It is easy to use PayPal Friends and Family transfer to send funds if you have
already linked a bank checking account to your PayPal account, or if you have a cash
balance at PayPal sufficient for the funds transfer. I could be wrong but I don't
believe there is any way to do a Friends and Family funds transfer if you try to fund
with a credit card.

Remember that PayPal must pay a fee to charge your credit card, just like a
restaurant; someone has to pay that fee and free transfer using Friends and Family
would mean PayPal will be stuck paying the credit card fee. It is unrealistic to
expect PayPal to do that.

Chuck does not explain this below because he refuses to link a bank checking account
to his PayPal account. That is surely his option (he insists he has a reason) but it
limits what he can do at PayPal.

I paid Dennis using PayPal Friends and Family funds transfer and it was funded by ACH
debit of my already-linked bank checking account. I was not asked or required to
remove any PayPal protection when I did the transaction.

Some few folks may have some unique problem, possibly related to using a credit union
account instead of a bank account, but this problem is being blown way out of
proportion.

Larry


On 12/2/2020 10:17 AM, Chuck Harris wrote:

I have written you personally, but I may as well tell the group
why there is a problem publicly.

Paypal accounts that are using a credit card to make payments
cannot do friends and family, without incurring a cash advance
charge from their CC company, and starting the interest rolling
on the balance on their card.... even if they pay the full bill
every month.

So, to sent cash using paypal, we have to use the purchase goods
and services method.  That allows for an ordinary charge on our
credit cards.

To make this work, though, he has to lie to paypal and say that
he has shipped the book.  Then we can lie to paypal and say that
we have received the book.

IT MUST BE DONE IN THIS ORDER!

If Dennis doesn't tell paypal he has shipped the book, he will
have to wait 30 days before paypal will release the funds.

If Dennis does tell paypal he has shipped the book, then we
can click on the Received button, and his funds will be released
immediately.  (Well, unless he has other problems with paypal,
like a history of not sending stuff, or a lot of returns...)

-Chuck Harris

...

If there is an underlying issue with Dennis's pay pal reputation as this seems to be an ongoing issue and it is just a few button clicks to make badly written software happy If there is enough transactions to build the reputation this would no longer be in issue in the future. I would be more then happy to buy a string of $0.50 or $1.00 random Tek vaper ware from Dennis and just say I received the parts I am guessing about 50 ish transactions should make the pay pal software happy that Dennis is not a scammer and we would be able to proceed as normal.

Thoughts on this?

Eric
-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Chuck
Harris
Sent: Wednesday, December 2, 2020 1:18 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Peter Keller book payments PayPal won't
release

I have written you personally, but I may as well tell the group why there is a problem publicly.

Paypal accounts that are using a credit card to make payments cannot do friends and family, without incurring a cash advance charge from their CC company, and starting the interest rolling on the balance on their card.... even if they pay the full bill every month.

So, to sent cash using paypal, we have to use the purchase goods and services method. That allows for an ordinary charge on our credit cards.

To make this work, though, he has to lie to paypal and say that he has shipped the book. Then we can lie to paypal and say that we have received the book.

IT MUST BE DONE IN THIS ORDER!

If Dennis doesn't tell paypal he has shipped the book, he will have to wait 30 days before paypal will release the funds.

If Dennis does tell paypal he has shipped the book, then we can click
on the Received button, and his funds will be released immediately.
(Well, unless he has other problems with paypal, like a history of not
sending stuff, or a lot of returns...)

-Chuck Harris

Dennis Tillman W7pF wrote:

The following people have sent payment for Peter Keller's book but
PayPal is holding the funds and will not release them to me so I can
pay Peter Keller for your book(s).
BL, $35.63, ON HOLD Nov 22
SJ, $68.53, ON HOLD Nov 22
BG, $38.54, ON HOLD Nov 23
CH, $73.93, ON HOLD Nov 23
DG, $68.53, ON HOLD Nov 23
DG, $6.20, ON HOLD Nov 24
LS, $35.63, ON HOLD Nov 26

PayPal describes these transactions as "Pending". It explains that
"This payment is in your on hold balance. Update your shipping info
or order status to get your money sooner."

