Date   

Re: Tek VAR Pot Repair Rings

Jim Adney
 

On Wed, Oct 20, 2021 at 01:55 PM, snapdiode wrote:

What's the timeframe for getting back to you with a commitment?
I don't have any timeframe in mind, but the machine shop predicted a lead time of 5-6 weeks. They must be busy. I don't plan to place an order for these until I've got enough commitments to get me close to 150 pieces. I won't ask for prepayment, but I won't object if someone offers to make one. Take your time, but I hope this doesn't get dragged out too long.


Re: Replacement caps for DC 505A

Dave Peterson
 

Blame it on me: I wasn't doing a proper job of searching Mouser. Not even sure what I did to get only two results. Using Mark Vincent's search as a start point I found the variety of Vishay axial capacitors. Looks like the 125 ALS line 6800uF cap is a good fit.

Still good to get thoughts and ideas from others. I'm still a newbie at capacitor selection, so don't completely trust myself.

On Wednesday, October 20, 2021, 05:29:02 PM PDT, Jeff Dutky <jeff.dutky@gmail.com> wrote:

Dave,

How close are the mechanical tolerances? The highest values for each voltage range (e.g. 6800 uF @ 16 V) is only 21mm in diameter. Would that still fit in the space?

Otherwise, my (relatively ignorant) understanding is that 4700 uF is today's equivalent to 5000 uF from the 1970s. Also, you are not designing this to be manufactured in bulk. If you order several more caps than you need you can select for highest capacitance, and not have to worry that the parts might be 20% below spec. You might get lucky and get a couple of parts that are 10% above spec.

-- Jeff Dutky


Re: Tek VAR Pot Repair Rings

 

Jim,

After I committed to only 10 rings, I did a more thorough survey of my letter and 1-series collection, and I would like to increase my order to 20 rings.

Almost every plug-in in my collection has these pots, but I had not noticed because many of them are not showing any symptoms of failure, and I had (obviously) not investigated pots whose knobs were not slipping.

-- Jeff Dutky


Re: Tek VAR Pot Repair Rings

Dave Casey
 

For anyone needing more than just a repair ring, I have a handful of NOS
Tek Made pots in this style. Send your part number requests and I'll see
what I have.

Dave Casey

On Wed, Oct 20, 2021 at 1:55 PM snapdiode via groups.io <snapdiode=
yahoo.com@groups.io> wrote:

That is *very* interesting and timely for my collection. What's the
timeframe for getting back to you with a commitment? I need to examine 20
plugins ...
And do you need a deposit or 100% upfront?






Re: Replacement caps for DC 505A

 

Dave,

How close are the mechanical tolerances? The highest values for each voltage range (e.g. 6800 uF @ 16 V) is only 21mm in diameter. Would that still fit in the space?

Otherwise, my (relatively ignorant) understanding is that 4700 uF is today's equivalent to 5000 uF from the 1970s. Also, you are not designing this to be manufactured in bulk. If you order several more caps than you need you can select for highest capacitance, and not have to worry that the parts might be 20% below spec. You might get lucky and get a couple of parts that are 10% above spec.

-- Jeff Dutky


Re: USPS shipments comments

Roy Thistle
 

On Mon, Oct 18, 2021 at 11:57 PM, Jean-Paul wrote:


The postman was 100% on extra adresse or labels causing misdirection we have
had that.
I can see, sort of, if there's an old label with a bar code, or a bar code printed on the box. I remove those, or black them out, with a marker. I'm not so sure why it should matter... particularly with printing or writing on the box... since the "post office" uses a particular bar code, which ought to be fairly unique. The sorting machines are supposed to scan for the U.S.P.S. label on the box. If the "postman" sends your plugins back to Kimberly-Clark because you posted them in a Huggies box, with a U.S.P.S. label on it... well... it's just another day at the post office: right?

