Date   
Re: TM 501 power supply repair

 

Hi Greg,
Yes, it is crammed pretty tight in there. I had forgotten all about how difficult it is to work inside it.
Dennis Tillman W7PF

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]
Sent: Thursday, March 03, 2016 10:33 PM
To: TekScopes@...
Subject: [TekScopes] TM 501 power supply repair

I recently took possession of a used TM 501 power supply module that required repair of the electrical between the rear panel and the printed circuit board. To my surprise, it almost required the expertise of a brain surgeon to execute.

I’m not really sure as to how Tek managed to assemble this unit. To access the area around the fuse holder located below the transformer required removal of the transformer and printed circuit board. But all of the wiring was stretched between the printed circuit board, transformer and the fuseholder somewhat like the strings in a piano. To boot, a printed circuit ground wire was stretched from the board rearwards to a solder lug fastened to a stud on the rear panel. This prevented forward movement of the printed circuit board of less than three quarters of an inch. To remove the nut, the transformer had to be unfastened and wedged to one side and a ¼” mini box wrench squeezed in through the partially open rear panel transformer opening.

In addition, as part of the disassembly, the power pass transistors Q10 and Q12 which are secured to the bottom of the housing had to be detached by removal of their mounting screws and nuts (the two acorn nuts on the bottom side of the unit). When the screws were removed, both transistors simply fell out of the holes in the printed circuit board. Tektronix never soldered them in!!! It was by pure luck that the lead bend used was slightly misaligned causing each lead to press against one side of its PC pad hole thereby apparently making reasonable contact over the years that the unit was in use. Quite a surprise.

In all, nearly 1-1/2 hours were required in the disassembly and reassembly of this unit. If you ever require access to replace the fuseholder or power cord, be prepared for quite an experience.

Greg

------------------------------------
Posted by: big_sky_explorer@...
------------------------------------

TM 501 power supply repair

Greg Muir
 

I recently took possession of a used TM 501 power supply module that required repair of the electrical between the rear panel and the printed circuit board. To my surprise, it almost required the expertise of a brain surgeon to execute.

I’m not really sure as to how Tek managed to assemble this unit. To access the area around the fuse holder located below the transformer required removal of the transformer and printed circuit board. But all of the wiring was stretched between the printed circuit board, transformer and the fuseholder somewhat like the strings in a piano. To boot, a printed circuit ground wire was stretched from the board rearwards to a solder lug fastened to a stud on the rear panel. This prevented forward movement of the printed circuit board of less than three quarters of an inch. To remove the nut, the transformer had to be unfastened and wedged to one side and a ¼” mini box wrench squeezed in through the partially open rear panel transformer opening.

In addition, as part of the disassembly, the power pass transistors Q10 and Q12 which are secured to the bottom of the housing had to be detached by removal of their mounting screws and nuts (the two acorn nuts on the bottom side of the unit). When the screws were removed, both transistors simply fell out of the holes in the printed circuit board. Tektronix never soldered them in!!! It was by pure luck that the lead bend used was slightly misaligned causing each lead to press against one side of its PC pad hole thereby apparently making reasonable contact over the years that the unit was in use. Quite a surprise.

In all, nearly 1-1/2 hours were required in the disassembly and reassembly of this unit. If you ever require access to replace the fuseholder or power cord, be prepared for quite an experience.


Greg

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 

Well, for kicks and curiosity, I took the CRT circuit out of the 7613 for a look. At first I saw what looked like electrolyte splatter on the precision resistor network, but saw no blown caps. Then I started looking at other things and I noticed what appears to be an arc hole through the edge of one of the .001uf 10kv capacitors on HV board #2.

I don't recall hearing any arcing noises when I had the thing powered on, but I only had it on for under a minute due to the extreme intensity.

All the date codes on the HV boards are '75 or '76, so it's not surprising to me that it's had a failure.

I've been trying to figure out what to work on next and use the 7854 on in order to check out the rest of it's functionality. I also have an STP2145A OCXO just lying around if I can decide what to do with it.


