Re: 8596E cal: not stored
Taken on ebay with battery and 0 volt supercap, even the attenuator is broken, it does not complete the amplitude calibration I think for this reason, I will have to replace it with a new one, I hope that afterwards it will be able to perform the two cals and be able to store the data calibration.
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I would like a copy also, please.
Bob K6DDX
On Saturday, February 5, 2022, 12:53:04 PM PST, N5ZTW via groups.io <n5ztw@...> wrote:
Thank you and yes I would like a copy of the service manual schematic please
Bill
On Jan 31, 2022, at 1:21 PM, sv1aku via groups.io <sv1aku@...> wrote:
Hi Bill,
see attached PSU schematic I got from a guy back in 2009 when I was trying to repair my HP 54501. I also have the 54501 schematic in PDF ( from 90903 service manual supplement)? if anybody ever? needs it.
Thanks,
Konstantinos SV1GSI
Στι? Δευτ?ρα 31 Ιανουαρ?ου 2022, 07:28:12 μ.μ. EET, ο χρ?στη? N5ZTW via groups.io <n5ztw@...> ?γραψε:
Howdy friends, I have a pair of 54503A scopes. Both had the dreaded Dallas semi Battery ram chip go bad.
I purchased a new Dallas unit and pulled the bad installed a socket and the new unit. Now The system will not boot I have garbage on the screen.
Pretty sure I must have broken an interconnect via while removing the old unit. (it did not come out as easy as I had hoped)
I have discovered the schematics for this unit are some kind of top secret as I simply can't find them. I read somewhere there is a former HP tech who works on these. Does anyone have contact information? I would like to send the main board for repair to this person if it can be done for a reasonable fee.
One unit has a bad PSU which is a poor design with the caps up against heatsinks. I replaced the puffed up caps but it looks like the bad caps took out a FET. Thanks to the member who did some reverse engineering? and provided notes I should be able to repair. In the long run I hope to simply get one to the point where I don't have to do the entire cal procedure every time I want to use it.
Thanks, Bill N5ZTW .
<supplyHP54503.pdf>
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Thank you and yes I would like a copy of the service manual schematic please
Bill
On Jan 31, 2022, at 1:21 PM, sv1aku via groups.io <sv1aku@...> wrote:
Hi Bill,
see attached PSU schematic I got from a guy back in 2009 when I was trying to repair my HP 54501. I also have the 54501 schematic in PDF ( from 90903 service manual supplement)? if anybody ever? needs it.
Thanks,
Konstantinos SV1GSI
Στι? Δευτ?ρα 31 Ιανουαρ?ου 2022, 07:28:12 μ.μ. EET, ο χρ?στη? N5ZTW via groups.io <n5ztw@...> ?γραψε:
Howdy friends, I have a pair of 54503A scopes. Both had the dreaded Dallas semi Battery ram chip go bad.
I purchased a new Dallas unit and pulled the bad installed a socket and the new unit. Now The system will not boot I have garbage on the screen.
Pretty sure I must have broken an interconnect via while removing the old unit. (it did not come out as easy as I had hoped)
I have discovered the schematics for this unit are some kind of top secret as I simply can't find them. I read somewhere there is a former HP tech who works on these. Does anyone have contact information? I would like to send the main board for repair to this person if it can be done for a reasonable fee.
One unit has a bad PSU which is a poor design with the caps up against heatsinks. I replaced the puffed up caps but it looks like the bad caps took out a FET. Thanks to the member who did some reverse engineering? and provided notes I should be able to repair. In the long run I hope to simply get one to the point where I don't have to do the entire cal procedure every time I want to use it.
Thanks, Bill N5ZTW .
<supplyHP54503.pdf>
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Re: 8596E cal: not stored
The manual says that error will occur if there aren't valid amplitude calibration values in use.? Run "CAL FREQ & AMPTD", then store.
Was your supercap defective that you replaced it?? Did you backup your correction constants first?
You probably lost your stored (and valid) amplitude calibration values when you replaced the battery and supercap, which is why it won't store just the frequency values.
-mark
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Re: HP 8648C keyboard mostly dead
Hi Kirb,
I own an HP 8648B but I don't currently have access to it, since I'm not in the lab over the weekend.
