Where is Phoebe's manuals?
Hi All,
Could someone share a link please?
Thanks
Lou
VK3ALB
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Re: HP/Harrison 6525A Service Manual with Schematics
Dave-
Mostly OT, but:? A while back a there was a discussion about the severe lack of HP service notes available and I remember that a couple of people said that they had paper copies and might make them available for scanning - have you heard anything related?? They would be a *tremendous* resource if available.
Hal
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Re: HP/Harrison 6525A Service Manual with Schematics
On 3/4/20 4:37 PM, Harold Foster wrote: In truth I as well don't think that there would be any big issue - too
many legitimate good reviews *off* ePay.? But she charges a premium for
most of the manuals sold and I just expected better follow through - so
they moved to my "when I can't find anywhere else" category. Yup, perfectly understandable. -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP/Harrison 6525A Service Manual with Schematics
In truth I as well don't think that there would be any big issue - too many legitimate good reviews *off* ePay.? But she charges a premium for most of the manuals sold and I just expected better follow through - so they moved to my "when I can't find anywhere else" category.
Hal
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Re: HP/Harrison 6525A Service Manual with Schematics
Yeah, not cool. I will be careful. :-( I think she has good
intentions and may be overloaded, at least that's my suspicion.
-Dave
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On 3/4/20 4:22 PM, Harold Foster wrote: I had a couple orders that were not shipped, numerous contact attempts
ignored and only got a response (and the items shipped) after ePay got
involved.? That being said, this was a several months or so ago and I
had not had any issues prior to then.? No reason was given for the
problems, just a promise of a partial refund that never materialized.? I
suppose it could have been a one-time bad month or something but it left
me uncomfortable with them.? Since then i have been able to find any
hard copy manuals elsewhere, but with the 6525A they seem to be the only
option for the latest version - and I'm a little leery or spending $40
for a manual and then have to fight to get it a month later.? If I can't
turn up anything else i suppose I'll chance it and hope that everything
is running a little better lately.
Hal
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Dave McGuire, AK4HZ
New Kensington, PA
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Re: HP/Harrison 6525A Service Manual with Schematics
I had a couple orders that were not shipped, numerous contact attempts ignored and only got a response (and the items shipped) after ePay got involved.? That being said, this was a several months or so ago and I had not had any issues prior to then.? No reason was given for the problems, just a promise of a partial refund that never materialized.? I suppose it could have been a one-time bad month or something but it left me uncomfortable with them.? Since then i have been able to find any hard copy manuals elsewhere, but with the 6525A they seem to be the only option for the latest version - and I'm a little leery or spending $40 for a manual and then have to fight to get it a month later.? If I can't turn up anything else i suppose I'll chance it and hope that everything is running a little better lately.
Hal
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Re: HP/Harrison 6525A Service Manual with Schematics
On 3/4/20 9:25 AM, Harold Foster wrote: Does anyone have the above manual?? All the ones I am able to locate are
missing the schematics.? There are some on ePay but they are ~40-50
dollars, and those are from Phoebe's Manuals which is not the most
reliable vendor out there. Urr? I've been quite satisfied with Phoebe's services, over maybe half a dozen transactions. What issues have you had with her? -Dave -- Dave McGuire, AK4HZ New Kensington, PA
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Re: HP3325 - no output, but sync works
Some of these use one of the relays for Front/Rear output. If the wrong output is selected, you have no output.
I am looking into a small run of new A23 compatible boards, with modern surface mount relays and resistors.
New to the group, but have used HP gear for decades. I have a 3325 which appears to have an output attenuators issue. I can see the sync output on my Tek (555) scope, but do not see anything from the signal output connector. I have tried switching amplitudes, but do not hear any relay clicking (I had read some other post about the relays being audible). This unit was purchased years back as surplus, and had a red ¡°not economical to repair¡± tag on it. I think I paid $25 for it. All the 7-segment displays work, and I can set for various frequencies, and see the sync....just no output,
Any ideas appreciated!
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HP/Harrison 6525A Service Manual with Schematics
Does anyone have the above manual?? All the ones I am able to locate are missing the schematics.? There are some on ePay but they are ~40-50 dollars, and those are from Phoebe's Manuals which is not the most reliable vendor out there.
TIA,
Hal
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Re: A dirty way to get more frequency resolution out of a signal generator
Some 3325 generators have? the Option 001 OCXO, others don't.
