Date   

Re: TDS220 bootup??

Roy Thistle
 

TDS220 isn't colour ... so maybe you are seeing the ccfl? (trying to start, undercurrent?)

Anyway, I have a TDS220 from the dumpster... that probably should have stayed in the dumpster. (They are not really that good of an oscilloscope.)

I haven't posted about mine here. I wasn't sure there was going to be too many people that could help.
Not recommended for long term use... but, what happens if you connect it to a power bar with a switch.... and use the power bar switch to cycle it? (always keeping the on/off button on the top of the scope in the on position [pushed in])

--
Roy Thistle


Re: Tektronix Probe Replacement Parts and Accessories

teamlarryohio
 

Thank you Dennis!
-ls-


Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

-
 

Amazon did have an auction service when the first started but it
soon became clear that E-bay was going to dominate so Amazon completely
dropped their auction service. But I DO wish that they would reintroduce
it!

Originally Amazon and Ebay were very different and had very diffeent
markets. Amazon started off as just an online, fixed-price retailer with
large volumes of identical new items (originally just books) and they've
since opened up to other sellers of new identical items verses Ebay which
started out as purely an auction service for individuals that wanted to
sell their used items. But E-bay has now shifted their approach and are
trying to also attract retailers with large quantities of new identical
fixed-price items instead of individuals with a single used items.
Unfortunately for many of us, Ebay no longer attracts the sellers of used,
and originally very expensive when new, specialty items that we're looking
for.

On Fri, Apr 30, 2021 at 1:57 PM Roy Thistle <roy.thistle@mail.utoronto.ca>
wrote:

On Fri, Apr 30, 2021 at 07:39 AM, Dennis Tillman W7pF wrote:


It sounds like some of you feel entitled to be treated a certain way by
eBay
There are many on-line marketplaces... Amazon, PayPay Mall, Ebay,
Alibaba(AliExpress, Taobao) Rakuten, and others... but Amazon has about
twice the visits of all the rest put together... while Ebay gets about 1/4
of what Amazon does. Amazon dominates.

One reason why Amazon dominates might be because Amazon was quick to
become a buyer's market, with good support for buyers. Ebay was quite slow
to do that.

Sellers always complain about Ebay, and Ebay buyers: there's enough of it
on TekScopes, and copious threads on Reddit. But then some sellers are
still doing the same things that caused Ebay to become a buyer's market in
the first place.

The OP on this thread was pondering an alternative to Ebay. I reckon, I
don't see one... not with a global reach anyway. It's safe to say, greater
than 99% of the population considers what we have as being junk. Certainly,
the U.S. government... which originally paid for much of what we have
does... and institutions certainly do. Most Ebay competitors don't even
list it. So if Ebay stopped listing surplus, where would you sell?
--
Roy Thistle






Re: TDS220 bootup??

boid_twitty
 

TDS220 is monochrome. Orange lines?

RL


Re: TDS 380 Attenuator Resistor Replacement Specs

Siggi
 

Hey Rich,

Matt D'Asaro fixed at least one attenuator in a TDS-420 that was similarly
bad. The article is here:
https://www.antiqueradios.com/forums/viewtopic.php?t=216792. The images
don't load for me, but you can still view them at these links:
http://dasarodesigns.com/~medasaro/TDS420/broken.jpg
http://dasarodesigns.com/~medasaro/TDS420/fixed.jpg

Good luck,
Siggi

On Fri, Apr 30, 2021 at 8:55 AM Richard Peterson <saaber1@comcast.net>
wrote:

Hi Folks. New member, first post . . . I recently picked up a couple of
new to me Tektronix scopes to replace my Hitachi V212. The 2236 is up an
running beautifully after some cleaning, but the TDS380 has a (hopefully)
small issue: No input on CH1. I've traced the problem down to what looks
like a burned 50 ohm thick film resistor on the input of the attenuator
board between the BNC and one of the capacitors on the board. (not quite
sure how to post photos here yet but hopefully this link works:
https://groups.io/g/TekScopes/photo/263498/3215960?p=Created,,,20,2,0,0)

I'm thinking I can simply solder a 50 ohm resistor between the BNC
connector and the SMD capacitor that the original resistor links (the
larger capacitor at the end of the first relay in the photo) . Any
thoughts about doing this and what power rating the resistor should be?

