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PG506 ISSUES Need some experienced minds!

Mlynch001
 

All:

I have a PG506 s/n >B0400000. It was plugged into my TM506 and working, then all the sudden, it quit, along with blowing a fuse on the 506. I was just in the process of familiarization with the entire unit, but the PG506 seemed to work normally up to that point. This was many months ago, so the details are foggy. After this event, the display quit and the high amplitude section quit. The display will occasionally generate random characters when the function switch is moved between ranges and the variable is switched in and out. I will say this up front, I am NOT any sort of EE or experienced technician, just a novice/hobbyist level technician. That being said, I followed the manual and found that the voltages on the +5V (5.065V @ F65), +16V, -16V (33.005 V between test points), -72V and +120V rails are normal. Output resistance was good per the performance check procedure. 9V was missing, which I traced to VR210, which was "open", Replaced with a standard 9.1V .5W zener diode. I understand, this is originally a temp compensated diode, I will get a suitable temp compensated item ordered and installed later, at least I have a 9V rail at the moment. The standard amplitude pulse is 1kHz, on the money, however, the amplitudes are off, both going into a 1M ohm and a 50 Ohm load and the signal amplitude "disappears" ( goes to almost "0") when the amplitude control is placed in the 20,50 or 100V Range. when switched to "DC" mode, the results are similar. Measured on my 2440 scope in the 1M range, the voltages are as follows .1V = .7040V, .2V = .2380V, .5V = .5920V, 1.0V = .6560V, 2V = 2.481V, 5V = 5.920V and 10V = 6.806V. 20,50 and 100V ranges do not indicate any appreciable voltage. One thing that stands out is that the .1, 1 and 10V ranges are all LOW, while the other ranges are slightly high? So I assume it is something to do with a divider section? Similar results with a recently calibrated TDS360, and my 465B so all these scopes cannot be wrong. The "Fast Rise" section appears to be very good, nice sharp square wave, with good edges (not very concerned with rise time at the moment).. Pulse amplitude control is functional. Trigger + Out is good. When I put the thing into "High Amplitude" mode, it all goes to crap. There is not a square wave and their is very little voltage, mostly a really noisy signal that looks like a ramp or a sawtooth DC signal with a bunch of noise over top of the signal. This signal measures a constant and approximate -7.5V DC, regardless of switch positions or amplitude control settings. There never is a 100V rail that I can find. One thing that I notice is that when switching to the High Amplitude mode, the voltage at F30 drops like a rock from about 22V down to about 10.5V. I am "assuming" this is from excess load from the high amplitude section??? I don't allow it to stay like that very long , but F30 has never blown. The "Service Manual" is very sparse with trouble shooting information. I suppose that they don't intend for hayseeds like me to be working on these things? Looking for some sage advice. Please feel free to ask questions and make suggestions. I'm going out to make more measurements.

--
Michael Lynch
Dardanelle, AR

Re: What is the fairest way to distribute scarce Tek resources

Daniel Koller
 

Hi all,  One could argue that the best way to share these resources is "the market" and let "market forces" be the arbitrator of supply and demand.  The best example of this we have now is probably e-bay.
   On the other hand, I hate e-bay.  The greedy bastards keep taking more and more of the cut and it's contaminated by bogus posts of Tek 453 oscilloscopes for $1000 that don't really exist, etc.   So, is there third party software that would allow us to set up our own auction site?  That could be kind of fun.   A small cut could be taken to support Tekscopes.
   But another observation:   We're all getting older, and there are not that many young people getting into electronics quite the way we did.  There is going to be more surplus test and measurement equipment coming as more of us pare down our collections.   I suspect supply will at least match demand (supply going down because the equipment also ages and leaves the realm of the functioning).
  Dan

On Tuesday, June 4, 2019, 12:41:24 PM EDT, Dennis Tillman W7PF <@Dennis_Tillman_W7PF> wrote:

Often when a member says they have some Tek scope/instrument/plugin/part/etc
that they no longer need or want the next person who happens to logon is the
lucky individual who grabs it.

On occasion I have been the first to reply and benefited from this. More
often than not I see the email long after the item has been spoken for.

This happens often enough to all of us that we would benefit from finding an
alternative way to share our combined resources.



I would like suggestions on what is a fairer way to distribute Tek related
things to TekScopes members.

This affects all of us. It should not depend on chance.



