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I spoke so highly of my 571 last month. When I recently went to use it, I
was getting some artifacts in the display so I have set out to investigate.

Unfortunately you can tell this wasn't designed in Beaverton because you
have to remove the CRT to get the main board out. There are some large
Roedenstein electrolytics used for supply smoothing that have a bit of a
dome to the end of them. Not sure if these were flat when new, but they
don't appear to be leaky (neither physically nor electrically). There is
significant noise (100-200mVpp) on the supplies, but it's not line ripple.
It appears to be around 2 MHz and is two similarly disruptive pulses around
200ns out of phase.

In the process of disassembly, I have pulled and saved the three EPROM
images. Two run the 8032 controller, and one runs the NS405 "terminal on a
chip" that is used to draw the display and printer output.
I haven't exhaustively perused the images, but the graphics ROM has some
ASCII easter eggs I noticed. After the usual Tektronix copyright statement
is "Written by: Folkert ten Brummelhuis (started). Sjoerd J. Punter" and
soon after "[Makke yn Frysl?n]" which is Frisian for "Made in Friesland",
the province in which Heerenveen is situated. Later in the ROM the phrase
"Joke Mirjam Esther" appears twice, about (but not exactly) 64 bytes apart.
I believe these are three given names commonly used in the region, perhaps
the names of those endeared to one or both programmers.

Dave Casey

On Fri, Aug 21, 2020 at 1:31 PM Dave Casey via groups.io <polara413=
[email protected]> wrote:

I stand corrected; can confirm, my S/N also starts with H. Thanks!

Dave Casey

On Fri, Aug 21, 2020 at 5:12 AM zenith5106 <hahi@...> wrote:

On Fri, Aug 21, 2020 at 05:49 AM, Dave Casey wrote:

Built by Sony-Tektronix.

No,not Sony-Tek. It was built by Tek Netherlands (SN begin with H) and as
far as I remember it was also designed by them.

/H?kan

It's like Uber for scopes! If I ever find a 570 and can't retrieve it myself, I'll keep you in mind!
-Dave
On Wednesday, September 23, 2020, 03:32:29 PM PDT, Richard R. Pope <mechanic_2@...> wrote:
Hello all,
And this is why I offer a premium delivery service. Expensive but
the equipment is handled by just me. It will not be dropped, spindled,
nor mutilated and it is kept in a climate controlled environment. I
will pick up anywhere in the lower 48 and deliver to anywhere else in
the lower 48. Please contact off list for details?
GOD Bless Bless and Thanks,
rich!

On 9/23/2020 4:38 PM, John Williams wrote:

Good advice. Having shipped and received literally hundreds of tube scopes, there is always a few things overlooked. One that is ALWAYS overlooked is the crt. The crt in these old scopes is supported in only two places, that is the front panel and the rear socket. The front support is very rigid. The back support however is usually a white plastic ring that may be used to rotate the tube. Sadly this plastic is the kind that eventually hardens. It does not take much force to break it. Even time can cause it to fail. Now when the packed scope gets dropped by the carrier, and it WILL get dropped, the crt is unsupported and will usually break in half at the neck. All carriers use conveyor belts, and a package this size sometimes falls off the conveyor to the concrete floor. I have even seen the UPS driver, when picking up a box clearly marked fragile in 10 places actually THROW the box into his truck. CRTs are getting very hard to find, so if yours gets broken the whole scope may be junk.

I have also received scopes in their original Tektronix shipping box, unopened. There is no way this box could survive shipping conditions today. It always has to be packed inside another box.

I know of no easy answer to this. I have sometimes removed the crt and packed it separately in a proper Tektronix crt box. This is good but increases the cost. I have also received scopes with some packing material around the crt inside the mu-metal shield. As I recall this had limited success. Oh and btw no carrier will insure glass.

Any time you ship it is a crap shoot. All you can do is try to make sure your package can be dropped 6 feet onto concrete and you are ok. Maybe. Good luck.

I

Good advice. Having shipped and received literally hundreds of tube scopes, there is always a few things overlooked. One that is ALWAYS overlooked is the crt. The crt in these old scopes is supported in only two places, that is the front panel and the rear socket. The front support is very rigid.? The back support however is usually a white plastic ring that may be used to rotate the tube. Sadly this plastic is the kind that eventually hardens. It does not take much force to break it. Even time can cause it to fail. Now when the packed scope gets dropped by the carrier, and it WILL get dropped, the crt is unsupported and will usually break in half at the neck. All carriers use conveyor belts, and a package this size sometimes falls off the conveyor to the concrete floor. I have even seen the UPS driver, when picking up a box clearly marked fragile in 10 places actually THROW the box into his truck. CRTs are getting very hard to find, so if yours gets broken the whole scope may be junk.

I have also received scopes in their original Tektronix shipping box, unopened. There is no way this box could survive shipping conditions today. It always has to be packed inside another box.

