Before you can call yourself a scientist you do have to have published a paper in a peer-reviewed sceintific journal and have seen it cited by somebody else.
I made it with my very first publication - which was a mere comment, back in 1972. It got cited by A T Young in Methods in Experimental Physics, in 1974.
I didn't know about the citation until Phil Hobbes pointed it out some thirty years later
--
Bill Sloman, Sydney
Reply by John Larkin●May 6, 20232023-05-06
On Sat, 6 May 2023 12:26:30 -0700 (PDT), The Scientist
<thegreatestscientistoftheworld@hotmail.com> wrote:
> On Wed, 3 May 2023 10:58:31 +0300, Tauno Voipio
> <tauno.voipio@notused.fi.invalid> wrote:
>
>> On 3.5.2023 2.27, John Larkin wrote:
>>> On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
>>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>>
>>>> On 2023-05-02 11:15, Fred Bloggs wrote:
>>>>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>>>>> The Tek power supply thread reminded me of these interesting old
>>>>>> books, some of which are still an excellent read.
>>>>>>
>>>>>> https://www.davmar.org/concepts.html
>>>>>>
>>>>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>>>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>>>>
>>>>>> (The Power Supply Circuits book is too old to be much use, though
>>>>>> it does talk about switchers a bit.)
>>>>>
>>>>> Dunno about those particulars, I don't think, but the older Tek
>>>>> documentation gave excellent illustrations of higher complexity
>>>>> electronic subsystems are conceived in the first place. They were a
>>>>> mix of electronic components and function blocks, the only way to do
>>>>> it.
>>>>>
>>>>
>>>> The Sampling Oscilloscope Circuits one is also a very good read even
>>>> today--the notion of the sampling loop, where you feed back the
>>>> previously sampled value to reduce the size of the settling step, is
>>>> still very useful.
>>>>
>>>> Generally the cool thing about the old Tektronix was that they made
>>>> fast, clean measurement tools using the same components everybody else
>>>> had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>>>> amplifier, maximum-power point biasing(*), distributed deflection tubes,
>>>> and on and on.
>>>>
>>>> Magic.
>>>>
>>>> Cheers
>>>>
>>>> Phil Hobbs
>>>>
>>>> (*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
>>>
>>> Their differential comparator plugins (Z, W, 1Asomething) were
>>> astounding. You could zoom the top of a 100 volt pulse to mV/div.
>>>
>>> Here's the CRT from a 547:
>>>
>>> https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
>>>
>>> It's a beautiful piece of glass.
>>>
>>> This isn't as pretty. It's from the 519, the monster 1 GHz scope that
>>> had no vertical amp.
>>>
>>> https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
>>>
>>> I dug that out of an old scope, out in the rain, in a parking lot in
>>> Los Alamos.
>>>
>>> The horizontal deflection amp was a transmitting tube, a 2CX250 or
>>> something.
>>>
>>
>> 2CX250 would be a diode, AFAIK there is no such. I'd guess 4CX250A.
>>
>> The Eimac transmitting tubes had plenty coded into the type marking:
>> - 4: tetrode,
>> - C: ceramic sleeve, instead of glass,
>> - X: external anode
>> - 250: max anode dissipation 250 W
>> - A: first re-design version
>
> That's probably it. The giant jug actually generates the sweep ramp.
The F version has different heater voltage, 26.5 V.
The tube is a smalish transmitting tube, 42 mmm dia by 47 mm high.
For the giant jugs, start at 4CX35000, or glass tubes from 1 kW up.
--
-TV
Reply by John Larkin●May 3, 20232023-05-03
On Wed, 3 May 2023 10:58:31 +0300, Tauno Voipio
<tauno.voipio@notused.fi.invalid> wrote:
>On 3.5.2023 2.27, John Larkin wrote:
>> On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> On 2023-05-02 11:15, Fred Bloggs wrote:
>>>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>>>> The Tek power supply thread reminded me of these interesting old
>>>>> books, some of which are still an excellent read.