--
Roy Thistle


Re: USPS shipments comments

Roy Thistle
 

On Mon, Oct 18, 2021 at 11:57 PM, Jean-Paul wrote:


Only use Fed Ex
Here in the colonies, we sometimes use Dead Ex... did I spell that wrong? (Highly talented in the arts of package contents destruction, they can fatally break stuff in any package just by accepting it for shipment.)
The only individuals I know that are faster than Ursain Bolt, at least on the 50 meter dash, are courier drivers that drop-deliver packages to residential. (And yes! They really do drop the package, when they deliver it.)

--
Roy Thistle


Re: USPS shipments comments

maurit
 

I am Italian an electronic hobbyist.
In 20 years, with eBay sales, I have shipped more than 2500 packages around the world.
From what I have read on this topic I have understood that "the whole world is a country".
I sympathize with you but unfortunately we are helpless victims.
I use Poste Italiane to send, to receive from the USA I ask for USPS.
I rarely use private couriers, only with eBay with their "shipping manager" and if it's convenient.
In any case: Bomb-proof packaging !!!


Re: Replacement caps for DC 505A

Mark Vincent
 

Dave,

Take one lead and bend it so it goes in one hole. The other lead bend it so it is over or under, under if the bare wire does not touch other traces. Then use a solid wire as the extension to the other hole. the solid wire keeps the body stiffer and reduces movement. Wire spaghetti can be put on the wire for insulation. An adhesive between the can and board can be used to further secure it. I have done this axial to radial conversion before.

Mark


Re: Replacement caps for DC 505A

Dave Peterson
 

That looks pretty good!

I've been studying Vishay's website, and the 500D series was looking promising, but couldn't find the right size available for sale. It's been kind of maddening how this particular size seems to skirt the boundaries of availability. I keep getting close, but then the series/size combos that would work turn out to be the ones that aren't available.


I guess I was excluding things below 5000uF. Do you think it's ok being 300uF below nominal? The book calls for +75%, -10%, so as low as 4500uF. Obviously it would depend on what actually got delivered. A 4700uF 20% low would be only 3760uF. I suspect they come a bit closer to nominal than the extreme ends of spec.

Looking at the datasheet for the Vishay 120 ATC looks like the lead length is enough to span the trace distances. It's something to contemplate.

The frustrations with the axial availability is leading me to reconsider the Nichicon UHE. I think it's a better capacitor, and the need to run a jumper is really a small aesthetic thing only. Wouldn't I prefer a better cap over aesthetics? I guess I'd need to consider physical mounting as well - a radial would require something to hold it in place. The axial would be lead mounted. But long leads (the 120 ATC means lead lengths of about 20mm + 1 radius ~= 30mm) seems a bit flimsy as well.


Thanks for the research and inputs Mark.


Re: Replacement caps for DC 505A

Mark Vincent
 


Re: USPS shipments comments

Merchison Burke
 

No only did your friend, with the camera, get punched in the face but he got punched in the stomach and kicked in the groin as well. Not that I approve, but I can see why some people turn to the gun to settle their grievances.

On 2021-10-20 10:39 a.m., stevenhorii wrote:
I once picked up a Project Mercury horizon scanner from a surplus dealer in
Los Angeles. I was headed home and already had a lot of stuff that I was
taking back as baggage, so I decided to ship it. I put my address on the
instrument, packed it using the star-shaped cutout foam that the US
Military uses for shipping aircraft instruments, and put an address label
on that box. Then the box went into a larger box that allowed for
two-inches (about 5 cm) of foam around all sides. It was a new box, no old
labels or printing on it. Address label on it, covered the label with clear
tape, and took it to the local UPS. I had used them before and they had a
sign that said “Pack for a four-foot drop onto concrete”. My package would
meet that spec.

When they weighed it, they told me “There will be a surcharge for this
package. It is too large for the weight”. I pointed to their sign and said
that I packed it to meet that suggestion. They would not relent so it was
an extra $10 (this was back in the ‘90s). I can understand why they do this
- packages like this take up more space in their trucks or air freight
containers so it winds up being less economical for them. Still to get
charged extra to meet their suggested packing was irritating.