Thanks.

Rich







Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

Roy Thistle
 

On Fri, Apr 30, 2021 at 07:39 AM, Dennis Tillman W7pF wrote:


It sounds like some of you feel entitled to be treated a certain way by eBay
There are many on-line marketplaces... Amazon, PayPay Mall, Ebay, Alibaba(AliExpress, Taobao) Rakuten, and others... but Amazon has about twice the visits of all the rest put together... while Ebay gets about 1/4 of what Amazon does. Amazon dominates.

One reason why Amazon dominates might be because Amazon was quick to become a buyer's market, with good support for buyers. Ebay was quite slow to do that.

Sellers always complain about Ebay, and Ebay buyers: there's enough of it on TekScopes, and copious threads on Reddit. But then some sellers are still doing the same things that caused Ebay to become a buyer's market in the first place.

The OP on this thread was pondering an alternative to Ebay. I reckon, I don't see one... not with a global reach anyway. It's safe to say, greater than 99% of the population considers what we have as being junk. Certainly, the U.S. government... which originally paid for much of what we have does... and institutions certainly do. Most Ebay competitors don't even list it. So if Ebay stopped listing surplus, where would you sell?
--
Roy Thistle


Re: 465 Electrolytic Capacitor Replacement

Harvey White
 

I've used Ungar, Hakko (both wand and gun), and Metcal.

I've found the Metcal system to be better, although you do have to make sure (for any of them) that the tip is clean and capable of good heat transfer.

One thing you can do is to use a larger (still controlled!) iron to heat an area, then use the solder sucking tip to vacuum up the solder.

There's only so much heat you can get out of something designed to *not* damage a delicate PC board, when the object needed an industrial soldering iron to heat the surrounding acre of board and part, let alone chassis.

Harvey

On 4/30/2021 1:30 PM, Dave Peterson via groups.io wrote:
Thanks for this. I'm still in the process of tooling up my workspace. This sort of input helps. There's a lot of sellers and a lot of cheap crap out there. A word of mouth promotion trumps a lot of sales pitch for me. I could easily break the bank trying to buy everything at once, so keeping cost down is a big deal. Looks like recapping power supplies is going to become a common activity on my bench! A robust extraction system is going to be very useful.

I've always loathed the plastic push-button type solder suckers. This looks like a nice setup. Clearly you're happy with it. I'll have to add it to the queue.

Dave


On Friday, April 30, 2021, 10:09:15 AM PDT, Torch <tekscopes@verhey.org> wrote:
I bought a vacuum pump desoldering station a few years ago. Works great -- doesn't overheat traces, gets rid of the solder, leaves an empty hole and a clean carpet:

https://www.circuitspecialists.com/Compact_Desoldering_System.html










Re: New to Tek 465B operation

Torch
 

These are decent probes, good bandwidth, reasonably priced and have the Tek readout pin. 10x only though:

https://www.ebay.com/p/1762967673


Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

-
 

Dennis,

I agree with everything that you said. However I think that what people
truely object to are the *never-ending* price increases from E-bay. PLUS
all of the other charges (PayPal and Global Shipping for example) for
services that they force buyers and sellers to use. Personally, I've been a
buyer and a seller on Ebay since the first year that they started I've seen
their fees rise from a FLAT 2% to whatever the combined totals are today. I
quit sellling on Ebay about 5 years ago after I sold ONE item for $200 and
was charged slightly over $22 for Ebay and PayPal only and shipping not
included. But as you point out Ebay is a private company and isn't beholden
to it's buyer and sellers so they have decide if they want to use it or
not. However, as far as I'm concerned, E-bay is still the only serious
game in town if you want to sell something for a decent price. And it's
also usually the only place where most individuals can buy the specialized
test equipment or other items that we desire.

