good point.
i'm glad dennis is doing ok...here are some recent anecdotes to lighten the thread:
years ago i was communicating with someone 3000 miles away and he sent me an email that just stopped mid sentence. i replied and got no answer.
he was advanced in years (a common condition here) and i had visions of him having an attack while composing and hitting "send" as a cry for help. i only knew him virtually so i had to hunt down the details and called the police for a wellness check. they were not very helpful in florida and were taking their time. i eventually got a reply from him (he accidentally hit "send" prematurely) hours later so i called police and called off wellness check.
it is an option to keep in mind though.
another: a neighbor called the police for a wellness check on me when i did not put out my garbage a day earlier. another neighbor saw cops looking in windows and
told them i was unreachable at the coast for a few days. i have the calling neighbor on my whereabouts update list now :-)
he did have some reason to be concerned, however. just previously i confronted a burglar and knives and gunfire ensued. he is currently in prison. so much for lightening it up. :-(
|
Nicolas,
Yes, you will need to unsolder the leads of the parts. Only one end is necessary while bending the part up. That way you can easily tell where it goes back. The hardware to remove the cans will be easily reached. If you want to replace any of the resistors while one end is up, that is up to you.
Mark
|
You could call the local police, and request a wellness check. On Sat, Jul 10, 2021 at 3:33 PM pdxareaid via groups.io <mousterious= [email protected]> wrote: a google search for him in bellevue will yield lots of info including his
call sign, home address, landline, email adr etc. even neighbors and
relatives.
the nuber link had lots of info for free. i don't know him (and he had
email problems in the past) so if someone can use this info to check on
him, please do.
|
Re: RSA 3408 A Real time spectrum analyser
Thank you all for the valuable insights. I am confirming it for a around ?1.5k
|
Hello all I have started giving my old 531A a much needed complete overhaul. I created an album and posted a few photos here /g/TekScopes/album?id=265938Now I have a quick question : I've replaced most electrolytic caps but I still have 3 that are not easily accessible (see 2nd to last picture in the album. They are called C507, C603 and C605). How would you remove them ? Do I have to unsolder the components on the ceramic strips ? (I don't want to, but if I have to...) Nicolas
|
Re: FTAGH: Free to a good home: 465/475 scopes
I collect older Tube radios. The absolute best (and worst) packing jobs I have seen are in the packing of these heavy boat-anchors. The best packaging was for an absolutely pristine National HRO-5 receiver. The guy who sold it to me (who was selling it on behalf of a silent key's estate sale) did so under the priviso that the packaging would cost me $100 in addition to the cost of the receiver. One of the best $100 I ever spent. Everything was wrapped excessively, protected and came through with nary a scratch. And then there was the guy who couldn't even pack a ceramic wafer switch properly and it broke in the shipping. I still shake my head about that.
Thank You, Gordon
toggle quoted message
Show quoted text
On Sun, Jul 11, 2021 at 05:13 AM, JJ wrote: Going back some 15 yrs, my 576 was delivered from a surplus auction -
double wrapped in contractor's plastic bags, suspended inside a box with
foam spray in insulation, that box suspended in another much large box
suspended in foam insulation. It took me about an hour to free it - arrived
in perfect condition!
John
|
Or he may rather tell it himself when he returns.
Vince.
toggle quoted message
Show quoted text
On 07/11/2021 09:25 AM, n4buq wrote: I may have inferred too much, but from the sound of Chris' email, Dennis may not want to broadcast that much about himself.
Thanks,
Barry - N4BUQ
----- Original Message -----
From: "Colin Herbert via groups.io" <colingherbert@...>
To: [email protected]
Sent: Sunday, July 11, 2021 3:19:33 AM
Subject: Re: [TekScopes] Dennis Tillman
So, what is the reason why he has been incommunicado? Just curious and
concerned.
Colin.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Chris van
Lint
Sent: 11 July 2021 02:53
To: [email protected]
Subject: Re: [TekScopes] Dennis Tillman
I have just had a looong conversation with Dennis. The time in Bellevue
is 7 hours ahead of Brisbane AUS - BUT the *previous day*. Dennis is OK
and he hopes to be back in the saddle within the not too distant future.
Chris
On 10/07/2021 15:27, Dave Casey wrote:
I have a cell number for Dennis from a couple years ago. I could give him a
call if anyone who knows him better hasn't already.
Dave Casey
On Fri, Jul 9, 2021 at 8:25 PM Dave Daniel <kc0wjn@...> wrote:
Is there anyone who lives close by who can check on him?
DaveD
On Jul 9, 2021, at 21:18, Phillip Potter <p.potter@...> wrote:
?I posted on Tubetesters and haven¡¯t heard from him there, either!
Hoping all is ok.
Phil
On Jul 9, 2021, at 6:28 PM, Vince Vielhaber <vev@...> wrote:
No, he hasn't responded to me either. I looked and the last time he posted to the list (that I can see) was 5/31.
Vince.
On 07/09/2021 07:56 PM, Raymond Domp Frank wrote:
On Tue, Jul 6, 2021 at 06:23 PM, Raymond Domp Frank wrote:
A few days ago, I sent a PM to Dennis, because I hadn't seen a
message from
him for a while.
