Date   

Two plugins and a sampling unit

 

Hi

I have a 1s2 sampling unit
A 1a1 dual trace plugin
And a 1a7a differential amp

Anybody want to trade or buy these?

Rob


Re: HPIB/GPIB adapter

Vince Vielhaber
 

Not necessarily. You may be able to just use a script and feed that into
a program that comes with the USB/GPIB (if one comes with it). The script
would simply be the commands needed by the HP. Something like this:

FREQ 1.5 MHZ
OUT:POW 0.0 DBM

Vince.


On Sat, October 3, 2015 6:22 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
Vince,
I read from your reply that this isn't a trivial matter, that I have to
get into the programming as well as figure out compatibility, etc.  I
guess I am discouraged.
I believe the interface comes with some sort of installation CD or
something.  I'm a novice here; I'm great with hardware and analog stuff
but GPIB is something else.  <sigh>
Bob



On Saturday, October 3, 2015 2:56 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


  First you'll need the programming manual for the 8657B. You'll also
need
the info on how to talk to the USB-GPIB adapter. After that it depends on
the operating system you're using.

Vince.

On Sat, October 3, 2015 5:33 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
Actually that wouldn't be bad; I could trim the number of points to get
speed and then narrow it down.  So now the question arises as to what
hardware and software would do the job.
I have an 8657B and want to program it to sweep from 1.5 to 30 MHz in
sections.  I can buy a GPIB to USB adapter from China for about
$40. 
Will that do, and if so, where can I get (or learn to create) the
appropriate software?
My interest here is for alignment of band pass filters in front ends of
amateur radio transceivers.

Bob K6DDX



On Saturday, October 3, 2015 12:43 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


 
50 points will probably take 15 to 25 seconds. If you want to do it in a
second or two, you'll be better off with a sweep generator. The drawback
with a sweep generator is if you're testing something and the DUT fails
or
has a problem in the middle of the sweep, you don't know what the freq
was
where it happened. If you're not worried about that or don't care, a
sweep generator will be the way to go.

Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium


Re: HPIB/GPIB adapter

stefan_trethan
 

Most interfaces do come with software support and examples and stuff,
check it out before you buy.

I found it more practical to stick with Agilent IO libraries and
compatible interface hardware (some chinese adapters are). This
decouples the software from the interface completely and hopefully I
will not have to re-write the software again, as I had to when ISA
went obsolete, and now again as PCI goes away. Already I find it
useful that the instrument can be connected whichever way (USB, LAN,
GPIB, RS232) and I don't have to modify my software at all.

ST

On Sun, Oct 4, 2015 at 12:22 AM, Bob Albert bob91343@yahoo.com
[TekScopes] <TekScopes@yahoogroups.com> wrote:
Vince,
I read from your reply that this isn't a trivial matter, that I have to get into the programming as well as figure out compatibility, etc. I guess I am discouraged.
I believe the interface comes with some sort of installation CD or something. I'm a novice here; I'm great with hardware and analog stuff but GPIB is something else. <sigh>


Re: 5 1/2 digit dvm Fluke 8810a for sale

 

$18.91 shipping, michael is ahead of you


Jerry Massengale

-----Original Message-----
From: Bob Albert bob91343@yahoo.com [TekScopes] <TekScopes@yahoogroups.com>
To: TekScopes <TekScopes@yahoogroups.com>
Sent: Sat, Oct 3, 2015 5:19 pm
Subject: Re: [TekScopes] 5 1/2 digit dvm Fluke 8810a for sale






91343

On Saturday, October 3, 2015 3:05 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


what zip? weight is 6#12oz

Jerry Massengale

-----Original Message-----
From: Bob Albert bob91343@yahoo.com [TekScopes] <TekScopes@yahoogroups.com>
To: TekScopes <TekScopes@yahoogroups.com>
Sent: Sat, Oct 3, 2015 4:24 pm
Subject: Re: [TekScopes] 5 1/2 digit dvm Fluke 8810a for sale

How much shipping to Los Angeles?
Bob K6DDX


On Saturday, October 3, 2015 12:39 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


hi,

i have a surplus fluke 8810A that is a very accurate dc voltmater, it has has no ac or ohms or current. very good for voltage measurements. $10 plus shipping.

