Has anyone come across a source of probe/manual bags - or a workable
alternative ??
Dave
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I have acquired a Tek 2225 as a 50MHz analogue alternative to my TDS744A
but before I powered it on I took the case off to make sure nothing had
shaken loose in transit (I make that a policy for mains powered stuff).
Everything was OK but I did find a loose screw rolling around in the PSU
area !!!
I am very glad I gave the thing a "once-over" or I would have allowed
the "magic smoke" to escape !!!
I seem to remember someone else finding loose screws.
One place I worked always played an air line around the kit before
putting the covers on looking for surplus/dropped screws and other rubbish.
BTW I'm very pleased with the 2225, works nicely and is a bit more
portable than the 744A.? I'd have preferred a 2235, but I may get one of
those as well - just don't tell the wife !!! ;-)
Now at 5 and counting ;-)
Dave
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Re: Russian Tunnel Diodes
FWIW there's a very nice 40 pS rise time 10 MHz square wave pulser at leobodnar.com. The BNC version is about $80 US. Leo has just developed a variant that produces 100 pS spikes.
Not germane to making a repair, but if the goal is having a fast step generator it's hard to beat. Each one is individually tested and a printout of the step response provided. Mine actually has a 36 pS rise time. Leo also has them with 3.5 and 2.92 mm connectors spec'd at 30 pS.
I covered mine with a large piece of heat shrink for protection.
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Re: Russian Tunnel Diodes
There are photos in the group archives. Description somehow messed up during
the transfer from Yahoo but all the photos seem to be still there. Or you
can try to find them in abandoned Yahoo group if it still exists.
Hi Sergey Kubushyn:
Thanks for your reply and I try to find the posted ( is there any photos ?
) ,just message in group .
I will try to build it .
Regard
Tony Cheung
DEC 8 2018 I understand entirely the interest in building TD pulsers, and replicating/repairing Tek ones. But a bit of heresy - the Leo Bodnar pulsers produce 30ps rise, and around 24ps fall time. They come with a calibration certificate too. For UKP49 to UKP99 depending on the output connector. Run from USB power, from which you can adjust the amplitude from the app. They run at 10MHz with 2.5ppm accuracy, so can be used for timebase checks too. I have the BNC version, which is the cheapest. Craig
|
Re: Russian Tunnel Diodes
On Sat, 8 Dec 2018, Yiu On Tony C via Groups.Io wrote: There are photos in the group archives. Description somehow messed up during the transfer from Yahoo but all the photos seem to be still there. Or you can try to find them in abandoned Yahoo group if it still exists. Hi Sergey Kubushyn:
Thanks for your reply and I try to find the posted ( is there any photos ?
) ,just message in group .
I will try to build it .
Regard
Tony Cheung
DEC 8 2018
--------------------------------------------
On Sat, 12/8/18, Sergey Kubushyn <ksi@...> wrote:
Subject: Re: [TekScopes] Russian Tunnel Diodes
To: [email protected]
Date: Saturday, December 8, 2018, 12:47 PM
On Sat, 8 Dec 2018, Yiu On Tony C
via Groups.Io wrote:
GI308D
:) Mil spec variant is called 1I308D i.e. having number 1
instead of
letter G for Germanium. That is
true for all semiconductors made in former
USSR. In cyrillic it is called §¤§ª308§¥ or
1§ª308§¥. GI308zH (§¤§ª308§¨ in
cyrillic) is
even faster having 20mA peak current instead of 10mA for
GI308D
with almost same capacitance 1..4pF
vs 0.8..2pF for GI308D. And finally
there is
GI308K with 50mA peak current having 2.3..8pF capacitance
that is
similar to those used in Tektronix
S-52.
For the pulser built
from 067-0681-01 schematic the proper part is GI308D
that is actually much better than original
Tektronix 152-0177-02 tunnel
diode.
Hi :
I cannot find such item on ebay ? What is the diode number ?
Thanks for your
help
Regard
Tony Cheung
DEC 8
2018
--------------------------------------------
On Sat, 12/8/18, Jack Reynolds <jackandladyreynolds@...> wrote:
Subject:
[TekScopes] Russian Tunnel Diodes
To: [email protected]
Date: Saturday, December 8, 2018, 4:39 AM
Back in 2013
Sergey Kubushyn posted a great
explanation of how to build a clone of a Tektronix
067-0681
TD Pulser.? It required a specific Russian surplus
tunnel diode.? While there are always a bunch of
Russian tunnel diodes on eBay, the specific one he specified
has been impossible for me to find.? However, some just
appeared on eBay.? There is one group of 10 pcs still
available and they are quite pricey compared to the other
ones for sale at $80 USD for 10 pieces.? The prices of
the available pulsers make this look reasonable.?