It's been running strong for 7 hours now. It took over 5 hours for the readout to drift to the top of the CRT. After 5-10 minutes off, then running again for an hour, the readout has drifted about 1 minor division. I haven't been leaving the readout on, just turning it on to check it's position from time to time.

I have all weekend to test it out and work on it...

Re: Tek 7854 Info, Repair, Restore

 

On 03 Mar 2016 18:31:29 -0800, you wrote:

...

The variable persistence of the 7613 is very useful. It would be
better to fix it in my opinion.

Does the 7B50 work? If so it could be used to test the 7854.
No, the 7B50 came with the 7613 and was marked 'parts only' and is missing some things. Def. not functional.
Well, the 7B50 is pretty old and 7B50As are very common. I got a
7B50A with a group of 7000 plug-ins.

I hope the 7613 repair is an interesting and inexpensive one. I think it will be. Powers on, CRT intensity uncontrollable and high. Responds to controls. Can see readout info and a trace, but it looks like junk.
Does not sound like it has any major problems then. At the very least
it should be restorable to non-storage condition.

At this point the only thing I know is not working quite right is the
beam finder in regards to the vertical limiting.

With two timebases, you can set them up to generate a raster allowing
higher brightness for testing without damaging the CRT.
I have no idea what you're talking about with "raster" but I'll look it up.
With one timebase in a vertical slot and another in a horizontal slot,
they can be set to generate a raster which scans the beam over the
entire screen which will prevent damage if the intensity is high. It
is also a good way to look for burns to the screen.

I'll be sticking this 7B85 in and checking it out in about 10 minutes.

Also, Francis said he still has the ROM files and will email them to me once he locates them. That way I will already have the exact files used and don't have to risk anything if I ever need to replace them.
I am pretty sure the files he used are the same ones available online.

On 03 Mar 2016 19:41:26 -0800, you wrote:

After all this time running with various sweep signals...

The readout has drifted vertically. The top readout is now at the top edge of the CRT.

<https://groups.yahoo.com/neo/groups/TekScopes/photos/albums/310017053/lightbox/28198901?orderBy=ordinal&sortOrder=asc&photoFilter=ALL#zax/28198901>
It sure has. Running the mainframe after being so long in storage may
clear that up.

On 03 Mar 2016 20:13:13 -0800, you wrote:

After powering off and waiting about 5 minutes, the readout is closer to its normal position.Of course I will verify this over the next couple of days running.
Hopefully any drift of the display elements will cease after a couple
days of operation.

The 7B85 works. I replaced:
C691, C692, C697, and C5 (10uf 25V axials with Nichicon PW)
L692, which was fried crispy and caused heat discoloration of the board.
C863 (pretty much just because. It's ESR was a wee bit high - and I just don't like 22uf 15V/16V tantalums....)
I wonder what happened to L692. It is just for decoupling so it can
be replaced with a wire if necessary until a replacement inductor can
be found.

The A intensity pot definitely needs to be rebuilt at some point. It's causing the intensity to go all over the place when it's being turned. Just a note for later...
The A intensity potentiometer on mine is that way and most of my other
4 bay 7000 mainframes have this problem to one extent or another.

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 

After powering off and waiting about 5 minutes, the readout is closer to its normal position.Of course I will verify this over the next couple of days running.

The 7B85 works. I replaced:
C691, C692, C697, and C5 (10uf 25V axials with Nichicon PW)
L692, which was fried crispy and caused heat discoloration of the board.
C863 (pretty much just because. It's ESR was a wee bit high - and I just don't like 22uf 15V/16V tantalums....)

The A intensity pot definitely needs to be rebuilt at some point. It's causing the intensity to go all over the place when it's being turned. Just a note for later...

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 

576 on ebay, local pickup CA only

Paul Amaranth
 

Cosmetically, looks pretty good. Parts or not working, currently
at $49. Local pickup only in Corona, CA. 5 days to go.

No interest, yada, yada

Item 272154364651

--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 

The Artek manual I have for the 7B85 does not have the scans split
>into separate pages; they are just low resolution making it difficult
>to impossible to read the part designations.
>
>The available scan at Tekwiki is the same one I am using; the link to
>the OCR scan says it is missing. The gray parts showing different
>changes are very light making them difficult to see. Processing the
>pages to improve the readability helps a little but I would rather
>find a better scan.

