Date   

Re: 1S1 sampling unit; (also 7B53AN & 7A18 plugins)

Jim Ford
 

I believe it, Harvey.  A former coworker had experimented with tubes, and he said that while you can run the filaments from A.C., try D.C. for audio; you'll like it.Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Harvey White <madyn@dragonworks.info> Date: 9/2/20 7:01 PM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] 1S1 sampling unit; (also 7B53AN & 7A18 plugins) I once had a Heathkit OM3, which had a horrible hum problem (eventually).  I solved it by running the filaments off DC.  If you ever have that problem, I can suggest it.  The IO-14 was billed as a lab scope, I think.HarveyOn 9/2/2020 9:19 PM, David Collier wrote:> Hi Garth,> I'm in Canberra (Oz).> Some US sellers won't ship to Oz, a few charge ridiculous shipping of US$400 to 500, which is where they hope to profit!> A Heathkit IO-14 from USA is costing me US$50 carriage via the Global Shipping Program, which seems very inexpensive.> David C.>> >>


Re: 1S1 sampling unit; (also 7B53AN & 7A18 plugins)

Harvey White
 

I once had a Heathkit OM3, which had a horrible hum problem (eventually).  I solved it by running the filaments off DC.  If you ever have that problem, I can suggest it.  The IO-14 was billed as a lab scope, I think.

Harvey

On 9/2/2020 9:19 PM, David Collier wrote:
Hi Garth,
I'm in Canberra (Oz).
Some US sellers won't ship to Oz, a few charge ridiculous shipping of US$400 to 500, which is where they hope to profit!
A Heathkit IO-14 from USA is costing me US$50 carriage via the Global Shipping Program, which seems very inexpensive.
David C.



Re: 1S1 sampling unit; (also 7B53AN & 7A18 plugins)

 

Thanks Thomas,
Happy to swap my HP1740A for a Tek!


Re: 1S1 sampling unit; (also 7B53AN & 7A18 plugins)

 

Hi Garth,
I'm in Canberra (Oz).
Some US sellers won't ship to Oz, a few charge ridiculous shipping of US$400 to 500, which is where they hope to profit!
A Heathkit IO-14 from USA is costing me US$50 carriage via the Global Shipping Program, which seems very inexpensive.
David C.


Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

Morris Odell
 

Thanks for the mention Dennis and your efforts as a moderator. I've really enjoyed being a member of this group and look forward to the daily digest I receive. The knowledge and helpfulness of the other members here is a great resource. I also enjoy helping other when I can too.

I hope this group continues for a long tiome to come!

Morris Odell VK3DOC locked down in Melbourne, Australia


Re: TWD 120's FREE

Thomas Garson
 

Charlie,

Well, I have SCSI adapters galore, and an operating PC running Windows 98, necessary for operation of a legacy DSP analyzer (PC bus hardware). So, I have a system that could PROBABLY work with it. There is already a Tek analog scope on that bench, but the storage capability could be handy.

If no one more needy puts up their hand, I would take one of those.
Zip code 97520.

Thomas Garson
Aural Technology, Ashland, OR
By my calculation, the dynamic range of the universe is roughly 679dB,
which is approximately 225 bits, collected at a rate 1.714287514x10^23 sps.

On 9/2/20 1:24 PM, Charlie Conger wrote:
I just found one, maybe two, complete TWD120's while unpacking after a move. These had been missing for years. These are 100 Mhz 2channel Digital Storage Digitizers originally made for GE medical. They require a PC to act as a display to be fully functional. As I last recall these were fully functional the last time I used them.
see here for more details
http://w140.com/tekwiki/wiki/TWD120
If anyone is interested PM me and I will be happy to send for cost of shipping.


Re: TWD 120's FREE

Charlie Conger
 

It only uses SCSI. At the bottom of the WIKI here is a link to guy who has sorted out the OS issues and fixes for them. It is a mixed bag but free is a very good price. It has basically the same functionality as the old TDS400 scopes which were my favorite low cost TDS.


Re: TWD 120's FREE

G Hopper
 

Looks like an interesting bit of hardware.

Does it use all three interfaces to communicate with the PC (as listed in
the wiki)? or just the SCSI: " Adaptec ASPI SCSI driver is required for
the software to communicate with the digitizer. SCSI configuration can be
tricky." and the serial and parallel were for other things?

