hp 5100A /5110A synth set Spectrum Generator
Hi:
As an alternative to using a Step Recovery Diode to generate the harmonics it may be possible to use a modified A45 Module from a PRC-77 military radio. The A45 Module is called "One-megacycle spectrum generator" and uses a PNP 2N2273 transistor to generate the harmonics with a fairly simple circuit powered by +10 Volts. In the theory of operation TM 11-5820-667-35 pg 2-22.3 "The sinusoidal 1-mc oscillations are applied to spectrum generator Q2 (2N2273) through coupling capacitor C3 (10 uuF) . The spectrum generator is normally cut off by the reverse base bias applied through R4 (19k), and conducts only on the negative half cycles of the 1-mc signal. A positive pulse, rich in harmonics, is developed across transformer T2 and coupled to first mixer module A44.
This might be an excellent replacement for the impossible to get SRD.
73,
Brooke Clarke, N6GCE
|
Any of you have an user manual of this machine? o just know the pinout
of 50 pins conection, pin to pin, crosed...
|
Hi Morris, i have copied the manual for the 5100A, except the parts list, which was missing in my copy, too. I send it tomorrow. With that, i send you two BA243S Switching Diodes which snaps well. But compared to a "true" HP-SRD (My spare for the Clock-Circuit in my 5360A) it has about half the spike-voltage, but still a lot more than some other switching and tuning diodes. If you have any junk tv-tuner, best from the mid 70's (pre PLL-Age), pull out all diodes and test them, maybe you find a good working one before my arrives. Maybe you have to fiddle with the bias voltage (resistor), too. Most other diodes doesn't snap either. Maybe the pulse is too low for the following stages? Or the driving power is too low? The snappys want power! And they can widhstand a lot! Don't be shy! ;-) I will measure the pulse voltage and some other interesting voltages in that stage in our 5110A, but not before Wednesday of the next week, due to our pentecost-weekend fieldday which starts tomorrow, and i have a lot to organize this day and tomorrow and still after the FD. ...Dry the tents, repair the generator, ... and so on :-( ;-) Jorgen dj0ud --- In hp_agilent_equipment@..., "morriso2002" <morriso@v...> wrote: Hi all,
I have been working on a 5110A synth driver with a problem of no
output. After getting a manual I diagnosed a failure of the Step
Recovery Diode in the harmonic generator and sure 'nough, it's open
circuited. (Why is it always these rare parts that fail - SRDs,
tunnel diodes , avalanche transistors...Murphy's list goes on and
on...)
Following advice on this list, I tried several diodes using clip-
leads. I was able to get nice spikes from a couple of different low
freq tuning diodes but still no output from succeeding stages.
The best result is with an unlabelled miniature tuning diode which
gives positive going spikes 30 nS wide and 1 volt in amplitude at the cathode of the diode. These parameters would improve further if the
diode was properly mounted on the PCB. After passing through the HP
filter network however there is nothing visible at the emitter of the pulse amplifier transistor and no output. The transistor is a zero
biased common base connected 2N1143 which is a Ge pnp with a Ft of
200 MHz - another unobtainable Murphy favourite :-( Removing it for
testing requires messy surgery.
Any ideas? Have any of the mavens here actually measured the pulse
parameters in this circuit? Is the transistor faulty or is there just not enough drive to the amplifier? Unfortunately the manual is silent on the subject.
On the bright side, I'm learning a lot (small consolation).
Any help appreciated,
Morris
|
Hi all,
I have been working on a 5110A synth driver with a problem of no
output. After getting a manual I diagnosed a failure of the Step
Recovery Diode in the harmonic generator and sure 'nough, it's open
circuited. (Why is it always these rare parts that fail - SRDs,
tunnel diodes , avalanche transistors...Murphy's list goes on and
on...)
Following advice on this list, I tried several diodes using clip-
leads. I was able to get nice spikes from a couple of different low
freq tuning diodes but still no output from succeeding stages.