I am considering buying the actual manual. If I do I might take it over to the local printing&binding place and have them do a high-res color scan for me. If they want more than $10 for it i'll just do it myself.

>A different 7B85 would likely have the same age related problem. Bad
>aluminum electrolytic capacitors in a 7B85 are not going to cause it
>to fail and will not even be noticeable without exacting performance
>tests.

I gently desoldered and removed L692. It fell apart. I replaced it with a spare and gave it some space from the board. I hope it doesn't also get fried. I checked all the transistors that run off the 5V on A4, and all read good.

Those SL aluminums are supposed to be under 1ohm from what I've read. All 3 decoupling caps on A4 read near 3ohm, and read 35%+ high for C measurements. I replaced them with Nichi PW's.

>>I can't remember the axial equivalent of Nichi's PW series. Do you >happen to know it off hand?


4.7 to 10 microfarad axial solid tantalum capacitors would also work
>as replacements for the 10uF axial aluminum electrolytics. I would
>actually expect them to work better.


Good to know. I'll keep that in mind. I don't have a whole lot of smaller dry axial tants right now, but I've been wanting to get some.

>The variable persistence of the 7613 is very useful. It would be
>better to fix it in my opinion.
>
>Does the 7B50 work? If so it could be used to test the 7854.

No, the 7B50 came with the 7613 and was marked 'parts only' and is missing some things. Def. not functional.

I hope the 7613 repair is an interesting and inexpensive one. I think it will be. Powers on, CRT intensity uncontrollable and high. Responds to controls. Can see readout info and a trace, but it looks like junk.

>At this point the only thing I know is not working quite right is the
>beam finder in regards to the vertical limiting.
>
>With two timebases, you can set them up to generate a raster allowing
>higher brightness for testing without damaging the CRT.

I have no idea what you're talking about with "raster" but I'll look it up.
I'll be sticking this 7B85 in and checking it out in about 10 minutes.

Also, Francis said he still has the ROM files and will email them to me once he locates them. That way I will already have the exact files used and don't have to risk anything if I ever need to replace them.

The 7854 has been running strong for 3.5 hours with no failures.

Re: Tek 7854 Info, Repair, Restore

 

On 03 Mar 2016 17:04:03 -0800, you wrote:

Mine is the earlier version. It's SN B088223.. just at the end of that version's production run. The hybrid on the DVM board has a 2009 date code and the unit was previously owned by Magnavox, so I would have a guess that it's been fairly well taken care of and calibrated.
Calibration is pretty easy.

It is an interesting design. The delay time readout is generated by a
digital voltmeter reading the voltage from the delay time
potentiometer instead of a timer/counter. The early portables with a
digital readout of the delay time like the 465 series and 2230/2232
also use a digital voltmeter. I am not sure how the 2246 and 2247A do
it; they may use an actual timer/counter.

The scans of the service manual that I have including the Artek one
are not very good.
I don't like the Artek schematic scans for this unit since they are split up into separate pages. Tekwiki's link to the SM has some good ones.
The Artek manual I have for the 7B85 does not have the scans split
into separate pages; they are just low resolution making it difficult
to impossible to read the part designations.

The available scan at Tekwiki is the same one I am using; the link to
the OCR scan says it is missing. The gray parts showing different
changes are very light making them difficult to see. Processing the
pages to improve the readability helps a little but I would rather
find a better scan.

None of the solid tantalum capacitors on that board can short the
power supply damaging L692. Solid tantalum C683 is a coupling
capacitor. The two added on solid tantalum capacitors if your 7B85
has them are filtering for the -5 volt regulator. I guess early
versions had these added on and then they removed them later.

