, any easy way to adjust the 410C to use a 410B 2-01C probe?Harris Sent: Thursday, August 31, 2006 7:11 AMSETTINGS FOR 50Hz LINE ? ...FIXED!!---------------------------------------------------------------------------- 01-Sep-06
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Re: Getting 8505A working
Good day,
* REPLY SEPARATOR * On 09-Jan-07 at 13:48 rovmkr wrote: --- In hp_agilent_equipment@..., "tunerwiz" <tunerwiz@...>Keep in mind that you will probably also need to invest in the correct crimping tools, since the contacts for the mixed-type D-subs are considered mil-spec. Such tooling, though a bit pricey if bought new (probably around $300), has the advantage that it can be used on a variety of contacts, and the tools themselves are built very well indeed. This makes them a pretty decent investment no matter where you get them. The catalog pages for the specific connectors should list the tool and positioner types you'll need. If not, drop me a note and I'll look up the numbers for you. Keep the peace(es). -=-=-=-=-=-=-=-=-=-=-=- 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?" |
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Re: Getting 8505A working
--- In hp_agilent_equipment@..., "tunerwiz" <tunerwiz@...>
wrote: They are good analyzers. I had the same problem (no cables)to theThanks Dean, I found connectors at DigiKey by searching 24w7 - this will take you to the page where the body and inserts are. I am in the process of selecting the correct coax PINs (not sockets) but have to find some coax first for the size. Do I need double shield, asuming it is available in this size? Are any of the 17 non-coax wires in twisted pairs or bundled in shielding? Any suggestion on the coax? |
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hp 86220a part
im looking for a replacement
translator module for an hp 86220a plug in as used with an 8620 a or c sweeper or possibly a junk plugin thsat might have a good module the module is a rectangular metal box attached to the bottom of the plug in part # 5086-7003 "frequency translator" their is a very similar module next to it that contains the output amplifier. the yig and cavity oscillator are ok "both measure over +10 db out the amp was checked with a -30 signal from my 8640b and it easily produced +10 out i have the manual and its acting like the pin diode modulator is shot "part of the mixer module" |
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hp 8175 fried resistor and missing cable
Just received from Ebay a 8170a as is that is missing a cable between
Video board and output board. I found a ribbon cable with plugs that fit however need help with verifying correct pin out between boards. Also power supply board has a 2 watt resister fried located next to the smaller of two bridge rectifier near center of power supply board. Could use help identifying resister and pin outs of cable or copy of schematic if anyone mite have one I would be grateful. Thanks T.O. ¡¡¡¡.. E-mail address is tloleksy@... |
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Re: SWR Meter 415E manual
Hi Rasputin,
I've sent the required manuals to you at your email. Let me know if you got them ok! Best regards. Mike G6NCE --- In hp_agilent_equipment@..., Rasputin Novgorod <priapulus@...> wrote:
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Re: HP8920/A/B diagrams
Suppose that they have some circuitry that infringes someone
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else's patent. Then, they would have a lot to lose if they released the the component level diagrams. This is one of the reasons so many companies balk at the idea of open source. If they open sourced their programs, everyone could easily see the infringement issues. -Chuck Harris tunerwiz wrote: I often wonder if Agilent have component level diagrams for these units? Surely there must be documentation because they used to repair faulty modules. Why not release this information as they are not interested in repairing units anymore? They have nothing to lose or do they? Maybe, the sale of a new current model? I fixed some units in the past by tracing out and comparing which is a very time consuming process. |
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SWR Meter 415E manual
Rasputin Novgorod
Hi all:
I'm looking for the manuals for the HP 415E SWR Meter. I expect Logsa has them, but I can't access there anymore (from Canada). I'd be grateful if someone could forward them to me, or tell me where to go (to find them...). Send to: Blair(at)Amtelecom.net Replace (at) with @. Sincerely, Blair VBE3CZY TM 9-4931-321-34P Direct Support and General Support Maintenance Repair Parts and Special Tools Lists Standing Wave Ratio Meter, Hewlett-Packard model Y10-415E (NSN 6625-00-815-6273) TB 9-4931-321-35 Calibration Procedure for Standing Wave Ratio meter Hewlett-Packard model 415E and PRD model 277D 00415-90009 SWR Meter 415E covers serial prefix 0990A- and with Appendix II Manual changes covers 719-, 545- and 530-. The Yellow Manual Changes sheets dated 3 February 1986 have changes for: 1143A, 1709A, 1750A, 2031A, 2433A, 2507A, 2547A and 2509A. But 2709A is too new for these changes. __________________________________________________ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around |
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HP8920/A/B diagrams
I often wonder if Agilent have component level diagrams for these
units? Surely there must be documentation because they used to repair faulty modules. Why not release this information as they are not interested in repairing units anymore? They have nothing to lose or do they? Maybe, the sale of a new current model? I fixed some units in the past by tracing out and comparing which is a very time consuming process. Dean |
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Re: Getting 8505A working
--- In hp_agilent_equipment@..., "rovmkr" <bunge@...>
wrote: appears on the CRT. Tip: there is a switch at the rear of the CRT sectionto control both units. So this cable is needed to check the CRT.an overlflow display. I next patch the 5 coax using individual coaxwith the correct coax connector inserts from some scrapped junk. HoweverI only have 3 so the last 2 I use connector sockets and hook up wirescan range with no relation to the markers on the screen. Tip: to seethe markers you must turn down the intensity of the CRT to faint. Theyorder a set for $25. I find www.glkinst.com sells cables andlights on the source/converter (mine is dead). What is a simple testhookup with say a 60MHz low pass filter? Any comments on the counter?They are good analyzers. I had the same problem (no cables)to the storage normalizer. To buy complete cables seemed quite expensive. Ended getting the connector and special pins and making the cables. Took about 1 hour to make 2 cable sets. The copper shield braiding for the cable I got from a aircraft parts supplier. Worked perfectly. Dean |
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Re: HP 1715A Vertical Position Problem
Dick,
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Sorry to report to you that the 171x & 172x series seems to have had a problem with that "chip". I have 2 1720A's & 1 1715A on the shelf ith the same problem and no resolution. All of the scopes respond fine when the chip is replaced with a known good one and I haven't been able to find a source for them. (other than donor scopes) Regards, Warren The first clue is that the Vertical Position only causes about 1/2 cm deflection. I checked the voltages on P5 and get a +15 to -15 swing |
Bruce Lane
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