Keyboard Shortcuts
ctrl + shift + ? :
Show all keyboard shortcuts
ctrl + g :
Navigate to a group
ctrl + shift + f :
Find
ctrl + / :
Quick actions
esc to dismiss
Likes
- TekScopes
- Messages
Search
|
Re: Tunnel Diode for 1S1
zenith5106
--- In TekScopes@..., "Gregor Lasser" <e0125809@s...>
wrote: Hello again!on ebay but these are NOT "TD252 (152-0214-00)" !!a lot of different tunnel diodes in there!)0125-00 " diodes, or where to find the original ones?In the RPR (Replaceable Parts Records) 152-0125-00 is listed as a direct replacement for 152-0214-00 in the 1S1 if it is D304. For D345 152-0093-00 should be used. /Zenith, Sweden |
|
Re: Tunnel Diode for 1S1
--- In TekScopes@..., "Gregor Lasser" <e0125809@s...> wrote:
Hello again!ebay but these are NOT "TD252 (152-0214-00)" !!lot of different tunnel diodes in there!)"152-0125-00 " diodes, or where to find the original ones?It's that little black drop with a tiny red dot on it, isn't it? That TD252 is a relatively *fast* TD, Rise Time 320ps. The Valley Point Terminal Capacitance is typicaly 2.8pF, Max. 6pF. The Capacitance of the STD704 (152-125-00/01) is 18pF max, (Spec taken from "Tek Common Design Parts Catalog May 1988" unfortunately there are no data for their risetime, but i suspect it is about three times slower... because the risetime calculation for germanium td's is tr~ C/(2*Ip) (Formula taken from RCA Tunnel Diode Manual (TD-30), Page 36) So the trigger or other critical timings inside the circuit maybe will not work properly, at least at higher triggerrates... I coud help with one TD252, please mail me under dj0ud at web dot de Jorgen |
|
Re: Tunnel Diode for 1S1
Craig Sawyers
Hi Gregor
Thank you for your quick reply. I've also seen this Tunnel Diodes on ebayWell - what are you going to do? I think you'll find that the TD252 is unobtainium. Since buying Stan's 4.7mA tunnel diodes, which don't cost a king's ransom, is better than nothing why not just give it a try? I live in fear of my 1S2 developing a problem - that has 12 tunnel and back diodes in it, with lots of obscure currents, ranging from 1mA to 100mA and just about everything in between. Craig |
|
Post not working
reesaart2004
Who is the Owner/Moderator of this list?
I've noticed that my new posts (since a week or so) have not been published on the list. On the other way receiving posts works ok. Actually I'm posting from the web pages of Yahoo... I hope at least this message appears on the list. Regards. Andreas Troschka. |
|
Tunnel Diode for 1S1
Gregor Lasser
Hello again!
toggle quoted message
Show quoted text
Thank you for your quick reply. I've also seen this Tunnel Diodes on ebay but these are NOT "TD252 (152-0214-00)" !! The ones that are sold on ebay are also used in the 1S1 (there are a lot of different tunnel diodes in there!) Does anybody know if you can substitute the TD252s with these "152-0125-00 " diodes, or where to find the original ones? Thank you all in advance Gregor Lasser -----Ursprungliche Nachricht----- Von: Darrin Conniff [mailto:djconniff@...] Gesendet: Dienstag, 02. Marz 2004 05:06 An: Greyhawk Cc: TekScopes@... Betreff: Re: [TekScopes] Tunnel Diode for 1S1 Hello Greyhawk, That auction is being conducted by Stan & Patricia Griffiths, w7ni, so you know it is quality product. Good luck. Dsrrin Greyhawk <greyhawkeng@...> wrote: Some FYI... The Auction On Tunnel Diodes Is Here... Greyhawk ----- Original Message -----
From: Gregor Lasser To: TekScopes@... Sent: Monday, March 01, 2004 12:20 Subject: [TekScopes] Tunnel Diode for 1S1 Hello! I'm new to the list and I have quite a trouble with a 1S1 Sampling plug-in I bought at ebay! While I was cleaning the plug-in I found a Tunnel Diode with one of its "legs" broken off. I unsoldered it just to see that the second leg was also defective. Does anyone know where to find this tunnel diode? It is D304 in the 1S1, Manual says: D304 152-0214-00 TD252 4,7mA . Is there any source for this diode, or is there a possible substitution? Thank you all in advance Gregor Lasser Yahoo! Groups Sponsor ADVERTISEMENT ---------------------------------------------------------------------------- -- Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Yahoo! Groups Links To visit your group on the web, go to: To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. Yahoo! Groups Links |
|
Re: 7S/7T Sampling System
Craig Sawyers
Have you considered a 7S14 instead of a 7T11/7S11/Sx. The 7S14 is oftenI don't think that necessarily helps - the full cal procedure for the test fixures calls for a 7S12; a pulse generator (S52) is used to supply a clean and fast pulse and the two sampling heads look at the + and - differential signals coming out. The ampifier compensation is then tweaked to minimise aberrations. I guess that a 7S14 could be used with a seperate 100ps pulser, but that would only do for the -00 suffix fixture. The -01 procedure calls for S2's with 4.6GHz bandwidth. I don't have the procedure for the -02. Craig |
|
Re: I couldn't stop the tears...