That it was designed to work with windows 3.1 and becomes a tough thing to
keep operational as OSes progressed is why these PC based scopes are such a
mixed bag. Makes me glad I have older hardware based scopes. :-)

On Wed, Sep 2, 2020 at 1:24 PM Charlie Conger <ctconger@gmail.com> wrote:

I just found one, maybe two, complete TWD120's while unpacking after a
move. These had been missing for years. These are 100 Mhz 2channel Digital
Storage Digitizers originally made for GE medical. They require a PC to act
as a display to be fully functional. As I last recall these were fully
functional the last time I used them.

see here for more details
http://w140.com/tekwiki/wiki/TWD120

If anyone is interested PM me and I will be happy to send for cost of
shipping.




Re: Strange Tek2440 issue

Vince Vielhaber
 

On 09/02/2020 02:50 PM, Siggi wrote:
On Wed, Sep 2, 2020 at 2:07 PM Vince Vielhaber <vev@michvhf.com> wrote:

I had actually done that last nite, but didn't have the parts layout
handy to see which probe was on which pin (I had them on the diodes>.

Here they are with voltage measurements:

http://www.hamradio.fun/pix/2440.html

Uh, this makes no sense to me.
The base of Q870 should be pulled toward +15V unreg through R864(? hard to
read on the schematic), and the two op amps shunt it towards ground when
they detect too high voltage or too high current, respectively. Whichever
of pins 1/7 is lower is the op-amp in control of the output.

... time passes ...

Yeah, still doesn't make sense to me. I'm going to guess that either the
op-amps are (pins 1/7 are) reversed on the schematic, or that your channel
designations are.
Double checked, followed the foil, Channel 2 is definitely on pin 1.

I got the power supply board out right now so it's definitely going to see some new caps. I'll also take a real close look at Q870 and Q879.

I measured R478 with a 4 wire ohmmeter and it's 10.01. Haven't checked any of the other ... yet.

I did look at the +8 and _15v rails as well as the 5V unreg and the +10 ref. All were ok with both the voltmeter and the scope. While the board's out I'm also going to track down U870's inputs to see if something's backward in the schematic.

More later!
Thanks!
Vince.


Even so, it still doesn't make sense, as the voltage-control op-amp starts
dialing more voltage (Channel 2 normal at 5.54V rises to 16.94V), while the
current limit op-amp goes on the limit (Channel 1 normal at 16.76V dips to
6.16V). What doesn't make sense here is that the current control op-amp is
dialing a voltage that exceeds the voltage control's usual/normal voltage.
I haven't done the maths, but as there's a bias on the current limit
op-amp's feedback input, it might be that it's simply kicking in because
the output voltage has sagged.

I think you need to look further afield, how's the +8V rail doing,
the +-15V rails, raw and regulated? How is the -5V rail doing? Any other
rails you can find...

If you can't find a bad rail, start looking at the biasing for Q870 & Q879,
have the resistors drifted? If R864(?) or R478 have drifted significantly
upward, that'd explain why the transistors can't meet the current demand.
If the biasing is OK, you need to look at the transistors themselves. If
their gain is down, that'd also explain things. You can measure the base
current to Q879 indirectly by the voltage drop over its base resistor. Even
looking at what's happening on Q870's emitter under collapse - is that
transistor going to saturation, indicating that Q879 is dozing off on the
job?

Good luck!

--
K8ZW http://www.metalworkingfun.com http://www.hamradio.fun


TWD 120's FREE

Charlie Conger
 

I just found one, maybe two, complete TWD120's while unpacking after a move. These had been missing for years. These are 100 Mhz 2channel Digital Storage Digitizers originally made for GE medical. They require a PC to act as a display to be fully functional. As I last recall these were fully functional the last time I used them.

see here for more details
http://w140.com/tekwiki/wiki/TWD120

If anyone is interested PM me and I will be happy to send for cost of shipping.


Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

n4buq
 

Hmmm. Mine shows I joined 09/30/03 (Account -> Identity - Account Profile). I must've been a lurker for a while.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dave Daniel" <kc0wjn@gmail.com>
To: TekScopes@groups.io
Sent: Wednesday, September 2, 2020 2:49:40 PM
Subject: Re: [TekScopes] HAPPY 20th BIRTHDAY TEKSCOPES!!!

