Date   

Re: eBay phishing

Andreas <signupbox@...>
 

The phishing pages can be easily recognized because:

1. eBay will never ask you for personal data as password, Credit Card number or s.o.
2. they aren't secured pages (no HTTPS protocol!)
3. the rerouted data belongs to the domain "k3.com" (no doubt this is not under eBay's domain) masked into a long and weird URL

More danger comes with the fact that the incriminated pages requests your Credit Card info.

This attempt has been really easy to counter fight.
The authors of this action have been already found and I suppose eBay has informed its legal-office for starting the consequent procedure.

It seems that "about.com" is involved too with this affaire, because they accepted to register an evidently illicit subdomain containing the leftmost characters of a string eBay already uses in its existing URLs.

No further comment.

Andreas.



Ben Clarke wrote:

At 00:25 22/01/04, Craig Sawyers wrote:

If you DO make the mistake of filling in the spoof form, you will have given
your log-on details (name and password) so some shady third party, who can
then get access to all your eBay account information.
Though you may not want your account details to be accessible to someone else the real danger here is of 'Identity Theft'.
The spoofers are looking for an account with a nice high number of solid positive feedback reports, ie a trustworthy eBay seller.
Once they get the password they change the email address to their own Hotmail one, then put a brand new, top of the range, Apple laptop, or similar high value item up for sale with a Buy It Now at less than half it's value. To all intents and purposes it looks like a very good, safe, deal so within a couple of hours they will get some poor punter hooked. He sends his money but never sees the laptop of course, eventually he complains to eBay who point the finger at you.
Beware,
Ben
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Re: How to ruin a 535...

Robert Morein <morepub@...>
 

If you do that, you should know that the 6BQ7A may have been an older tube that had a mechanically fragile structure. Simply moving the scope around could cause tube failure. The later "frame grid" tubes were an advance in shock resistance.

I can't remember for sure whether the 6BQ7A is the problem tube, but I encountered this with a 545.

----- Original Message -----
From: Tony Denning
To: TekScopes@yahoogroups.com
Sent: Wednesday, January 21, 2004 8:16 PM
Subject: [TekScopes] Re: How to ruin a 535...


--- In TekScopes@yahoogroups.com, "Craig Sawyers" <c.sawyers@t...>
wrote:

I bought a scope on eBay which had all the 6BQ7A's replaced with
6DJ8 - the Amperex "Orange Globe" variety - which from my cursory
research, seem to be fetching a premium on eBay. Can't understand
it myself... but anyway, it looks like there's some money to be made
here. I'll pull all the 6DJ8s and replace them with some JAN
6BQ7A's that I bought for next to nothing, and sell the 6DJ8's to
some audiophile nutter... that should cover my original investment
in the scope and repair parts (and repair parts for the next 40
years).

Cheers,
Tony


>> Yup. I've seen a few on eBay sans tubes over the last year.
Suppose the
> equation is that the 18 or more 6DJ8's are worth a mint to the
audio folks
> (perhaps $20 each), whereas a fully working 5xx series scope will
only get
> $50 maximum.
>
> Very glad that my 545A has the full complement of firebottles!
>
> Craig



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Goverment Auction in Norfolk, Va.(Lot's of Tektronix Scopes)

Bill Smith <ko4nrbs@...>
 

Here is five 453 scopes as a lot with the bid now at
$35.00.
http://web.govliquidation.com/auction/view?id=312815

Lot's of 465 and 475 scopes there as well.
http://origin.govliquidation.com/list/c7234/lna/3.html

Auction is over in 6 hours!!
Bill


=====
Bill Smith KO4NR

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Re: BAMA

jeans <jeans@...>
 

Hi michael, BAMA is working fine here (Australia) <http://bama.sbc.edu/>.
Don Black.

Michael Dunn wrote:

I haven't been able to get into BAMA for days! Anyone NOT having probs?




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To visit your group on the web, go to:
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Re: eBay phishing

benclarke_uk
 

At 00:25 22/01/04, Craig Sawyers wrote:
If you DO make the mistake of filling in the spoof form, you will have given
your log-on details (name and password) so some shady third party, who can
then get access to all your eBay account information.

Though you may not want your account details to be accessible to someone
else the real danger here is of 'Identity Theft'.

The spoofers are looking for an account with a nice high number of solid
positive feedback reports, ie a trustworthy eBay seller.

Once they get the password they change the email address to their own
Hotmail one, then put a brand new, top of the range, Apple laptop, or
similar high value item up for sale with a Buy It Now at less than half
it's value. To all intents and purposes it looks like a very good, safe,
deal so within a couple of hours they will get some poor punter hooked. He
sends his money but never sees the laptop of course, eventually he
complains to eBay who point the finger at you.