Overall; despite it's constant cost increase, I'm very pleased to have
seen the rise of Ebay. I've made a pile of money selling TE and other items
that I would never have been able to sell without them and I've also been
able buy books, TE and some other items that I would never been able to
find, or have been able to afford, from the old regular TE suppliers such
as Tucker Electronics.

On Fri, Apr 30, 2021 at 10:40 AM Dennis Tillman W7pF <dennis@ridesoft.com>
wrote:

Hi Daniel et al,
It always surprises me that people are so easily outraged by changes like
this one that eBay has in the works. eBay Inc. is a publically traded
company beholden to its stockholders, not to you or me. Their management
has to constantly balance the needs of their stockholders, sellers, and
buyers while insuring they don't violate the laws and customs of every
country they do business in. I don't envy them. Any change they make is
bound to anger some of their constituents.

We all have the ultimate power to determine if this was a good or bad
decision on their part by what we do next. It is simple: Stop using them if
you don't like this new policy.

I became a member 21 years ago, just 4 years after they started. In my
time as a member I can easily see how it evolved. I welcomed some things
they did, and I was dismayed by other things. I do not expect it to be the
same as it was back then and neither should you. I still find it extremely
useful, although not for what I was using it for back then.

As they evolve so do I. I have had to accommodate their ever changing
rules and requirements so I can continue to take advantage of the amazing
marketplace they have created for exchanging goods. In the 25 years since
they were founded near the East Bay in San Francisco they have
revolutionized buying and selling. I'm certain of one thing: eBay will
continue to evolve and stockholders, buyers, and sellers will continue to
complain about it until they vote with their feet.

It sounds like some of you feel entitled to be treated a certain way by
eBay and you are angry that you have made an incorrect assumption. Welcome
to the club. I was angry when I moved out on my own and my mom didn't come
over to my apartment to vacuum, do my laundry, and continue cooking for me.
Eventually I got over it, I hope you do too. eBay still has plenty to offer
if you know what to look for and how to find bargains.

I appreciate the members who are offering suggestions on how to
accommodate the latest change coming from eBay. The alternative,
complaining about the changes, doesn't help. eBay does care about you (in
the big sense) but they have hundreds of millions of stockholders, sellers,
and buyers to also care about. When you realize how insignificant you are
it might help you to understand that complaining is a waste of time. Your
choice is to evolve with eBay or vote with your feet by leaving.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of
Daniel Koller via groups.io
Sent: Tuesday, April 27, 2021 11:26 AM

<SNIPS>
Hi folks, this is OFF TOPIC because it's about e-bay, but on the other
hand, with the exception of my older gear, it's just about the only way I
get *any* Tek or HP gear these days. So, with apologies if it drags on too
long and in the wrong direction,....
I got a message from e-bay that explains they are changing their payment
structure. According to that, sellers will need to directly link a bank
account to e-bay so that they can receive payments directly from buyers.
By May 21, if you do not link a bank account to e-bay, they will not allow
new postings! So, the implication is that Paypal is no longer going to
work. I don't know about folks here, but I suspect, like me, they are a bit
older, financially conservative, and are loathe to link a personal bank
account to e-bay. To this day I do not have my paypal account "linked"
to my bank account. I can have all my on-line accounts hacked, but none
of them have any access to my bank account.




--
Dennis Tillman W7pF
TekScopes Moderator






Re: 465 Electrolytic Capacitor Replacement

Dave Peterson
 

Thanks for this. I'm still in the process of tooling up my workspace. This sort of input helps. There's a lot of sellers and a lot of cheap crap out there. A word of mouth promotion trumps a lot of sales pitch for me. I could easily break the bank trying to buy everything at once, so keeping cost down is a big deal. Looks like recapping power supplies is going to become a common activity on my bench! A robust extraction system is going to be very useful.

I've always loathed the plastic push-button type solder suckers. This looks like a nice setup. Clearly you're happy with it. I'll have to add it to the queue.