Oh. Duh. The date is on the “personal” under “Account Settings”.

On Sep 2, 2020, at 15:45, n4buq <n4buq@knology.net> wrote:

I searched for my member ID. Apparently I joined on or about April 7,
2004.

I smile when I see that I asked my first Tek question and the second reply
was from none other than Stan Griffiths. Then I see my reply to his
saying "Yes, you are correct". How embarrassing. I didn't know who he
was at the time.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dave Daniel" <kc0wjn@gmail.com>
To: TekScopes@groups.io
Sent: Wednesday, September 2, 2020 2:40:10 PM
Subject: Re: [TekScopes] HAPPY 20th BIRTHDAY TEKSCOPES!!!

Is there a way to figure out when one joined the original (Yahoo groups)
list?

DaveD

On Sep 2, 2020, at 14:06, Dennis Tillman W7pF <dennis@ridesoft.com>
wrote:

Michael Dunn started TekScopes 20 years ago on August 31, 2000. There was
just one post that day from Walter Shawlee who joined that same day and
he
has been an active member ever since.

To Walter: Thank you for 20 years of contributions to TekScopes and for
all
the parts and instruments you have on your web site!

* Three days later Stan Griffiths W7NI (RIP) joined.
* Three more members, including Tom Gootee, joined in October, 2000.
* By the end of 2000 there were 13 members.
* A year later it was clearly important: there were 68 members and >150
posts each month. John Miles and Morris Odell joined TekScopes in that
first
year.

To John and Morris: Thank you for your regular contributions over the 19
years you have been members!

* I was a late comer. When I joined in mid-November 2002 there were
already
250 members. I was looking for something like this for a long time and I
jumped right in with my first post that same day. Apparently I have been
busy ever since I joined - I just noticed this will be my 5,000th post
since
I joined.

Today we have over 8,000 members worldwide and there are 500 to 1500
posts
per month.

Thank you, Michael Dunn, for realizing the need for a Tektronix support
group, for all you did to keep it going the first 17 years, and for being
there for me when I need occasional help and/or guidance as I continue to
moderate it.

Dennis Tillman W7pF








Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

Dave Daniel
 

Oh. Duh. The date is on the “personal” under “Account Settings”.

On Sep 2, 2020, at 15:45, n4buq <n4buq@knology.net> wrote:

I searched for my member ID. Apparently I joined on or about April 7, 2004.

I smile when I see that I asked my first Tek question and the second reply was from none other than Stan Griffiths. Then I see my reply to his saying "Yes, you are correct". How embarrassing. I didn't know who he was at the time.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dave Daniel" <kc0wjn@gmail.com>
To: TekScopes@groups.io
Sent: Wednesday, September 2, 2020 2:40:10 PM
Subject: Re: [TekScopes] HAPPY 20th BIRTHDAY TEKSCOPES!!!

Is there a way to figure out when one joined the original (Yahoo groups)
list?

DaveD

On Sep 2, 2020, at 14:06, Dennis Tillman W7pF <dennis@ridesoft.com> wrote:

Michael Dunn started TekScopes 20 years ago on August 31, 2000. There was
just one post that day from Walter Shawlee who joined that same day and he
has been an active member ever since.

To Walter: Thank you for 20 years of contributions to TekScopes and for all
the parts and instruments you have on your web site!

* Three days later Stan Griffiths W7NI (RIP) joined.
* Three more members, including Tom Gootee, joined in October, 2000.
* By the end of 2000 there were 13 members.
* A year later it was clearly important: there were 68 members and >150
posts each month. John Miles and Morris Odell joined TekScopes in that
first
year.

To John and Morris: Thank you for your regular contributions over the 19
years you have been members!

* I was a late comer. When I joined in mid-November 2002 there were already
250 members. I was looking for something like this for a long time and I
jumped right in with my first post that same day. Apparently I have been
busy ever since I joined - I just noticed this will be my 5,000th post
since
I joined.

Today we have over 8,000 members worldwide and there are 500 to 1500 posts
per month.

Thank you, Michael Dunn, for realizing the need for a Tektronix support
group, for all you did to keep it going the first 17 years, and for being
there for me when I need occasional help and/or guidance as I continue to
moderate it.

Dennis Tillman W7pF






Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

n4buq
 

I searched for my member ID. Apparently I joined on or about April 7, 2004.