To put simply, take a function generator such as a HP 3325B, set the output to 0dBm at 10 Mhz, plug that into the reference input of the signal generator. Then if you want a frequency of 100 Mhz just dial that into the signal generator. If you desire more precision with the frequency than what the signal generator is capable of, just make very slight adjustments to the function frequency on the generator supplying the the reference 10 Mhz.
I would think this could work somewhat however it might not scale linear at the various frequencies set on the signal generator, and the phase noise would suffer. And to determine the actual frequency a frequency counter would be needed.
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Re: HP419A Unable to correctly adjust the chopper waveform
This has been a fascinating thread.? Recently watched video on his HP 419A LED upgrade and just had to see more of the history behind the neon switcher.? The technique is both mundane and novel at the same time.? It has certainly given repair folk a hard time over the years with ageing neons and CdS cells.
?
One rather interesting CdS cell type that I came across was in a round metal can with a glass lid about an inch (25mm) in diameter.? They were used in some dirt cheap two component day-night switches for outdoor lighting.? The high current CdS cell would control the drive of a heated bimetallic snap-action switch that was able to switch about 1000W at 240V AC. The interesting calibration technique they used gave me a chuckle.? The face of the CdS cell was painted with some aluminium paint and the amount of light that could enter the cell was adjusted by manually scratching the paint to open about 2-5% of the surface to achieve the required sensitivity.? The hysteresis may have been adjusted by bending the stop for the snap action lever that was driven by the bimetallic strip.? The unit was so simple I first thought they were fake but testing proved they worked pretty well.? Looking at the scratches on the batch of 20 it was clear that three different people were involved in calibrating these units because you could recognise the marks like signatures.? A bit like modern laser trimming of ceramic hybrid resistors.
Kalle
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Kalle Pihlajasaari
Lahti, Finland
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Re: Free (for shipping cost) -- Several HP paper manuals
Hi John!
I could really use the 8902 manuals, i have one to fix.? The 3585 =B would be handy as I am looking for one for the bench.
You could hold them until we meet up. Thanks!
Jeff Kruth
In a message dated 3/3/2020 2:55:38 PM Eastern Standard Time, jra@... writes:
I have the following manuals available for the cost of shipping from
45409.? Most are originals though a couple are good quality copies, and
most are in HP binders.
1.? 3585B Operating, Service Vol. 1, and Service Vol. 2 (3 binders)
2.? 8712ET/ES and 8714ET/ES Service Guide
3.? 8920A, 8920B User's Guide Rev. B and
? ? HP8920B HPIB Programmer's Guide with IBASIC (2 binders)
4.? 8901B Modulation Analyzer Operation and Service
5.? 8753C User's Guide and Quick Reference
6.? 3561A Dynamic Signal Analyzer Operating Manual (probably a copy)
7.? 8640B Signal Generator User and Service (original bound version)
8.? 8902A Service Manual volumes 2, 3, and 4 (3 binders)
Thanks,
John
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Re: Free (for shipping cost) -- Several HP paper manuals
Hi John
Sorry but 45409 is not a UK post code
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-----Original Message----- From: [email protected][mailto: [email protected]] On Behalf Of John Ackermann N8UR Sent: 03 March 2020 19:55 To: [email protected]; [email protected]Cc: Tom Holmes; Mike Suhar; Daun Yeagley Subject: [HP-Agilent-Keysight-equipment] Free (for shipping cost) -- Several HP paper manuals I have the following manuals available for the cost of shipping from 45409. Most are originals though a couple are good quality copies, and most are in HP binders. 1. 3585B Operating, Service Vol. 1, and Service Vol. 2 (3 binders) 2. 8712ET/ES and 8714ET/ES Service Guide 3. 8920A, 8920B User's Guide Rev. B and HP8920B HPIB Programmer's Guide with IBASIC (2 binders) 4. 8901B Modulation Analyzer Operation and Service 5. 8753C User's Guide and Quick Reference 6. 3561A Dynamic Signal Analyzer Operating Manual (probably a copy) 7. 8640B Signal Generator User and Service (original bound version) 8. 8902A Service Manual volumes 2, 3, and 4 (3 binders) Thanks, John ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2016.0.8048 / Virus Database: 4793/15886 - Release Date: 08/14/18 Internal Virus Database is out of date.
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Re: Free (for shipping cost) -- Several HP paper manuals
If still available, I would like the ones for the 8901B and the 8640B.? Please let me know if they are available and how much to send to Zip 35601.