Jerry Massengale

j_massengale@aol.com



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Re: HPIB/GPIB adapter

Bob Albert
 

Vince,
I read from your reply that this isn't a trivial matter, that I have to get into the programming as well as figure out compatibility, etc.  I guess I am discouraged.
I believe the interface comes with some sort of installation CD or something.  I'm a novice here; I'm great with hardware and analog stuff but GPIB is something else.  <sigh>
Bob

On Saturday, October 3, 2015 2:56 PM, "vev@michvhf.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


  First you'll need the programming manual for the 8657B. You'll also need
the info on how to talk to the USB-GPIB adapter. After that it depends on
the operating system you're using.

Vince.

On Sat, October 3, 2015 5:33 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
Actually that wouldn't be bad; I could trim the number of points to get
speed and then narrow it down.  So now the question arises as to what
hardware and software would do the job.
I have an 8657B and want to program it to sweep from 1.5 to 30 MHz in
sections.  I can buy a GPIB to USB adapter from China for about $40. 
Will that do, and if so, where can I get (or learn to create) the
appropriate software?
My interest here is for alignment of band pass filters in front ends of
amateur radio transceivers.

Bob K6DDX



On Saturday, October 3, 2015 12:43 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


 
50 points will probably take 15 to 25 seconds. If you want to do it in a
second or two, you'll be better off with a sweep generator. The drawback
with a sweep generator is if you're testing something and the DUT fails or
has a problem in the middle of the sweep, you don't know what the freq was
where it happened. If you're not worried about that or don't care, a
sweep generator will be the way to go.

Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium

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Re: 5 1/2 digit dvm Fluke 8810a for sale

Bob Albert
 

91343

On Saturday, October 3, 2015 3:05 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


  what zip? weight is 6#12oz

Jerry Massengale

-----Original Message-----
From: Bob Albert bob91343@yahoo.com [TekScopes] <TekScopes@yahoogroups.com>
To: TekScopes <TekScopes@yahoogroups.com>
Sent: Sat, Oct 3, 2015 4:24 pm
Subject: Re: [TekScopes] 5 1/2 digit dvm Fluke 8810a for sale

How much shipping to Los Angeles?
Bob K6DDX


On Saturday, October 3, 2015 12:39 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


hi,

i have a surplus fluke 8810A that is a very accurate dc voltmater, it has has no ac or ohms or current. very good for voltage measurements. $10 plus shipping.

Jerry Massengale

j_massengale@aol.com

[Non-text portions of this message have been removed]

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Re: TDS644A Aquisition Board problem.

r221b@juno.com
 

OK... Minor (?) correction... Pin 15 and 16 are NOT swapped. El stupido had the pin rows reversed. (I used pin 2 as 1, and 1 as 2...) The resistance measurements are correct though. I still think 24.5 ohms is too low for the +5V line. And polarity makes no difference.


Re: 5 1/2 digit dvm Fluke 8810a for sale

 

what zip? weight is 6#12oz


Jerry Massengale

-----Original Message-----
From: Bob Albert bob91343@yahoo.com [TekScopes] <TekScopes@yahoogroups.com>
To: TekScopes <TekScopes@yahoogroups.com>
Sent: Sat, Oct 3, 2015 4:24 pm
Subject: Re: [TekScopes] 5 1/2 digit dvm Fluke 8810a for sale






How much shipping to Los Angeles?
Bob K6DDX


On Saturday, October 3, 2015 12:39 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


hi,

i have a surplus fluke 8810A that is a very accurate dc voltmater, it has has no ac or ohms or current. very good for voltage measurements. $10 plus shipping.

Jerry Massengale

j_massengale@aol.com

[Non-text portions of this message have been removed]

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[Non-text portions of this message have been removed]









[Non-text portions of this message have been removed]


Re: HPIB/GPIB adapter

Vince Vielhaber
 

First you'll need the programming manual for the 8657B. You'll also need
the info on how to talk to the USB-GPIB adapter. After that it depends on
the operating system you're using.

Vince.



On Sat, October 3, 2015 5:33 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
Actually that wouldn't be bad; I could trim the number of points to get
speed and then narrow it down.  So now the question arises as to what
hardware and software would do the job.
I have an 8657B and want to program it to sweep from 1.5 to 30 MHz in
sections.  I can buy a GPIB to USB adapter from China for about $40. 
Will that do, and if so, where can I get (or learn to create) the
appropriate software?
My interest here is for alignment of band pass filters in front ends of
amateur radio transceivers.

Bob K6DDX



On Saturday, October 3, 2015 12:43 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


 
50 points will probably take 15 to 25 seconds. If you want to do it in a
second or two, you'll be better off with a sweep generator. The drawback
with a sweep generator is if you're testing something and the DUT fails or
has a problem in the middle of the sweep, you don't know what the freq was
where it happened. If you're not worried about that or don't care, a
sweep generator will be the way to go.

Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium


Re: HPIB/GPIB adapter

Bob Albert
 

Actually that wouldn't be bad; I could trim the number of points to get speed and then narrow it down.  So now the question arises as to what hardware and software would do the job.
I have an 8657B and want to program it to sweep from 1.5 to 30 MHz in sections.  I can buy a GPIB to USB adapter from China for about $40.  Will that do, and if so, where can I get (or learn to create) the appropriate software?
My interest here is for alignment of band pass filters in front ends of amateur radio transceivers.

Bob K6DDX

On Saturday, October 3, 2015 12:43 PM, "vev@michvhf.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


 
50 points will probably take 15 to 25 seconds. If you want to do it in a
second or two, you'll be better off with a sweep generator. The drawback
with a sweep generator is if you're testing something and the DUT fails or
has a problem in the middle of the sweep, you don't know what the freq was
where it happened. If you're not worried about that or don't care, a
sweep generator will be the way to go.

Vince.

On Fri, October 2, 2015 8:47 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
The only missing information is how much time it will take for a sweep. 
If a sweep with 50 points can be accomplished in a second or two, that
would be fast enough.
I may end up having to buy a sweep generator but those don't come cheaply
if they are any good.
Bob



On Friday, October 2, 2015 4:20 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


 
On Fri, October 2, 2015 7:03 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
I guess what want is to learn what to look for.  I don't have any of
the
common uses for this interface; I just want to send commands that can't
come from the front panel.  In particular, I want to make a sweep
generator out of my 8657B, which has no sweep function but perhaps can
do
that via the GPIB.
Any comments on this?  Perhaps it's not feasible or practical but
this
interface costs a lot less than a decent sweep generator.
Bob
Bob, the answer is yes and no. While you can write a program or script to
send the commands to the 8657, it will take time for the 8657 to process
it and set the freq. You'll end up with a staircase instead of a sweep.
The more steps you want to include, the longer it will take to complete.
If you try to send the commands too quickly, you'll miss steps and the
generator will give you a bunch of errors.

Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium

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Re: 5 1/2 digit dvm Fluke 8810a for sale

Bob Albert
 

How much shipping to Los Angeles?
Bob K6DDX

On Saturday, October 3, 2015 12:39 PM, "jerry massengale j_massengale@aol.com [TekScopes]" <TekScopes@yahoogroups.com> wrote:


  hi,

i have a surplus fluke 8810A that is a very accurate dc voltmater, it has has no ac or ohms or current. very good for voltage measurements. $10 plus shipping.

Jerry Massengale

j_massengale@aol.com

[Non-text portions of this message have been removed]

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7L12: advice please

John
 

I've been given a 7L12 to renovate. It does show many signs of life, as the frequency scan is accurate, and the cal signal looks the right shape, but as far as I can see, it's about 12 to 15dB insensitive / down in amplitude, with a commensurately high noise floor.

The input attenuator seems to step the signal in 10dB steps, and nothing is loose inside. However, it looks like a nightmare to get this unit apart to have a good look at the central board assembly? Is there an elegant way in?

Cheers

John


TDS644A Aquisition Board problem.

r221b@juno.com
 

Hello all. I'm in the process of trying to restore a TDS644A. Ive already stripped off the surface mount caps, cleaned all the solder pads, washed and dried the board as the group info here suggests. I started to replace the caps with new ones but decided to make some ohmmeter checks while the board was not fully populated. I've discovered something strange that maybe someone here can comment on. I've shecked all of the pins on the Aq. Bd. J700 and J101 to ground. I have a schematic for the TDS544A power supply and it seems the same as the 644A. J700 (40 pin ribbon connector socket) is the analog power supply connection and goes J5 on the PS. J5 connections are the same as the 544A schematic. I still have the aquisioion board out of the scope with nothing external connected. The ground pins on J700 are pins 5,6,13,14,15,21,22,23,24,31,32,33,34. The -5.1V pins are 16,17,18,18,20. The +5V pins are 35,36,37,38,39,40. My ohmmeter reads 209 ohms from the -5.1V pims to ground. I read 24.5 ohms from the +5V pins to ground. From that I think there's a problem with something connected to that +5V line. I'm guessing the resistance should be much higher. Possibly the same with the -5.1V line. Well, all of that isn't too strange, BUT when I was measuring the ground pins, pin 15 (which should be ground) seems to be connected to the -5.1V line and pin 16 (which should go the -5.1V line) measures zero! Effectively it looks like pin 15 and 16 are swapped! Now the power and ground pins all disperse inside of the PC board. I can't find any external traces or connections that connect the ground or the power pins together. My theory is that somehow the -5.1V line got shorted to the pin 15 ground and opened the connection. Possibly the pin 16 connection got shorted to ground too. My first instinct is that there's an IC that has both the + and - 5V supplies connected and is defective. Since this could be a major undertaking to find and fix, has anyone here had a similar problem with the TDS series boards? Is there anyone has a 644A or similar that might measure the J700 pins for resistance to ground and help me determine where to start? Please measure with the two power cables removed from the board. BTW, I have meticuously inspected the board for any visible shorts and couldn't find any. Of course it's possible that there is a problem under one of the chips, but I haven't removed any yet. I'd really like to find this problem so any suggestions (and measurements!) would be greatly appreciated.