If you don’t know already, FedEx Ground in the US is different from FedEx
Express. The Ground service uses independent contractors, though the US
Labor folks decided that they are employees so FedEx had to adjust their
policies for that. Still, it means for far more variability among the
drivers. I have had packages that arrived very clean and with little
evidence that they had been shipped at all. Others arrived like they had
been dropped onto concrete - from far more than four feet - and then
drop-kicked into and out of the truck. The reason for putting address
labels on everything is that a friend of mine shipped a fairly large camera
and the person who bought it got an empty box with one side torn open. UPS
denied the claim since it was “inadequately packed”. Then they said there
was no way they could get it to the destination even if they could find it
because there was no label on the camera. It would eventually wind up for
sale in an “unclaimed freight” auction. My friend had to refund the cost to
the buyer so he lost out twice - what he paid for the camera and then
refunding the purchase price to the buyer. Well, and the shipping cost as
well. Oh, and he had the camera packed by a company that packs and ships
stuff, he did not do it himself. He also lost out on the packing cost. The
packer/shipper said he always packs to UPS standards so he would not refund
the packing cost.

Back to the USPS thread. I have a jeweler in Chicago that does custom work.
I have her design something when I need a gift for my wife. We talked about
shipping. She almost exclusively uses USPS. Why? It is a theft deterrent.
If a package is stolen from UPS or FedEx, depending on the value, it’s a
crime but subject to civil law. If a package is stolen from the USPS, it is
a Federal crime (well, depending to some extent on the value - but we’re
talking jewelry here) so a thief might think twice before stealing a USPS
package. She said that most of her jeweler friends do the same thing. They
will all use FedEx Express if requested and they insure the packages and
require a signature on delivery. But this is also for jewelry - generally
small and light, not a 50-pound Tek scope.

On Wed, Oct 20, 2021 at 02:32 John Parkins G8KVP <john@g8kvp.com> wrote:

Hello All,

Just a word of warning......... from the UK.

I run the parts department of an agricultural dealer, as you can imagine
some of the parts that are delivered to us are large, heavy and you would
think unbreakable. Don't you believe it, in the past year we have had more
damaged, broken, delayed parts than ever before and not to mention the
parts that just don't turn up at all. On top of that because of our
wonderful, self inflicted, Brexit we have had no end of problems with
customs. At the moment we are trying to send an engine (£25,000 worth) back
to Germany, so far it's made 5 trips and been returned each time. We're not
told why it comes back...........

Costs have gone through the roof, a regular customer had a near monthly
order. It used to cost £30 to get it there, it now costs £180! 6 times as
much.

So the moral is, pack extremely well, then do it better. Photograph
everything so you have a record of not only what you've sent but how you've
packed it. Do the paperwork and then get someone else to check the
paperwork. Give it to the courier and wave goodbye.........

Some couriers are better than others, but they have all let us down at
some point.


--
Best regards,
John mailto:john@g8kvp.com







--
This email has been checked for viruses by AVG.
https://www.avg.com


Re: Tek VAR Pot Repair Rings

snapdiode <snapdiode@...>
 

That is very interesting and timely for my collection. What's the timeframe for getting back to you with a commitment? I need to examine 20 plugins ... And do you need a deposit or 100% upfront?


Re: USPS shipments comments

stevenhorii
 

I once picked up a Project Mercury horizon scanner from a surplus dealer in
Los Angeles. I was headed home and already had a lot of stuff that I was
taking back as baggage, so I decided to ship it. I put my address on the
instrument, packed it using the star-shaped cutout foam that the US
Military uses for shipping aircraft instruments, and put an address label
on that box. Then the box went into a larger box that allowed for
two-inches (about 5 cm) of foam around all sides. It was a new box, no old
labels or printing on it. Address label on it, covered the label with clear
tape, and took it to the local UPS. I had used them before and they had a
sign that said “Pack for a four-foot drop onto concrete”. My package would
meet that spec.