If each of you will give me permission to tell PayPal one of the following:
1) I shipped, or I am planning to ship, Peter Keller's book to you;
2) Your payment was for a service or virtual product which doesn't
need to ship.

Then I think PayPal will release your payment.

Dennis Tillman W7pF

If there is an underlying issue with Dennis's pay pal reputation as this seems to be an ongoing issue and it is just a few button clicks to make badly written software happy If there is enough transactions to build the reputation this would no longer be in issue in the future. I would be more then happy to buy a string of $0.50 or $1.00 random Tek vaper ware from Dennis and just say I received the parts I am guessing about 50 ish transactions should make the pay pal software happy that Dennis is not a scammer and we would be able to proceed as normal.

Thoughts on this?

Eric
-----Original Message-----
From: TekScopes@groups.io <TekScopes@groups.io> On Behalf Of Chuck Harris
Sent: Wednesday, December 2, 2020 1:18 PM
To: TekScopes@groups.io
Subject: Re: [TekScopes] Peter Keller book payments PayPal won't release

I have written you personally, but I may as well tell the group why there is a problem publicly.

Paypal accounts that are using a credit card to make payments cannot do friends and family, without incurring a cash advance charge from their CC company, and starting the interest rolling on the balance on their card.... even if they pay the full bill every month.

So, to sent cash using paypal, we have to use the purchase goods and services method. That allows for an ordinary charge on our credit cards.

To make this work, though, he has to lie to paypal and say that he has shipped the book. Then we can lie to paypal and say that we have received the book.

IT MUST BE DONE IN THIS ORDER!

If Dennis doesn't tell paypal he has shipped the book, he will have to wait 30 days before paypal will release the funds.

If Dennis does tell paypal he has shipped the book, then we can click on the Received button, and his funds will be released immediately. (Well, unless he has other problems with paypal, like a history of not sending stuff, or a lot of returns...)

-Chuck Harris

Dennis Tillman W7pF wrote:

The following people have sent payment for Peter Keller's book but
PayPal is holding the funds and will not release them to me so I can
pay Peter Keller for your book(s).
BL, $35.63, ON HOLD Nov 22
SJ, $68.53, ON HOLD Nov 22
BG, $38.54, ON HOLD Nov 23
CH, $73.93, ON HOLD Nov 23
DG, $68.53, ON HOLD Nov 23
DG, $6.20, ON HOLD Nov 24
LS, $35.63, ON HOLD Nov 26

PayPal describes these transactions as "Pending". It explains that
"This payment is in your on hold balance. Update your shipping info or
order status to get your money sooner."

If each of you will give me permission to tell PayPal one of the following:
1) I shipped, or I am planning to ship, Peter Keller's book to you;
2) Your payment was for a service or virtual product which doesn't
need to ship.

Then I think PayPal will release your payment.

Dennis Tillman W7pF

The following people have sent payment for Peter Keller's book but
PayPal is holding the funds and will not release them to me so I can
pay Peter Keller for your book(s).
BL, $35.63, ON HOLD Nov 22
SJ, $68.53, ON HOLD Nov 22
BG, $38.54, ON HOLD Nov 23
CH, $73.93, ON HOLD Nov 23
DG, $68.53, ON HOLD Nov 23
DG, $6.20, ON HOLD Nov 24
LS, $35.63, ON HOLD Nov 26

PayPal describes these transactions as "Pending". It explains that
"This payment is in your on hold balance. Update your shipping info or
order status to get your money sooner."

If each of you will give me permission to tell PayPal one of the following:
1) I shipped, or I am planning to ship, Peter Keller's book to you;
2) Your payment was for a service or virtual product which doesn't
need to ship.

Then I think PayPal will release your payment.

Dennis Tillman W7pF

On Wed, Dec 2, 2020 at 01:19 PM, Jeff Dutky wrote:

If I were going to "bake" some of these to see how that affects them, how
would I go about doing this?

Hi Jeff,

An old Allen-Bradley fixed resistors catalog specifies the correct
conditioning parameters. Here is a quote of the relevant section:

Effect of moisture absorption - Moisture attraction is a
generic characteristic of carbon, and when the Hot-Molded
Carbon Composition resistor absorbs moisture, e.g., during
shipment and storage, its resistance value will always
increase. Under high humidity conditions it is not unusual
for parts to increase 6% in resistance value in as little as
72 hours. The characteristic is reversible, and dehumidifying
the parts is easily accomplished either by storing them in a
controlled, low-humidity area or by conditioning them in a
convection over at 100 C. The chart below lists the proper
conditioning parameters.