Beware,

Ben


Re: Tek Circuitry Book (1962)

robin.birch@...
 

But they won't ship outside of us or ca - sob :-). ANy one got one that
they'll sell to the uk?

Cheers

Robin



"Tony Denning"
<tdenning@sympat To: TekScopes@yahoogroups.com
ico.ca> cc:
Subject: [TekScopes] Tek Circuitry Book (1962)
22/01/2004 02:41






Good book for sale on eBay for those interested in the older
tube/valve Tek scopes...

http://cgi.ebay.ca/ws/eBayISAPI.dll?
ViewItem&item=3072593242&category=15050

Cheers,
Tony




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Re: Tek Circuitry Book (1962)

Craig Sawyers <c.sawyers@...>
 

Good book for sale on eBay for those interested in the older
tube/valve Tek scopes...
That's a good book. If you have a 535, 545 or 555 you'll find that the book
deals with the design principle behind every circuit in it. Written at a
time when Tek was seriously proud of what it did, and not paranoid about
plagiarism of its schematics and know-how. Can you image them now
publishing a detailed technical treatise about their DPO's?

Craig


Tek Circuitry Book (1962)

oldtek2003
 

Good book for sale on eBay for those interested in the older
tube/valve Tek scopes...

http://cgi.ebay.ca/ws/eBayISAPI.dll?
ViewItem&item=3072593242&category=15050

Cheers,
Tony


Tek T912 Intensity?

manfromtrane <ccramb@...>
 

Dear Group,
I am needing some advise on a T912 scope. I got it from an auction on
Ebay. It appears to be brand new. It had the usual problem of the
capacitor 478 shorted which drops the +120. After correcting that I
was able to get a display. The next item is that the traces are a
little wider than needed and the background of the screen has green
glow. Not as bright as when you turn on the storage but the same
contrast behind traces. I have checked all the power supplies, Astig
is funtioning, Focus is functioning and down the circuit from the
intensity and Z axis appear to be giving the right voltage and wave
forms. The high voltage supply or the CRT is making a high pitch
sound when I turn the intensity up. It quiets down when I turn it
down. If I turn the intensity clear down I should not have any trace
display but that is not the case. It dims but is still very visible.
I am thinking that High voltage must be in a runaway and is too high
and isn't being reduced enough to back off the display. I don't have
access to HV probe so that is a problem I know. Could this be a CRT
problem or something outside of it? Any help would be greatly
appreciated.


Re: How to ruin a 535...

Bill Lewis <wrljet@...>
 

I got my 180A like that. Only had to dig up the 52 tubes to put it back on the air.

Had a few others like that as well.

Bill

From: "Albert LaFrance" <lafrance@att.net>

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2590535177

Albert


Re: How to ruin a 535...

oldtek2003
 

--- In TekScopes@yahoogroups.com, "Craig Sawyers" <c.sawyers@t...>
wrote:

I bought a scope on eBay which had all the 6BQ7A's replaced with
6DJ8 - the Amperex "Orange Globe" variety - which from my cursory
research, seem to be fetching a premium on eBay. Can't understand
it myself... but anyway, it looks like there's some money to be made
here. I'll pull all the 6DJ8s and replace them with some JAN
6BQ7A's that I bought for next to nothing, and sell the 6DJ8's to
some audiophile nutter... that should cover my original investment
in the scope and repair parts (and repair parts for the next 40
years).

Cheers,
Tony


Yup. I've seen a few on eBay sans tubes over the last year.
Suppose the
equation is that the 18 or more 6DJ8's are worth a mint to the
audio folks
(perhaps $20 each), whereas a fully working 5xx series scope will
only get
$50 maximum.

Very glad that my 545A has the full complement of firebottles!

Craig


Re: How to ruin a 535...

Craig Sawyers <c.sawyers@...>
 

I am sorry to say, but this is not the first one, neither it will be the
last one, ruined that way.
Yup. I've seen a few on eBay sans tubes over the last year. Suppose the
equation is that the 18 or more 6DJ8's are worth a mint to the audio folks
(perhaps $20 each), whereas a fully working 5xx series scope will only get
$50 maximum.

Very glad that my 545A has the full complement of firebottles!

Craig


eBay phishing

Craig Sawyers <c.sawyers@...>
 

Hi all

Just a warning to beware a message which seems to come from eBay, but
doesn't. It says that there has been an attempt to log onto your account
from a different country, that eBay have suspended the account, and provides
a link to re-enter your details.

Whatever you do, DON'T!