I know of no easy answer to this. I have sometimes removed the crt and packed it separately in a proper Tektronix crt box. This is good but increases the cost. I have also received scopes with some packing material around the crt inside the mu-metal shield. As I recall this had limited success. Oh and btw no carrier will insure glass.

Any time you ship it is a crap shoot. All you can do is try to make sure your package can be dropped 6 feet onto concrete and you are ok. Maybe. Good luck.

I

On Sep 23, 2020, at 12:44 AM, Thomas Garson <tgarson@...> wrote:

?My "new to me" TWD120 arrived today. Thank you Charlie.

As Charlie advised in previous email, it did not pass self test, leaving the front panel LED unmistakably solid red.

However, the repurposed IBM laptop external power supply worked admirably so I dove into it.

After removing a number of screws and a cal sticker, I was presented with a single nice and compact SMD loaded PCB. No out-sourced PWM supplies for Tek. The regulator circuitry occupies a compact "can" in one corner.

As I was working w/o a schematic I had to find supply lines on some chips to check voltages. Voltages were good, but one was a bit noisy. DC to DC portion of supply looked good on (Tek 5000) scope. After sniffing around a bit (figure of speech. It did not smell) I noticed several Motorola T10N05e TO-263 type SMD packages near the supply wall, but outside of it. At first I was puzzled as I could find these parts for sale but no data sheet. Figured out they were N-channel power mosfet. I determined they were used for gates to enable/disable DC power feeding from the supply. Interesting. Squinting trough my trusty Swiss Army Knife magnifier (glass lens!) I noticed serious corrosion on the Source solder connection of one of those FETS (Q104: +8v line), which I theorized may have been the source of the noise I has seen. Reflowed the funky joint. Kicked on the power, waited a minute or so for self test to complete: Bingo! LED now turns Green!

That's as far as I got today. Next thing is I have to pull the software for it off of the floppy discs (fingers crossed) for copying over to the server and then burn a back up disk. After that, get my Win98SE PC set up with SCSI (not too big a deal as I used to do a lot of SCSI stuff) and see if I can actually get the thing to work. At the moment, I'm fairly optimistic this will happen in short order.

A few photos here:


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.

Good advice. Having shipped and received literally hundreds of tube scopes, there is always a few things overlooked. One that is ALWAYS overlooked is the crt. The crt in these old scopes is supported in only two places, that is the front panel and the rear socket. The front support is very rigid. The back support however is usually a white plastic ring that may be used to rotate the tube. Sadly this plastic is the kind that eventually hardens. It does not take much force to break it. Even time can cause it to fail. Now when the packed scope gets dropped by the carrier, and it WILL get dropped, the crt is unsupported and will usually break in half at the neck. All carriers use conveyor belts, and a package this size sometimes falls off the conveyor to the concrete floor. I have even seen the UPS driver, when picking up a box clearly marked fragile in 10 places actually THROW the box into his truck. CRTs are getting very hard to find, so if yours gets broken the whole scope may be junk.

I have also received scopes in their original Tektronix shipping box, unopened. There is no way this box could survive shipping conditions today. It always has to be packed inside another box.

I know of no easy answer to this. I have sometimes removed the crt and packed it separately in a proper Tektronix crt box. This is good but increases the cost. I have also received scopes with some packing material around the crt inside the mu-metal shield. As I recall this had limited success. Oh and btw no carrier will insure glass.

Any time you ship it is a crap shoot. All you can do is try to make sure your package can be dropped 6 feet onto concrete and you are ok. Maybe. Good luck.

I

There is a seller on ebay that has several 22xx covers at a reasonable price of ~ $30 each, and even sensible shipping that to me in FL shows up as $5.

He specifically states that "it will fit a 2213, and a 2225".

324227818105








.

Here's a page on a fabulous, late 570 I sold into Japan in 2000:



and here's a page detailing the crate I made to get there in one piece:



And, just for fun, a page of pix of the internals:



Bill @ PEARL, Inc.

Fedex and UPS pack things fairly well, I have not had any damage.
It can be pricey, but is usually less then traveling to pick something up.
Some people offering equipment demand that you pick it up from them. I
have accounts with both Fedex and UPS, that allows me to take care of
everything from my end and convince reluctant sellers to take items to
the stores. I ask everyone who demands pickup only to reconsider and be
willing to take the item to a shipper who will take care of the packing
and shipping.

Bruce Gentry, KA2IVY

On 23Sep, 2020, at 8:30 AM, Bill Riches via groups.io <bill.riches@...> wrote:

Depending on how many boxes you need check out Uline.? They have double wall boxes of all sizes.? Staples have some boxes that are better than the Amazon boxes.
73,
Bill, WA2DVUCape May, NJ
? ? On Wednesday, September 23, 2020, 10:26:12 AM EDT, Adam Beasley <abeasley@...> wrote:

Is there a good service to use to ship scopes?? The only boxes I have available are from Amazon and they are not very sturdy so I wouldn't trust shipping something heavy and expensive in them.

