Date   
Re: Looking for ...

Vintage Test
 

Ok Chris,

Let me get the scales out and do some weighing! It would be much preferable to send the entire module, as I know it works, and includes the driver power transistors. I have things on over the next two days, but first thing Wednesday, i’ll Get you some costs.

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: 7000 series white plug-in connector

Vintage Test
 

That’s good to hear Colin,

As an aside, the connector will dismantle into the body, sides and the connector pins. However, getting it back together is a right pig’s ear! If your rigid extender is just missing it’s sides, you can remove them from the new connector, but be prepared for all of the connecting pins dropping out! Yes, a tenner will be fine. My PayPal address is the same as my email address.
Many thanks,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: TekScopes Policy Regarding Contacting Members Off-List

 

Dennis Tillman W7PF
Aug 30 #150747

Hi Dave,

"The internet is rapidly eroding the privacy of individuals everywhere on earth. Each of our members is entitled to the protections of, and governed by, their nation's privacy laws. But we are an organization comprised of members worldwide so it may be unclear what is allowed and not allowed. Another way to summarize what I was trying to say would be this:"

We hope that the revelation of email addresses is not abused. However as long as non-members can view, we cannot trust them. If someone doesn't get it right and say make a new email for this, they are vulnerable. Luckily, this is not Facespace or Mybook or any of that. Personally I got to the point where I do not care, and that is because I get very little spam. I found out where it came from and took care of it. Now I am getting spammed by the Trump people, and while I do support him to some extent I am not ready to "join". And they all do that. Trump didn't some other whatever entity did it.

I got more spam from places that are "safe" than "unsafe" except for a few.

"Becoming a member of TekScopes does not give a member permission to contact another member outside of TekScopes without prior permission."

OK, then it reconciles with what you said about taking some things off group. So if someone is selling something, well first of all we don't need to know the details, especially if they use Paypal or something like that. We REALY don't want that info in the open forum because it is not secured. And I am not bitching about that, it is good for people with a genuine interest in Tek etc. to find us, and interesting and join. Even if they have stuff to sell, WE WANT IT. But the details of the sale go private. Sounds good to me.

"Dennis Tillman W7PF"

Yes sir, you are pretty good at this.

I have not read the rest of the responses yet, but I will and be back with whatever. Then you can take it or leave it.

For some reason this quoting thing is not working well for me, might be my browser, but whatever.

Re: Tek 466 analog storage

Paul B.
 

Many thanks for that; good idea!
I'm just a bit bamboozled by the fact that the schematic you mention shows that line from the fuse going to the primary winding of a transformer. If it's +15V unreg as stated, I can't see how this 15V DC to a transformer primary is going to give any outputs from the secondary side! Maybe I'm reading it wrong (don't have my glasses so it makes following schematics very difficult!)

Re: 7704A Replacement CRT: 154-0644-00 ?

Pete Lancashire
 

You have 135th one off the production line. Your deduction on the part
number is correct the last two digits are the major rev level. For your
scope any revision of the CRT will work.



On Sun, Sep 2, 2018, 1:06 PM ulf_r_k via Groups.Io <ulf_r_k=
yahoo.com@groups.io> wrote:

Gentlemen,

I am considering replacing the CRT on an old 7704A
that is worn out. According to Sphere, the part number
is 154-0644-05, but my mainframe S/N B010136 has a
CRT labeled 154-0644-00

Before I go hunting:

Is the -05 a later replacement/suitable
for my mainframe or is the -05 a typo?

Cheers

Ulf Kylenfall / SM6GXV



7704A Replacement CRT: 154-0644-00 ?

ulf_r_k
 

Gentlemen,

I am considering replacing the CRT on an old 7704A
that is worn out. According to Sphere, the part number
is 154-0644-05, but my mainframe S/N B010136 has a
CRT labeled 154-0644-00

Before I go hunting:

Is the -05 a later replacement/suitable
for my mainframe or is the -05 a typo?

Cheers

Ulf Kylenfall / SM6GXV

Re: Tek 466 analog storage

Roger Evans
 

If you remove the fuse in the 15V unregulated supply to the high voltage inverter (z-axis / crt schematic) you remove both the high voltage to the CRT and the CRT filament supply so that should keep the CRT safe.

I would then power up on full line voltage and check all the low voltage supplies are within spec. If they look ok then replace the fuse, move the vertical position controls to move the beam away from the visible area, intensity to minimum, and power up again on full supply voltage, ready to turn off quickly if anything is amiss.

The manual will have instructions for the setting of the storage controls for first time use.

Roger

scanned: 2A63 and 3A6 Instrument Reference Books

Kurt Rosenfeld
 

http://w140.com/tekwiki/images/a/a0/Tek_2a63_irb.pdf

http://w140.com/tek_3a6_irb.pdf

These PDFs were by made possible by Deane Kidd and his family and friends.

Re: 7000 series white plug-in connector

Jim Ford
 

Sorry about that, Mel.  Let me try filing down the epoxied bowed connector first. 
Thanks.
Jim


Sent from my Verizon, Samsung Galaxy smartphone

-------- Original message --------From: "Vintage Test via Groups.Io" <mel.purcell=icloud.com@groups.io> Date: 9/2/18 2:58 AM (GMT-08:00) To: TekScopes@groups.io Subject: Re: [TekScopes] 7000 series white plug-in connector

Jim,

I haven’t receive your address yet - do you still want this connector?

