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Re: Watch for new members who are here under false pretenses
Thank you for all you do!
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Most of us do not know exactly, since only few of us know how much work you do every day! Have a great weekend and stay safe all of you out there. Tony On Sat, Jun 6, 2020 at 12:34 PM bill K7WXW <K7WXW@...> wrote:
This is why all of the groups I manage are set up so that the first two or |
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Re: Never to be used GPIB option and power consumption and heat.
Thank you very much for explaining it to me!
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Somewhere I heard that it was possible, but now it is clear to me, thanks to you Siggi. Have a great weekend! Stay safe all of you. On Sat, Jun 6, 2020 at 12:35 PM Siggi <siggi@...> wrote:
Hey Tony, |
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Re: Never to be used GPIB option and power consumption and heat.
Hey Tony,
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The 2465 is an analog scope, and the GPIB is only good for changing or reading back the settings on the scope. The scope itself has no idea what's displayed on the CRT, so you wouldn't be able to e.g. read back the displayed waveform to a computer. For that you'd need a digitizing scope of some description. Siggi On Sat, Jun 6, 2020 at 12:39 PM Tony Fleming <czecht@...> wrote:
I have this option on my 2465 - 300 MHZ version and I purchased the cable. |
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Re: Watch for new members who are here under false pretenses
This is why all of the groups I manage are set up so that the first two or three new member messages are moderated. On most of them, I also send a message to anyone applying to join, asking them about their interest in the group. People looking for easy ways to post spam almost always move on. For me, the additional work is worth the result: spam free lists.
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Re: Watch for new members who are here under false pretenses
Hi Roy,
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Did you forget to include what you wanted me to know? Dennis -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Roy Thistle Sent: Saturday, June 06, 2020 9:58 AM To: [email protected] Subject: Re: [TekScopes] Watch for new members who are here under false pretenses On Sat, Jun 6, 2020 at 09:56 AM, Dennis Tillman W7pF wrote:
-- Dennis Tillman W7pF TekScopes Moderator |
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Re: Tek 4041 GPIB Controller
Thank you for your reply.
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Is there an external printer I can connect to my 2465? Thanks. Tony On Sat, Jun 6, 2020 at 12:10 PM Monty McGraw <mmcgraw74@...> wrote:
I decided to take a look at why my 4041 thermal printer was printing |
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Re: In Defense of the 7A19
Hi Ernesto,
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Thanks for that link to the Triggering Fundamentals Application Note on the Tektronix web site. I have one disagreement with this AppNote after glancing through it. This is the most advanced article on triggering I have ever seen. There is nothing fundamental about the triggering capability of the scopes in this AppNote. I think it will take years to fully understand how all of these trigger conditions interact before you can take advantage of all of this new capability. A better name for the App Note would be Advanced Triggering not Fundamental Triggering. Dennis Tillman W7pF -----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Ernesto Sent: Saturday, June 06, 2020 9:24 AM To: [email protected] Subject: Re: [TekScopes] In Defense of the 7A19 On Mon, Jun 1, 2020 at 08:21 AM, Dave Daniel wrote: Hi Dave, I found this book you recommended under the "Concept Series" in tekwiki. It is very helpful and easy to read. Another article, a little more advanced, is on www.tek.com. It goes beyond all one may want to know on the subject, but I will find time to read it. Ernesto -- Dennis Tillman W7pF TekScopes Moderator |
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Re: Never to be used GPIB option and power consumption and heat.
Percentage-wise, the GPIB power is probably no big deal. I don't know how the GPIB option is connected internally, but if it's say, via a ribbon cable, you may be able to just unplug it and secure it so it can't short to anything. Then make sure the system starts up and runs properly without it - it may cause error reports on POST, for instance, if it expects to find it.
If the GPIB module is hard-plugged directly into a port, and requires physical removal to disconnect, then you'll have to worry about plugging the empty cabinet hole, and the possibility of eventually losing the GPIB parts - this tends to happen when things are separated. The simplest thing is to just leave it be. Ed |
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Re: Watch for new members who are here under false pretenses
THANK YOU FOR ALL YOU DO!!!
On Sat, Jun 6, 2020 at 11:56 AM Dennis Tillman W7pF <dennis@...> wrote: A few days ago I approved someone who wanted to join TekScopes. |
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Re: Tek 4041 GPIB Controller
I decided to take a look at why my 4041 thermal printer was printing unrecognizable characters. I was able to fix it by removing the timing disk cover and cleaning the contacts and timing disk with 90% isopropyl alcohol. I believe the 40 year old grease on the timing disk had hardened and was keeping the contacts from making proper contact with the timing disk. You can see description and photos of the repair on my post on vcfed: |
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Watch for new members who are here under false pretenses
A few days ago I approved someone who wanted to join TekScopes.