When they weighed it, they told me “There will be a surcharge for this
package. It is too large for the weight”. I pointed to their sign and said
that I packed it to meet that suggestion. They would not relent so it was
an extra $10 (this was back in the ‘90s). I can understand why they do this
- packages like this take up more space in their trucks or air freight
containers so it winds up being less economical for them. Still to get
charged extra to meet their suggested packing was irritating.

If you don’t know already, FedEx Ground in the US is different from FedEx
Express. The Ground service uses independent contractors, though the US
Labor folks decided that they are employees so FedEx had to adjust their
policies for that. Still, it means for far more variability among the
drivers. I have had packages that arrived very clean and with little
evidence that they had been shipped at all. Others arrived like they had
been dropped onto concrete - from far more than four feet - and then
drop-kicked into and out of the truck. The reason for putting address
labels on everything is that a friend of mine shipped a fairly large camera
and the person who bought it got an empty box with one side torn open. UPS
denied the claim since it was “inadequately packed”. Then they said there
was no way they could get it to the destination even if they could find it
because there was no label on the camera. It would eventually wind up for
sale in an “unclaimed freight” auction. My friend had to refund the cost to
the buyer so he lost out twice - what he paid for the camera and then
refunding the purchase price to the buyer. Well, and the shipping cost as
well. Oh, and he had the camera packed by a company that packs and ships
stuff, he did not do it himself. He also lost out on the packing cost. The
packer/shipper said he always packs to UPS standards so he would not refund
the packing cost.

Back to the USPS thread. I have a jeweler in Chicago that does custom work.
I have her design something when I need a gift for my wife. We talked about
shipping. She almost exclusively uses USPS. Why? It is a theft deterrent.
If a package is stolen from UPS or FedEx, depending on the value, it’s a
crime but subject to civil law. If a package is stolen from the USPS, it is
a Federal crime (well, depending to some extent on the value - but we’re
talking jewelry here) so a thief might think twice before stealing a USPS
package. She said that most of her jeweler friends do the same thing. They
will all use FedEx Express if requested and they insure the packages and
require a signature on delivery. But this is also for jewelry - generally
small and light, not a 50-pound Tek scope.

On Wed, Oct 20, 2021 at 02:32 John Parkins G8KVP <john@g8kvp.com> wrote:

Hello All,

Just a word of warning......... from the UK.

I run the parts department of an agricultural dealer, as you can imagine
some of the parts that are delivered to us are large, heavy and you would
think unbreakable. Don't you believe it, in the past year we have had more
damaged, broken, delayed parts than ever before and not to mention the
parts that just don't turn up at all. On top of that because of our
wonderful, self inflicted, Brexit we have had no end of problems with
customs. At the moment we are trying to send an engine (£25,000 worth) back
to Germany, so far it's made 5 trips and been returned each time. We're not
told why it comes back...........

Costs have gone through the roof, a regular customer had a near monthly
order. It used to cost £30 to get it there, it now costs £180! 6 times as
much.

So the moral is, pack extremely well, then do it better. Photograph
everything so you have a record of not only what you've sent but how you've
packed it. Do the paperwork and then get someone else to check the
paperwork. Give it to the courier and wave goodbye.........

Some couriers are better than others, but they have all let us down at
some point.


--
Best regards,
John mailto:john@g8kvp.com







Re: USPS shipments comments

Jim Ford
 

Wasn't there a Dilbert strip like that where the company provided beer for the employees to loosen things up?  They ended up jousting with the forklifts in the warehouse!   Jim Ford Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: Ken Eckert <eckertkp@gmail.com> Date: 10/20/21 8:51 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] USPS shipments comments My wife worked for a while in a BC Liquour control board warehouse, guys would drive the forks into a pallet just for a giggle............


Re: USPS shipments comments

Brad Thompson
 

Ken Eckert wrote on 10/20/2021 11:51 AM:

My wife worked for a while in a BC Liquour control board warehouse, guys would drive the forks into a pallet just for a giggle............

