Hello Group:
I started a collection of Tektronix gear but have developed an interest in HP's assortment of spectrum analyzers. The 141T seems to offer the biggest variety and seems to be readily available on eBay. I'm interested in general comments about these instruments. Are they servicable, are parts generally available in generic form? Any recommendations?
Thanks for your comments.
George Headley
Atlanta
Sign up for Internet Service under $10 dollars a month, at
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Manual or any info wanted
Howdy all-
I'm looking for a service manual or schematic diagram for the HP 233A
audio oscillator.
Any help greatly appreciated.
Thanks!
Regards,
Vollumscope
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Hi All,
I have a 652a (s.n. 826-01432) that has output level problems but
only at a very specific range of frequencies. On the x10 range from
~40Hz to ~75Hz, the output level seems to be modulated by another
signal. I thought it may have to do with ripple on one of the
supplies but everything looks clean. The level between 40Hz and 75Hz
will swing virtually full scale on the meter at some frequencies but
is relatively stable at 60Hz. On all of the other ranges, it's fine.
I've downloaded a manual from BAMA but it's for the newer model and
the boards are different. If someone has seen this problem and can
point me in the right direction or knows where I can get an older
service manual, I'd appreciate the help.
Thanks
PB
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Hello all,
I am after a working or otherwise HP4260A unit. I have one in good
condition except for the large rotating resistor (R3).
If you have one of these units, or know of one somewhere, I would
like to know about it.
Thanks
Rod.
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USM-323 HP8640M manual wanted
Hi Gang, Some more info has become available. It appears that it is not called the HP8640M. The correct name is the USM-323. Anyone have one of these? 73 Ray vk2ilv Roger said: the opt.323 is not the same as the 8640M.
I have both manuals, but i still don't have the manual for the Opt.323 Ray said: I need an HP8640B opt323 manual to fix my generator.
I was told the manual is called an HP8640M for military.
I've tried LOGSA and watched ebay for over a year, but nothing.
The HP8640A and B manuals are some help,
but there are some differences in the counter,
and thats where my problem is.
If you know where I can fnd one,
please let me know.
All costs reimbursed.
Regards
Ray vk2ilv
|
HP54503A DSO Main Board Repair
Hello Group,
I have a pristene 54503A DSO with a problem in the Horizontal
timebase.
It fails with many codes mostly related to the trigger area. I
could supply the codes on request. Does anyone out in the ether have
any experience fixing these boards? I have the HP service manual but
as you probably know there are no schematics in the manual. If anyone
has them I would like to get a set. As far as getting the unit
repaired externally it most likely is not worth it since when HP last
had exchange boards they wanted way more than what the scope is worth
these days.
I would like to put it to use in my ham shack.
Thanks to all,
Sam
W3OHM
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--- In hp_agilent_equipment@..., "Jorgen Lund-Nielsen" <dj0ud@w...> wrote: Hi Jorgen, I repaired it today. The knob was broken from the inside and pieces of plastic limited its movement. I had a hard time with pulling it from the spindle as someone else had already tried to repair it using glue.... Michal Hi Michal,
i didn't knew the 8569, but be very careful with the knob,
make sure that there is no slight defect in the switch
which is probably repairable. if you use some force and
some parts broke (-maybe more than yet) than you have big problems.
i have heared about that, that hp plastic parts get very
brittle with the time, so be careful!
Jorgen
--- In hp_agilent_equipment@..., "michalvanka"
<michalvanka@y...> wrote:
Hi all,
Is here someone kind enough to help me with
my HP8569B? I got it today and I am little
confused with frequency span button.
Although it is marked up to 500MHz I can not
set it to span greater than 10 MHz. It seems that
it is somehow mechanically blocked, there is a
small plastic rod going from analyzer's front
panel towards the span knob and ending inside it.
I did little research and figured out that this
rod is actually the thing that blocks the span button
from being turned further than to 10MHz span.
Shall I press something or do some other action to
disable that blocking?
Thanks for any advice.