I smile when I see that I asked my first Tek question and the second reply was from none other than Stan Griffiths. Then I see my reply to his saying "Yes, you are correct". How embarrassing. I didn't know who he was at the time.

Thanks,
Barry - N4BUQ

----- Original Message -----
From: "Dave Daniel" <kc0wjn@gmail.com>
To: TekScopes@groups.io
Sent: Wednesday, September 2, 2020 2:40:10 PM
Subject: Re: [TekScopes] HAPPY 20th BIRTHDAY TEKSCOPES!!!

Is there a way to figure out when one joined the original (Yahoo groups)
list?

DaveD

On Sep 2, 2020, at 14:06, Dennis Tillman W7pF <dennis@ridesoft.com> wrote:

Michael Dunn started TekScopes 20 years ago on August 31, 2000. There was
just one post that day from Walter Shawlee who joined that same day and he
has been an active member ever since.

To Walter: Thank you for 20 years of contributions to TekScopes and for all
the parts and instruments you have on your web site!

* Three days later Stan Griffiths W7NI (RIP) joined.
* Three more members, including Tom Gootee, joined in October, 2000.
* By the end of 2000 there were 13 members.
* A year later it was clearly important: there were 68 members and >150
posts each month. John Miles and Morris Odell joined TekScopes in that
first
year.

To John and Morris: Thank you for your regular contributions over the 19
years you have been members!

* I was a late comer. When I joined in mid-November 2002 there were already
250 members. I was looking for something like this for a long time and I
jumped right in with my first post that same day. Apparently I have been
busy ever since I joined - I just noticed this will be my 5,000th post
since
I joined.

Today we have over 8,000 members worldwide and there are 500 to 1500 posts
per month.

Thank you, Michael Dunn, for realizing the need for a Tektronix support
group, for all you did to keep it going the first 17 years, and for being
there for me when I need occasional help and/or guidance as I continue to
moderate it.

Dennis Tillman W7pF





Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

Dave Daniel
 

Is there a way to figure out when one joined the original (Yahoo groups) list?

DaveD

On Sep 2, 2020, at 14:06, Dennis Tillman W7pF <dennis@ridesoft.com> wrote:

Michael Dunn started TekScopes 20 years ago on August 31, 2000. There was
just one post that day from Walter Shawlee who joined that same day and he
has been an active member ever since.

To Walter: Thank you for 20 years of contributions to TekScopes and for all
the parts and instruments you have on your web site!

* Three days later Stan Griffiths W7NI (RIP) joined.
* Three more members, including Tom Gootee, joined in October, 2000.
* By the end of 2000 there were 13 members.
* A year later it was clearly important: there were 68 members and >150
posts each month. John Miles and Morris Odell joined TekScopes in that first
year.

To John and Morris: Thank you for your regular contributions over the 19
years you have been members!

* I was a late comer. When I joined in mid-November 2002 there were already
250 members. I was looking for something like this for a long time and I
jumped right in with my first post that same day. Apparently I have been
busy ever since I joined - I just noticed this will be my 5,000th post since
I joined.

Today we have over 8,000 members worldwide and there are 500 to 1500 posts
per month.

Thank you, Michael Dunn, for realizing the need for a Tektronix support
group, for all you did to keep it going the first 17 years, and for being
there for me when I need occasional help and/or guidance as I continue to
moderate it.

Dennis Tillman W7pF



Re: HAPPY 20th BIRTHDAY TEKSCOPES!!!

Jim Ford
 

Thank you, Dennis, for moderating!  A very informative and enjoyable group, for sure.Jim Ford, member since late 2016 or early 2017 (can't remember exactly)Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Dennis Tillman W7pF <dennis@ridesoft.com> Date: 9/2/20 11:06 AM (GMT-08:00) To: TekScopes@groups.io Subject: [TekScopes] HAPPY 20th BIRTHDAY TEKSCOPES!!! Michael Dunn started TekScopes 20 years ago on August 31, 2000. There wasjust one post that day from Walter Shawlee who joined that same day and hehas been an active member ever since.To Walter: Thank you for 20 years of contributions to TekScopes and for allthe parts and instruments you have on your web site!* Three days later Stan Griffiths W7NI (RIP) joined.* Three more members, including Tom Gootee, joined in October, 2000.* By the end of 2000 there were 13 members.* A year later it was clearly important: there were 68 members and >150posts each month. John Miles and Morris Odell joined TekScopes in that firstyear. To John and Morris: Thank you for your regular contributions over the 19years you have been members!* I was a late comer. When I joined in mid-November 2002 there were already250 members. I was looking for something like this for a long time and Ijumped right in with my first post that same day. Apparently I have beenbusy ever since I joined - I just noticed this will be my 5,000th post sinceI joined.Today we have over 8,000 members worldwide and there are 500 to 1500 postsper month.Thank you, Michael Dunn, for realizing the need for a Tektronix supportgroup, for all you did to keep it going the first 17 years, and for beingthere for me when I need occasional help and/or guidance as I continue tomoderate it. Dennis Tillman W7pF