jeans
looks like evil was trying to jump the Grand Canyon when it fell out. Ouch!!
toggle quoted message
Show quoted text
There does seem to be some good parts though. If anyone buys it can you let us know if the CRT survived, the shield is battered so it's unlikely but maybe...? Don Black. Darrin Conniff wrote: Hello all (sniffle). |
|
Re: 7S/7T Sampling System
Gottfried Ira
Is there a writeup or a brief overview describing the
toggle quoted message
Show quoted text
differences between the A and non-A versions? Thanks, Gottfried Ira Dennis Tillman wrote: Hi Dan, |
|
7934
Craig Sawyers
Just spotted 3801330192 on eBay. This seems to be the fairly rare 7934
storage scope, but it comes with a 7T11/7S11/S4 sampling combo (and 7B80/7A18). I have no idea whether the sampler works. They guy shows a fairly low contrast trace, but there is no information about what mode he had used to record it - I suspect one of the bistable modes, but the seller ought to be asked. Anyway, he wants $400 on buy-it-now and a $275 starting bid. Craig |
|
Re: Tunnel Diode for 1S1
Darrin Conniff
Hello Greyhawk,
toggle quoted message
Show quoted text
That auction is being conducted by Stan & Patricia Griffiths, w7ni, so you know it is quality product. Good luck. Dsrrin Greyhawk <greyhawkeng@...> wrote: Some FYI... The Auction On Tunnel Diodes Is Here... Greyhawk ----- Original Message -----
From: Gregor Lasser To: TekScopes@... Sent: Monday, March 01, 2004 12:20 Subject: [TekScopes] Tunnel Diode for 1S1 Hello! I'm new to the list and I have quite a trouble with a 1S1 Sampling plug-in I bought at ebay! While I was cleaning the plug-in I found a Tunnel Diode with one of its "legs" broken off. I unsoldered it just to see that the second leg was also defective. Does anyone know where to find this tunnel diode? It is D304 in the 1S1, Manual says: D304 152-0214-00 TD252 4,7mA . Is there any source for this diode, or is there a possible substitution? Thank you all in advance Gregor Lasser Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. --------------------------------- Yahoo! Groups Links To visit your group on the web, go to: To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
|
I need a function generator.
Phil Townsend
Newbie to your list...Hi all.
Im new the the audio amp building hobby. Ive built 4 or 5 small tube amps. They all worked well. More or less. So I bought a cheep T922 scope. Im learning to use it. (sorta of) But I think I need a function generator... I paid 50 bucks for the scope. What should I buy ...ideas etc. Thank you in advance. Phil Santa Fe NM Not to far from the "Black Hole" in Los Alamos. Visit Eds site sometime |
|
Re: Tunnel Diode for 1S1
Greyhawk
Some FYI... The Auction On Tunnel Diodes Is Here...
toggle quoted message
Show quoted text
Greyhawk ----- Original Message -----
From: Gregor Lasser To: TekScopes@... Sent: Monday, March 01, 2004 12:20 Subject: [TekScopes] Tunnel Diode for 1S1 Hello! I'm new to the list and I have quite a trouble with a 1S1 Sampling plug-in I bought at ebay! While I was cleaning the plug-in I found a Tunnel Diode with one of its "legs" broken off. I unsoldered it just to see that the second leg was also defective. Does anyone know where to find this tunnel diode? It is D304 in the 1S1, Manual says: D304 152-0214-00 TD252 4,7mA . Is there any source for this diode, or is there a possible substitution? Thank you all in advance Gregor Lasser Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
|
Re: Tunnel Diode for 1S1
Greyhawk
Two Sellers Had Sets Of 2 (New) On Ebay. I Don't Know If They Sold, Or If The Auction Ended.