Thanks,
Adam

From: "stevenhorii" <sonodocsch@...>
To: [email protected]
Sent: Wednesday, September 23, 2020 12:43:55 PM
Subject: Re: [TekScopes] Shipping Scopes

If I can, I pack items myself and take them to UPS or FedEx for shipping.
Double-wall boxes are available at Home Depot and Lowes. They are usually
in the “moving supplies” aisle.

On 23Sep, 2020, at 8:30 AM, Bill Riches via groups.io <bill.riches@...> wrote:

Depending on how many boxes you need check out Uline. They have double wall boxes of all sizes. Staples have some boxes that are better than the Amazon boxes.
73,
Bill, WA2DVUCape May, NJ
On Wednesday, September 23, 2020, 10:26:12 AM EDT, Adam Beasley <abeasley@...> wrote:

Is there a good service to use to ship scopes? The only boxes I have available are from Amazon and they are not very sturdy so I wouldn't trust shipping something heavy and expensive in them.

Thanks,
Adam

From: "stevenhorii" <sonodocsch@...>
To: [email protected]
Sent: Wednesday, September 23, 2020 12:43:55 PM
Subject: Re: [TekScopes] Shipping Scopes

If I can, I pack items myself and take them to UPS or FedEx for shipping.
Double-wall boxes are available at Home Depot and Lowes. They are usually
in the “moving supplies” aisle.

If you are shipping a scope with plug-ins, remove the plug-ins and pack
them in a separate box. It may be more expensive, but my understanding is
that Tek always recommended shipping scopes with the plug-ins removed.
Besides less stress on the backplane connectors, packing the plug-ins
separately means you can pack them to better protect the knobs.

I probably overdo packing and it costs more both for the packing materials
and higher shipping weight but if you want an item to get to its
destination in good shape, pack well. UPS used to say to pack for a
four-foot drop onto concrete (a sign in the UPS store I used to use when I
was in Los Angeles and bought a lot of surplus electronic equipment).
Nothing I packed and sent home was ever damaged in shipping.

I bubble wrap the scope with at least a double layer over the front and
back. I buy the inexpensive white styrofoam insulation at the home
improvement stores. I have found that using a serrated knife works well (I
bought an inexpensive bread knife for this) to cut the foam to fit the box.
I will usually put an extra couple of layers of bubble under the bottom of
the scope. I always attach a label with the address of the recipient on it
to the wrapped scope or other item. If there are voids between the wrapped
scope and the foam lining, I fill that with more bubble. I hate using
styrofoam peanuts to fill voids, but there’s a trick I use so the recipient
does not spend a mess of time getting the peanuts out of the equipment or
off the floor. I put the styro peanuts into plastic bags (I use recyclable
grocery bags for this) and tie the bags off so the peanuts stay in them.
Sometimes, I put an empty bag in the voids if they are irregular in shape
and then pack the peanuts into them and tie them off. Loose peanuts also
“migrate” in the box and putting them in bags prevents this.

A couple of other tricks. Stretch wrap - I use that to hold the bubble
around the scope rather than taping it. It allows the bubble to be re-used
rather than thrown out. I have also used painter’s tape (“blue tape”) for
this as it is easily removable so also allows the bubble to be reused.

I tape the box shut with packing tape including the edges of the flaps
(keeps them from getting caught on the various sorting machines). I put the
label on the “top” side as that tends to stay right side up. Another trick
- write on the BOTTOM of the box - “This side DOWN”. The reason? If you
write “This side UP” on the top and the box is inverted, the shipper will
not see that. If it is bottom up, then the message that it is inverted is
clear.

For really heavy items (not heavy enough for freight) I staple the carton.
Years ago, I bought a carton stapler and a box of staples. I still am using
that first box of staples, but I still have it - only about a quarter used.

On Wed, Sep 23, 2020 at 10:43 greenboxmaven via groups.io <ka2ivy=
[email protected]> wrote:

Fedex and UPS pack things fairly well, I have not had any damage. It

can be pricey, but is usually less then traveling to pick something up.

Some people offering equipment demand that you pick it up from them. I

have accounts with both Fedex and UPS, that allows me to take care of

everything from my end and convince reluctant sellers to take items to

the stores. I ask everyone who demands pickup only to reconsider and be

willing to take the item to a shipper who will take care of the packing

and shipping.



Bruce Gentry, KA2IVY





On 9/23/20 10:31 AM, Eric wrote:

Ups , FedEx. At least in the US. Use heavy card board and at minimum 2

inches of loose padding all round for shock. I have gotten them double

boxes before and a 576 even in a wooden crate the trick is limiting

movement in the box I double boxed a high end computer it made it safely

to

California from the east side. But it was not cheap to ship. I have also

been successful crating things and shipping them freight. Plywood and

padding is wonder for protecting the device.

On Wed, Sep 23, 2020, 10:26 AM Adam Beasley <abeasley@...>

wrote:

Is there a good service to use to ship scopes? The only boxes I have

available are from Amazon and they are not very sturdy so I wouldn't

trust

shipping something heavy and expensive in them.

Thanks,

Adam