Re: Tek 7854 intermittent issues

Albert Otten
 

Hi Paul,

I think the "official" method is: set the 7B87 for single sweep [and wait until the Ready light is off], then press AQS at the 7854, then activate the 7B87 again by pressing the single sweep Reset button.
When I do so at 1024 P/W, then 0.5 ms/div works fine but 0.2 ms/div immediately gives a beep and error, even before I press the Reset button. No busy light and of course no need to stop acquisition. The previously acquired waveform is still displayed.
When follow the procedure at 0.5 ms/div, but just before pressing Reset change to 0.2 ms/div, then a waveform is acquired at 0.2 ms/div without error. But the waveform is far from perfect, with dots scattered around it and even with obvious outliers (as in one of Nick's photos).

According to my observations these results can also be obtained with the 7B87 in Norm mode, AQS at scope, and playing with trigger level to generate a single sweep. But this is a far less comfortable way since the trigger event is not well defined and switching from 0.5 ms/div to 0.2 ms/div [and faster] often produces a "false" trigger event.

Perhaps you can help Nick with his perhaps too hot transistor in the vertical amplifier. My 7854 has an EMI shielding option; the panels are difficult to remove and to install properly, so I had rather not do that.

Albert

On Wed, Sep 2, 2020 at 04:12 PM, Paul wrote:


Hi Albert -
On Tue, Sep 1, 2020 at 03:02 AM, Albert Otten wrote:
You probably tried AQS because I pointed to that. Something very strange is
going on with AQS in my 7854 (or with my brains?) AQS worked at 0.5 ms/div
but
not at 0.2 ms/div and faster. OK. Later on I thought to remember a trick to
mislead the scope: set trigger level for not triggering, then do AQS (the
scope waits...), then switch to faster sweep rate, then turn trigger level
produce a sweep. Somehow it didn't work, error all the time. I switched off
the scope and read the operators guide. AQS: works ONLY with 7B87! But I
used
a 7B80 (no 7B87 at all in the scope). And AQS just worked fine at 0.5
ms/div.
Back to the 7854 to do it once more. And this time AQS gave an error beep
all
the time!??
Are you doing single-sweep Acquisitions with the 7B87? Single-sweep uses the
7B87's internal sample clock, and I just checked on mine and confirmed that at
.5mS, the acquisition works fine, and beyond that, it's clocking too fast to
fill up the memory. If I do a single-sweep acquisition at .2mS, I'll see the
wave, but I have to hit stop for it to complete, and it beeps with an error.
I've got a seemingly working (knock on wood!) 7854 w/ a 7B85 & 7B87, so y'all
let me know if you need assistance checking measurements or behavior.

cheers,
Paul


Re: Strange Tek2440 issue

Siggi
 

On Wed, Sep 2, 2020 at 2:50 PM Siggi via groups.io <siggi=undo.com@groups.io>
wrote:

On Wed, Sep 2, 2020 at 2:07 PM Vince Vielhaber <vev@michvhf.com> wrote:

I had actually done that last nite, but didn't have the parts layout
handy to see which probe was on which pin (I had them on the diodes>.

Here they are with voltage measurements:

http://www.hamradio.fun/pix/2440.html

Uh, this makes no sense to me.
As an aside, love the pics of the warm green glow of the CRT :).


Re: Strange Tek2440 issue

Siggi
 

On Wed, Sep 2, 2020 at 2:07 PM Vince Vielhaber <vev@michvhf.com> wrote:

I had actually done that last nite, but didn't have the parts layout
handy to see which probe was on which pin (I had them on the diodes>.