So far, no response.
Does anyone know whether his area is perhaps still off-line because
of the
heatwave?
No response has been posted on this message.
Anyone?
Raymond
--
Michigan VHF Corporation -- nobucks dot net
K8ZW -
--
Michigan VHF Corporation -- nobucks dot net
K8ZW -
|
Re: Binding Post Thumb/Head Nut Replacements
Same problem here in Germany. McMaster Carr does no longer serve private m customers. Business customers might be approved if they meet certain requirements.
Fortunately Digikey and Mouser still serve private customers abroad and even offer free UPS shipping for an order value of US $60 and up.
vy 73 Heinz DH2FA
Von meinem iPhone gesendet
|
Re: Binding Post Thumb/Head Nut Replacements
Keith,
Yes, I bought a set of those; they are much too long, and the outer diameter is too large. They FEEL really nice, though: sold, heavy, and the diamond knurling is very satisfying.
¡ª Jeff Dutky
|
Re: Binding Post Thumb/Head Nut Replacements
Hi Jeff,
Did you see these, on fleabay?
Price seems ok at $1.50 each. They are stainless steel. Looks like this seller has plenty.
|
Re: Tek 154-0235-00, where does it belong to?
... and I am not sure if I should get hold of that offered one over here in Europe although I do not have a scope that it would fit in. I know NOS crts are not going to be offered in increasing quantities but at the other hand I have already got quite a number of tubes that I do not need.
Joe
|
I may have inferred too much, but from the sound of Chris' email, Dennis may not want to broadcast that much about himself.
Thanks,
Barry - N4BUQ
toggle quoted message
Show quoted text
----- Original Message ----- From: "Colin Herbert via groups.io" <colingherbert@...>
To: [email protected]
Sent: Sunday, July 11, 2021 3:19:33 AM
Subject: Re: [TekScopes] Dennis Tillman
So, what is the reason why he has been incommunicado? Just curious and
concerned.
Colin.
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Chris van
Lint
Sent: 11 July 2021 02:53
To: [email protected]
Subject: Re: [TekScopes] Dennis Tillman
I have just had a looong conversation with Dennis. The time in Bellevue
is 7 hours ahead of Brisbane AUS - BUT the *previous day*. Dennis is OK
and he hopes to be back in the saddle within the not too distant future.
Chris
On 10/07/2021 15:27, Dave Casey wrote:
I have a cell number for Dennis from a couple years ago. I could give him a
call if anyone who knows him better hasn't already.
Dave Casey
On Fri, Jul 9, 2021 at 8:25 PM Dave Daniel <kc0wjn@...> wrote:
Is there anyone who lives close by who can check on him?
DaveD
On Jul 9, 2021, at 21:18, Phillip Potter <p.potter@...> wrote:
?I posted on Tubetesters and haven¡¯t heard from him there, either!
Hoping all is ok.
Phil
On Jul 9, 2021, at 6:28 PM, Vince Vielhaber <vev@...> wrote:
No, he hasn't responded to me either. I looked and the last time he posted to the list (that I can see) was 5/31.
Vince.
On 07/09/2021 07:56 PM, Raymond Domp Frank wrote:
On Tue, Jul 6, 2021 at 06:23 PM, Raymond Domp Frank wrote:
A few days ago, I sent a PM to Dennis, because I hadn't seen a
message from
him for a while.
So far, no response.
Does anyone know whether his area is perhaps still off-line because
of the
heatwave?
No response has been posted on this message.
Anyone?
Raymond
--
Michigan VHF Corporation -- nobucks dot net
K8ZW -
|
Re: FTAGH: Free to a good home: 465/475 scopes
Going back some 15 yrs, my 576 was delivered from a surplus auction -
double wrapped in contractor's plastic bags, suspended inside a box with
foam spray in insulation, that box suspended in another much large box
suspended in foam insulation. It took me about an hour to free it - arrived
in perfect condition!
John
|
So, what is the reason why he has been incommunicado? Just curious and concerned.
Colin.
toggle quoted message
Show quoted text
-----Original Message----- From: [email protected] [mailto: [email protected]] On Behalf Of Chris van Lint Sent: 11 July 2021 02:53 To: [email protected]Subject: Re: [TekScopes] Dennis Tillman I have just had a looong conversation with Dennis. The time in Bellevue is 7 hours ahead of Brisbane AUS - BUT the *previous day*. Dennis is OK and he hopes to be back in the saddle within the not too distant future. Chris On 10/07/2021 15:27, Dave Casey wrote: I have a cell number for Dennis from a couple years ago. I could give him a
call if anyone who knows him better hasn't already.
Dave Casey
On Fri, Jul 9, 2021 at 8:25 PM Dave Daniel <kc0wjn@...> wrote:
Is there anyone who lives close by who can check on him?
DaveD
On Jul 9, 2021, at 21:18, Phillip Potter <p.potter@...> wrote:
?I posted on Tubetesters and haven¡¯t heard from him there, either!
Hoping all is ok.
