Date   

Re: Peter Keller book payments PayPal won't release

Chuck Harris <cfharris@...>
 

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






Re: 2710 mpu lockup on start. Help!!

WB6GHK
 

My first guess is that you have gotten close to the problem; the A10 microprocessor board.
I haven't seen very many problems with the A10 board, but when they break everything acts weirdly.
Tough part is that you are dealing with someone's failed repair and who knows what they did to the unit.

If you have downloaded the manual (there are several versions, get the latest version and work backwards to your serial number) scope check the RST line on the microprocessor, supply voltage, clock signal, and bus activity. Wait for the fail and then see what signals change. If you don't want to sit there all day, video record the scope screen. Intermittent problems are the hardest to find.

Surface mount parts can also break or come partially unsoldered, so do a good visual inspection of the A10 board. Also make sure that there aren't any loose connectors, cables go to the right connectors, or mechanical issues that can cause problems.

Start here and report back.

BTW, if Tek can repair/calibrate (not likely, they don't have spares and personnel) it would probably cost way more than buying a good refurb.


Re: Resistor in series

Colin Herbert
 

I might add that this thread started as an addition to another original thread:

"Yes, this thread is a response to my thread "Fix or Part Out a 475A" and specifically is a discussion of the perplexing arrangement of resistors R1354 and R1356 across the collector-emitter of the Q1354 transistor in the beam intensity amplifier circuit."

I have filed it under 475A, but the further discussion has little to do with the 475A.

Colin

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Tom Lee
Sent: 02 December 2020 17:34
To: TekScopes@groups.io
Subject: Re: [TekScopes] Resistor in series

No question that it's been a very interesting thread. But as one who
spends much of his life with search engines, I'm always sensitive to how
well subject headings reflect thread content, hence the observation
about drift. Future readers might well be interested in baking resistors
and filing notches in them, but "Resistors in series" won't help them
much to find such (horrifying, as you say) gems.

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu

On 12/2/2020 08:28, Jeff Dutky wrote:
Tom Lee wrote:
Maybe a new thread should be started, as this seems to have drifted (pun intended).
I think that this thread has stayed remarkably on-topic, maybe even become more so as it aged.

I'm absolutely fascinated by both the insight into the working (and failing) of what I always thought of as the second simplest element of any electronic circuit. I'm fascinated (and horrified) by the stories of how people trimmed such resistors in practice.

-- Jeff Dutky





Re: Resistor in series

Tom Lee
 

No question that it's been a very interesting thread. But as one who spends much of his life with search engines, I'm always sensitive to how well subject headings reflect thread content, hence the observation about drift. Future readers might well be interested in baking resistors and filing notches in them, but "Resistors in series" won't help them much to find such (horrifying, as you say) gems.

--
Prof. Thomas H. Lee
Allen Ctr., Rm. 205
350 Jane Stanford Way
Stanford University
Stanford, CA 94305-4070
http://www-smirc.stanford.edu

On 12/2/2020 08:28, Jeff Dutky wrote:
Tom Lee wrote:
Maybe a new thread should be started, as this seems to have drifted (pun intended).
I think that this thread has stayed remarkably on-topic, maybe even become more so as it aged.

I'm absolutely fascinated by both the insight into the working (and failing) of what I always thought of as the second simplest element of any electronic circuit. I'm fascinated (and horrified) by the stories of how people trimmed such resistors in practice.

-- Jeff Dutky




Gauging interest in a run of reproduction knob tips

thespin@...
 

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


Free older DRAM and SRAM, plus mystery National 07AN smd parts

 

I found a small stash of older memory parts, all safely anti-static stored:
MK4516N-15 (8)
MCM4164BP15 (16)
AM9101PC/P2101-2 (2)
MBM2147E (1)
SMJ4016-20JDM (8)
Free to anybody that can use them. Also have a medium roll of tiny SMD parts from national, had to use a magnifier to see the package markings: <logo> 07AN X2322 SLBC. free to a good home. I couldn't find a reference to this code. You can have all or some of these parts, as you wish. Might bring something good back to life.

regards,
walter (walter2 -at- sphere.bc.ca)
sphere research corp.
https://www.sphere.bc.ca/test/stuffday.html


Re: 465 B sweep switch cam

Dave Peterson
 

Now all I need is the board layout for 250000 & above. I'll have to study the TekWiki - it's probably there. The manual I have is obviously for lower SNs. It does have changes that include the A5 Vertical Out, but even that doesn't match the component numbers on mine. So I should be able to count cams and switches for both low and high SNs. I'll post what I find.

I think I'm learning a $12 lesson a particular evolution of this scope. That's cool. That's a reasonable education cost.

Thanks so much for these particulars Håkan. This is why I'm enjoying focusing on the nitty-gritty details of this rebuild. I'm learning not just the function of the scope, but the physical particulars, the options, and its evolution over time.

Dave


Re: 465 B sweep switch cam

 

On Wed, Dec 2, 2020 at 04:38 PM, Dave Peterson wrote:


Is the 105-0614-00 shorter than 105-0364-00?
I have no info on the length but if you check the board layout of A7 if the manual for B250000-up you
can see that the B-sweep switch has 11 contacts which would match the shorter one on your pic.