The best result is with an unlabelled miniature tuning diode which
gives positive going spikes 30 nS wide and 1 volt in amplitude at the
cathode of the diode. These parameters would improve further if the
diode was properly mounted on the PCB. After passing through the HP
filter network however there is nothing visible at the emitter of the
pulse amplifier transistor and no output. The transistor is a zero
biased common base connected 2N1143 which is a Ge pnp with a Ft of
200 MHz - another unobtainable Murphy favourite :-( Removing it for
testing requires messy surgery.
Any ideas? Have any of the mavens here actually measured the pulse
parameters in this circuit? Is the transistor faulty or is there just
not enough drive to the amplifier? Unfortunately the manual is silent
on the subject.
On the bright side, I'm learning a lot (small consolation).
Any help appreciated,
Morris
|
Hello Henry,
Take the coversm off of the 8750A and look and see if the other interface board is attached to the bottom of one of the covers. The standard unit comes with two interface boards and you may find the spectrum analyzer board
inside. I have two or three of these and all of them have a complete complement of cards so you have a chance at finding the one that you need for the 141.
Also I have used the GLK cables and they work quite well. You could buy the parts at one time from Newark Electronics and make it yourself but if you don't have the crimping tools for the coaxial connectors it's not worth
the effort since the component parts are not cheap either especially if you mess some up trying to make the cable.
Good luck and let us know how you made out.
Sam
W3OHM
hp_agilent_equipment@... wrote:
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Show quoted text
There are 4 messages in this issue.
Topics in this digest:
1. HP 8750A normalizer on 141T ?
From: "Henry Kolesnik" <kolesnik@...>
2. RE: HP 8750A normalizer on 141T ?
From: "John Miles" <jmiles@...>
3. Re: HP 8750A normalizer on 141T ?
From: "Henry Kolesnik" <kolesnik@...>
4. Anybody have HPIB codes for 5005B Signature Multimeter?
From: leedyt@...
________________________________________________________________________
________________________________________________________________________
Message: 1
Date: Mon, 24 May 2004 13:19:59 -0500
From: "Henry Kolesnik" <kolesnik@...>
Subject: HP 8750A normalizer on 141T ?
Can the HP 8750A normalizer be used with the HP 141T? If so what kind of interface and cable is required. I have both but no interfaces or cables.
tnx
Hank WD5JFR
[This message contained attachments]
________________________________________________________________________
________________________________________________________________________
Message: 2
Date: Mon, 24 May 2004 11:25:15 -0700
From: "John Miles" <jmiles@...>
Subject: RE: HP 8750A normalizer on 141T ?
Cables can be obtained from .
There will be some sticker shock involved.
I believe there is also a "personality module" involved that configures the
8750A for either the 8505A or 141T. The cable alone might not be enough;
you should ask George about this if you contact him re: the cable.
-- john KE5FX
-----Original Message-----
From: Henry Kolesnik [mailto:kolesnik@...]
Sent: Monday, May 24, 2004 11:20 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP 8750A normalizer on 141T ?
Can the HP 8750A normalizer be used with the HP 141T? If so what kind of
interface and cable is required. I have both but no interfaces or cables.
tnx
Hank WD5JFR
----------------------------------------------------------------------------
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[This message contained attachments]
________________________________________________________________________
________________________________________________________________________
Message: 3
Date: Mon, 24 May 2004 13:52:47 -0500
From: "Henry Kolesnik" <kolesnik@...>
Subject: Re: HP 8750A normalizer on 141T ?
Mine has the network analyzer interface that I failed to mention. I did see the prices and on the glkinst site and I can't justify them.
73
Hank WD5JFR
----- Original Message -----
From: John Miles
To: hp_agilent_equipment@...
Sent: Monday, May 24, 2004 1:25 PM
Subject: RE: [hp_agilent_equipment] HP 8750A normalizer on 141T ?
Cables can be obtained from . There will be some sticker shock involved.
I believe there is also a "personality module" involved that configures the 8750A for either the 8505A or 141T. The cable alone might not be enough; you should ask George about this if you contact him re: the cable.
-- john KE5FX
-----Original Message-----
From: Henry Kolesnik [mailto:kolesnik@...]
Sent: Monday, May 24, 2004 11:20 AM
To: hp_agilent_equipment@...