Dennis Tillman W7PF

Re: What is the fairest way to distribute scarce Tek resources

Dave Seiter
 

I doubt there is a truly "fair" way of doing it, as all methods will ultimately rely on either who's first, who has the best story, or who has the most money/desire.  One of the freecycle-type orgs suggest waiting for multiple requests to come in and then pick the request with the most need or best story.  Sounds noble, but I've been burned by what I thought was a good choice in the past- it's honestly hard to tell, and can come down to who can make up the best sob story, while you're probably missing the individual who it would benefit the most (yeah, I was a bit bitter about it!)  There are folks who appear to sit on Craigslist (free and otherwise) all day waiting for good items to show up.  When I use CL, I've found that waiting actually helps because 3/4 of the people who reply don't respond when contacted; but of course we don't have flakes in our group!
On the other hand, when you're giving things away, sometimes you're just happy to get rid of it!  Still no takers on my chassis, and we have our annual dumpster weekend coming up this week...  
-Dave

On Tuesday, June 4, 2019, 9:41:25 AM PDT, Dennis Tillman W7PF <@Dennis_Tillman_W7PF> wrote:

Often when a member says they have some Tek scope/instrument/plugin/part/etc
that they no longer need or want the next person who happens to logon is the
lucky individual who grabs it.

On occasion I have been the first to reply and benefited from this. More
often than not I see the email long after the item has been spoken for.

This happens often enough to all of us that we would benefit from finding an
alternative way to share our combined resources.



I would like suggestions on what is a fairer way to distribute Tek related
things to TekScopes members.

This affects all of us. It should not depend on chance.



Dennis Tillman W7PF

Re: How can we set up a Parts Wanted list on Groups.io

Dave Seiter
 

Maybe a simple spreadsheet or multi column doc that's writable by all?  Seems to me I've seen something like that in the past in another forum/group.
-Dave

On Tuesday, June 4, 2019, 9:46:13 AM PDT, Dennis Tillman W7PF <@Dennis_Tillman_W7PF> wrote:

At the Seaside OR ham swap meet last Saturday one of the TekScopes members
asked if there was a way to list some Tek parts he was looking for on
TekScopes.

Of course there really isn't one at the moment but if we could set one up
what would it look like and how would it work?

If we can work out something "simple" maybe we can get Groups.io to
implement it for us.



Does anyone know how other groups handle this?



Dennis Tillman W7PF

Re: What is the fairest way to distribute scarce Tek resources

ArtekManuals
 

"Life is not fair" nor was it ever intended to be.

If one has an overreaching need to be first in line then  it is their responsibility to research and subscribe to whatever email service is fastest and have it ring their phone at 3AM in the morning.

Dave
ArtekManuals

On 6/4/2019 12:40 PM, Dennis Tillman W7PF wrote:
Often when a member says they have some Tek scope/instrument/plugin/part/etc
that they no longer need or want the next person who happens to logon is the
lucky individual who grabs it.

On occasion I have been the first to reply and benefited from this. More
often than not I see the email long after the item has been spoken for.

This happens often enough to all of us that we would benefit from finding an
alternative way to share our combined resources.


I would like suggestions on what is a fairer way to distribute Tek related
things to TekScopes members.

This affects all of us. It should not depend on chance.


Dennis Tillman W7PF



--
Dave
Manuals@...
www.ArtekManuals.com

Re: How can we set up a Parts Wanted list on Groups.io

Vince Vielhaber
 

Every group on groups.io has a database to use. Perhaps we can make use of that.

Vince.

On 06/04/2019 12:45 PM, Dennis Tillman W7PF wrote:
At the Seaside OR ham swap meet last Saturday one of the TekScopes members
asked if there was a way to list some Tek parts he was looking for on
TekScopes.

Of course there really isn't one at the moment but if we could set one up
what would it look like and how would it work?

If we can work out something "simple" maybe we can get Groups.io to
implement it for us.



Does anyone know how other groups handle this?



Dennis Tillman W7PF


Re: How can we set up a Parts Wanted list on Groups.io

ArtekManuals
 

MY experience is they post to group with "NEED LEFT HANDED GONZO-PLATZ FOR A 800Z-SUPER SCOPE" . Lots of those in archive and has seemed to work in the past, so not sure what the problem is ????  Sounds like  "millennial thinking" is creeping into the process ?

Or as one my mentors in industry suggested when I was complaining about lack of support in the factory... "Dave ...show me where in your job description it says your job is easy ...now if you cant run with the big dogs ...stay on the porch"

Dave
NR1DX
manuals@...

On 6/4/2019 12:45 PM, Dennis Tillman W7PF wrote:
At the Seaside OR ham swap meet last Saturday one of the TekScopes members
asked if there was a way to list some Tek parts he was looking for on
TekScopes.

Of course there really isn't one at the moment but if we could set one up
what would it look like and how would it work?