There were also 105-0614-01 and -02 but they don't seem to be a direct replacement since for repair
the -00 was replaced by a complete switch assy, 263-1086-00, for S/N B250000 - B315029.
The -02 was a direct replacement for the -01.

/Håkan


Re: Peter Keller book payments PayPal won't release

greenboxmaven
 

You have my permission to do or say whatever you need to release the PayPal payment. I thoughtI had done so by marking the item as received, but maybe it didn't work. Bruce Gentry, KA2IVY

On 12/2/20, 11:20, 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





Re: Resistor in series

 

Tom Lee wrote:

Maybe a new thread should be started, as this seems to have drifted (pun intended).
I think that this thread has stayed remarkably on-topic, maybe even become more so as it aged.

I'm absolutely fascinated by both the insight into the working (and failing) of what I always thought of as the second simplest element of any electronic circuit. I'm fascinated (and horrified) by the stories of how people trimmed such resistors in practice.

-- Jeff Dutky


Re: PayPal's "Friends and Family" problem (Peter Keller's book order)

 

Hi Dennis,
I've missed the deadline to order the book by about a couple of days - I
didn't know about the print run since I was ill for a half year. Is it
still possible to order an additional copy? Via PayPal of course (it works
for me)

Best regards

On Wed, Dec 2, 2020 at 5:08 PM Dennis Tillman W7pF <dennis@ridesoft.com>
wrote:

PayPal is causing problems for a few members who have ordered Peter
Keller's
book and are trying to pay for it using PayPal.

This comment I found in a PayPal Q&A web page from someone who could not
find the "Friends and Family" option for sending money might explain why
PayPal is withholding the money. You have to uncheck the default "Purchase
Protection" option, and select "Send without protection" instead.
***
"I too, noticed today that I no longer have the Friend and Family option.
So
I proceeded anyway and was presented with a dialog regarding Purchase
Protection. It seems the default (for me, at least) is set to 'Add Purchase
Protection'. The dialog will state that this is free for you - the sender,
but will charge a fee to the recipient. If you select 'Send without
protection', the recipient is not charged a fee."
***

This is possibly why the money sent by the following people is stuck in a
"Catch 22" situation. I have not received this money you sent. PayPal has
it
and will not give it to me until I send you Peter's book. But I can't pay
Peter for your book since I don't have your payment:
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

There is very little time left to get me your payment if you still want
Peter's book.
Dennis Tillman W7pF







Peter Keller book payments PayPal won't release

 

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


PayPal's "Friends and Family" problem (Peter Keller's book order)

 

PayPal is causing problems for a few members who have ordered Peter Keller's
book and are trying to pay for it using PayPal.

This comment I found in a PayPal Q&A web page from someone who could not
find the "Friends and Family" option for sending money might explain why
PayPal is withholding the money. You have to uncheck the default "Purchase
Protection" option, and select "Send without protection" instead.
***
"I too, noticed today that I no longer have the Friend and Family option. So
I proceeded anyway and was presented with a dialog regarding Purchase
Protection. It seems the default (for me, at least) is set to 'Add Purchase
Protection'. The dialog will state that this is free for you - the sender,
but will charge a fee to the recipient. If you select 'Send without
protection', the recipient is not charged a fee."
***

This is possibly why the money sent by the following people is stuck in a
"Catch 22" situation. I have not received this money you sent. PayPal has it
and will not give it to me until I send you Peter's book. But I can't pay
Peter for your book since I don't have your payment:
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

There is very little time left to get me your payment if you still want
Peter's book.
Dennis Tillman W7pF


Re: 465 B sweep switch cam

Dave Peterson
 

Thanks Håkan,

Is the 105-0614-00 shorter than 105-0364-00? My SN is 310XXX.

Dave

On Wednesday, December 2, 2020, 02:40:12 AM PST, zenith5106 <hahi@telia.com> wrote:

105-0364-00 is for 465 below B250000
465 B250000 and up used: 105-0614-00.

/Håkan


Re: Scope schematic needed...

Ken Eckert
 

Don't know if this will help or give you some fresh links to follow... Perhaps Ballantine can help?

https://www.philcoradio.com/phorum/printthread.php?tid=11233


Scope schematic needed...

WB4IUY
 

I need a schematic for another brand and have been looking high and low, but no avail... Would any of you know where I might find a schematic for a Ballantine model 1032A scope?

Thanks in advance,
Dave


2710 mpu lockup on start. Help!!

Rodric@...
 

Hello good ol' Tek guys.

You will please pardon me since this is my first attempt at obtaining help on a group, but here goes:

I'm a 70yr old two-way bench tech, started in the tube/vibrator/dynamotor PS era; Motorola and GE. Component level repair. But! all analog. (hey, I was pretty futzed when transistors started to infiltrate!) I'm very weak in digital systems.