Re: HPIB/GPIB adapter

Vince Vielhaber
 

50 points will probably take 15 to 25 seconds. If you want to do it in a
second or two, you'll be better off with a sweep generator. The drawback
with a sweep generator is if you're testing something and the DUT fails or
has a problem in the middle of the sweep, you don't know what the freq was
where it happened. If you're not worried about that or don't care, a
sweep generator will be the way to go.

Vince.



On Fri, October 2, 2015 8:47 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
The only missing information is how much time it will take for a sweep. 
If a sweep with 50 points can be accomplished in a second or two, that
would be fast enough.
I may end up having to buy a sweep generator but those don't come cheaply
if they are any good.
Bob



On Friday, October 2, 2015 4:20 PM, "vev@michvhf.com [TekScopes]"
<TekScopes@yahoogroups.com> wrote:


 
On Fri, October 2, 2015 7:03 pm, Bob Albert bob91343@yahoo.com [TekScopes]
wrote:
I guess what want is to learn what to look for.  I don't have any of
the
common uses for this interface; I just want to send commands that can't
come from the front panel.  In particular, I want to make a sweep
generator out of my 8657B, which has no sweep function but perhaps can
do
that via the GPIB.
Any comments on this?  Perhaps it's not feasible or practical but
this
interface costs a lot less than a decent sweep generator.
Bob
Bob, the answer is yes and no. While you can write a program or script to
send the commands to the 8657, it will take time for the 8657 to process
it and set the freq. You'll end up with a staircase instead of a sweep.
The more steps you want to include, the longer it will take to complete.
If you try to send the commands too quickly, you'll miss steps and the
generator will give you a bunch of errors.

Vince.
--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium

--
Michigan VHF Corp. http://www.nobucks.net/ http://www.CDupe.com/
http://www.foggymist.com The Foggy Mist Emporium


Re: Since we're talking about Europe...

n4buq
 

On Sat, 3 Oct 2015 08:27:08 -0500, you wrote:

On 10/2/2015 8:17 PM, David davidwhess@gmail.com [TekScopes] wrote:

On 02 Oct 2015 09:55:25 -0700, you wrote:

"Why a decimal point can't be a decimal point everywhere" People from
other parts of the world ask the same thing about us. I does happens
in a series of things, who is wrong or right.
Dates - US - MM/DD/YY most other parts of the world DD/MM/YY is one
example. It creates many confusions when the dating the first 12 days
of every month.
I grew up in South America, I was used to "," there is just called a
comma not a decimal point. They use the metric system and there is no
spelling bee.

I tend to use YYDDMM in that order in filenames so they can be sorted.
On Oct 3, 2015, at 3:30 AM, Dave Daniel kc0wjn@gmail.com [TekScopes]
<TekScopes@yahoogroups.com> wrote:

I've been using YYMMDD for about twenty-five years now for the same
reason.
So, the filenames can't be sorted if they don't have YYMMDD in them? ???

Barry
They can be sorted but the order is not useful.

If I have a bunch of filenames with the same prefix followed by YYMMDD
(or YYYYMMDD), then alphabetical sorting produces a list ordered by
date. If the conventional US standard of MMDDYY (or MMDDYYYY) is
used, then the sorted list is out of order.
Yes, I understood. I was just being facetious. Some email readers might not have displayed the three smiley faces at the end of my email.

Barry - N4BUQ


5 1/2 digit dvm Fluke 8810a for sale

 

hi,


i have a surplus fluke 8810A that is a very accurate dc voltmater, it has has no ac or ohms or current. very good for voltage measurements. $10 plus shipping.