Dave

On Friday, April 30, 2021, 10:09:15 AM PDT, Torch <tekscopes@verhey.org> wrote:

I bought a vacuum pump desoldering station a few years ago. Works great -- doesn't overheat traces, gets rid of the solder, leaves an empty hole and a clean carpet:

https://www.circuitspecialists.com/Compact_Desoldering_System.html


Re: 465 Electrolytic Capacitor Replacement

Torch
 

I bought a vacuum pump desoldering station a few years ago. Works great -- doesn't overheat traces, gets rid of the solder, leaves an empty hole and a clean carpet:

https://www.circuitspecialists.com/Compact_Desoldering_System.html


Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

 

Hi Dennis,

I think there is quite some room for action inbetween "accepting" and "vote with your feet". Protests can have large effects and may be the only option when you actually do not have the choice to "vote with your feet".

Ebay does have a quasi monopole on online-auctions! Thats what put their actions in a different light as if they were in real competition with other companies. I wonder if their efforts to motivate vendors to use fixed prices does have to do with fears about anti-trust activities? It allows them to point to Amazon as competitor...

cheers
Martin


TDS220 bootup??

Pwrelectronics
 

Got a TDS220. Does not get used much. It sat unused for at least a year. Cord plugged in, switched off (these have a hardware on/off sw on the AC line).

So, went to use it, turned on and I get orange lines on the screen. ????

Tried turning it on an off a few times and then it booted up and seemed to work OK.

The next time I tried it, same story with the orange lines. I eventually discovered a light slap on the scope would pop it out of the orange lines thing and it would boot and pass the self test and work normally.

If left on a while and turned off and then immediately back on right away, odds are it boots fine again. But let it set even a minute or so and then back to needing a shock.

I've had this scope for well over a decade and this only started in the past year or so.

What should I look at? After the obvious with bad connections someplace, could the xtal be "lazy" now for some reason and the oscillator on the main micro not starting?

thanks,


Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

Marian Beermann
 

Hi,

that's interesting - I long suspected that the various "editions" of eBay
are quite different under the hood. I wouldn't be surprised if their main
site (ebay.com) is much more well maintained and monitored compared to
their regional sites (ebay.de, ebay.fr etc.).

Here (Germany/Europe) paying with wire transfer is quite common and until
this change, you could choose to offer payment with e.g. Paypal and wire
transfer. For wire transfers, eBay would just give buyers the IBAN set in
the account settings to the buyer. So the buyer would literally just wire
the money directly to you. I understand this is unusual in the US, but wire
transfers are fast and free here, so it's not uncommon. Someone having the
account number, or IBAN, can't really do anything besides wiring you more
money, so it's not a security problem.

When paying with PayPal, the buyer would get your PayPal email as well (and
vice versa), so at that point nobody can really keep the two of you from
just sending each other emails with whatever.

Cheers, Marian

Am Mi., 28. Apr. 2021 um 01:03 Uhr schrieb - <rrrr6789@gmail.com>:

Marian,

I don't know what part of the world that you're in but I RARELY see any
problems on E-bay here in the US. I use both Mozilla and Palemoon.

I don't think that E-bay (US) has given out the buyer's information to
the sellers, or vice versa, in MANY years. They did very early on but I
think that stopped when they started using PayPal since they didn't want
the buyers and sellers to be able to contact each other and make deals
outside of Ebay/PP. I know that years ago I tried to send a buyer or a
seller, I don't recall which, my phone number through E-bay's message
system and E-bay would consistantly reject my message. I finally got around
it by putting the phone number into a JPG image and was able to send that
but I think that E-bay later figured that one out and even found a way to
block that. Many years ago when I was selling a lot of E-bay and I usually
shipped via FedEx and FedEx always wanted the receiver's phone number in
case there was a delivery problem. At the time, I could contact the buyer
through E-bay's message system and have send me their phone number the same
way. But as I said, that was a LONG time ago! Ebay is vastly different
now than when I first started using it and people would send each other
personal checks and even cash through the mail to pay for their purchases.
Someone in Germany once folded up some American dollar bills and put them
inside of a 3 1/2" floppy disk shell and mailed it to me. He didn't warn me
and I didn't know what it was for and almost threw it away when I received
it! Heck, my original buyer/seller name on E-bay WAS my complete E-mail
address! Times change!