For fun I bought a 2710 SA for repair. The seller claimed FP switches were responsive, just no display. Tube problem! ?
When I got it it was as adv, very clean. On power up, fan running, LEDs on, buttons seemed to do something. So I looked at the crt, and found damaged pins and connector on the CRT, repaired, got flash on power up, and a stationary dot! Cool! now I needed to trub. the sweep ckts, found someone had removed the U911 switch that alternates log/dig info to the display. Found replacement on Mouser, installed, got sweep! Spectrumish, but no digital stuff: no menus, measurements, couldn't tell much about where I was in system. Cool again, now I'm squirming in my chair with delight. Fed the box a 25MHZ sig and got something like a freq domain display , but all kinds of messed up. front panel did change things.
Time to look at the PS voltages/ripple. Found and set voltages (10, -11, 5, -115) and VIOLA! she popped to life! The dig portion of the display was alive, The FP was responsive, I could set things like Start and stop freq span, the cursor dot moved via the freq/marker knob OHBoy! I'm a freekin genius! Life!

The first LO YIG (didn't have a clue at all about that little ball until now) started talking at that same time: a kind of irritating mid-range buzz. I don't know if that's normal, totally ignorant about these devices, and nowhere on the net can I find any reference to YIG noise (acoustic not electrical), so let me know about that, please.

THE PROBLEMS:
So when I was adjusting the marker freq with the knob, I got slapped: the instrument reset! From where I had adjusted it via menu, it reset to default: to full span, etc, cold start kind of setup. Any time I moved the marker VERY FAST it would do a "hot-start" kind of reset back to default. By hot start I mean no time elapsed between my setup, turning the knob, the message flash and the default screen. It would be more patient if I moved the cursor slowly, but eventually would reset.
Sometimes it said something like "Frequency feedback loop failure" and show nvram stuff for a brief flash, other times it would just flash "NVRam installed, blah, blah" (maybe rev. no.s, too fast to read), and reset as above.
BUT! I had V/H sweep, frequency related functions, and could see my signal. Even had the digital stuff. So enough for that day.

Next day I powered up and checked PS voltages (all good), none seemed to change much on reset problem. So back in it's case, I let it run for a couple of hours to thoroughly warm up, and when I came back to the bench, there was no YIG noise, no display, and a completely non-responsive FP. &^%$#@!. When I restart an interesting thing occurs: brief flash on CRT, and a click around the YIG, and a few LEDs close to the display light up. When I repeat power on, the LEDs that are lit increase, from the display out to the left. A few are added each time, until all are lit. There is a shift register involved that talks to the FP for these LEDs, so...? But the FP is non-responsive. There is a second click around the YIG after a few seconds. That's it.

Opened it up, checked PS Vs, no change. With an oscilloscope I looked at the MPU lines at the edge connector on the MPU board. No digital action whatsoever. I monitored address lines and restarted the machine, and do see brief pulses of data on start, then dead. Almost all data lines are either low, or high impedance. no action on any other pin. VDD is good (4.78 V), good grounds. Seems like the MPU is ok, but something is causing it to halt operation.
There are lines, A9, A12, , A13, A18 which are high. As for the control signals, Low RD, low hold, DT/R and low InitA are high.
Haven't checked the clock yet.

I am way out of my depth here, but it seems something is sure stopping the MPU; a bad checksum somewhere? I pulled the ROM and read them (and saved images JIC!)..meanwhile I checked continuity of the bus between ROMs and checked the 40? condutor cable that is the bus between boards. BTW, battery backup (nvram) = 3V, and there is a tiny bit of corrosion product showing up as a white powder, but no trace damage (yet!)...if I get this running again, Then I'll address that changeout. I'd love to replace the NVRam with true NV ram like those Ramtron chips..(I do pinball)....

I don't know what the start sequence is: yeah, the SM says that the Frammer Cumulator is sequenced in step and added to the reet, and if this total is relevant then the ....HELP! ELIFive! I.E. I can't follow the jargon, unfortunately.

Sorry for the book, but it's the history so far. Please Spectrum Analyzer Digital Gurus, I need you, Obi-Wan Kanobi!

With the greatest of respect,
Rod Davis

PS, it would be a buzz killer, but does anyone know if Tektronix is offering repair/calib. on these? They are for older DSOs I read.


Re: OT: request for Ballantine 1032A DC -> 25MHz dual trace scope svc man.

WB4IUY
 

Hi Michael, I know this is old, were you able to locate something? I'm also in need of a schematic to repair my Ballantine 1032A.

Thanks,
Dave


Re: 465 B sweep switch cam

Michael W. Lynch
 

On Wed, Dec 2, 2020 at 04:39 AM, zenith5106 wrote:


Could this "new" 105-0364-00 belong to something like a 475?
No, the 475 parts are a beast unto themselves. Strangely, there was no standardization of that mechanism, even thought the scopes are very similar. Come to think of it, The 475 never seems to fail and the 465 (at least the late s/N models) are prone to failure.

--
Michael Lynch
Dardanelle, AR


Re: I give up.

Jean-Paul
 

Just post Dennis a check

he mentioned his adresse

Jon

10721 - 10740 of 184664