I could imagine that the attenuator stepping doesn't take place, unless the RF output is enabled, so that could explain the lack of clunking, since you can't enable the RF output.
If that is so, it could just be keyboard a problem:
The keyboard employs a selectively silverpaint-covered foil, which suffers from multiple keypressing and corrosion / air pollution, leading to interruptions.
Notwithstanding the fact that usually quite a lot of places are affected, these are really easy to repair by applying some (very little) conductive (silver containing) paint to bridge the gaps in the traces.
If this is what happened with your instrument, you'll probably see that in some areas, operating the silicone rubber keypad has caused prolonged rubbing over the conductive traces connecting the keypads (interleaved combs), even though a plastic layer should prevent that from happening.
Easy to find out (after some disassembly), easy to repair. Be careful with the conductive paint, since even an almost invisible smudge causes enough conduction to confuse the keyboard circuits.
Good luck!
Raymond
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You refer to a book but no link? or how to read it alternatively it could be uploaded as a PDF to the file section on this site ??An alternatively solution to display a diode detector on an analogue display could be HP 7563A Log Voltmeter / Amplifier, as we use one in an education lab?The 415 SWR meter dues take an EXTAL input but requires a modulated RF input ?But I think trying to use a 432 for an EXTAL input is a case of using the wrong instrument for the job ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Radu Bogdan Dicher
Sent: 04 February 2022 23:20
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP detector ? Jeff, "The guy" is asking whether you'd be willing to share directions for building a suitable detector for my initial request? :) In my book, DIY is the way, if possible. Thank you much in?advance.? ? No can do: apples vs oranges 432 uses RF thermistors, not set up for diodes.
In a message dated 2/4/2022 5:38:23 PM Eastern Standard Time, joeprice@... writes:
Hi Jeff,?
How about posting in files or here on how to build your own HF detector for HP432.?
Tnx? ? Joe? ?wa9cgz
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Re: HP 11664A Detector - DIY equivalent?
Those pics are from me.
As a detector I used Pasternack pe8000-50.
Zero Bias Detector, BNC, Positive Video Out, 0.1 MHz to 1 GHz
No longer supported.
Jos PA0AMX
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am trying to repair my 8596E, new battery and supercap, it does autocalibrate in frequency but does not do data stored (cal: data not stored), I ask if the stored should do it regardless of having autocaled in amplitude . Day and time works regularly.
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Re: HP 11664A Detector - DIY equivalent?
OK Paul- all sorted! Thanks DaveB, NZ ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Paul Bicknell
Sent: Saturday, February 05, 2022 11:52
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? Hi? ok? I made a mistake as quoted? the D when I should have quoted C ? The 11664A is up to 18 Ghz? the? 11664C is the detector adapter this allows you to use any diode detector with the scaler analyser and I have personally used this up to 75 ghz The 11664D is 26 to 40 Ghz? with? wave guide input? and I do not have any documentation on this part ? So basically we now have ( as I have just uploaded them? ) the operator and service manuals including? the CCT for the 11664 A and the C? on this site and that is all that is available at this time ? Regards Paul ? ? ? But that’s info re the home built C version, NOT the D.? Where is the data/cctry for the D version? ?I’d like to see the HP original schematic for the D version as well as? any available data re a home built version of it. DaveB, NZ ? ? ? /g/HP-Agilent-Keysight-equipment/photo/68507/806445?p=Created%2C%2C%2C20%2C2%2C0%2C0 ? hi it is in their? picture 6 number 11664 ? ? Can only see info re home built 11664C in photos section- perhaps I’m blind….? DaveB, NZ ? ? Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ? ? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
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Jeff, "The guy" is asking whether you'd be willing to share directions for building a suitable detector for my initial request? :) In my book, DIY is the way, if possible. Thank you much in?advance.? Radu, aka "the guy."?
Hi Joe!
No can do: apples vs oranges 432 uses RF thermistors, not set up for diodes.
73
Jeff
In a message dated 2/4/2022 5:38:23 PM Eastern Standard Time, joeprice@... writes:
?
Hi Jeff,?
How about posting in files or here on how to build your own HF detector for HP432.?
Tnx? ? Joe? ?wa9cgz
|
Re: HP 11664A Detector - DIY equivalent?