Subject: [hp_agilent_equipment] HP 8750A normalizer on 141T ?
Can the HP 8750A normalizer be used with the HP 141T? If so what kind of interface and cable is required. I have both but no interfaces or cables.
tnx
Hank WD5JFR
----------------------------------------------------------------------------
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b.. To unsubscribe from this group, send an email to:
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[This message contained attachments]
________________________________________________________________________
________________________________________________________________________
Message: 4
Date: Mon, 24 May 2004 22:55:32 EDT
From: leedyt@...
Subject: Anybody have HPIB codes for 5005B Signature Multimeter?
I am looking for the HPIB (IEEE-488) commands for a 5005B Signature
Multimeter. Usually, summaries of these codes are given on one page of the manual.
Any help would be appreciated!
Tom Leedy
Clarksburg, MD 20871
leedyt@...
[This message contained attachments]
________________________________________________________________________
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|
Anybody have HPIB codes for 5005B Signature Multimeter?
I am looking for the HPIB (IEEE-488) commands for a 5005B Signature Multimeter.? Usually, summaries of these codes are given on one page of the manual.? Any help would be appreciated!
Tom Leedy
Clarksburg, MD 20871
leedyt@...
|
Re: HP 8750A normalizer on 141T ?
Mine has the network analyzer interface that I
failed to mention.? I did see the prices and on the glkinst site and I
can't justify them.
?
73
Hank WD5JFR
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Monday, May 24, 2004 1:25 PM
Subject: RE: [hp_agilent_equipment] HP
8750A normalizer on 141T ?
Cables can be obtained from??.?
There will be some sticker shock involved.
?
I
believe there is also a "personality module" involved that configures the
8750A for either the 8505A or 141T.? The cable alone might not
be?enough; you should ask George about this if you contact him re: the
cable.
?
--
john KE5FX
Can the HP 8750A normalizer be used with the HP
141T?? If so what kind of interface and cable is required.? I have
both but no interfaces or cables.
tnx
Hank WD5JFR
|
Re: HP 8750A normalizer on 141T ?
Cables
can be obtained from??.?
There will be some sticker shock involved.
?
I
believe there is also a "personality module" involved that configures the 8750A
for either the 8505A or 141T.? The cable alone might not be?enough;
you should ask George about this if you contact him re: the
cable.
?
--
john KE5FX
toggle quoted message
Show quoted text
Can the HP 8750A normalizer be used with the HP
141T?? If so what kind of interface and cable is required.? I have
both but no interfaces or cables.
tnx
Hank WD5JFR
|
HP 8750A normalizer on 141T ?
Can the HP 8750A normalizer be used with the HP
141T?? If so what kind of interface and cable is required.? I have
both but no interfaces or cables.
tnx
Hank WD5JFR
|
Another go...parts needed
Hello again group,
I am again asking if anyone has, or knows of any HP 4260A Universal
Bridge units for sale, parts for sale or where I might find them.
I have an HP 4260A that needs the main rotating resistor (R3 - part
number 0428-7025), but is in otherwise good condition.
Thanks for any help,
Rod.
|
Opps, sorry about that. I meant to reply privately and sent to the list instead. Looks like I have done that more than once. Aside from that, thanks to everyone who responded, on and off list, to my introduction. The comments and suggestions were helpful and are appreciated. Finally, I found a documentation source which I don't recall seeing mentioned before -- . I was about to purchase something but had a question. I sent an email, but received no response. Does anyone know anything about this outfit? Jack Jack Crone wrote: Hi Robert,
I got out the 140A and found it to not be worth fooling with. The top, bottom, and one side cover are missing along with both handles. It looks like it was being used for parts to repair other units. The plugins do seem ok, but I can't test them without the 140A. Both plugins are now on eBay, auctions 3817471981 and 3817472794. I'll give you a report on the 851B when I get to it. <snip>
|
Hi Robert,
I got out the 140A and found it to not be worth fooling with. The top, bottom, and one side cover are missing along with both handles. It looks like it was being used for parts to repair other units. The plugins do seem ok, but I can't test them without the 140A. Both plugins are now on eBay, auctions 3817471981 and 3817472794. I'll give you a report on the 851B when I get to it.