toggle quoted message
Show quoted text
Greyhawk ----- Original Message -----
From: Gregor Lasser To: TekScopes@... Sent: Monday, March 01, 2004 12:20 Subject: [TekScopes] Tunnel Diode for 1S1 Hello! I'm new to the list and I have quite a trouble with a 1S1 Sampling plug-in I bought at ebay! While I was cleaning the plug-in I found a Tunnel Diode with one of its "legs" broken off. I unsoldered it just to see that the second leg was also defective. Does anyone know where to find this tunnel diode? It is D304 in the 1S1, Manual says: D304 152-0214-00 TD252 4,7mA . Is there any source for this diode, or is there a possible substitution? Thank you all in advance Gregor Lasser Yahoo! Groups Sponsor ADVERTISEMENT ------------------------------------------------------------------------------ Yahoo! Groups Links a.. To visit your group on the web, go to: b.. To unsubscribe from this group, send an email to: TekScopes-unsubscribe@... c.. Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service. |
|
Re: 7S/7T Sampling System
Dennis Tillman
Hi Dan,
toggle quoted message
Show quoted text
Which 067-0587 are you talking about? the -02 is a 1GHz unit but the -01 is slower (500 Mhz I think). I think the -00 is slower still. I ask becaue that will determine how fast the sampling heads need to be. A 7T11A is much rarer and more expensive than a 7T11. Unless you need the 7T11A version (which is what a 7854 scope needs) there is nothing wrong with the 7T11. You will need a sampling head to go in the 7S11 such as an S1/S2/S3/S3A/S4. Note the S1, S3, and S3A only go to 1GHz. Have you considered a 7S14 instead of a 7T11/7S11/Sx. The 7S14 is often overlooked because it is one of the original 7000 plugins. The 7S14 is a 1 GHz Dual Trace Sampling plugin with the sampling heads and a delayed timebase all built in to a very easy to use self contained unit. It is quite nice. They can be had cheaply. It occupies two slots. So on a 4 slot mainframe you can still use a real time amplifier and timebase at the same time. Dennis -----Original Message-----
From: Dan Tulloss [mailto:dtulloss@...] Sent: Monday, March 01, 2004 3:22 PM To: 'TekScopes@...' Subject: [TekScopes] 7S/7T Sampling System Does anybody have a 7T11A or plain and a 7S11A or plain sampling system that is in good condition. Need a good one to do some 067-0587-XX's. Not being re-sold...for my use...saw that being asked this morning. Thanks, Dan Tulloss Senior Metrologist National Test Equipment, Inc. 760-639-1700 760-639-1799 Fax www.nationaltestequipment.com |
|
Re: I couldn't stop the tears...
Hi,
toggle quoted message
Show quoted text
If you get past the picture and read the small print you will find: "Everything packaged safely and securely using good quality shipping materials". Bid with confidence knowing that it will not be in any worse condition when you get it ;-) John ---------- Original Message ----------------------------------
From: Darrin Conniff <djconniff@...> Reply-To: djconniff@... Date: Mon, 1 Mar 2004 12:58:23 -0800 (PST) Hello all (sniffle). |
|
7S/7T Sampling System
Does anybody have a 7T11A or plain and a 7S11A or plain sampling system that
is in good condition. Need a good one to do some 067-0587-XX's. Not being re-sold...for my use...saw that being asked this morning. Thanks, Dan Tulloss Senior Metrologist National Test Equipment, Inc. 760-639-1700 760-639-1799 Fax www.nationaltestequipment.com |
|
Another horror story
Denis Cobley
Had a job about 10 years ago which was much worse.
We were sent a 492 & TM5006 mainframe full of plug-in's. It have been in a service car - a station wagon (estate in the UK) and the Tech had run into a tree. The 2 items had become missiles and punched through the tech. The units were full of bits of meat and congealed blood but the company wanted to recover the instruments. I had the most unpleasant job of stripping and cleaning every part of the units and getting them operational. The smell was not good - not something you wanted to be doing just after lunch. Both instruments are back in service and looking for their next victim. There is a lesson here for those who do not secure heavy equipment in cars or vans. I also had one just like the other one - tailgate flew open around a corner and the scope made a break for it! Had a unit sent back to Tek in Beaverton once - run over by a 747 front wheel - ended up about 1" thick - Tek said it was my problem as once it left them I carried the risk. Of course the carrier said it was also not their problem either so we had to carry the can on that one with the customer. Strange things happen in this world. Regards Denis Cobley |
to navigate to use esc to dismiss