I assume you mean ESR of the aluminum electrolytics. They are only
used for bulk local decoupling so you will not need to replace them to
test the board. High ESR may only affect performance slightly. The
solid tantalums should not have changed in ESR.
I'm uploading a picture of L692 so you can see what I'm seeing. I have a spare out of the 7B50 parts unit which I have already removed. I haven't yet changed any parts, but I was about to put some Nichicon PW caps in to replace these old, bad Nippon SL's and replace L692. The PW's are radial so I was going to shrink wrap them in axial form. (I only have VX 2ohmESR axials.)

What are your thoughts about this?
I'm just a bit iffy about whether I should use without replacing what is visually bad first.
I should have just paid another $20 and got a very-likely-good 7B85.
A different 7B85 would likely have the same age related problem. Bad
aluminum electrolytic capacitors in a 7B85 are not going to cause it
to fail and will not even be noticeable without exacting performance
tests.

I can't remember the axial equivalent of Nichi's PW series. Do you happen to know it off hand?
That is easy; there is no equivalent or at least not an inexpensive
one.

The variety for axial capacitors is pretty limited now and while you
can find low ESR axial aluminum electrolytics, they are much more
expensive than radial units.

I do what you are suggesting; I use a radial capacitor, insulate one
lead, and then bend that lead around to fit into the spot originally
occupied by the axial capacitor.

4.7 to 10 microfarad axial solid tantalum capacitors would also work
as replacements for the 10uF axial aluminum electrolytics. I would
actually expect them to work better.

I test new plug-ins in my 7603 which has a linear power supply.
I'd do the same with my 7613, but it's got some Z axis circuit problems I've yet to fix. I was considering raiding it for a card edge connector to make my own plugin extender with this 7B50. Then again, there's probably new card edge connectors on the market that I could use instead. I'd rather fix it anyway since it's got variable persistence and all that jazz.
The variable persistence of the 7613 is very useful. It would be
better to fix it in my opinion.

Does the 7B50 work? If so it could be used to test the 7854.

John Griessen <@jgriessen> who is active on
TekScopes@... sells 7000 extender kits and parts. I
bought 1 complete kit which I assembled myself and 2 sets of boards
and connectors to build 2 more extenders using my own wires:

http://ecosensory.com/tek/tek_7K_flex_sales_blurb.txt

I do not think we know enough yet. Assuming that the 7B85 works, it
will be able to rule out or confirm problems with the 7B87.

I still think you should leave the 7854 running for a couple more days
under supervision. From your reports, it sounds like the intensity
blanking problem is getting better.
I've had it powered on for 2 hours so far and have not yet been able to induce a fault. I don't leave the intensity up with the waveform still for more than 2 or 3 minutes at a time. I'm thinking about finding a project to start working on and just using it. I'm thinking that regular use might be the only way to find out if the problem is persistent or just a temporary thing.
At this point the only thing I know is not working quite right is the
beam finder in regards to the vertical limiting.

With two timebases, you can set them up to generate a raster allowing
higher brightness for testing without damaging the CRT.

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 


I just happen to still have the 7B85 on my mind since I just fixed
>mine.
>
>Note that there are two major versions of the 7B85 and the earlier
>version may or may not have some changes. Both of mine are the
>earlier ones and one has changes and one does not.
>

Mine is the earlier version. It's SN B088223.. just at the end of that version's production run. The hybrid on the DVM board has a 2009 date code and the unit was previously owned by Magnavox, so I would have a guess that it's been fairly well taken care of and calibrated.

>The scans of the service manual that I have including the Artek one
>are not very good.

I don't like the Artek schematic scans for this unit since they are split up into separate pages. Tekwiki's link to the SM has some good ones.

>None of the solid tantalum capacitors on that board can short the
>power supply damaging L692. Solid tantalum C683 is a coupling
>capacitor. The two added on solid tantalum capacitors if your 7B85
>has them are filtering for the -5 volt regulator. I guess early
>versions had these added on and then they removed them later.
>
>I assume you mean ESR of the aluminum electrolytics. They are only
>used for bulk local decoupling so you will not need to replace them to
>test the board. High ESR may only affect performance slightly. The
>solid tantalums should not have changed in ESR.
>

I'm uploading a picture of L692 so you can see what I'm seeing. I have a spare out of the 7B50 parts unit which I have already removed. I haven't yet changed any parts, but I was about to put some Nichicon PW caps in to replace these old, bad Nippon SL's and replace L692. The PW's are radial so I was going to shrink wrap them in axial form. (I only have VX 2ohmESR axials.)