On Tue, Apr 27, 2021 at 3:52 PM Marian B <public@enkore.de> wrote:

As I understand it, eBay will no longer provide your account information
to
the buyer at all. Instead the buyer pays eBay, which acts as an escrow,
and
will eventually pay you (or not). The number of payment options would
therefore be independent of the seller's choices.

Personally what irks me more about eBay is that the site is constantly
broken, has years old bugs like items not being added to the watchlist at
times, bids not registering, login loops, aggressive 2FA verification
over
and over again, doesn't properly work with Firefox, and has a rather
obscene 11 % tax on top. 10 % would be acceptable, if their site was
top-notch - but it's not, it's half-working garbage at the best of times.

Cheers, Marian

Am Di., 27. Apr. 2021 um 20:32 Uhr schrieb Daniel Koller via groups.io
<kaboomdk=yahoo.com@groups.io>:

Hi folks, this is OFF TOPIC because it's about e-bay, but on the other
hand, with the exception of my older gear, it's just about the only
way I
get *any* Tek or HP gear these days. So, with apologies if it drags on
too
long and in the wrong direction,....
I got a message from e-bay that explains they are changing their
payment
structure. According to that, sellers will need to directly link a
bank
account to e-bay so that they can receive payments directly from
buyers.
By May 21, if you do not link a bank account to e-bay, they will not
allow
new postings! So, the implication is that Paypal is no longer going
to
work.
I don't know about folks here, but I suspect, like me, they are a bit
older, financially conservative, and are loathe to link a personal bank
account to e-bay. To this day I do not have my paypal account
"linked"
to my bank account. I can have all my on-line accounts hacked, but
none
of them have any access to my bank account.
One thing I thought to do is open a small credit union account with
low/no fees and use that only for e-bay / paypal and keep the balance
low,
just in case something gets hacked. But now I have to go to the
bank,
or
perhaps open an account on-line. E-bay is NOT making it easier for
the
small seller. More and more e-bay is just becoming a venue for cheap
Chinese goods and wholesale garbage.
So, just wondering what folks here plan to do about selling their old
gear, and working with ebay in the future. Anyone have any good Ideas
or
workarounds to the e-bay problem, or an alternate e-venue for buying
and
selling old gear? E-bay has been a collector's and hobbyist's goldmine
for
20 years. It's sad to see it continually changing for the worse.
I am sensitive to the fact that this is a topic only tangentially
related to Tek or HP gear, so please keep replies relevant to how e-bay
is
a conduit for acquiring such gear for us. I'm happy to take replies
off-group as well, but if it's relevant, I presume we all want to hear
about it.
Thanks,
Dan














Re: Tektronix Probe Replacement Parts and Accessories

Dallas Smith
 

Thank you Dennis, will be very helpful ;-}


Re: Tektronix Probe Replacement Parts and Accessories

EricJ
 

Dennis, That is very handy, thank you for taking the time and for sharing!--EricSent from my Galaxy

-------- Original message --------From: Dennis Tillman W7pF <dennis@ridesoft.com> Date: 4/30/21 10:06 AM (GMT-06:00) To: TekScopes@groups.io Subject: [TekScopes] Tektronix Probe Replacement Parts and Accessories I assembled together a PDF for the Probe Replacement Parts and Accessoriesfor most of the Tek Probes.It has pictures and part numbers for all the parts and accessories of the 5mm (Miniature), 3.5 mm (Compact), and 2.5 mm (Subminiature) probes. In addition, it lists the replacement part numbers of the parts in the otheractive and passive probes.I didn't search through every catalog from the 1950s to the present day soit does not include every probe, but it should cover 85% to 90% of the Tekprobes in common use today.It is located in the Files section of the TekScopes archive at:https://groups.io/g/TekScopes/files/Tektronix%20Probe%20Replacement%20Parts%20and%20Accessories.pdfDennis Tillman W7pF


File /Tektronix Probe Replacement Parts and Accessories.pdf uploaded #file-notice

TekScopes@groups.io Notification <noreply@...>
 

The following files have been uploaded to the Files area of the TekScopes@groups.io group.