Here they are with voltage measurements:

http://www.hamradio.fun/pix/2440.html

Uh, this makes no sense to me.
The base of Q870 should be pulled toward +15V unreg through R864(? hard to
read on the schematic), and the two op amps shunt it towards ground when
they detect too high voltage or too high current, respectively. Whichever
of pins 1/7 is lower is the op-amp in control of the output.

... time passes ...

Yeah, still doesn't make sense to me. I'm going to guess that either the
op-amps are (pins 1/7 are) reversed on the schematic, or that your channel
designations are.
Even so, it still doesn't make sense, as the voltage-control op-amp starts
dialing more voltage (Channel 2 normal at 5.54V rises to 16.94V), while the
current limit op-amp goes on the limit (Channel 1 normal at 16.76V dips to
6.16V). What doesn't make sense here is that the current control op-amp is
dialing a voltage that exceeds the voltage control's usual/normal voltage.
I haven't done the maths, but as there's a bias on the current limit
op-amp's feedback input, it might be that it's simply kicking in because
the output voltage has sagged.

I think you need to look further afield, how's the +8V rail doing,
the +-15V rails, raw and regulated? How is the -5V rail doing? Any other
rails you can find...

If you can't find a bad rail, start looking at the biasing for Q870 & Q879,
have the resistors drifted? If R864(?) or R478 have drifted significantly
upward, that'd explain why the transistors can't meet the current demand.
If the biasing is OK, you need to look at the transistors themselves. If
their gain is down, that'd also explain things. You can measure the base
current to Q879 indirectly by the voltage drop over its base resistor. Even
looking at what's happening on Q870's emitter under collapse - is that
transistor going to saturation, indicating that Q879 is dozing off on the
job?

Good luck!


Re: Strange Tek2440 issue

Vince Vielhaber
 

I had actually done that last nite, but didn't have the parts layout handy to see which probe was on which pin (I had them on the diodes>.

Here they are with voltage measurements:

http://www.hamradio.fun/pix/2440.html

Thanks!
Vince.

On 09/02/2020 01:25 PM, Siggi wrote:
On Tue, Sep 1, 2020 at 10:06 PM Vince Vielhaber <vev@michvhf.com> wrote:

Both the voltmeter and the 2430A. There's not much garbage on it but I
did hang another cap on it and it made no difference.
Here is a shot of both sides of R873 on the 2430A. At power off, both
traces are together. The top one is the at the junction of R873, R876,
Q879 E. The lower one is on the C494 side. This was caught just when
the sweep was turned to 100ns/div. I quickly hit Save when it happened.

http://www.hamradio.fun/pix/R873.jpg

I guess next up is to capture U870 pins 1 & 7, see what's up there when
your rail collapses.
On one hand, you could be hitting the current limit, which could be because
of actual overcurrent, or because the resistor network on U870A pin 2 has
drifted. Also the -5V rail could be compromised, as the current limiter is
referenced to that. Also check all the other rails, as the +5 needs the +8
to be up and sound as that's where Q870 draws from.

On the other hand it could be that Q870/Q879 have degraded and can no
longer do the lifting required.


HAPPY 20th BIRTHDAY TEKSCOPES!!!

 

Michael Dunn started TekScopes 20 years ago on August 31, 2000. There was
just one post that day from Walter Shawlee who joined that same day and he
has been an active member ever since.

To Walter: Thank you for 20 years of contributions to TekScopes and for all
the parts and instruments you have on your web site!

* Three days later Stan Griffiths W7NI (RIP) joined.
* Three more members, including Tom Gootee, joined in October, 2000.
* By the end of 2000 there were 13 members.
* A year later it was clearly important: there were 68 members and >150
posts each month. John Miles and Morris Odell joined TekScopes in that first
year.

To John and Morris: Thank you for your regular contributions over the 19
years you have been members!

* I was a late comer. When I joined in mid-November 2002 there were already
250 members. I was looking for something like this for a long time and I
jumped right in with my first post that same day. Apparently I have been
busy ever since I joined - I just noticed this will be my 5,000th post since
I joined.

Today we have over 8,000 members worldwide and there are 500 to 1500 posts
per month.

Thank you, Michael Dunn, for realizing the need for a Tektronix support
group, for all you did to keep it going the first 17 years, and for being
there for me when I need occasional help and/or guidance as I continue to
moderate it.

Dennis Tillman W7pF

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