Michal Vanka
|
Hi Michal,
i didn't knew the 8569, but be very careful with the knob,
make sure that there is no slight defect in the switch
which is probably repairable. if you use some force and
some parts broke (-maybe more than yet) than you have big problems.
i have heared about that, that hp plastic parts get very
brittle with the time, so be careful!
Jorgen
--- In hp_agilent_equipment@..., "michalvanka"
<michalvanka@y...> wrote:
toggle quoted message
Show quoted text
Hi all,
Is here someone kind enough to help me with
my HP8569B? I got it today and I am little
confused with frequency span button.
Although it is marked up to 500MHz I can not
set it to span greater than 10 MHz. It seems that
it is somehow mechanically blocked, there is a
small plastic rod going from analyzer's front
panel towards the span knob and ending inside it.
I did little research and figured out that this
rod is actually the thing that blocks the span button
from being turned further than to 10MHz span.
Shall I press something or do some other action to
disable that blocking?
Thanks for any advice.
Michal Vanka
|
Hi all,
Is here someone kind enough to help me with
my HP8569B? I got it today and I am little
confused with frequency span button.
Although it is marked up to 500MHz I can not
set it to span greater than 10 MHz. It seems that
it is somehow mechanically blocked, there is a
small plastic rod going from analyzer's front
panel towards the span knob and ending inside it.
I did little research and figured out that this
rod is actually the thing that blocks the span button
from being turned further than to 10MHz span.
Shall I press something or do some other action to
disable that blocking?
Thanks for any advice.
Michal Vanka
|
Option 003 8640B Details needed
Hello, I am in need of the parts listing and the schematic of the
Reverse Power Protection Module on the HP 8640B Sig gen. I have the
Cal procedure but nothing else.
Please let me know if you have a copy of these and I would be glad to
pay for any incurred exepnses.
Thanks, Peter K2LRC
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Re: PROM Programmer for HP5150A
Hi, i remember programming that chip some 20 years ago. It is fairliy simple and because the item is so small, you can do it "by hand" if you can't find another solution (wiring some switches and a timer for the programming voltage). In my TTL data book of 1979 they show the pinout and write: See Bipolar Microcomputer Components Data Book LCC4270. That one should be available somewhere in a university library or so. I also have a sheet of notes on programming the S188 somewhere, where... Regards Dieter Teuchert KJ Chadwick wrote: Hi All,
I have a thermal printer HP 5150A that requires a new character code PROM on the BCD (Binary Coded Decimal) circuit card. (The HP part number is 1816-0561.) The PROM is type 74S188 which is a 256 bit memory organised as 32*8 bits.
I can purchase the IC and I can work out the required bit map but I have no way of programming the PROM. ... -- Dipl.-Phys. Dieter Teuchert Software und Systeme Postanschrift: Telefon: Telefax: EMail Firma: EMail pers???nlich: Internet: Rommelstr. 6 D-76571 Gaggenau Germany +49 7225 989253 +49 7225 989254 info@... dieter@... _
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PROM Programmer for HP5150A
Hi
All,
?
I have
a thermal printer HP 5150A that requires a new character code PROM on the BCD
(Binary Coded Decimal) circuit card.? (The HP part number is 1816-0561.)
The PROM is type 74S188 which is a 256 bit memory organised as 32*8
bits.
?
I can
purchase the IC and I can work out the required bit map but I have no way of
programming the PROM.?
?
Anyone
know of a circuit for a suitable PROM programmer for this chip or could provide
this service for a fee?? All I can find on the net are references to EEPROM
or flash and newer chips.
?
Thanks
for any help,
?
Kevin
Chadwick
?
|
Re: HP8640M manual wanted
Hi, the opt.323 is not the same as the
8640M.
I have both manuals, but i still don't have the
manual for the Opt.323
Roger
toggle quoted message
Show quoted text
----- Original Message -----
Sent: Wednesday, June 02, 2004 1:59
AM
Subject: [hp_agilent_equipment] HP8640M
manual wanted
Hi There,
I need an HP8640B opt323 manual to fix my
generator.
I was told the manual is called an HP8640M for military.