Phil
On Jul 9, 2021, at 6:28 PM, Vince Vielhaber <vev@...> wrote:
No, he hasn't responded to me either. I looked and the last time he posted to the list (that I can see) was 5/31.
Vince.
On 07/09/2021 07:56 PM, Raymond Domp Frank wrote:
On Tue, Jul 6, 2021 at 06:23 PM, Raymond Domp Frank wrote:
A few days ago, I sent a PM to Dennis, because I hadn't seen a
message from
him for a while.
So far, no response.
Does anyone know whether his area is perhaps still off-line because
of the
heatwave?
No response has been posted on this message.
Anyone?
Raymond
--
Michigan VHF Corporation -- nobucks dot net
K8ZW -
|
Re: Fixing a 7603 Power Supply
I have added a photo album with images of the dead 7B53A and my experiments illuminating the pushbuttons using a laser pointer: /g/TekScopes/album?id=265929
|
Re: Fixing a 7603 Power Supply
This is somewhat off-topic, but I'm setting out to make one working 7B53A from two damaged and dead ones. This actually shouldn't be too difficult as the damaged one just needs to have it's TIME/DIV switch assembly, and one slide switch replaced, and those don't seem to be damaged on the poor, corroded 7B53A that I'm already taking apart.
While taking the corroded 7B53A apart, however, I noticed that the push buttons (other than the single-sweep reset button) don't seem to have any illuminating lamps. They do, however, seem to be build to have lamps, both because the back end of the plunger is beveled to redirect light along the clear plunger, and because the button housing seems to have mount points for a light cage/baffle.
I've experimented with shining a laser pointer down the back of the back of the switch assembly, and the engaged pushbutton lights up quite beautifully. I expect that I could wire up and mount some LEDs at the top or bottom back of the switch assembly to illuminate the engaged buttons, and that half a dozen diodes will not be a significant current drain on the +5V rail, at least not compared to incandescent lamps.
Without the cage/baffle to keep the light from spilling all over the interior of the plug-in the transparent skirt on the TIME/DIV knob also illuminates in an especially subtle and pleasing way.
One 5mm LED is able to illuminate all four buttons in a column very nicely.
-- Jeff Dutky
|
Re: Binding Post Thumb/Head Nut Replacements
Shaun,
I'm not too concerned about the color, I just wanted something that was close to the right length and outer diameter, and that had some kind of knurling. The nuts that I ordered are black oxide, which is nice and understated on the instruments, but is still quite different than the original thumb nuts. I see on Amazon that similar "internal wrenching allen nuts" are available in stainless steel finish, which would be a much closer match to the original, but I haven't found 1/4-28 in stainless steel finish, and the prices on Amazon are absurd (or maybe that's just the quantities that are absurd).
I fully expect the brass inserts to work perfectly, but they will certainly stand out with respect to the rest of the instrument face. I've seen some "restored" oscilloscopes on-line where the BNC connectors have been replaced with gold plated ones. The brass inserts will look almost as silly.
I am frustrated, however, that I was not able to find exact replacements for the Tek binding post nuts. I found lots of diamond knurled thumb nuts, but most were too long, and/or their outer diameter was much too large. Most were also made of aluminum, which I am scared to have in direct contact with the steel binding post (maybe that fear is misplaced? The binding post is already in direct contact with the frame and face plate, both of which are make of aluminum in most, if not all Tek instruments).
I purchased a handful of NOS Tek binding posts with thumb nuts, of the smaller size for TM500 plug-ins, on eBay, and those should be enough for my use, but I haven't found any of the 3/8 inch length nuts commonly used on 500-series scopes and plug-ins.
-- Jeff Dutky
|
Re: FTAGH: Free to a good home: 465/475 scopes
I know that we are way off topic, but since we are talking about previous shipping experiences, FedEx is my worst one. Any Tektronix scope that was delivered via FedEx has been totally destroyed. The last scope delivered by FedEx was a 531A, and the CRT was in tiny pieces and the type CA plug-in was destroyed also. My camera in front of the house caught everything, the driver was shoved the package out of the back of the truck and the camera picked up the implosion of the CRT. The driver actually left the package on the sidewalk in front of my home. I have tried to bring this scope back to life but the entire scope is twisted in a very subtle way that it can't be used. However, in regards to UPS, I have yet to receive a Tektronix scope severely damaged. My 2 561A's, 564, 565, 503 and 504 were delivered by UPS with no issues. I still am upset about my 531A, so I will have to fix up my 533A which is going to be a big job. In either case, it depends on who cares about their jobs or not. Just my 2 cents.
Brenda
|
Chris,
This is excellent news. This whole thread was making my anxiety go off the charts. I'm very relieved to hear that Dennis is okay.
-- Jeff Dutky
|
Re: Binding Post Thumb/Head Nut Replacements
Unfortunately, McMaster Carr chooses not to do business with individuals in Canada so we northerners must look elsewhere. Interestingly enough, I ordered from them when working for a large company in Canada, but cannot do so now having left the organization.
That said, our American friends can certainly use McMaster Carr.
Shaun M
|
Michael A. Terrell
Anil Nediyara
Joe
Shaun M