If we can work out something "simple" maybe we can get Groups.io to
implement it for us.


Does anyone know how other groups handle this?


Dennis Tillman W7PF



--
Dave
Manuals@...
www.ArtekManuals.com

Re: What is the fairest way to distribute scarce Tek resources

Dave Seiter
 

I've got to admit, it annoys me to be the first to respond to an item on CL and be told "you were first, but we decided to give "it" to someone else...
-Dave

On Tuesday, June 4, 2019, 10:57:02 AM PDT, ArtekManuals <manuals@...> wrote:

 "Life is not fair" nor was it ever intended to be.

If one has an overreaching need to be first in line then  it is their
responsibility to research and subscribe to whatever email service is
fastest and have it ring their phone at 3AM in the morning.

Dave
ArtekManuals

On 6/4/2019 12:40 PM, Dennis Tillman W7PF wrote:
Often when a member says they have some Tek scope/instrument/plugin/part/etc
that they no longer need or want the next person who happens to logon is the
lucky individual who grabs it.

On occasion I have been the first to reply and benefited from this. More
often than not I see the email long after the item has been spoken for.

This happens often enough to all of us that we would benefit from finding an
alternative way to share our combined resources.

 

I would like suggestions on what is a fairer way to distribute Tek related
things to TekScopes members.

This affects all of us. It should not depend on chance.

 

Dennis Tillman W7PF




--
Dave
Manuals@...
www.ArtekManuals.com

Re: How can we set up a Parts Wanted list on Groups.io

David Berlind
 

How about a Google spreadsheet?

On June 4, 2019 12:46:12 PM "Dennis Tillman W7PF" <@Dennis_Tillman_W7PF> wrote:

At the Seaside OR ham swap meet last Saturday one of the TekScopes members
asked if there was a way to list some Tek parts he was looking for on
TekScopes.

Of course there really isn't one at the moment but if we could set one up
what would it look like and how would it work?

If we can work out something "simple" maybe we can get Groups.io to
implement it for us.



Does anyone know how other groups handle this?



Dennis Tillman W7PF


Re: What is the fairest way to distribute scarce Tek resources

n4buq
 

Followed by the next most annoying thing: "You're second in line but will let you know if the first deal falls through."

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dave Seiter" <d.seiter@...>
To: TekScopes@groups.io
Sent: Tuesday, June 4, 2019 1:12:20 PM
Subject: Re: [TekScopes] What is the fairest way to distribute scarce Tek resources

I've got to admit, it annoys me to be the first to respond to an item on CL
and be told "you were first, but we decided to give "it" to someone else...
-Dave

Re: How can we set up a Parts Wanted list on Groups.io

Dave Daniel
 

Just off of the top of my head, this would be a perfect application for a MediaWiki site (wiki framework that TekWiki uses. Why?

The main problem I see with group forum is that I think we would want individuals to be able to add available parts of wanted parts without everything having to go through a moderator. A moderator would be useful to keep the lists ummmm.... correct, not in an editorial sense but in a bottlewashing and botton sorting type of role.

A wkik allows anyonecwho is given access (and there are multiple levels of access) an easy way to edit the parts lists - and it IS easy - the markup language is straightforward.

Anyway, I used to be a semi-unwilling admin for a TekWiki site where an entire engineering team used it to create a structured and indexed set of arch and design documents for the development of a large embedded system. After a couple of weenks, the engineers were using it without much effort and it worked quite well.

DaveD

Sent from a small flat thingy

On Jun 4, 2019, at 12:45, Dennis Tillman W7PF <@Dennis_Tillman_W7PF> wrote:

At the Seaside OR ham swap meet last Saturday one of the TekScopes members
asked if there was a way to list some Tek parts he was looking for on
TekScopes.

Of course there really isn't one at the moment but if we could set one up
what would it look like and how would it work?

If we can work out something "simple" maybe we can get Groups.io to
implement it for us.



Does anyone know how other groups handle this?



Dennis Tillman W7PF



Re: What is the fairest way to distribute scarce Tek resources

Reginald Beardsley
 

We already have Dave Kirkby's list in addition to LeCroy, Tek and HPAK specific lists. I bought quite a bit of Sun equipment via the misc.forsale.computers.workstations Usenet list almost 30 years ago. Never had a problem. I also maintained a long list of computer resellers compiled from trade rags and other sources which I posted regularly.

The public nature of the mailing lists makes it very difficult for bad actors. They are quickly driven off. While it's fairly easy to fake an email identity, it's a lot harder to fake a bank account. I bought an 8753B/45076A and an 8566B from members of the HPAK and Kirkby's list with payment by check. Never had the least qualms about it.