This is one of those spam attempts to gather your information for illegal
use, otherwise known as "phishing". The page address looks similar to the
correct eBay sign-in one, but isn't (it is missing /cgi-bin/ and a few other
bits), and the html is totally different to the correct eBay page. The
clincher is that the return address if you click the sign in button is very
different.

If you DO make the mistake of filling in the spoof form, you will have given
your log-on details (name and password) so some shady third party, who can
then get access to all your eBay account information.

Craig


BAMA

Michael Dunn <mdunn@...>
 

I haven't been able to get into BAMA for days! Anyone NOT having probs?


Re: How to ruin a 535...

Miroslav Pokorni
 

I am sorry to say, but this is not the first one, neither it will be the
last one, ruined that way. The 585 that I have, was a working scope and a
guy pulled out all ECC81 and gave me the remainder, even helped me to load
it into car.

What can I say, not everyone appriciates those old scopes.

Regards

Miroslav Pokorni

----- Original Message -----
From: "Albert LaFrance" <lafrance@att.net>
To: "TekScopes" <TekScopes@yahoogroups.com>
Sent: Wednesday, January 21, 2004 8:08 AM
Subject: [TekScopes] How to ruin a 535...


http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=2590535177

Albert




How to ruin a 535...

Albert LaFrance <lafrance@...>
 


465m low voltage

viperdss <viperdss@...>
 

I have a 465m that has a voltage problem. The led on the front panel
flashes indicating low line voltage but it checks at 119.8. On the
voltage test points inside the -5 reads -3.8, the +5 and 32 are fine.
Is there a commen problem with these or does anybody have any
suggestions? Thanks


Need replacement slope pot for 465

ednja
 

Does anyone know of a place to order parts for a 465?
Ed


Re: 5642 vs Solid State Rectifier

Morris Odell <morriso@...>
 

Is there any benefit (i.e to scope performance) in retrofitting the
5642 HV rectifiers on older scopes with those solid state
replacements? What is a reasonable life expectancy (i.e. hrs) for a
5642? I'm guessing that the forward drop across a 5642 is somewhat
greater than äcross the solid state equivalent, but since this
modification can been done successfully, there must be enough HV
adjustment "room" on most scopes to accomodate this difference.
This is an interesting subject about which a lot can be written. I've
worked on a lot of Teks with Hv problems and here's what I think:

1. There's no point in replacing them just because you can. The scope
will work just as well with 5642s or Si diodes. "If it ain't broke,
don't fix it" applies here.

2. I've never seen a 5642 "wear out" but I have seen the leads corrode
off.

3. If you replace one, replace them all. Scopes like the 545 or 547 have
5 of them. The 556 has 7! If you replace only one it may affect the
balance of the various voltages applied to the CRT and make adjustment
or calibration difficult. This is especially true if you replace only
the cathode supply rectifier which affects the feedback control of the
HV voltage. If you need to remove the HV xfmr for any reason you will
probably want to replace the 5642s at the same time as reinstalling the
filament loops is a very messy job. All the HV xmrs I have had rewound
had no room left for the filament loops anyway so I've had to do this
several times.

4. I've seen advice to the effect that if you replace the 5642s it's a
good idea to increase the value of the screen resistor to the oscillator
tube by 20% or so. This is said to compensate for the lower power
consumption without the 5642 filaments and the lower operating point due
to the lower forward voltage drops in the Si diodes. I've never done it,
but I can understand the logic behind it.

5. If you replace them you will need to reset the HV voltage and
recalibrate the scope.

6. You need proper fast recovery HV diodes. Ordinary 1N4007 types in
series are not suitable. You can get HV low current fast diodes from
places that sell Tv repair parts. The ones I use are tiny - they look
like a thickening in a piece of wire with a tiny black dot at one end
and are rated at 18 kV 5 mA. Despite their appearance they work really
well.

My $0.02 worth....

Morris


5642 vs Solid State Rectifier

oldtek2003
 

Is there any benefit (i.e to scope performance) in retrofitting the
5642 HV rectifiers on older scopes with those solid state
replacements? What is a reasonable life expectancy (i.e. hrs) for a
5642? I'm guessing that the forward drop across a 5642 is somewhat
greater than äcross the solid state equivalent, but since this
modification can been done successfully, there must be enough HV
adjustment "room" on most scopes to accomodate this difference.

I bought 5 NOS 5642s on eBay about 6 months ago for around $10 and
have since seen quite a few others for sale, so there seems to be a
reasonable supply available, at a reasonable price. Personally, if
a scope originally came with 5642s, I'm inclined to replace with the
same...guess I'm a purist. Comments anyone?

Regards,
Tony Denning

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