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File /All HP, Agilent and Keysight instruments in folders by part numbers/3000 to 3999/3724A 25A 26A Baseband Analyzer/3724A 3725A 3726A Operating Only SN 2037U May 1981 03724-90001 91 Pages.pdf uploaded
#file-notice
The following items have been added to the Files area of the [email protected] group.
By: Charles Edmonds <charles.edmonds@...>
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If you need a very low band source below 10 MHz, you could conceivably use one of these heads with a high impedance buffer amplifier. That would take care of the LF roll-off from the coupling cap. You'd need to account for the gain scaling and additional noise of the amplifier of course, but it should be straightforward. Down at the low frequencies you won't be worried about impedance matching at the input, just straight voltage gain (like unity), and let the output take care of matching to 50 ohms or whatever.
?
A simple emitter follower or JFET follower or totem-pole (or even an opamp) should easily perform the Z transformation over reasonable bandwidth. Depending on circuit design, you'll still probably have an output coupling cap, but you can make it as big as you want. With opamp circuits, you can go with DC output coupling to get way down, leaving only the input side to limit the LF response.
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With these 34X noise sources, I think it's only one stage, with a noise (avalanche) diode and coupling network, so probably only one dominant capacitor for the low end.
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Ed
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346 noise sources are not really usable below 10 MHz. The match becomes very bad due to a d.c. block between the noise diode and output attenuator. So, even if you characterized the noise that does make it through the capacitor, you would be dealing with a bad return loss.
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Vladan
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Re: Anyone got documents for these instruments?
Older HP instruments with 3xxx in the number, e.g. 3724 Baseband Analyser, ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? Regards Brad?
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I'll put it on my list of things to do after I finish cleaning up from hurricanes Helene and Milton. I'm pretty sure I have manuals and other documents for both the 436A and the 415E. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
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On Oct 14, 2024, at 17:43, Dr. David Kirkby, Kirkby Microwave Ltd via groups.io <drkirkby@...> wrote:
? Isn't there a 436A power meter? I don't see an entry for that. Perhaps I've missed it.
Yes, it would appear there is. Do you want to volunteer to create the directory and upload what information you have about it? ?
Dave
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Isn't there a 436A power meter? I don't see an entry for that. Perhaps I've missed it.
Yes, it would appear there is. Do you want to volunteer to create the directory and upload what information you have about it? ?
Dave
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I also don't see an entry for the 415E SWR meter. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994)
==============================
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On Oct 14, 2024, at 17:31, Dave Daniel <kc0wjn@...> wrote:
? Isn't there a 436A power meter? I don't see an entry for that. Perhaps I've missed it. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ============================== On Oct 14, 2024, at 17:19, Dr. David Kirkby, Kirkby Microwave Ltd via groups.io <drkirkby@...> wrote:
? This is the directory all those hyperlinks will point to.
Do you know of other instruments that should be here? If so, please create a directory with a model number (don't put HP) and a description of the instrument.
The Wiki is here
The wiki page Home has been updated by Dr. David Kirkby, Kirkby Microwave Ltd <drkirkby@...>.
Reason: Added entries into the wiki for any instruments with a model number of under 1000. The last is the 974A digital multimeter. These have hyperlinks to the directories containing the information we have. Not every instrument is listed though. ARE PEOPLE AWARE OF OTHER INSTRUMENTS WITH MODEL NUMBERS FROM 1-999 THAT ARE NOT HERE??
Compare Revisions
Dr David Kirkby Ph.D Kirkby Microwave Ltd Email: drkirkby@... Web: Telephone 07910 441670 (UK) or +44 7910 441670 (international) Registered in England and Wales, company number 08914892.? Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT
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Isn't there a 436A power meter? I don't see an entry for that. Perhaps I've missed it. DaveD KC0WJN
Thanks for all the fish.
============================== All spelling mistakes are the responsibilty of the reader (Rick Renz, STK, ca. 1994) ==============================
toggle quoted message
Show quoted text
On Oct 14, 2024, at 17:19, Dr. David Kirkby, Kirkby Microwave Ltd via groups.io <drkirkby@...> wrote:
? This is the directory all those hyperlinks will point to.
Do you know of other instruments that should be here? If so, please create a directory with a model number (don't put HP) and a description of the instrument.
The Wiki is here
The wiki page Home has been updated by Dr. David Kirkby, Kirkby Microwave Ltd <drkirkby@...>.
Reason: Added entries into the wiki for any instruments with a model number of under 1000. The last is the 974A digital multimeter. These have hyperlinks to the directories containing the information we have. Not every instrument is listed though. ARE PEOPLE AWARE OF OTHER INSTRUMENTS WITH MODEL NUMBERS FROM 1-999 THAT ARE NOT HERE??
Compare Revisions
Dr David Kirkby Ph.D Kirkby Microwave Ltd Email: drkirkby@... Web: Telephone 07910 441670 (UK) or +44 7910 441670 (international) Registered in England and Wales, company number 08914892.? Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT
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HP8591C - CCTV/SPECTRUM ANALYSER FOR SALE - (UK) - Please read details below
Cosmetically in A1 condition apart from Handle missing.
All option cards have been removed, so it is in effect just a spectrum analyser now.
The internal 10MHZ Reference oscillator board has also been removed.
When powering up, it indicates a sampler fault. (nothing to do with missing osc module).
The display is perfect.
Located in Cardiff, uk, and would rather collection from me, i simply dont trust couriers with CRT instruments.
Ideal for a project or for spares.
?150
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This is the directory all those hyperlinks will point to.
Do you know of other instruments that should be here? If so, please create a directory with a model number (don't put HP) and a description of the instrument.
The Wiki is here
The wiki page Home has been updated by Dr. David Kirkby, Kirkby Microwave Ltd <drkirkby@...>.