If the groups.io files section uses sticky bit so that only the creator can modify or delete files then we could have a "for sale/wanted" section for people to list things in and update it as items sell or are obtained.

Dave, What chassis do you trying to get rid of?


Reg

NOS Tek 200-2260-00 Cover, Carrying Case $15

Oz-in-DFW
 

New-old stock. Purchased in 1995 and not used. I dimly remember it was for a 335 scope.

$15 + Actual shipping cost (and you pay whatever tax or duty your destination requires)

--
mailto:oz@... http://www.ozindfw.net
Oz; POB 93167; Southlake, TX 76092 (Near DFW Airport)

If electricity comes from electrons, does morality come from morons?

Tektronix 4S3

Brian
 

Hi all , does anyone on here have spare or know where I might get hold of a 4S3 plug-in for my 661 , its the only plug-in I dont have . There is no need for it to be in working order or for there to be any P6038 probes with it as I can sort that out . Much easier if located in the UK but maybe unlikely .

thanks in advance
Brian

Calibration suite for 500MHz TDS scopes

Dan Fish
 

I am downsizing. I have equipment that I have used (not in last several years) to get through calibration of TDS 500, 600, 700 series 500MHz scopes. I'm sure the equipment also applies to older digital and real time scopes. Be aware that this is just the test equipment, not the PC-AT, GBIB card/driver, or the Tek software you would also need. Info and software available on the GPIB subject through this group. I would like to bundle all this test equipment and ship it to one new owner, and I am asking this group first before putting it up on ebay. Any reasonable offers would be considered. Equip list and condition:
1. TM506 chassis, was rack-mounted, usual wear and tear, fan OK. Has four TM500 series plug-ins (below), all working, all have unbroken plastic bezels and clean front panels, three of the four have their pull-tabs. Pendant power cord.
2. SG503 Leveled Sine Wave Generator - in good shape except the missing pull-tab.
3. SG504 Leveled Sine Wave Generator - in good shape. I have seen it not switch correctly from Low to the High range when checking it out, but that seems to have gone away after exercising the switches.
4. Leveling head for the SG504 - not Tek, but from kit by group member. There is an adjustment inside for flatness that I did not have calibrated equipment to adjust, so it is just centered. Appeared flat using Boonton Millivolt meter.
5. DM501A Digital Multimeter - never used it myself, a handheld meter always seemed handier. Range switches acting up, may improve with exercise.
6. PS503A Power Supply, has +20, -20 adjustable and 5V fixed. Tracking knob is cracked.
7. Analogic DC Voltage Standard model AN3100 (not part of TM series) - precision DC source used in calibration procedures, in good shape with usual wear and tear.
8. A homebrew splitter for channel delay synchronization.

The chassis has two more open slots. I will provide power cord and copied manual for the AN3100, Manuals are available for the TM500 series through this group. If interested email me off-group at defish1@.... I can provide pictures or whatever.

Re: PG506 ISSUES Need some experienced minds!

scskits
 

My quick guess is a shorted or almost shorted tantalum inboard of F30.

ed

Re: NOS Tek 200-2260-00 Cover, Carrying Case $15

Phillip Potter
 

You’ve got email

On Jun 5, 2019, at 8:54 AM, Oz-in-DFW <lists@...> wrote:

New-old stock. Purchased in 1995 and not used. I dimly remember it was for a 335 scope.

$15 + Actual shipping cost (and you pay whatever tax or duty your destination requires)

--
mailto:oz@... http://www.ozindfw.net
Oz; POB 93167; Southlake, TX 76092 (Near DFW Airport)

If electricity comes from electrons, does morality come from morons?


Re: Calibration suite for 500MHz TDS scopes

 

Where on the planet are you? I might assume USA, but that might be rash ...

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dan Fish
Sent: 05 June 2019 21:42
To: TekScopes@groups.io
Subject: [TekScopes] Calibration suite for 500MHz TDS scopes

Re: Calibration suite for 500MHz TDS scopes

Dan Fish
 

Longview WA 45 mi. N of Portland OR.Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: "David C. Partridge" <@perdrix> Date: 6/5/19 2:25 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] Calibration suite for 500MHz TDS scopes Where on the planet are you?  I might assume USA, but that might be rash ...-----Original Message-----From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Dan FishSent: 05 June 2019 21:42To: TekScopes@...: [TekScopes] Calibration suite for 500MHz TDS scopes

Re: NOS Tek 200-2260-00 Cover, Carrying Case $15 (spoken for)

Oz-in-DFW
 

The cover is committed