Best wishes,
Jack
Robert Middleton wrote:
toggle quoted message
Show quoted text
Hello Jack.
Thank you for getting back to me. I could be interested in the 140A and also the 851B. Is there a possibility that you could send some photos of both? When your time permits please let me know.
Also, when you do happen to run accross any of the military versions that I have mentioned in my e-mail, (heavy rascals!). Thanks for your time and for your efforts and you and yours have a great day.
Respectfully, Robert
----- Original Message -----
*From:* Jack Crone <mailto:jcrone@...>
*To:* hp_agilent_equipment@...
<mailto:hp_agilent_equipment@...>
*Sent:* Sunday, May 16, 2004 7:56 PM
*Subject:* Re: [hp_agilent_equipment] Introduction
Hi Robert,
I have two HP scopes. One is a 130C, which I will probably keep, at
least for now. The other is a 140A with 1405A and 1420A plug ins. I
will
sell the 140A but at this time I have no idea what condition it is in,
either cosmetically or functionally. If you are interested in the 140A
let me know and I will check it out and get back to you.
I also have an 851B Spectrum Analyzer Display, but I only have the
display, not the rest of the unit. I will probably scrap the 851B for
parts so if you need any knobs or other scope parts contained in the
display unit I might be able to help you.
With best wishes,
Jack
===================================
JD Crone Associates, LLC
Computer Forensics - Data Recovery
5534 South Sixth Street #120
Klamath Falls, OR 97603
Voice: 626.441.8441
Fax: 626.441.6425
===================================
Robert Middleton wrote:
> Hello Jack.
> This is Robert. I have a list of H.P. Oscilliscopes I am looking
for.
> Perhaps you might have a few of them or perhaps you could point
me in
> the direction of where I can locate them? Enclosed is my list and
I will
> keep an eye out for manuals you need. Thanks.
> Respectfully, Robert
> p.s. Below is my list of H.P. oscilliscopes;
> OS-121A/USM-140
> OS-82A/USM-105
> OS-121C/USM-140
> OS-121D/USM-140
>
> ----- Original Message -----
> *From:* Jack Crone <mailto:jcrone@...>
> *To:* hp_agilent_equipment@...
> <mailto:hp_agilent_equipment@...>
> *Sent:* Thursday, May 13, 2004 10:07 PM
> *Subject:* [hp_agilent_equipment] Introduction
>
> Greetings All,
>
> I am a new member of the group and am looking forward to an
enjoyable
> time here.
>
> I have a large inventory of HP boat anchors which I want to
dispose of.
> Some I want to sell as functional units, others might get
parted out if
> there is any market for these parts. There are over 60 units
consisting
> of these models: 130C, 140A, 1900A, 200CD, 214A, 302B, 342A,
400D,
> 400H,
> 411A, 415B, 428A, 431B, 5210A, 523C, 606A, 608C, 608D, 612A,
614A,
> 616A,
> 618B, 626A, 694A, 851B, 8690A, and probably a few others.
>
> Any suggestions for disposing of this would be appreciated. I
also need
> manuals for most models and there are just too many to buy
them. I
> think
> that there are downloadable manuals for the equivalent
military units
> but I don't know the military model numbers. Is there a cross
reference
> list available?
>
> Thanks,
>
> Jack
>
>
>
> *Yahoo! Groups Sponsor*
> ADVERTISEMENT
>
<>
>
>
>
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hi all
looking for replacement timebase switch inserts
analog,sweepdelay and main timebase
(the black switch contact assembly with the contacts that break off
all the time)
any idears
regards eric
|
Chicago - vintage test gear sale
I've sen this info info on some other lists-
not seen it here as yet.
Lots of older HP stuff in the pix.
Saturday May 22, 2004 from 9 AM to 2 PM
Details and map at
73,
Dave, ZL3FJ (who's positively green with envy-we never get this sort of sale
down here!)
|
Re: hp 5100A /5110A synth set
Hi:
I joined this group on the 17th and asked for a daily digest, but none
have arrived, so have missed a few postings.