Rating Conditioning Time @ 100 C
1/8W 25 Hours
1/4W 50 Hours
1/2W 75 Hours
1W 120 Hours
2W 130 Hours

I use a temperature-controlled oven, with a temperature sensor placed near
the resistors on the rack. I set the oven controller to maintain 95 C. The
actual temperature tends to vary +/- 3 C, which keeps it within 100 C.

Also, an important aspect that has not been discussed in this thread so far
is the effect of moisture ingress on soldering. Namely, it is my understanding
that if there is any moisture trapped inside the CC resistor at the time of
soldering, the high soldering temperature will cause this moisture to
vaporize so rapidly that it can create micro-fissures in the resistor material,
and especially near the carbon comp/lead terminal interface. Any such
damage is permanent, and will then often get worse over time.

The smaller the resistor, the more vulnerable it is to this type of damage.
The small 1/8W carbon comp resistors that Tektronix used in
high bandwidth equipment in the 60s and 70s (S- series sampling heads,
7S- and 7T- plugins, DC508, etc.) are _extremely_ fragile in this regard.

I place the baked resistors in a hermetically sealed container
immediately after baking is finished, and make sure to complete all
soldering within an hour or two after that. I never attempt to solder
CC resistors that may have absorbed moisture, and always use
heat sinks during soldering.


dan

Okay, to bring this a little bit back to the original topic:

I received the first batch of replacement NOS carbon comp resistors today.

I checked them with a multimeter and they all read a bit high: between 7.7 kΩ and 7.9 kΩ, which is between 2.5% and 5% off. But these also appear to be marked at 10% tolerance (it's hard to tell if the metallic band is silver or gold), so that's still well within spec, and much better than the two that are in-circuit on the 475A. It's also hard to tell from the pictures I took of the circuit board ( https://groups.io/g/TekScopes/photo/257066/0?p=Created,,,20,2,0,0 ), but the upright resistors may not have any tolerance band, meaning that they are 20% tolerance, which would put them just within tolerance with their present measured values of ~9 kΩ. The service manual, however, indicates that they are supposed to be 5% tolerance parts.

I'm considering taking the lowest measured values and using them to replace the existing (drifted) parts, but it's going to be tough getting the iron in to de-solder them from the board.

If I were going to "bake" some of these to see how that affects them, how would I go about doing this?

-- Jeff Dutky

The Tek lever knob tips are P/N 366-0215-xx. They're widely used, e.g. Type 453 and 547 scopes and 1A1, 1A2, 1A4, and 1A5 plugins.

For what it's worth, I replace broken ones with the cylindrical tact-switch cap made by E-Switch, part number 1RDGR, $0.18 each at Mouser.
Description is "Switch Bezels / Switch Caps RND DARK GRAY CAP". It doesn't have the feel of the original but it works and it stays in place.

Dave Wise
________________________________________
From: TekScopes@groups.io <TekScopes@groups.io> on behalf of thespin via groups.io <thespin=gmail.com@groups.io>
Sent: Wednesday, December 02, 2020 9:27 AM
To: TekScopes@groups.io
Subject: [TekScopes] Gauging interest in a run of reproduction knob tips

Hey all,

I've noticed that a lot of the lever knob tips have cracked due to the combination of being made of bakelite and the internal stresses of the leaf spring. I'd like to do a short run of replacement knobs. I've tried several different 3D printing processes and haven't been totally happy with any of them. In particular, FDM tends to have pronounced layer lines, and small enough nozzles require extremely high melt flow rates restricting the choice of materials and thus colors. I also have an SLA printer, but these resins result in parts that last a few months before cracking due to UV exposure. Thus, urethane casting and injection molding are seemingly the best options. MJF or SLS may be ok but I'm not a huge fan of the texture.

If you'd be interested, I'd appreciate a response to the following survey.

https://forms.gle/U4LUT8LiVHhDk911A

Best wishes,
Evan