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Re: Coax for Calibration Instruments
RG8/U is still alive at Belden in the form 'RG8A/U Type', but being
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referenced to MIL-C-17D can not be too far off. At the first glance, RG213U appears to be similar, but there must be some minor difference or there would not be another RG number. You can look at the details at Belden's web site: . That is cross reference for RG to current cables and then you can find complete catalog at: Regards Miroslav Pokorni ----- Original Message -----
From: "Bill Smith" <ko4nrbs@...> To: "Tektronix Group" <TekScopes@...> Sent: Thursday, March 04, 2004 6:11 AM Subject: [TekScopes] Coax for Calibration Instruments The manual for the Tektronix 453 oscilloscope calls |
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Re: Bias batteries in 7S14
Greyhawk
Ask NR1DX, He Often Has The Disc On His E-Bay Auction. Just Search By Single Seller, And Enter NR1DX. Has Quality Scans Available.
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Greyhawk ----- Original Message -----
From: Scott Newell To: TekScopes@... Sent: Thursday, March 04, 2004 15:44 Subject: Re: [TekScopes] Bias batteries in 7S14 At 02:43 PM 3/4/2004 , Michael Dunn wrote: > Does anyone have a digitized manual...? Yes. newell 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. |
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Re: Bias batteries in 7S14
With all the talk of TEK samplers and the mention of the 7S14, I wonder what are we 7S14 owners to do these days when it comes to replacing the bias batteries in the 7S14? I gather that the merc oxide batteries originally spec'ed are no longer available. Is the 1.35V merc oxide batt voltage that strict a spec in the 7S14?The only kind of mercury cells I can find can be seen at I have ordered cells from here before for my older Rollei SLR light meter. The cells I received appeared to be of Mexican origin. These appear to be available for a short time. Perhaps an button cell adapter is in order. The loss of mercury cells has caused an impact on both the older camera and the Bulova Accutron wristwatch collector community (the watches use #343 or #387 cells, which have been unobtainable for several years now). I will spare the list from listening to a rant about environmentalists ;). Your tax dollars at work. I refurbished an old Simco electrostatic voltmeter that used mercury cells for both a reference and a differential opamp supply. I ended up making some postage stamp PCBs incorporating some Linear Technology micropower regulators that allowed me to generate the needed voltages from alkaline cells. -Dan |
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Re: Bias batteries in 7S14
Dennis Tillman
I have two of these units. One has a bad battery
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but the other one is still working fine after 25 years! Dennis -----Original Message-----
From: vollumscope [mailto:perls@...] Sent: Thursday, March 04, 2004 10:39 AM To: TekScopes@... Subject: [TekScopes] Bias batteries in 7S14 Howdy all- With all the talk of TEK samplers and the mention of the 7S14, I wonder what are we 7S14 owners to do these days when it comes to replacing the bias batteries in the 7S14? I gather that the merc oxide batteries originally spec'ed are no longer available. Is the 1.35V merc oxide batt voltage that strict a spec in the 7S14? Thoughts? -Vollumscope Yahoo! Groups Links |
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Re: Coax for Calibration Instruments
Stan & Patricia Griffiths
Hi Bill,
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I generally use just about any random piece of RG58 that is 2-6 feet long for these applications. It really does not seem to make a lot of difference. It will make more difference when you calibrate scopes above 100 MHz bandwidth. Stan w7ni@... ----- Original Message -----
From: "Bill Smith" <ko4nrbs@...> To: "Tektronix Group" <TekScopes@...> Sent: Thursday, March 04, 2004 6:11 AM Subject: [TekScopes] Coax for Calibration Instruments The manual for the Tektronix 453 oscilloscope calls |
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Re: Bias batteries in 7S14
Michael Dunn
Does anyone have a digitized manual...?
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At 12:45 PM -0600 2004/3/4, Scott Newell wrote:
At 12:39 PM 3/4/2004 , vollumscope wrote:With all the talk of TEK samplers and the mention of the 7S14, IFunny, I was going to ask if there were any symptoms of weak cells. |
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Re: Bias batteries in 7S14
Scott Newell
At 12:39 PM 3/4/2004 , vollumscope wrote:
With all the talk of TEK samplers and the mention of the 7S14, IFunny, I was going to ask if there were any symptoms of weak cells. Anything to watch out for? newell |
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Bias batteries in 7S14
Howdy all-
With all the talk of TEK samplers and the mention of the 7S14, I wonder what are we 7S14 owners to do these days when it comes to replacing the bias batteries in the 7S14? I gather that the merc oxide batteries originally spec'ed are no longer available. Is the 1.35V merc oxide batt voltage that strict a spec in the 7S14? Thoughts? -Vollumscope |
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Coax for Calibration Instruments
Bill Smith
The manual for the Tektronix 453 oscilloscope calls
for a specific length of coax between the calibration instruments and the oscilloscope, i.e. 42 inches. I noticed in the manual for the 191 Constant Amplitiude Signal Generator instuctions to use RG8A/U coax. I have been told RG213/U is the direct replacement for this coax now. Is this a fact? What do you all use? Thanks, Bill ===== Bill Smith KO4NR __________________________________ Do you Yahoo!? Yahoo! Search - Find what you?re looking for faster |
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Re: More "crispy display" ranting......
jeans
This link should work
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<>. Don Black. Jeff W wrote: I came across this 7904 earlier today on the 'bay: |
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Re: More "crispy display" ranting......