I've
tried LOGSA and watched ebay for over a year, but nothing.
The HP8640A
and B manuals are some help,
but there are some differences in the
counter,
and thats where my problem is.
If you know where I can fnd
one,
please let me know.
All costs reimbursed.
Regards
Ray
vk2ilv
|
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Great place for Young Girls & Boys, or Mature Woman & Man to interact
with each other.
|
Hi There,
I need an HP8640B opt323 manual to fix my generator.
I was told the manual is called an HP8640M for military.
I've tried LOGSA and watched ebay for over a year, but nothing.
The HP8640A and B manuals are some help,
but there are some differences in the counter,
and thats where my problem is.
If you know where I can fnd one,
please let me know.
All costs reimbursed.
Regards
Ray vk2ilv
|
Re: hp 5100A /5110A synth set Spectrum Generator
Hi Morris:
I've looked further into the radio module and I think the only parts needed are a transistor and some support circuitry.
The transistor is biased off and the negative input swing causes it to generate a pulse. I have a module on the way to make some measurements.
Do you have any info on what the 1 MHz signal looks like in terms of magnitude and source impedance?
What output harmonics does the spectrum generator need to supply? I think it's only those from 3 to 4 MHz, or are there more?
73,
Brooke Clarke, N6GCE
toggle quoted message
Show quoted text
Date: Tue, 01 Jun 2004 08:32:09 +1000
From: Morris Odell <morriso@...>
Subject: RE: hp 5100A /5110A synth set Spectrum Generator
Hi all,
When repairing my 5110A with the dud SRD last week I tried several
varactors and eventually found one from a junked cellular base station
tansmitter which worked very well. It is a stud mounted power device
used a tripler in the final of a ? FM transmitter aroung 800 or so MHz
judging by the appearance of the rest of the circuit. It's about the
size of an older style 10 watt power zener, but gold plated with a
ceramic insulated header. It is made by NEC and labelled "SV 888". After
the HP 5110A SRD oven assembly together with its control transistor Q2
was removed from the board, there was plenty of room to mount the diode
on a pair of stiff wire "legs". It's probably the only non-US made part
in the whole system now, which is a sobering thought when you think of
where comonents come from these days.
There is lots of this sort of equipment around at hamfests etc. It had
been sitting in my junk box for years - it just goes to show you should
never throw anything out!
The 5100A/5110A synthesizer is now working perfectly. The only other
parts that had to be replaced were a fuse and the "power on" neon
indicator in the 5100A, both glass components :-) It's a very impressive
performer!
I note the comments about other harmonic generators. There are lots of
ways to do the job, and I had briefly thought about the subject before
finding my diode. Going for a technology shift would have required a lot
of reworking of the 5110A and would have been a major effort. HP seemed
to like SRDs, they are in quite a lot of other equipment including range
extender plugins for various counters and also the 8708A synchronizer.
This is the first one I have seen fail.
Morris
|
Hello
Looking for the schematics for the HP 8656B signal generator.
Hope some can help!
Best Regards
Hardy
|
Greetings everyone. Morris has kindly donated to me an
HP5100B synthesizer. Unfortunately the matching
HP5110B Driver was not part of the package (the
original 5110B having now gone to that great scrapyard
in the sky), and I'm desperately seeking a
replacement. Nothing of course on e-Bay. So if anyone
has a 5110B driver surplus to their requirements that
I can beg, borrow or steal (or buy for that matter)I
would be most grateful to hear from you. It need not
be working or even complete, as long as there is a
reasonable chance it could be repaired. Can somebody
help?
Thanks
Rob Fincher
VK3BRF
Find local movie times and trailers on Yahoo! Movies.
|
Re: hp 5100A /5110A synth set Spectrum Generator
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Re: hp 5100A /5110A synth set Spectrum Generator
Might also be worth trying a tunnel diode. They are excellent at turning
slow edges into fast ones, which is what you want if you're trying to
generate harmonics.
Stan Griffiths (w7ni@...) usually has some Tek-surplus diodes for
sale.
-- john KE5FX
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Show quoted text
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
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