However if there is anyone else as desperate as I have been
to find some they are eBay item no. 323585650249.? I
hope this helps someone.
Jack Reynolds --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
|
Re: Russian Tunnel Diodes
Hi Sergey Kubushyn:
Thanks for your reply and I try to find the posted ( is there any photos ? ) ,just message in group .
I will try to build it .
Regard
Tony Cheung
DEC 8 2018
--------------------------------------------
toggle quoted message
Show quoted text
On Sat, 12/8/18, Sergey Kubushyn <ksi@...> wrote: Subject: Re: [TekScopes] Russian Tunnel Diodes To: [email protected] Date: Saturday, December 8, 2018, 12:47 PM On Sat, 8 Dec 2018, Yiu On Tony C via Groups.Io wrote: GI308D :) Mil spec variant is called 1I308D i.e. having number 1 instead of letter G for Germanium. That is true for all semiconductors made in former USSR. In cyrillic it is called §¤§ª308§¥ or 1§ª308§¥. GI308zH (§¤§ª308§¨ in cyrillic) is even faster having 20mA peak current instead of 10mA for GI308D with almost same capacitance 1..4pF vs 0.8..2pF for GI308D. And finally there is GI308K with 50mA peak current having 2.3..8pF capacitance that is similar to those used in Tektronix S-52. For the pulser built from 067-0681-01 schematic the proper part is GI308D that is actually much better than original Tektronix 152-0177-02 tunnel diode. > Hi : > > I cannot find such item on ebay ? What is the diode number ? > > Thanks for your help > > Regard > Tony Cheung > DEC 8 2018 > -------------------------------------------- > On Sat, 12/8/18, Jack Reynolds <jackandladyreynolds@...> wrote: > > Subject: [TekScopes] Russian Tunnel Diodes > To: [email protected] > Date: Saturday, December 8, 2018, 4:39 AM > > Back in 2013 Sergey Kubushyn posted a great > explanation of how to build a clone of a Tektronix 067-0681 > TD Pulser.? It required a specific Russian surplus > tunnel diode.? While there are always a bunch of > Russian tunnel diodes on eBay, the specific one he specified > has been impossible for me to find.? However, some just > appeared on eBay.? There is one group of 10 pcs still > available and they are quite pricey compared to the other > ones for sale at $80 USD for 10 pieces.? The prices of > the available pulsers make this look reasonable.? > However if there is anyone else as desperate as I have been > to find some they are eBay item no. 323585650249.? I > hope this helps someone. > Jack Reynolds --- * *? KSI@home? ? KOI8 Net? < >? The impossible we do immediately.? * *? Las Vegas? NV, USA? < >? Miracles require 24-hour notice.? * *
|
Re: Russian Tunnel Diodes
On Sat, 8 Dec 2018, Yiu On Tony C via Groups.Io wrote: GI308D :) Mil spec variant is called 1I308D i.e. having number 1 instead of letter G for Germanium. That is true for all semiconductors made in former USSR. In cyrillic it is called §¤§ª308§¥ or 1§ª308§¥. GI308zH (§¤§ª308§¨ in cyrillic) is even faster having 20mA peak current instead of 10mA for GI308D with almost same capacitance 1..4pF vs 0.8..2pF for GI308D. And finally there is GI308K with 50mA peak current having 2.3..8pF capacitance that is similar to those used in Tektronix S-52. For the pulser built from 067-0681-01 schematic the proper part is GI308D that is actually much better than original Tektronix 152-0177-02 tunnel diode. Hi :
I cannot find such item on ebay ? What is the diode number ?
Thanks for your help
Regard
Tony Cheung
DEC 8 2018
--------------------------------------------
On Sat, 12/8/18, Jack Reynolds <jackandladyreynolds@...> wrote:
Subject: [TekScopes] Russian Tunnel Diodes
To: [email protected]
Date: Saturday, December 8, 2018, 4:39 AM
Back in 2013 Sergey Kubushyn posted a great
explanation of how to build a clone of a Tektronix 067-0681
TD Pulser.? It required a specific Russian surplus
tunnel diode.? While there are always a bunch of
Russian tunnel diodes on eBay, the specific one he specified
has been impossible for me to find.? However, some just
appeared on eBay.? There is one group of 10 pcs still
available and they are quite pricey compared to the other
ones for sale at $80 USD for 10 pieces.? The prices of
the available pulsers make this look reasonable.?
However if there is anyone else as desperate as I have been
to find some they are eBay item no. 323585650249.? I
hope this helps someone.