Hi? ok? I made a mistake as quoted? the D when I should have quoted C ? The 11664A is up to 18 Ghz? the? 11664C is the detector adapter this allows you to use any diode detector with the scaler analyser and I have personally used this up to 75 ghz The 11664D is 26 to 40 Ghz? with? wave guide input? and I do not have any documentation on this part ? So basically we now have ( as I have just uploaded them? ) the operator and service manuals including? the CCT for the 11664 A and the C? on this site and that is all that is available at this time ? Regards Paul ? ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Brown
Sent: 04 February 2022 22:03
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? But that’s info re the home built C version, NOT the D.? Where is the data/cctry for the D version? ?I’d like to see the HP original schematic for the D version as well as? any available data re a home built version of it. DaveB, NZ ? ? ? /g/HP-Agilent-Keysight-equipment/photo/68507/806445?p=Created%2C%2C%2C20%2C2%2C0%2C0 ? hi it is in their? picture 6 number 11664 ? ? Can only see info re home built 11664C in photos section- perhaps I’m blind….? DaveB, NZ ? ? Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ? ? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
|
Hi Joe!
No can do: apples vs oranges 432 uses RF thermistors, not set up for diodes.
73
Jeff
In a message dated 2/4/2022 5:38:23 PM Eastern Standard Time, joeprice@... writes:
?
Hi Jeff,?
How about posting in files or here on how to build your own HF detector for HP432.?
Tnx? ? Joe? ?wa9cgz
|
ESG-DP E4437B Signal Generation Issue
Hi all,
?
I have a problem with my E4437B that started gradually as jitter, but now just outputs white noise.? I used to repair ESG RF boards, and know the generators relatively well, but haven't seen this issue before.
I had been measuring internal stability by using my 53132A?(500KHz for best ?Hz resolution), set with an offset, and recording the resulting offset, recording a range of 1 - 15 ?Hz. Just recently, it started getting worse, and worse, and at times jumping to outrageous frequency errors.? ?However, there were no indicated errors until today.
?
?
The bandpass filters are switching properly, but show white noise covering the entire bandwidth of the filters, and the white noise levels change drastically with frequency, and am now seeing an "UNLEVEL" indication, which is likely due to to the signal generation failure.? One note, when I select 400MHz, I get a secondary output at 800MHz (-55dBm with output set at 0dBm), which attenuates severely with only a few hundred KHz change.? The high level of the 800MHz is likely due to the output board trying to ink out as much level as possible, but is not able to.
?
My first dread was that it might be the YIG, as they are such a pain, and very expensive (I don't have any experience with them, just the RF boards in the cage).? I have also been considering the U313 (1GC1-4210) Frac-N divider on the E4423-60019 SYNTH BD, which I know is a weak spot.? I haven't opened it up yet, but plan to in the next few days.? Since the YIG drives the FRAC-N board directly, I will check for a clean signal there, then at the output of the FRAC-N divider.? Fortunately, I have an E4404B spectrum analyzer, so I can look directly at the YIG output.
Fortunately, I have a couple new, but slightly damaged (scratched on top of the chip, which obliterated the part number) 1GC1-4210 replacements, as I used to repair these boards, and the regular rework person messed up a few chips with tweezers.
Thanks in advance for the help.
Tom -- KJ6SVS --
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Hi Jeff,?
How about posting in files or here on how to build your own HF detector for HP432.?
Tnx? ? Joe? ?wa9cgz
|
Re: HP 11664A Detector - DIY equivalent?
But that’s info re the home built C version, NOT the D.? Where is the data/cctry for the D version? ?I’d like to see the HP original schematic for the D version as well as? any available data re a home built version of it. DaveB, NZ ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Bicknell
Sent: Saturday, February 05, 2022 10:08
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? /g/HP-Agilent-Keysight-equipment/photo/68507/806445?p=Created%2C%2C%2C20%2C2%2C0%2C0 ? hi it is in their? picture 6 number 11664 ? ? Can only see info re home built 11664C in photos section- perhaps I’m blind….? DaveB, NZ ? ? Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ? ? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
|
Re: HP 11664A Detector - DIY equivalent?
Hi just uploaded?