Jerry Massengale


j_massengale@aol.com


Re: Programming a new NVRAM (Dallas DS1220Y) with a EPROM programmer

 

Hi Mitch,

I can't speak for your source in Hong Kong, and there are probably many of
these companies there, so there would be no point.

But what I can recommend with absolute certainty is UTSource in China. I
have been buying rare, or hard to find, or obsolete ICs and other
semiconductors from UTSource for the past 8 or 9 years and I have never had
a dud. I know because I almost always use the parts immediately to repair my
equipment with them. I always wondered how they were able to find these
parts.

Don't be put off by their ordering process. You can search for a part on
their web site and if you find it you then have to ask for a quote. That
takes about a day. Parts arrive in about a week after you pay for your
order. There are lots of ways to pay. Their prices are always reasonable.
For some odd reason I always seemed to pay $4 or $5 each regardless of what
parts I was buying. It seemed like more than a coincidence that the prices
were always about the same.

I have no financial interest in this company other as a totally satisfied
customer who trusts them completely.
http://www.utsource.net/

Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@yahoogroups.com [mailto:TekScopes@yahoogroups.com]
Sent: Saturday, October 03, 2015 10:29 AM
To: TekScopes@yahoogroups.com
Subject: Re: [TekScopes] Re: Programming a new NVRAM (Dallas DS1220Y) with a
EPROM programmer

It's not just these, I got hosed on some UPC1678 MMIC's that Icom uses for
the driver to the PA, mounted 4, all dud's.(These came from HK) Ordered
Parts from Icom and it worked the first time. At least I now know what to
look for before purchase.

Mitch
N4MF

------------------------------------
Posted by: n4mf_sc@yahoo.com
------------------------------------


Re: Programming a new NVRAM (Dallas DS1220Y) with a EPROM programmer

n4mf_sc
 

It's not just these, I got hosed on some UPC1678 MMIC's that Icom uses for the driver to the PA, mounted 4, all dud's.(These came from HK) Ordered Parts from Icom and it worked the first time. At least I now know what to look for before purchase.

Mitch
N4MF


Tek 2465 DMS Update and New Issue

MJATS@...
 

Ref this thread:

All about classic Tektronix CRT o'scopes https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/118486

https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/118486

All about classic Tektronix CRT o'scopes https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/118486 All about classic Tektronix CRT oscilloscopes, their use, repair, and collecting. (If you want to join, please make sure you write something relevan...



View on groups.yahoo.com https://groups.yahoo.com/neo/groups/TekScopes/conversations/topics/118486
Preview by Yahoo


I performed this calibration method today as recommended by Dallas using a Heahkit IG-4244 Oscilloscope calibrator and I was amazed that it worked! The CT Test 81 Fail 02 error on power up is gone.

I also initiated the calibration routine for DMM option to see what constants it required. The first constant it wanted was .19 VDC and unfortunately I don't have that voltage source so I backed out of the cal procedure.



All was well....initially. The scope powered up for the first time with no errors logged. But then later on it started logging BU Test F1 Fail 10. This is a EAROM test on the Buffer board and it's flagging a bad checksum. I'm in the dark as to where to proceed with this error. Is it something I did wrong when calibrating the Counter/Trigger option? Or something else? Any pointers would be greatly appreciated.


Mike


Update on Deane's passing

petepdx1955
 

First I want to copy something Dennis Tillaman said


>Deane's passing has put the entire project on a back burner. Her dad's death
has hit Pam and the family really hard.

Everything will be put of for sale, either on a Web store or Ebay.


But first I want to emphasize a couple things and ask for patience.


Please do not attempt to contact the family. Any additional pressure will
ensure the task of making everything available will be simplified. There
will be nothing, the equipment and parts will be on their way to China as
scrap and the manuals will reappear as "Post consumer content".

A couple years ago I started helping Pam, Deane's daughter with what
can be done to dispose of the collection.This is not just a clean out the
2nd bedroom and put the stuff on Ebay size project.The project has
been delayed for various reasons.


On a side note, it was a lot of fun having Pam pickup Deane and bring
him over to help out sorting parts. He was the Deane I remember from
when I was at Tek and enjoyed being "put to work".


When and how things are sold are totally up to Pam, I am only acting
as adviser and being the computer systems admin, web jockey etc


I will send an update in a few weeks.


Regards


-pete


PS If you have memories of Deane, please post something to the
memorial site. It will be most appreciated

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