Jack Reynolds --- * * KSI@home KOI8 Net < > The impossible we do immediately. * * Las Vegas NV, USA < > Miracles require 24-hour notice. * *
|
Re: Russian Tunnel Diodes
Hi :
I cannot find such item on ebay ? What is the diode number ?
Thanks for your help
Regard
Tony Cheung
DEC 8 2018
--------------------------------------------
toggle quoted message
Show quoted text
On Sat, 12/8/18, Jack Reynolds <jackandladyreynolds@...> wrote: Subject: [TekScopes] Russian Tunnel Diodes To: [email protected] Date: Saturday, December 8, 2018, 4:39 AM Back in 2013 Sergey Kubushyn posted a great explanation of how to build a clone of a Tektronix 067-0681 TD Pulser.? It required a specific Russian surplus tunnel diode.? While there are always a bunch of Russian tunnel diodes on eBay, the specific one he specified has been impossible for me to find.? However, some just appeared on eBay.? There is one group of 10 pcs still available and they are quite pricey compared to the other ones for sale at $80 USD for 10 pieces.? The prices of the available pulsers make this look reasonable.? However if there is anyone else as desperate as I have been to find some they are eBay item no. 323585650249.? I hope this helps someone. Jack Reynolds
|
Now just what do I do if I have to display more than 12 waveforms at once ? Ah - you can do that with a single 7844
|
Ha, Vincent, how apropos!? My wife and I are in the process of moving stuff out of her parents' house to sell it.? We went through the closet recently and found enough shoes to make Imelda Marcos envious!? Most probably never worn and some literally crumbling into dust!
As far as scopes goes, I'm at 4 but that is by no means the end of the story.? ?I'd like a 7854 to put my sampling plug-ins in and average out the noise and jitter, a CSA803 or 11801-11803 for 20 GHz+ sampling, parts mule 7603, 7854, 5110, HP 54504A,? and 7904, and maybe a USB DSO for the portability.? ?Maybe a 485 or 2465B/2567 to have a nice high-BW analog scope.? Something like that.?
Jim F
Sent from my Verizon, Samsung Galaxy smartphone
toggle quoted message
Show quoted text
-------- Original message --------From: Vincent Trouilliez <vincent.trouilliez@...> Date: 12/7/18 2:04 PM (GMT-08:00) To: [email protected] Subject: Re: [TekScopes] How Many Scopes? On Fri, Dec? 7, 2018 at 10:59 AM, Jeff Urban wrote: I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now
just what do I do if I have to display more than 12 waveforms at once ? I guess it's like asking a women why does she have 564 different pairs of shoes, but only one pair of feet to use them with.... ^^ Vincent Trouilliez
|
On Fri, Dec 7, 2018 at 10:59 AM, Jeff Urban wrote: I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now
just what do I do if I have to display more than 12 waveforms at once ? I guess it's like asking a women why does she have 564 different pairs of shoes, but only one pair of feet to use them with.... ^^ Vincent Trouilliez
|
Back in 2013 Sergey Kubushyn posted a great explanation of how to build a clone of a Tektronix 067-0681 TD Pulser. It required a specific Russian surplus tunnel diode. While there are always a bunch of Russian tunnel diodes on eBay, the specific one he specified has been impossible for me to find. However, some just appeared on eBay. There is one group of 10 pcs still available and they are quite pricey compared to the other ones for sale at $80 USD for 10 pieces. The prices of the available pulsers make this look reasonable. However if there is anyone else as desperate as I have been to find some they are eBay item no. 323585650249. I hope this helps someone.
Jack Reynolds
|
I feel so disadvantaged. I only have three Tek scopes and three mongrels. Now just what do I do if I have to display more than 12 waveforms at once ?
|
Late 7854 Service Manual (paper version)
Hi to all,
I have the early version and a soft copy of the later one. I would like to
get later version of this in paper form if possible.
Is anyone able to assist?
Thanks
David
|
7k extender to borrow in greater Montreal?
Hey y'all,
I've just acquired a 7T11. This one - unlike the last one - wasn't
pulverized in transport, and is in almost perfect mechanical shape. It
seems to mostly work, except I believe the triggering is in need of some
TLC. At first it didn't work at all, but after wiggling all the socketed
components on the trigger board, it seems to have started working again.
I wonder if there's anyone here in the frozen tundra of Montreal, Canada
that has a 7k plugin extender they'd be willing to lend me?
Siggi
|
Looking for 604 XY monitor
I'm looking for a 604, my old one just bit the dust.. something in the HV supply keeps popping the 1AMP fuse.. it had previous problems with the +215 which i managed to repair but this is getting annoying so thinking it might be time for replacement
thanks!
