Date   

2445

Bob W5UQ <w5uq@...>
 

so, you sage tektronix guys, what does:
channel 1(or2) coupling up (or down) mean? Switch stuck... hmmmmm

I've exercised them all and checked them. Could I have hit too high an RF reading with my probe and blew something on the input. I did use channel 2 on a 440MHZ amp tracing and I may have hit some several watts RF levels. Like about 15 watts.

I tried to stay on the input side of the amplifier, however, it is easy to mistaken the output for the input if the amp is upside down.

Bob


2445

Bob W5UQ <w5uq@...>
 

it looks like the Test and Fail could be:
02 18
I've stepped up and down from it plus when I turn the scope off and back on , the messed up error display comes back a bit different. This time it came on looking a bit better and larger.

Only controls that affects the read out are the two vertical position controls for ch 1 and 2.

Any ideas?
Bob

--

and the beat goes onnnnnn!
W5UQ.com
A25UQ, V31UQ, VP2EEU& VP2MUQ.
QRZ.com is accurate for all calls.


Re: OT: Good price on Tek plugins ;-)

jtjewell83
 

You would think for that much money, he could have posted more than one picture.

Jimmy

--- In TekScopes@..., "gwangju3" <gwangju3@...> wrote:

Here's another seller who has been seriously smoking something.

http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110644035876

His prices are even higher then the prices listed in the Tek catalogs. Maybe he thinks they are vintage and worth more than original prices.

--Victor


Re: Just had to laugh...

santa0123456
 

--- In TekScopes@..., d.seiter@... wrote:

http://cgi.ebay.com/Tektronics-7904-Oscilloscope-/200572389097?pt=BI_Oscilloscopes&hash=item2eb30bc6e9#ht_4179wt_1021
I see there a way to create the first triple beam oscilloscope. Just
needs one more SC502. With 4xSC501 one can make a five beam beast. :-)


TEK 2445

Bob W5UQ <w5uq@...>
 

I could use some help here.

When powering up my 2445, there is an error message on the screen that is unreadable.
It's in focus. Just looks like something is flowing through it vertically causing it to break apart and be unreadable.

Sometimes I "think" it may say Test 05 and Fail 1X the X being 4 or 5 or 0 ..a fat number, not a 1. However...... that is a big guess. It could be Test 02 or 03 or 04 or 05.... I don't think it is 00 as they look different.
If I could tell, I'd know a bit more where to look for why the error message.

I can step through other read outs, using the "mode, source & coupling" switches. But I can't read them still.

If anyone has had this before and know what I need to do to clear up the trace, I'd appreciate an email.
I looked through manual, not finding any help here.

I've taken my 7603 and looked for ripple on all power supply voltages. All seem fine.

Thanks in advance.
Bob


Amazing collection of old "radio" manuals

defish1@...
 

I was looking for an EICO manual and ran across this web site:

http://www.agtannenbaum.com/agtannenbaum.root/shop/

A good collection of older Tek manuals, but I was amazed at the number of Heathkit manuals listed. Click on the Alpha character to see all the company names that start with that character. Looks like some general interest for you radio enthusiasts.

Dan


Re: Just had to laugh...

Artekmedia <manuals@...>
 

Sure Bob .. I have this manual ... I tried to open the file just now though to be sure  and the CD burst into flames

Dave

On 2/3/2011 12:44 PM, Robert Simpson wrote:
 

Gee, a 7904 with a 15MHZ display option. So Dave, heh heh, do you have the what must very rare manual that shows how to connect an SC502 into a 7904?
Bob

--- On Thu, 2/3/11, Artekmedia wrote:

From: Artekmedia
Subject: Re: [TekScopes] Just had to laugh...
To: TekScopes@...
Date: Thursday, February 3, 2011, 5:00 AM

 
Ahhhh this has the dual trace option :-)  ... Based on this guys feedback profile if you win you get TWO boxes of trash instead of one

On 2/3/2011 2:30 AM, d.seiter@... wrote:
 

-- 
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


-- 
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


Re: Just had to laugh...

Robert Simpson
 

Gee, a 7904 with a 15MHZ display option. So Dave, heh heh, do you have the what must very rare manual that shows how to connect an SC502 into a 7904?
Bob


--- On Thu, 2/3/11, Artekmedia wrote:

From: Artekmedia
Subject: Re: [TekScopes] Just had to laugh...
To: TekScopes@...
Date: Thursday, February 3, 2011, 5:00 AM

 
Ahhhh this has the dual trace option :-)  ... Based on this guys feedback profile if you win you get TWO boxes of trash instead of one

On 2/3/2011 2:30 AM, d.seiter@... wrote:
 

--
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


Re: Just had to laugh...

Richard Solomon <w1ksz@...>
 

Also, one of the stock-boys was sitting on the scope when he weighed it !!
 
73, Dick, W1KSZ

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...]On Behalf Of Artekmedia
Sent: Thursday, February 03, 2011 6:01 AM
To: TekScopes@...
Subject: Re: [TekScopes] Just had to laugh...