I repaired my synth many years ago by replacing the SRD with the
biggest slowest one I could find. But it has died again.
The problem is in getting a SRD with a lifetime that's long enough to
work with a 1 MHz input signal. Since diode lifetime goes up with
temperature, HP used a heater to increase the lifetime and thus get a
stronger set of combs out of the diode.
The idea is that during fordward conduction the diode stores charge
and when the input polarity reverses the diode keeps conducting
(because of the stored charge). When the stored charge is all removed
the diode "snaps" to the reverse voltage. In the ideal case the
stored charge runs out when the reverse voltage is at it's negative peak.
In this case that would take a huge amount of charge storage and so
it's a case of the more charge the higher the output.
If someone knows of a large long lifetime SRD (or it may be called a
fast PIN, or noise diode) that may be a good choice.
Have Fun,
Brooke Clarke, N6GCE
|
Re: hp 5100A /5110A synth set
--- In hp_agilent_equipment@..., Morris Odell <morriso@v...> wrote: Hi Jorgen,
Hi Morris, i need your adress. please mail it to me to dj0ud at web dot de (at=@; dot =.) Jorgen
|
Re: hp 5100A /5110A synth set
|
Re: hp 5100A /5110A synth set
--- In hp_agilent_equipment@..., Morris Odell <morriso@v...> wrote: Hi Jorgen,
have a manual for the driver coming from ebay so will look into it
properly when I have the information I need.
I'm sure a new SRD will be impossible to find :-( I may have to find
some other way to generate harmonics....it can't be that hard with 21st
century ICs. Because of it hasn't to be a microwave SRD (as in the most other cases of SRD-use) i think it is possible to substitute it with other types of diodes which also "snap", but unwanted, or better said, not build for to be a SRD. A BA244 Tuner Switching Diode will work well. A few years ago i have "Measured" (Not a perfect measurement, fast thrown together) a step with a slew that nearly matched the rise time of the scope (Tek 2465B, 400MHZ) so that i think it will do a nice job in there. if it is not available down under, i send together with the Manual. I have
the Manuals for those both units at our Ham-Radio
clubstation. I have to look there in the next days. Is it possible to get a copy of the 5100A manual? All costs covered of
course...
I will take a look in our clubstation the next days for it, i think it is possible. Jorgen
|
The service manual arrived today and it answered my question. The unit must be zeroed each time it is turned on. Thanks BL --- In hp_agilent_equipment@..., "computeruser04" <computeruser@s...> wrote: The HP 3439A has been repaired. It was C8 on A9 that had failed.
I then zeroed the readout it using a calibration procedure found at
.
Thanks to everyone who replied. I also have a service manual
on the way to me from Joe VE7LBI.
Question - I zero the readout after a 30minute warmup. All ranges
read 0000 with the + & - flashing alternately. The Int Check -8000
is also set per the precedure. It will stay like that (zeroed) all
day. If I turn it off then back on the next day - the zero
calibration is off - not by much - sometimes +0001 or -0002. I can
zero it again - and it will stay like that all day. Is this normal
or am I being anal about a +35 year old instrument?
Thank
BL
--- In hp_agilent_equipment@..., "computeruser04"
<computeruser@s...> wrote:
Hello All
I was just given an old HP 3439A Digital Voltmeter to play with.
It has the 3443 High Gain/Auto Range plugin. The Nixie tubes
light but display random digits. I have searched for a schematic
and found nothing. Really, like others have said here before, its
the challenge to see if I can get it functioning, so any info about it is appreciated.
Thanks
BL
|
Re: hp 5100A /5110A synth set
PS.No reply from Jose,will send another message.BG. Jose replied to me yesterday after seeing the above. It seems he is just
as disorganised as the rest of us.
Well, no so... at least I recalled your message was somewhere in the pile of unanswered ones ;-)! Sorry for the delay! Regards, JOSE PS to BG: I think I will get the Eddy :-)! ---------------------------------------------------------------------- 73 EB5AGV / EC5AAU - JOSE V. GAVILA La Canyada - Valencia (SPAIN) - Loc: IM99SM Vintage Radio: Vintage Test Equipment: European Boatanchors List:
|