-rick
|
I too had to draw the line somewhere, and it was also with the portables.? Somewhere north of 80, with no 2xxx or 4xx scopes.?? I almost bought a 535(I think) plus cart, CA, 1L10 and 1S2 for $35 at an estate sale a month ago, but another guy bought it out from under me (almost literally!- I was going to buy it, but noticed that the right cover was lifted and a tube was missing.? I was in the process of pulling the panel to see if it had been completely harvested, when the guy told the seller right behind me that he'd take the whole thing.? He just spoke before I thought to, and I didn't feel like arguing.)? ?He turned around the 1L10 and 1S2 on ebay for $199.99 about 3 weeks ago.? I got a nice 1L5, W, O and 1A6 from the same sale.? The former owner was a ham and experimented with TV, but his garage must have been regularly damp because much of the hardware has developed the white "fuzz".?? The type W is labeled as being "modified for station B".? It's not clear what that means; I initially thought that the B input had been routed to the A channel, but I don't see any evidence of that.? I have so many projects, it could be quite a while before I "get round tuit" -Dave From: Craig Sawyers <c.sawyers@...> To: [email protected] Sent: Thursday, December 6, 2018 3:08 PM Subject: Re: [TekScopes] How Many Scopes? What Craig,? no 24**'s ?? Got to draw the line somewhere. My long-suffering wife already points out that there is a fine dividing line between collecting and restoring Tek gear and mental illness ;-) Oh - almost forgot my "handbag" scope - a lightweight four channel 60MHz Tek 2004B. My only real foray into digital storage oscilloscopes (other than the 7854 and 7912HB that is) Craig
|
On Thu, 6 Dec 2018 16:43:41 -0500, you wrote:
Sent from Mail for Windows 10
From: Harvey White
Sent: Thursday, December 6, 2018 4:29 PM
To: [email protected]
Subject: Re: [TekScopes] How Many Scopes?
On Thu, 6 Dec 2018 16:19:16 -0500, you wrote:
You're missing space for more scopes.
Depending on what you think of as the service life of the scope,
coupled with how long you will be using it, and throw in the little
bit that these scope parts are in limited supply.....
I'd like to have a good working scope, one working spare, and enough
parts units to be able to replace almost everything once.
Having said that, you may want to look into calibration equipment for
your scopes, if you want to start doing that yourself.
Those plugins will fit in a TM506 right next to the SC501.
Hi Harvey,
I¡¯m actually up to my ears with other projects and one of our members here in the US does terrific repairs and calibrations.
This is probably not very smart but I compared the measurement I get on the other scopes to the calibrated one and find them pretty close, certainly close enough for what I do.
I am set up for a number of repairs and calibration steps, so that's not the problem. Up to my ears in a lot of projects, too. However, as long as the scope is close enough for you, that's good enough. The more scopes you have, the more you'll feel as if you need more calibration stuff. Harvey
Best regards, john
|
Lop pol, I was going to say at least no vacuum tubes except the CRT, but you said you want one (or two, or more).? Personally, I don't see why you would want a tube scope.? I mean, tubes are great for audio and guitar amplifiers, but why mess around with shack-heating fire bottles?? My preference is for 7000 and 5000 series solid-state scopes, although I do own an HP 54504A DSO because they were throwing it out at work.
Maybe if you used a tube scope back in the old days?? I used to have an HP 8566 spectrum analyzer, an 8350B sweeper, and 8494 and 8495 step attenuators back 25+ years ago at work, and now I have them all in my garage lab.? Had a Tek 2465B as well, but the knob and button lag drove me crazy, so I have no? intention of buying one now.? I sure would like a CSA803 again, but working on those digital beasts is such a pain.? Oh well.
Jim F
Sent from my Verizon, Samsung Galaxy smartphone
toggle quoted message
Show quoted text
-------- Original message --------From: "lop pol via Groups.Io" <the_infinite_penguin@...> Date: 12/6/18 5:51 PM (GMT-08:00) To: [email protected] Subject: Re: [TekScopes] How Many Scopes? Glad I'm not the only one with this illness. two 453's two 485's two newly acquired 2430A's 2213A 2215 2221 468 TDS320 also newly acquired 7633 465 TM504 TM506 And currently working on a TDS420 power supply. I hope I can add it to the rest of working scopes. I want to add a 475, something tubed and a higher end 24xx series. I love this hobby and the people involved.
|
Perhaps we should rename this group "Scopes Anonymous" ;-)
Dave
|
Sergey Kubushyn
Yiu On Tony C
Vince
Jeff Urban
David C. Partridge