Hello--
I worked for an industrial-robot startup-- some systems were sold to auto manufacturers
and occasional accidents [sic] would take place in which a forklift tine went through
a CRT display screen.

They're out there, folks....

73--

Brad  AA1IP


Re: USPS shipments comments

Ken Eckert
 

My wife worked for a while in a BC Liquour control board warehouse, guys would drive the forks into a pallet just for a giggle............


Re: 454A cover and mesh CRT screen

Roy Thistle
 

Hi Radeng:
Where abouts in Africa are you? They tell me it's a big place!
(Apologies if you not in Africa... but, that's my best guess as to where your to.)
Cheers
--
Roy Thistle


Re: USPS shipments comments

Paul Amaranth
 

It's all over.

I had 3 pallets of solar cells delivered and there was a 20% breakage rate
(glass smashed, frames bent). I think they dropped one pallet off a loading
dock. About the only thing they didn't do was run a forklift straight
through the box.

Paul

On Wed, Oct 20, 2021 at 08:26:09AM -0700, Ken Eckert wrote:
I had a very light meter, Huntron Tracker, that I shipped via Canada Post/USPS. The meter arrived with the back of case smashed and a damaged PCB. The box was totally stove in on one side. After much, much hassle (and not helped by an uncooperative recipient) Canada Post coughed up a partial refund on the shipment. And that was with complete documentation.

They didn't do more since "I didn't pack for machine handling of the package" Bloody hell, the damage was from being crushed. I have packed stuff for years, that damage was not from machine handling.

In talking with our UPS driver, he worked for a while in the warehouse, he watched package handlers deliberately damage shipments by dropping, throwing or hitting packages. The supervisors do nothing.

Great..............
--
Paul Amaranth, GCIH | Manchester MI, USA
Aurora Group of Michigan, LLC | Security, Systems & Software
paul@AuroraGrp.Com | Unix/Linux - We don't do windows


Tek VAR Pot Repair Rings

Jim Adney
 

I'm starting a new thread for these, in the hope that others will see this and respond. I've proposed getting 150 of these "Adney Rings" made by a local machine shop. I have to buy that many in order to get the price down to where I can resell them for $5 each, plus postage. These rings repair Tek-made VAR pots where the set screw attachment to the 1/16" shaft has cracked and no longer holds onto the shaft. This failure seems to be fairly common in the plugins where these pots were used. It appears that they were used in Letter Series, 1-Series, 2-Series, 70-Series, and 3-Series plugins. I'd love to hear that they were also used in later plugins. Please comment if you have corrections or additions. There's photos here, in case you don't remember what I'm talking about:

https://groups.io/g/TekScopes/photo/262268/3196738

Future Adney Rings will come with slightly shorter SST set screws, which may be easier to install and less likely to snag nearby wiring.

So far I have the following commitments to buy "Adney" rings:

J. D.: 10 rings, $5 x 10 + $8 shipping = $58

D. W.: 10 rings, $5 x 10 + $8 shipping = $58

S. M.: 20 rings, $5 x 20 + $8 shipping = $108

M. V.: 10 rings, $5 x 10 + $8 shipping = $58

I'd be happy to hold on to 20 more, which is more than I'll ever use, so that brings us up to a total of 70 rings. Unfortunately, that's still less than half the preorders I need to get my cost down to the point where I can add the SST set screw and sell them for $5 each. That means that they will have to cost much more than $5 each, or other people need to step up and commit to some now, rather than waiting until later. Note that if I decide to hold on to a bunch of these myself, in order to keep the price down now, the future price is sure to go up.

Anyone else out there willing to raise their hand now? As Jeff said, "best to have and not need than to need and not have."

FYI, the machine shop quote I have has expired. I'm assuming they will stick to it for longer than the original time, but that's not assured. No one is committed until all my ducks are in a row. I'll let everyone know if/when this happens.

thanks for reading,

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