What are your thoughts about this?
I'm just a bit iffy about whether I should use without replacing what is visually bad first.
I should have just paid another $20 and got a very-likely-good 7B85.

I can't remember the axial equivalent of Nichi's PW series. Do you happen to know it off hand?


I test new plug-ins in my 7603 which has a linear power supply.
>

I'd do the same with my 7613, but it's got some Z axis circuit problems I've yet to fix. I was considering raiding it for a card edge connector to make my own plugin extender with this 7B50. Then again, there's probably new card edge connectors on the market that I could use instead. I'd rather fix it anyway since it's got variable persistence and all that jazz.


I do not think we know enough yet. Assuming that the 7B85 works, it
>will be able to rule out or confirm problems with the 7B87.
>
>I still think you should leave the 7854 running for a couple more days
>under supervision. From your reports, it sounds like the intensity
>blanking problem is getting better.
I've had it powered on for 2 hours so far and have not yet been able to induce a fault. I don't leave the intensity up with the waveform still for more than 2 or 3 minutes at a time. I'm thinking about finding a project to start working on and just using it. I'm thinking that regular use might be the only way to find out if the problem is persistent or just a temporary thing.

Re: Excessive Mailing List Bandwidth

Tom Gardner
 

On 03/03/16 23:39, analogaddict013@... [TekScopes] wrote:
The only issue I see with my own activity in this 7854 thread is that I had been posting multiple consecutive posts rapidly when I could definitely be waiting 5 minutes longer to make sure I've included all the info I want to post all at one time.
That's one mistake I've never made. Oh no, never ever. Perish the thought :)

But at least I do /try/ to make /new/ mistakes.

Re: Tek 7854 Info, Repair, Restore

 

On 03 Mar 2016 15:07:56 -0800, you wrote:

My "Not tested but from a working scope" 7B85 arrived.
I just happen to still have the 7B85 on my mind since I just fixed
mine.

Note that there are two major versions of the 7B85 and the earlier
version may or may not have some changes. Both of mine are the
earlier ones and one has changes and one does not.

The scans of the service manual that I have including the Artek one
are not very good.

Upon visual inspection, I see that L692 is looking rather sad like it got so hot that it burned off it's coating, so I am checking lytic and tant ESR before using it. I already found a couple that are in need of replacement. They aren't so bad that I would expect immediate failure, but bad enough to just replace first. They are 2x the ESR I'd expect for a 10uF 25V.

Hopefully L692 isn't dead. I don't have an L meter, but can rig something up with the scope/FG if need be - If I don't have a new or used replacement lying around here somewhere.
None of the solid tantalum capacitors on that board can short the
power supply damaging L692. Solid tantalum C683 is a coupling
capacitor. The two added on solid tantalum capacitors if your 7B85
has them are filtering for the -5 volt regulator. I guess early
versions had these added on and then they removed them later.

I assume you mean ESR of the aluminum electrolytics. They are only
used for bulk local decoupling so you will not need to replace them to
test the board. High ESR may only affect performance slightly. The
solid tantalums should not have changed in ESR.

I probably shouldn't have bought a $20 unit, but oh well. If I have to buy another, I'll take it as another lesson learned.

It will probably be about an hour before I fire it up, but in the meantime the scopes running on Right/B with 7A29 and 7B87. No failure yet with comfortable viewing intensity.
I test new plug-ins in my 7603 which has a linear power supply.

I'm still here and still at it - and am open to any suggestions for identifying the trouble circuit and likely culprit(s). I want to get the issue well documented and narrow down the number of circuits I need to probe at and check before I open the scope up.
I do not think we know enough yet. Assuming that the 7B85 works, it
will be able to rule out or confirm problems with the 7B87.

I still think you should leave the 7854 running for a couple more days
under supervision. From your reports, it sounds like the intensity
blanking problem is getting better.