Cheers,
Mel
--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: Looking for ...

 

That would be fine. The only other part that is difficult to test for me is the tripler module with the hv lead. If you like you can include that also. Let me know the cost and method of payment you prefer.
Chris

On Sep 2, 2018, at 5:56 AM, Vintage Test via Groups.Io <mel.purcell=icloud.com@groups.io> wrote:


Hi Chris,,

As the HT module is quite a bit heavier than just the transformer, I propose removing the Tx and sending it on it’s own. The problem arises if it’s not just the transformer that’ll faulty . . .

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .


Re: Tek 466 analog storage

Paul B.
 

I'm perfectly sure it will cause "some oddities" - I don't dispute that. I'm just very wary about winding that variac up more when the display is already brighter than IMO it should be (although I have only my limited experience with Telequipment analog storage scopes to go by which may be of no help at all here).

Re: Tek 466 analog storage

Brendan
 

On Sun, Sep 2, 2018 at 06:15 AM, Paul B. wrote:


Hi all,

I'm really not very familiar at all with these exotic beasts. I'm powering up
a 466 (early version) slowly from a variac (they used a linear supply on
these) and at about one-half mains voltage I'm seeing a green glow on the
screen and that's all. I would guess by time I get to full mains this glow is
going to be *extremely* bright and that can't be right (the intensity control
doesn't make any difference, btw). What should I expect to see when powering
up a 466? It's been laying around for many years without being powered up at
all. I'm not giving it any input at this stage for obvs reasons; just want to
check it's not a junker before spending money on it.

cheers.
I would think that using a variac a1/2 voltage would cause some oddities. Other more experienced members will weigh in im sure.

Tek 466 analog storage

Paul B.
 

Hi all,

I'm really not very familiar at all with these exotic beasts. I'm powering up a 466 (early version) slowly from a variac (they used a linear supply on these) and at about one-half mains voltage I'm seeing a green glow on the screen and that's all. I would guess by time I get to full mains this glow is going to be *extremely* bright and that can't be right (the intensity control doesn't make any difference, btw). What should I expect to see when powering up a 466? It's been laying around for many years without being powered up at all. I'm not giving it any input at this stage for obvs reasons; just want to check it's not a junker before spending money on it.

cheers.

Re: TekScopes Policy Regarding Contacting Members Off-List

stefan_trethan
 

Just use a different email address if you do not want this one shared.
They are free and nobody else needs to be bothered to change anything
and you do not have to rely on anyone else to keep your privacy.
You can even set up forwarding so you don't need to check another inbox.

All this is ridiculous. It's a public forum.
Don't get me wrong, I support the GDPR in principle, but common sense
still applies.

ST

Re: 7000 series white plug-in connector

Colin Herbert
 

Hi Mel,
Yes, I did. I have been comparing it to what I already have and the documentation on the rigid and flexible extenders. It seems that it will do the job with a bit of fettling. My rigid extender is missing the plastic sides on the DUT-end connector and the tails that are soldered to the PCB are quite short. I think the sides are there to prevent damage. The longer tails on the connector that you sent me can, I think, be shortened.
I would like to reimburse you for the postage and pay you for the connector. Would £10 be acceptable? If you let me know your PayPal account, or BACS details, I will get the money to you asap.
Many Thanks, Colin.

-----Original Message-----
From: TekScopes@groups.io [mailto:TekScopes@groups.io] On Behalf Of Vintage Test via Groups.Io
Sent: 02 September 2018 11:00
To: TekScopes@groups.io
Subject: Re: [TekScopes] 7000 series white plug-in connector

Hi Colin,

Have you received the connector yet?

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: 7000 series white plug-in connector

Vintage Test
 

Hi Colin,

Have you received the connector yet?

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: 7000 series white plug-in connector

Vintage Test
 

Jim,

I haven’t receive your address yet - do you still want this connector?

Cheers,
Mel
--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: Looking for ...

Vintage Test
 

Hi Chris,,

As the HT module is quite a bit heavier than just the transformer, I propose removing the Tx and sending it on it’s own. The problem arises if it’s not just the transformer that’ll faulty . . .

Cheers,
Mel

--
you can never have enough oscilloscopes, DMMs, valve testers or soldering irons . . .

Re: TekScopes Policy Regarding Contacting Members Off-List

EJP
 

After various private exchanges, it seems I am describing the way it should work, rather than the way it does work. In a properly implemented system of this kind, the emails should come as 'from groups.io on behalf of Esmond Pitt' without my own email address being visible. See for example eBay grrr.

This is a matter not for group members to address via a policy, but for groups.io to implement via their mechanisms, with some urgency. It's not hard. They are leaking confidential information all over the place, including with this post

EJP

Re: TekScopes Policy Regarding Contacting Members Off-List

John Griessen
 

On 09/01/2018 11:34 PM, EJP wrote:
So for example nobody could use them to contact me, as I don't.
I see your email as part of the list server email I received.

Is there some way you can be anonymous? With BCC?