Ahhhh this has the dual trace option :-)  ... Based on this guys feedback profile if you win you get TWO boxes of trash instead of one

On 2/3/2011 2:30 AM, d.seiter@... wrote:
 

--
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


Re: Tek 422 early model

tom jobe <tomjobe@...>
 

The 422 dates back to before Tektronix provided component layouts.
There is not very much to the HV section.
tom jobe...

----- Original Message -----
From: "Jim Frey" <j.frey@...>
To: <TekScopes@...>
Sent: Wednesday, February 02, 2011 7:54 PM
Subject: [TekScopes] Tek 422 early model


Looking for a pictoral or photo layout of the components in the High
Voltage module.it is not the same as the later versions.
Jim



------------------------------------

Yahoo! Groups Links



Re: 465B troubleshooting continued -Tearing my hair out

bruce seifried
 

A sheet of temperature-sensitive nematic crystals placed against the trace side of the board also works quite well. Temperature gradients appear as different colors. I think these used to be available through Edmund Scientific, back before they went completely silly.

-bruce seifried

On Feb 3, 2011, at 10:09 AM, Paul Amaranth wrote:

If you want to keep your fingers away from the board, one of those
non-contact IR thermometers works great too. Pretty easy to scan
across the board with them.

On Thu, Feb 03, 2011 at 02:36:46PM -0000, fqo65 wrote:


Bob

One of the best trouble shooting devices is your thumb! Feed your power supply into the shorted board, while watching the current...you don't want to burn any traces. Let it cook for a couple of minutes, then start probing with your thumb, feeling for something that is warm...that's your problem.

I've done this many times...works great.

Tad


--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows



------------------------------------

Yahoo! Groups Links



Re: 465B troubleshooting continued -Tearing my hair out

Paul Amaranth
 

If you want to keep your fingers away from the board, one of those
non-contact IR thermometers works great too. Pretty easy to scan
across the board with them.

On Thu, Feb 03, 2011 at 02:36:46PM -0000, fqo65 wrote:


Bob

One of the best trouble shooting devices is your thumb! Feed your power supply into the shorted board, while watching the current...you don't want to burn any traces. Let it cook for a couple of minutes, then start probing with your thumb, feeling for something that is warm...that's your problem.

I've done this many times...works great.

Tad


--
Paul Amaranth, GCIH | Rochester MI, USA
Aurora Group, Inc. | Security, Systems & Software
paul@... | Unix & Windows


Re: 465B troubleshooting continued -Tearing my hair out

Tad
 

Bob

One of the best trouble shooting devices is your thumb! Feed your power supply into the shorted board, while watching the current...you don't want to burn any traces. Let it cook for a couple of minutes, then start probing with your thumb, feeling for something that is warm...that's your problem.

I've done this many times...works great.

Tad


Re: Possibly OT: Frequency Divider boards for sale

 

And give guaranteed low levels of jitter/phase noise - hmmmm if you are suggesting FPGA, I definitely think not.

Regards,
David Partridge

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of Gala Dragos
Sent: 03 February 2011 13:33
To: TekScopes@...
Subject: Re: [TekScopes] RE: Possibly OT: Frequency Divider boards for sale



Really that's just 10Mhz input! I can do that divider with a single chip.


Re: Just had to laugh...

Alexandre Souza - Listas <pu1bzz.listas@...>
 


Re: Possibly OT: Frequency Divider boards for sale

Gala Dragos
 

Really that's just 10Mhz input! I can do that divider with a single chip.
 
----------------------------------------------------------------------------------------------------------------------------------

. Microsoft broke the Volkswagen world record: Volkswagen only made 22 million bugs!


. It is time for us to stand and cheer for the doer, the achiever, the one who recognizes the challenge and does something about it.
-Vince Lombardi


. Everybody can learn how to make kids, but not everyone can raise them right!

From: David C. Partridge
To: TekScopes@...; TekScopes2@...; hp_agilent_equipment@...; TestEquipTrader@...; 'Discussion of precise time and frequency measurement'
Cc:
Sent: Thursday, February 3, 2011 1:48 PM
Subject: [TekScopes] RE: Possibly OT: Frequency Divider boards for sale

 
The documentation in



has just been updated (again) with a new section on test results and choice of power supply

Regards,
David Partridge

-----Original Message-----
From: David C. Partridge [mailto:david.partridge@...]
Sent: 02 February 2011 17:16
To: 'TekScopes@...'; 'TekScopes2@...'; 'hp_agilent_equipment@...'; 'TestEquipTrader@...'; 'Discussion of precise time and frequency measurement'
Subject: RE: Possibly OT: Frequency Divider boards for sale

The documentation in

<http://www.perdrix.co.uk/FrequencyDivider/Frequency%20Divider%202.1.pdf>

has just been updated.

Regards,
David Partridge

-----Original Message-----
From: David C. Partridge [mailto:david.partridge@...]
Sent: 02 February 2011 14:08
To: 'TekScopes@...'; 'TekScopes2@...'; 'hp_agilent_equipment@...'; 'TestEquipTrader@...'; 'Discussion of precise time and frequency measurement'
Subject: Possibly OT: Frequency Divider boards for sale

I have just shipped out a large batch of the updated version of my frequency divider boards.