Re: Excessive Mailing List Bandwidth

Brian Bloom
 

I for one enjoy the back and forth of semi-interactive troubleshooting
>threads like the one here a lot. The process and the background information
>are both interesting to me.


As do I - especially since I'm on the experiencing end of the troubleshooting process of this scope. Being so, I see the full value of fast replies and lots of interaction. It's the difference between waiting hours or days for other people's feedback and perspectives on what the real issues are, what to expect when performing a certain task since I've never used this scope before, etc etc.

The only issue I see with my own activity in this 7854 thread is that I had been posting multiple consecutive posts rapidly when I could definitely be waiting 5 minutes longer to make sure I've included all the info I want to post all at one time.

Re: Excessive Mailing List Bandwidth

Siggi
 

I for one enjoy the back and forth of semi-interactive troubleshooting
threads like the one here a lot. The process and the background information
are both interesting to me.

On Wed, Mar 2, 2016, 22:28 David @DWH [TekScopes] <
TekScopes@...> wrote:



There are others on the list who may have suggestions which would be
missed by moving to private email and I do make an effort to combine
multiple replies into one message. Private messages are lost to the
archive and not available for searching.

Re: Tek 7854 Info, Repair, Restore

Brian Bloom
 

My "Not tested but from a working scope" 7B85 arrived.

Upon visual inspection, I see that L692 is looking rather sad like it got so hot that it burned off it's coating, so I am checking lytic and tant ESR before using it. I already found a couple that are in need of replacement. They aren't so bad that I would expect immediate failure, but bad enough to just replace first. They are 2x the ESR I'd expect for a 10uF 25V.

Hopefully L692 isn't dead. I don't have an L meter, but can rig something up with the scope/FG if need be - If I don't have a new or used replacement lying around here somewhere.

I probably shouldn't have bought a $20 unit, but oh well. If I have to buy another, I'll take it as another lesson learned.

It will probably be about an hour before I fire it up, but in the meantime the scopes running on Right/B with 7A29 and 7B87. No failure yet with comfortable viewing intensity.

I'm still here and still at it - and am open to any suggestions for identifying the trouble circuit and likely culprit(s). I want to get the issue well documented and narrow down the number of circuits I need to probe at and check before I open the scope up.

Re: Tek 465 intensity problem

Bill (Doc) Courtright
 

All,
The way I have always looked at is that a Scope is the only way to see what the electrons are doing in a circuit. Then you need another one as backup and to do any service on the first one. Around the mid 90's the 5 and 7K series were so plentiful at Hamfests and Fleas I picked up several parts donors for next to nothing and several working mainframes to set up test specific sections of the growing workbench. Now 20 years later most need to be gone over and brought back up to spec and function.
Bill'
KB3DKS

-----Original Message-----

From: Jochens Feldhaar jochen_feldhaar@... [TekScopes] <TekScopes@...>
To: TekScopes <TekScopes@...>
Sent: Thu, Mar 3, 2016 2:34 pm
Subject: Re: [TekScopes] Re: Tek 465 intensity problem

Hi Jon,

there is no need at all to feel intimidated, Even here in Germany, I
know of several persons that have a _lot_ more of Tek Scopes. By this
measure, I am at best a mediocre collector of fine Scopes.

A nice event occurred when I got new neighbours: They thought that I had
to be some kind of a heart surgeon because of the many heart monitors in
my living room (make that 22 oscilloscopes, 20 Tek, 1 HP, 1 Hameg)

And yes, I also look for one or two more Scopes, I am fully addicted to
"Scope Fever"

Regards, Jochen DH6FAZ

Re: Tek 465 intensity problem

Jokken Feldhaar
 

Hi Jon,

there is no need at all to feel intimidated, Even here in Germany, I know of several persons that have a _lot_ more of Tek Scopes. By this measure, I am at best a mediocre collector of fine Scopes.