By: Dennis Tillman W7pF <dennis@...>

Description:
Pictures and part numbers for all the parts and accessories of the 5 mm (Miniature), 3.5 mm (Compact), and 2.5 mm (Subminiature) probes. In addition, it lists the replacement part numbers of the parts in the other active and passive probes.


Tektronix Probe Replacement Parts and Accessories

 

I assembled together a PDF for the Probe Replacement Parts and Accessories
for most of the Tek Probes.
It has pictures and part numbers for all the parts and accessories of the 5
mm (Miniature), 3.5 mm (Compact), and 2.5 mm (Subminiature) probes.
In addition, it lists the replacement part numbers of the parts in the other
active and passive probes.

I didn't search through every catalog from the 1950s to the present day so
it does not include every probe, but it should cover 85% to 90% of the Tek
probes in common use today.

It is located in the Files section of the TekScopes archive at:
https://groups.io/g/TekScopes/files/Tektronix%20Probe%20Replacement%20Parts%
20and%20Accessories.pdf

Dennis Tillman W7pF


Re: OT! OT! --- E-bay fee change -- OT! OT! Cross posted with HP group.

 

Hi Daniel et al,
It always surprises me that people are so easily outraged by changes like this one that eBay has in the works. eBay Inc. is a publically traded company beholden to its stockholders, not to you or me. Their management has to constantly balance the needs of their stockholders, sellers, and buyers while insuring they don't violate the laws and customs of every country they do business in. I don't envy them. Any change they make is bound to anger some of their constituents.

We all have the ultimate power to determine if this was a good or bad decision on their part by what we do next. It is simple: Stop using them if you don't like this new policy.

I became a member 21 years ago, just 4 years after they started. In my time as a member I can easily see how it evolved. I welcomed some things they did, and I was dismayed by other things. I do not expect it to be the same as it was back then and neither should you. I still find it extremely useful, although not for what I was using it for back then.

As they evolve so do I. I have had to accommodate their ever changing rules and requirements so I can continue to take advantage of the amazing marketplace they have created for exchanging goods. In the 25 years since they were founded near the East Bay in San Francisco they have revolutionized buying and selling. I'm certain of one thing: eBay will continue to evolve and stockholders, buyers, and sellers will continue to complain about it until they vote with their feet.

It sounds like some of you feel entitled to be treated a certain way by eBay and you are angry that you have made an incorrect assumption. Welcome to the club. I was angry when I moved out on my own and my mom didn't come over to my apartment to vacuum, do my laundry, and continue cooking for me. Eventually I got over it, I hope you do too. eBay still has plenty to offer if you know what to look for and how to find bargains.

I appreciate the members who are offering suggestions on how to accommodate the latest change coming from eBay. The alternative, complaining about the changes, doesn't help. eBay does care about you (in the big sense) but they have hundreds of millions of stockholders, sellers, and buyers to also care about. When you realize how insignificant you are it might help you to understand that complaining is a waste of time. Your choice is to evolve with eBay or vote with your feet by leaving.

Dennis Tillman W7pF

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Daniel Koller via groups.io
Sent: Tuesday, April 27, 2021 11:26 AM

<SNIPS>
Hi folks, this is OFF TOPIC because it's about e-bay, but on the other hand, with the exception of my older gear, it's just about the only way I get *any* Tek or HP gear these days. So, with apologies if it drags on too long and in the wrong direction,....
I got a message from e-bay that explains they are changing their payment structure. According to that, sellers will need to directly link a bank account to e-bay so that they can receive payments directly from buyers. By May 21, if you do not link a bank account to e-bay, they will not allow new postings! So, the implication is that Paypal is no longer going to work. I don't know about folks here, but I suspect, like me, they are a bit older, financially conservative, and are loathe to link a personal bank account to e-bay. To this day I do not have my paypal account "linked" to my bank account. I can have all my on-line accounts hacked, but none of them have any access to my bank account.




--
Dennis Tillman W7pF
TekScopes Moderator


Re: 7A16A with an unknown modification MOD515D

Mark
 

No, nothing labeled like that. I'm sure it's just a mistake in the parts list.

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