I have about 20 complete boards (with all components fitted except RF connectors) available for sale.

The cost for these is GBP70 each including "Signed For" delivery to anywhere on the planet (GBP65 for UK customers).

I also have a similar number of bare 4-layer printed circuit boards available.

The cost for these is GBP20 each including postage ("Signed For" is GBP5 extra).

Details here:

<http://www.perdrix.co.uk/FrequencyDivider/Frequency%20Divider%202.1.pdf> and



PS I really will get round to doing something with the website ...

Regards,
David Partridge





Re: 465 Low Serial # Manual

Artekmedia <manuals@...>
 

Gala

We have the low serial version of the manual


Contact us off list for details

Dave
Artekmedia


On 2/3/2011 1:35 AM, Gala Dragos wrote:
 
Since we are talking about manuals,  I have a 465 (plain) with a serial number before B199999 and the only manuals I could find are for B250000 and above. Maybe someone has a manual for it ?

-------------------------------------------------------------------------------------------------------------------------------------------

. Microsoft broke the Volkswagen world record: Volkswagen only made 22 million bugs!


. It is time for us to stand and cheer for the doer, the achiever, the one who recognizes the challenge and does something about it.
-Vince Lombardi


. Everybody can learn how to make kids, but not everyone can raise them right!

From: Artekmedia
To: TekScopes@...
Cc:
Sent: Thursday, February 3, 2011 5:52 AM
Subject: Re: [TekScopes] Re: 465B troubleshooting continued -Tearing my hair out

 
Bob

What is the serial number of your unit?

Dave


On 2/2/2011 9:41 PM, rc_engelhardt wrote:
 
Both Tom & Reed suggested testing C1466, but neither my schematic nor parts list shows a C1466. I figured that my scope is a different rev. Later, I'm doing some trace tracing and I find C1466!! WTF? And the circuit around the gain adjustment pot(R1482) isn't the same as the schematics. %^&*^$%%

My schematics came from http://manoman.sqhill.com/ and are the same document number as http://artekmed.startlogic.com/ has for my serial number. Nevertheless, I've ordered a manual for artekmed with the hope that it matches my scope.

I did however check the caps C1597 & C1095 as suggested by Reed & they were OK. Well, one is now broken by my ham-handed unsoldering.

J1565 was oriented right (the scope had been working).

My ohmmeter is 4-1/2 digits, so I didn't try Dave's suggested to check 15v trace resistance to ground.

I don't have a curve tracer - I'm really a newbie.

I was thinking of using an independent source for the 15v & was glad to have that idea confirmed by Ed. I started out at 5v (which dropped to under a volt under load) and drew a current of 5A !!! On my (wrong) schematics, there is no place a single component failure could create such a short. Unless it's that mysterious (to me) C1466.
Or a trace-to-trace fault on the back side of the board. I didn't see any smoke nor smell anything & I only let it cook for a couple of seconds.

Next I'll check that C1466, now that I know where it is. The new service manual needs a password to download, so I'll have to wait for that.

Thanks for all the advice - this is a great group!

Bob


-- 
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089




-- 
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


Re: Just had to laugh...

Artekmedia <manuals@...>
 

Ahhhh this has the dual trace option :-)  ... Based on this guys feedback profile if you win you get TWO boxes of trash instead of one

On 2/3/2011 2:30 AM, d.seiter@... wrote:
 

-- 
Dave & Lynn Henderson
Manuals@...
www.Artekmedia.com
PO Box 175
Welch,MN 55089


Re: OT: Good price on Tek plugins ;-)

Tim Phillips <tim@...>
 

from Tim P (UK)
 
He seems to have got the rest of his prices from a random-number-generator:
 
$769.60,  $55.68, etc
 
Tim
 



Re: 7A13 old mechanical counter parts needed

Pete
 

I have a RS trade counter near Cardiff ...they will except cash payments as long as you bring an order on a letterhead...stupid really as anyone can print one out!

They should either be account only or open to all!...no point having an inbetween

Pete


From: David C. Partridge
To: TekScopes@...
Sent: Thu, February 3, 2011 11:51:45 AM
Subject: RE: [TekScopes] Re: 7A13 old mechanical counter parts needed

 

Hmmm I think this may be Germany versus UK thing - RS in UK happily accept my orders (I have had a payment with order account with them for a long time) and I don't have a VAT registration.

Regards,
David Partridge

-----Original Message-----
From: TekScopes@... [mailto:TekScopes@...] On Behalf Of haubmi1
Sent: 03 February 2011 11:39
To: TekScopes@...
Subject: [TekScopes] Re: 7A13 old mechanical counter parts needed

> Perhaps RS still accept individual orders via their (crippled accountant search tool) website?

No they don't. I tried to register and order. A day later i received a automatic mail in which they ask for the busines tax ID and said if they don't get this they will drop the order.

There is an other seller, which sells RS-Components stock:
www.mercateo.com
They discribe semselfes as also only selling to bussines customers.
I did not try it there up to now.

Farnel or CPC (did not know) are no option here, as they dont have the gears.

Regards
Michael


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