HP 11664 A & C Operating & service manual including CCT uploaded to Files?
|
Re: HP 11664A Detector - DIY equivalent?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Brown
Sent: 04 February 2022 20:56
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? Can only see info re home built 11664C in photos section- perhaps I’m blind….? DaveB, NZ ? ? Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ? ? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
|
Hi Strange the 1998 catalogue dues not have the 8471? and the 2000 catalogue only has the 8471D ? BUT the 1986 catalogue? held on this site the Catalogues section ?has the 8471A on pg 564 ? Paul B ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Radu Bogdan Dicher
Sent: 04 February 2022 17:39
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP detector ? Hans - I've not been able to track down a datasheet or catalog page for the? HP 8471A. The Keysight website is typically very good at having manuals, catalogs, datasheets, etc. for?vintage HP or Agilent equipment, but for this particular one - and it's the first?time I see a broken link on that website - points to catalog pages that are missing this component. The linked catalog goes to? HP 8471D, E etc.? Greg - it doesn't have to be HP; it's just I've been told the HP is the gold standard on detectors. Which seems to be reflected in price... But really all I need is good linearity. I have a couple of detectors currently - a vintage "Telonic" that doesn't seem to be worth anything, and a AD8307 active one that's pretty good but I still don't have a solid certainty of its linearity or even suitability. So, if another brand is known to be good (linear and reliable) but less glittery than HP and therefore can be had for less, I'd be interested in hearing about that.? For instance, Wavetek has a detector which may fit the bill (D-152), but I haven't seen one for sale anywhere currently.? ? On Fri, Feb 4, 2022 at 8:44 AM Greg Muir via <big_sky_explorer=[email protected]> wrote: Does it have to be HP?? For the frequency range that you are dealing with HP detectors seem to be a little overkill.? There are plenty of other manufacturers whose offerings would fit your needs at a much lower price especially if found on that auction site.? And many of them offer frequency ranges up to 10 GHz or more. ? I have even found detectors installed on RF transmission line directional couplers from old broadcast transmitters that were heading for the scrap yard, were of major manufacture and swept out to 8 GHz.? The price was free. ? Greg
|
Re: HP 11664A Detector - DIY equivalent?
Can only see info re home built 11664C in photos section- perhaps I’m blind….? DaveB, NZ ?
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Paul Bicknell
Sent: Saturday, February 05, 2022 09:42
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ? ? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
|
Re: HP 11664A Detector - DIY equivalent?
Hi look in the ?photos on this site and you will have the 11664D admittedly not that good but also a new design based on modern components Paul B ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Dave Brown
Sent: 04 February 2022 20:29
To: [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent?? 11664D schematic somewhere? The manual in? files section of grps io is ops only, no ccts. DaveB, NZ ? ? I have done as Jeff described a number of times to get someone a working scaler analyser I use the 11664 C detector adapter for frequencies above 18 Ghz? so if you are making an adapter without using an old 11664 then the circuit used in the D version is actually better and easier to configure to different detectors ? Also I have seen possibly on this site a modern board lay out using modern components Paul B ? From: [email protected] [mailto:[email protected]] On Behalf Of Jeff Kruth via groups.io
Sent: 04 February 2022 09:15
To: tonycox01@...; [email protected]
Subject: Re: [HP-Agilent-Keysight-equipment] HP 11664A Detector - DIY equivalent? ? Yes, I have. Polarity of detector doesnt matter, as the signal is chopped at 27.8 KHz. Best bet is get a blown detector then remove the detector bulkhead and fashion a small aluminum sheet metal plate to hold a BNC, replacing the bulkhead with this. It is the same as an HP11664C detector adapter. Easy-peasy. Works great.
In a message dated 2/4/2022 3:52:30 AM Eastern Standard Time, tonycox01@... writes:
Hi,
I've been looking for a couple of HP 11664 detectors for a network analyser but was put off by the sky high price - even for second hand items of dubious condition.
I've seen a web page showing a DIY equivalent using a?33330B?(positive)?detector and an amplifier replicated from the HP service manual.I was wondering if this is a sensible/realistic thing to attempt? Has anybody ever tried this?
thanks
Tony
|
Paul Bicknell
Jos Raven PA0AMX