Reason: Added entries into the wiki for any instruments with a model number of under 1000. The last is the 974A digital multimeter. These have hyperlinks to the directories containing the information we have. Not every instrument is listed though. ARE PEOPLE AWARE OF OTHER INSTRUMENTS WITH MODEL NUMBERS FROM 1-999 THAT ARE NOT HERE??
Compare Revisions
-- Dr David Kirkby Ph.D Kirkby Microwave Ltd Email: drkirkby@... Web: Telephone 07910 441670 (UK) or +44 7910 441670 (international) Registered in England and Wales, company number 08914892.? Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT
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The wiki page Home has been updated by Dr. David Kirkby, Kirkby Microwave Ltd <drkirkby@...>.
Reason: Added entries into the wiki for any instruments with a model number of under 1000. The last is the 974A digital multimeter. These have hyperlinks to the directories containing the information we have. Not every instrument is listed though. ARE PEOPLE AWARE OF OTHER INSTRUMENTS WITH MODEL NUMBERS FROM 1-999 THAT ARE NOT HERE??
Compare Revisions
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? Hi, ? I made a simulation on LTSpice, but also an assembly with 2N3904 transistors, in order to study the behavior of this circuit. ? It is mandatory that the signal at pin#2 and pin#3 are present and identical to activate the internal transistor which serves as a switch. If you have a signal at pin#3 but nothing or DC at pin#2, you would have nothing at pin#10 and #11 output and this is normal. ? The HSPU signal (if I read the name correctly), is the signal responsible for the control (page 302/576 service manual). This signal cuts the signal source for pin #2 of U203, because transistor Q202 blocks the current source, and the control signal also goes to R125-Q216 PNP transistor to allow the correct DC level to be adjusted at pin#2 of U203. So, when the HSPU signal is at logic 0 or 0Vdc, U203 becomes OFF state mode and there is no output at pins 10 and 11. ? Here is the result of a hardware test at lower frequency. ? If the UPA104G is OK, then either the DC bias is incorrect, or the pin#2 signal is not present and equal to the pin#3 signal. ? Yves ? ? I tried swapping over the UPA104, UPA102, transistor, and the LM324 from the other board. None of them made any difference to the fault. Sorry no component designations as they are unreadable on this schematic.? Pulse from the timing board goes into pin3 of the upa104 on the transducer board... and nothing comes out on pins 10 & 11. But it isn't the upa104 or related components.?
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I tried swapping over the UPA104, UPA102, transistor, and the LM324 from the other board. None of them made any difference to the fault. Sorry no component designations as they are unreadable on this schematic.?
?
Pulse from the timing board goes into pin3 of the upa104 on the transducer board... and nothing comes out on pins 10 & 11. But it isn't the upa104 or related components.?
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Grrrrrr! ?
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The 8568B was very deeply "stuck" in a shelf. I spent several hours trying to get it out.?
Finally, I discovered the problem: a bad contact in the AC power cord of the 85662....
More hours to put everything back in place....
But I am happy, though! :)
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Re: Anyone got documents for these instruments?
There were no technical manuals for the Fieldfox series that I know of.? In addition, many of the frequency differences were just a bit flip...so a 14 GHz model is identical to the 26.5 GHz model (except for the model nameplate.)
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Anyone got documents for these instruments?
We appear to have no documentation for the instruments listed below - or if we do, it is not obvious where it is. Do you have any?
Plus loads more FieldFox instruments. Manuals might be common to some, in which case we can put them in one place and link.
Any instrument with 2xxxx in the part number. Are there any?
We have very few (8) instruments with 3xxxx in the part number. See all at
We only have a few instruments with 4xxxx in the part number. The following directory exists, but has nothing in it.
Any instruments with 9xxxx in the part number. Were any made?
-- Dr David Kirkby Ph.D Kirkby Microwave Ltd Email: drkirkby@... Web: Telephone 07910 441670 (UK) or +44 7910 441670 (international) Registered in England and Wales, company number 08914892.? Registered office: Stokes Hall Lodge, Burnham Rd, Althorne, Essex, CM3 6DT
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Re: HP 8510C - 8514B Test Set Option 001
Update: I found some details in the 8515A manual and it looks like I
need the A4 IF Multiplexer board and the cable harness.
Manual shows around 16 connections for Option 001 but not sure how are
those done.
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On 14/10/2024 10:42, Razvan Popescu via groups.io wrote: Hello,
Does anyone have an 8514B Test Set with Option 001 and can take some
pictures with the internal connections of the J10 port?
I have 2 pieces 8514B that have Option 002 and the other one Option 002
and 003. I wanted to interconnect them and use both but apparently you
need Option 001 to do that.
I checked the J10 connector and it has only a few wires for the bottom
row connected and it is missing all coax pins.
I would like to retrofit one of them and add Option 001 but I cannot
find any info in the manuals about it except external interconnection
diagrams.
Maybe someone can take some pictures to see if it is doable and start to
shop for the missing parts.
Many thanks in advance!
Razvan
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HP 8510C - 8514B Test Set Option 001
Hello,
Does anyone have an 8514B Test Set with Option 001 and can take some
pictures with the internal connections of the J10 port?
I have 2 pieces 8514B that have Option 002 and the other one Option 002
and 003. I wanted to interconnect them and use both but apparently you
need Option 001 to do that.
I checked the J10 connector and it has only a few wires for the bottom
row connected and it is missing all coax pins.
I would like to retrofit one of them and add Option 001 but I cannot
find any info in the manuals about it except external interconnection
diagrams.
Maybe someone can take some pictures to see if it is doable and start to
shop for the missing parts.
Many thanks in advance!
Razvan
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Dr. David Kirkby, Kirkby Microwave Ltd