A nice event occurred when I got new neighbours: They thought that I had to be some kind of a heart surgeon because of the many heart monitors in my living room (make that 22 oscilloscopes, 20 Tek, 1 HP, 1 Hameg)

And yes, I also look for one or two more Scopes, I am fully addicted to "Scope Fever"

Regards, Jochen DH6FAZ

Am 03.03.2016 um 20:19 schrieb jonbatters32@... [TekScopes]:

Hi Jochens,

29 Teks’, I feel intimidated. Think how bad that man feels struggling to
get by with only 3. I have to get by the best I can with only 6. The
older units like the 466/DM44 I consider art pieces and enjoy looking at
them and pull a different one out each time I need a scope. And, if one
fails, Oh Shucky Darn I have to ( get to ) stop what I’m doing and start
troubleshooting it, Oh Joy.

I think the group would really enjoy seeing some photos of your shop.
Jon Batters, Grants Pass Or.

Sent from Mail for Windows 10

From: Jochens Feldhaar jochen_feldhaar@... [TekScopes]
Sent: Thursday, March 3, 2016 10:40 AM
To: TekScopes@...
Subject: Re: [TekScopes] Re: Tek 465 intensity problem

Hi Raymond,

you're welcome!
I have learned so much by subscribing to those lists, so I try to be
helpful if I know something about instruments I own.
I have 29 Tek here, some HP gear, some Hameg gear (worked there) and a
lot of other instruments that make my life worthwhile..... feels good

Regards, Jochen DH6FAZ

Am 03.03.2016 um 19:19 schrieb @Raymond [TekScopes]:
> Hi Jochen,
> > thanked people for their responses, including you.
> >
> Correction: I didn't thank you. I should have, because you were quite
> explicit and made me seek confirmation on the HP Agilent forum. I know
> it takes effort to decide and make a contribution, so hereby!
>
> Raymond
>
>
>

------------------------------------

------------------------------------

------------------------------------

Yahoo Groups Links


Re: Tek 465 intensity problem

Jon Batters
 

Hi Jochens,

29 Teks’, I feel intimidated. Think how bad that man feels struggling to get by with only 3. I have to get by the best I can with only 6. The older units like the 466/DM44 I consider art pieces and enjoy looking at them and pull a different one out each time I need a scope. And, if one fails, Oh Shucky Darn I have to ( get to ) stop what I’m doing and start troubleshooting it, Oh Joy.

I think the group would really enjoy seeing some photos of your shop. Jon Batters, Grants Pass Or.

Sent from Mail for Windows 10

From: Jochens Feldhaar jochen_feldhaar@... [TekScopes]
Sent: Thursday, March 3, 2016 10:40 AM
To: TekScopes@...
Subject: Re: [TekScopes] Re: Tek 465 intensity problem

Hi Raymond,

you're welcome!
I have learned so much by subscribing to those lists, so I try to be
helpful if I know something about instruments I own.
I have 29 Tek here, some HP gear, some Hameg gear (worked there) and a
lot of other instruments that make my life worthwhile..... feels good

Regards, Jochen DH6FAZ

Am 03.03.2016 um 19:19 schrieb @Raymond [TekScopes]:
Hi Jochen,
> thanked people for their responses, including you.
>
Correction: I didn't thank you. I should have, because you were quite
explicit and made me seek confirmation on the HP Agilent forum. I know
it takes effort to decide and make a contribution, so hereby!

Raymond




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Re: Tek 465 intensity problem

 

instruments that make my life worthwhile..... feels good
Same here!

Raymond

Re: Tek 465 intensity problem

Jokken Feldhaar
 

Hi Raymond,

you're welcome!
I have learned so much by subscribing to those lists, so I try to be helpful if I know something about instruments I own.
I have 29 Tek here, some HP gear, some Hameg gear (worked there) and a lot of other instruments that make my life worthwhile..... feels good

Regards, Jochen DH6FAZ

Am 03.03.2016 um 19:19 schrieb @Raymond [TekScopes]:

Hi Jochen,
> thanked people for their responses, including you.
>
Correction: I didn't thank you. I should have, because you were quite
explicit and made me seek confirmation on the HP Agilent forum. I know
it takes effort to decide and make a contribution, so hereby!

Raymond