Brian Goldsmith
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From: "Jeff W" I came across this 7904 earlier today on the 'bay: ViewItem&item=3801633404&category=45005 Hmm, looks like an OK deal if it worked, as implied. But then as I read thru the text, I came across this statement: "Powers up with a crisp disp., no modules to test the unit. Guaranteed to power up." Huh? sez me. Crisp Display? Anyone that knows anything about 7K mainframes knows that without plugins, you have NO display, let alone a "nice crisp display". So since he has no modules, how does he know it has a "crisp display"? Enquiring minds need to know! **** Ask the seller,if nothing else it will make him realise that he is ,"just a little dodgey". Brian Goldsmith. Yahoo! Groups Links |
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Re: Manual for Philips PM3200
Andreas Troschka
For manuals and schematics about Philips equipment ask to Toine PD0MHS:
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73s de Andreas IK2WQI sreaves22655 wrote: Hello, |
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R7103
Andreas Troschka
This one is a TEKTRONIX R7103 1GHz analog scope, the rackmount version
of the 7104. I do own both bought during the last year. I've seen really seldom one, and this seems to be in really nice condition (riatla says) and it is calibrated. I don't think somebody will pay more than 500US$ (reserve price!) for it but remember you have also to add the plugins. To be honest you should push in at least a 7A29(also opt.04) and a 7B10/15. But I'd add also 7A24/26 to have the 1MOhm input lower BW alternatives to the 50Ohm of the 1GHz VAmp plugin, and some double timebase of choice. Pay attention on the 3! slots instead of 4 of the 7104! Anyway #3800875191 is the reference. Remember to let you tell about the status of the hard to find Microchannel CRT! I already own one so I'm not personally interested on this scope. Andreas. |
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Re: 7S/7T Sampling System
Craig Sawyers
Hi Stan
One thing that I did not see in the explanation below is what the risetimePPL measured 20ps as the rise time of the initial event, which exceeds spec of course. But remember that the 500ps delay line they used is only around 4" of rigid air line, not the 50 feet of flexible from the 7M11. This severely lenthens the leading edge with a specified 175ps rise, in spite of all the neat tricks that Tek do with compensation components. Also not mentioned is that the S4, when introduced in 1969, wasWell, I don't think they were knocking older samplers. The S6 was introduced in 1971, and the review had high praise for the *overall* performance of that particular head, even though the rise time is slower at 28ps. Aslo the HP1430A,B and C were in the same review, and the HP1340A was introduced in 1966 with the B and C in 1972. These also give much better settling than the S4, even though the "A" version predates it by three years. They measured 29ps for the A version and 22ps for the C. That review was dated February 1989. However, in spite of what they say, it depends on what you are measuring; if you are looking at only the leading edge, then the S4 is fine. But if circuit behaviour is being looked at out to the ns time domain it might not be the best choice. Craig |
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Re: Tunnel Diode for 1S1
Stan & Patricia Griffiths
Hi Gang,
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I certainly know the part is good. It is the correct firing current which means that it will probably bias correctly in the circuit. The capacitance is quite a lot greater than the original part so it may not switch as fast but it will probably switch OK. Depending on exactly where the tunnel diode in question is in the 1S1 circuit will depend on how well the 1S1 will work with a 152-0125-00 in place of a 152-0214-00. I don't know because I have never tried this before but I would not hesitate to try it. Stan w7ni@... PS I sell these TD's in my Parts Shop also: ----- Original Message -----
From: "Darrin Conniff" <djconniff@...> To: "Greyhawk" <greyhawkeng@...> Cc: <TekScopes@...> Sent: Monday, March 01, 2004 8:06 PM Subject: Re: [TekScopes] Tunnel Diode for 1S1 Hello Greyhawk,know it is quality product. Good luck. plug-in I bought at ebay! While I was cleaning the plug-in I found a Tunnel Diodewith one of its "legs" broken off. I unsoldered it just to see that thesecond leg was also defective. Does anyone know where to find this tunneldiode? It is D304 in the 1S1, Manual says:is there a possible substitution?---- Yahoo! Groups LinksService.
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