Fortunately one of our members alerted me that he recognized the email ID. The person (or group) using that email ID was joining other groups to post ads for face masks. Groups are easy prey for scams like this so this is going to happen again. Now that I know about this I will be watching for others with the same intent. You can help too. Let me know if anyone in other groups has attempted to do this. Send me their name or email address via the Group Owner link at the bottom of this post. Dennis Tillman W7pF |
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Re: Never to be used GPIB option and power consumption and heat.
I have this option on my 2465 - 300 MHZ version and I purchased the cable.
I have plans to get it to work with a computer and I'm looking for someone who has done this, so I don't need to reinvent something that is done already! ha ha ha Can someone point me to the resources I can use? Is there some modern PC connection available? Why would you like to remove it? It isn't hurting anything and the power supply creates almost the same heat as if you didn't have it, so you wouldn't save any $$, I think. Thank you all! Stay safe and have a great weekend! Tony On Sat, Jun 6, 2020 at 11:24 AM Lawrance A. Schneider < llaassllaaass@...> wrote: My 2465BDM has a GPIB option. I'll never use it; all my other instruments |
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Re: DM502 with problems
Colin,
Glad to hear it is working OK, if there is no need to clean the cam switches then don't rush into it, there is advice around that says energetic cleaning with the wrong type of paper can remove the gold plating. There are 40 odd segments to the cam switch so it could be a tedious job anyway! Regards, Roger |
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Never to be used GPIB option and power consumption and heat.
My 2465BDM has a GPIB option. I'll never use it; all my other instruments either have no external connection to the world (my computer) or use ethernet.
Relative to heat and energy consumption would it be advantageous to remove the card? Thanks, larry |
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Re: In Defense of the 7A19
On Mon, Jun 1, 2020 at 08:21 AM, Dave Daniel wrote:
Hi Dave, I found this book you recommended under the "Concept Series" in tekwiki. It is very helpful and easy to read. Another article, a little more advanced, is on www.tek.com. It goes beyond all one may want to know on the subject, but I will find time to read it. Ernesto |
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Re: Oscilloscope Sales
On Fri, Jun 5, 2020 at 04:51 PM, Dennis Tillman W7pF wrote:
Hi Dennis, Hi All interested in TekScopes and Groups.io The email truncation, in a post, is probably, but not necessarily, the Groups.io settings for TekScopes. You could see the following, 2 links (from the Groups.io Managers Forum, and the Groups.io Help ) /g/GroupManagersForum/message/19180?p=,,,20,0,0,0::Created,,email+address+truncated,20,2,0,34606469 /helpcenter/ownersmanual/1/customizing-group-settings/privacy-settings from the above link entitled, "Email Address Visibility in Archive" This setting controls whether full email addresses are visible in the message archive on the group¡¯s website. Select the option you want to apply: Mask email addresses in the web archive Show email addresses in the web archive Note: When an archive is publicly viewable, email addresses are always hidden from nonmembers who view the archive. |
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Re: Fixing a Tektronix 2246
While you are inside the scope, or at least put it on your to do list (along with a full recap of the power supply as well) might want to visually check all the MB2501 fast recovery rectifier diodes (17 in total) on the power supply board, and replace the ones with ZM or ZS marked on them as it is a well known problem that they get leaky over time and will cause problems. This is a very common failure scenario for the 2245/6/7A/52 scopes. I replaced them all in my 2247A with MUR160 diodes from Mouser (PN 821-MUR160).
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Re: 2445 woes
Very good thread suggestion on 2465B I didn't know they are so similar to
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my late 2445B 200MHz version On Sat, 6 Jun 2020, 16:43 , <tekscopegroup@...> wrote:
On Fri, Jun 5, 2020 at 12:55 PM, Ondrej Pavelka wrote:P.S. I found 3 leaky surface mount electrolytic caps on the board Ithink it'sreferred to as a A board? I will change those to prevent furthercorrosionspread but what are they in charge of ? Could these be the reason for theIt is actually 4 electrolytic caps in total on the A5 board that cause the |
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Re: 2445 woes
On 06/06/20 15:42, tekscopegroup@... wrote:
Regards your earlier question about saving the cal data of your NVRAM, it needs to be carefully desoldered from the board and then read with a programmer (I used the GQ-4X4, but there are other options as well). Once the data is read and saved it needs to be programmed into a fresh NVRAM chip (get it from Mouser, Digikey, etc. NOT from ebay). Then solder a low profile socket onto the board, and insert your newly programmed NVRAM.One easy trick that may or may not be helpful is to take a video of the screen as you use the exerciser routine to step through all the 256 visible values. If you lose the calibration values in the current NVRAM then it might be possible to copy the values into a new NVRAM, somehow or other. Whether or not the calibration values are still valid or a recal is necessary, is a separate question |
bill K7WXW
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