Thank you,
Harold Foster
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Re: Free (for shipping cost) -- Several HP paper manuals
Hello,
how much would this:
5. 8753C User's Guide and Quick Reference
be to Hungary?
Tam
With best regards
Tam HANNA
Enjoy electronics? Join 15k7 other followers by visiting the Crazy Electronics Lab at
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On 2020. 03. 03. 20:55, John Ackermann N8UR wrote: I have the following manuals available for the cost of shipping from
45409. Most are originals though a couple are good quality copies, and
most are in HP binders.
1. 3585B Operating, Service Vol. 1, and Service Vol. 2 (3 binders)
2. 8712ET/ES and 8714ET/ES Service Guide
3. 8920A, 8920B User's Guide Rev. B and
HP8920B HPIB Programmer's Guide with IBASIC (2 binders)
4. 8901B Modulation Analyzer Operation and Service
5. 8753C User's Guide and Quick Reference
6. 3561A Dynamic Signal Analyzer Operating Manual (probably a copy)
7. 8640B Signal Generator User and Service (original bound version)
8. 8902A Service Manual volumes 2, 3, and 4 (3 binders)
Thanks,
John
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Free (for shipping cost) -- Several HP paper manuals
I have the following manuals available for the cost of shipping from
45409. Most are originals though a couple are good quality copies, and
most are in HP binders.
1. 3585B Operating, Service Vol. 1, and Service Vol. 2 (3 binders)
2. 8712ET/ES and 8714ET/ES Service Guide
3. 8920A, 8920B User's Guide Rev. B and
HP8920B HPIB Programmer's Guide with IBASIC (2 binders)
4. 8901B Modulation Analyzer Operation and Service
5. 8753C User's Guide and Quick Reference
6. 3561A Dynamic Signal Analyzer Operating Manual (probably a copy)
7. 8640B Signal Generator User and Service (original bound version)
8. 8902A Service Manual volumes 2, 3, and 4 (3 binders)
Thanks,
John
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Re: HP 419A Null Voltmeter - Purchase
I will study your writeup with great pleasure once you have it organized and published. Remind me how you are matching your H11F's and canceling the remaining offset. Dave Wise ________________________________________ From: [email protected] < [email protected]> on behalf of Sergey Kubushyn via Groups.Io <ksi@...> Sent: Monday, March 02, 2020 10:38 PM To: [email protected]Subject: Re: [HP-Agilent-Keysight-equipment] HP 419A Null Voltmeter - Purchase OK, I've put everything together finally for the first run as a whole and it worked like a charm. Not fully assembled yet (covers not installed) but otherwise pretty complete. There are still screwups so the main board (that big one replacing the existing amplifier) will have to be re-spun
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Re: WTB HP 8660C Module Extension Cables 11672
I would like to buy these!
Please contact me directly at fourdesigns@...
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Re: WTB HP 8660C Module Extension Cables 11672
Sorry for the bandpass. No reply from you On Tuesday, March 3, 2020, 01:59:48 AM GMT+1, Bob Koller via Groups.Io <testtech@...> wrote:
JF,
Thanks, I have contacted you, (I think), through your contact in on this forum.
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Re: A dirty way to get more frequency resolution out of a signal generator
Hi,
This is pretty similar to what the 8640B signal generator does. You
can lock the oscillator to the quartz time base via the counter. Then
by changing the counter timebase you can fine tune the frequency. One
caveat is that the counter will not indicate the change as the
generator is locked to the counter. And, probably doesn't have enough
resolution anyway. So to find the 'fine tuned' frequency, one has to
use an external counter.
Szabolcs
DW <wilson2115@...> ezt ¨ªrta (id?pont: 2020. m¨¢rc. 1., V, 22:19):
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To put simply, take a function generator such as a HP 3325B, set the output to 0dBm at 10 Mhz, plug that into the reference input of the signal generator. Then if you want a frequency of 100 Mhz just dial that into the signal generator. If you desire more precision with the frequency than what the signal generator is capable of, just make very slight adjustments to the function frequency on the generator supplying the the reference 10 Mhz.
I would think this could work somewhat however it might not scale linear at the various frequencies set on the signal generator, and the phase noise would suffer. And to determine the actual frequency a frequency counter would be needed.
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Harold Foster
Dave McGuire
Michael A. Terrell
Paul Bicknell