>>>>>
>>>>> https://www.davmar.org/concepts.html
>>>>>
>>>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>>>
>>>>> (The Power Supply Circuits book is too old to be much use, though
>>>>> it does talk about switchers a bit.)
>>>>
>>>> Dunno about those particulars, I don't think, but the older Tek
>>>> documentation gave excellent illustrations of higher complexity
>>>> electronic subsystems are conceived in the first place. They were a
>>>> mix of electronic components and function blocks, the only way to do
>>>> it.
>>>>
>>>
>>> The Sampling Oscilloscope Circuits one is also a very good read even
>>> today--the notion of the sampling loop, where you feed back the
>>> previously sampled value to reduce the size of the settling step, is
>>> still very useful.
>>>
>>> Generally the cool thing about the old Tektronix was that they made
>>> fast, clean measurement tools using the same components everybody else
>>> had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>>> amplifier, maximum-power point biasing(*), distributed deflection tubes,
>>> and on and on.
>>>
>>> Magic.
>>>
>>> Cheers
>>>
>>> Phil Hobbs
>>>
>>> (*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
>>
>> Their differential comparator plugins (Z, W, 1Asomething) were
>> astounding. You could zoom the top of a 100 volt pulse to mV/div.
>>
>> Here's the CRT from a 547:
>>
>> https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
>>
>> It's a beautiful piece of glass.
>>
>> This isn't as pretty. It's from the 519, the monster 1 GHz scope that
>> had no vertical amp.
>>
>> https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
>>
>> I dug that out of an old scope, out in the rain, in a parking lot in
>> Los Alamos.
>>
>> The horizontal deflection amp was a transmitting tube, a 2CX250 or
>> something.
>>
>
>2CX250 would be a diode, AFAIK there is no such. I'd guess 4CX250A.
>
>The Eimac transmitting tubes had plenty coded into the type marking:
> - 4: tetrode,
> - C: ceramic sleeve, instead of glass,
> - X: external anode
> - 250: max anode dissipation 250 W
> - A: first re-design version
> On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> On 2023-05-02 11:15, Fred Bloggs wrote:
>>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>>> The Tek power supply thread reminded me of these interesting old
>>>> books, some of which are still an excellent read.
>>>>
>>>> https://www.davmar.org/concepts.html
>>>>
>>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>>
>>>> (The Power Supply Circuits book is too old to be much use, though
>>>> it does talk about switchers a bit.)
>>>
>>> Dunno about those particulars, I don't think, but the older Tek
>>> documentation gave excellent illustrations of higher complexity
>>> electronic subsystems are conceived in the first place. They were a
>>> mix of electronic components and function blocks, the only way to do
>>> it.
>>>
>>
>> The Sampling Oscilloscope Circuits one is also a very good read even
>> today--the notion of the sampling loop, where you feed back the
>> previously sampled value to reduce the size of the settling step, is
>> still very useful.
>>
>> Generally the cool thing about the old Tektronix was that they made
>> fast, clean measurement tools using the same components everybody else
>> had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>> amplifier, maximum-power point biasing(*), distributed deflection tubes,
>> and on and on.
>>
>> Magic.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>> (*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
>
> Their differential comparator plugins (Z, W, 1Asomething) were
> astounding. You could zoom the top of a 100 volt pulse to mV/div.
>
> Here's the CRT from a 547:
>
> https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
>
> It's a beautiful piece of glass.
>
> This isn't as pretty. It's from the 519, the monster 1 GHz scope that
> had no vertical amp.
>
> https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
>
> I dug that out of an old scope, out in the rain, in a parking lot in
> Los Alamos.
>
> The horizontal deflection amp was a transmitting tube, a 2CX250 or
> something.
>
2CX250 would be a diode, AFAIK there is no such. I'd guess 4CX250A.
The Eimac transmitting tubes had plenty coded into the type marking:
- 4: tetrode,
- C: ceramic sleeve, instead of glass,
- X: external anode
- 250: max anode dissipation 250 W
- A: first re-design version
--
-TV
Reply by John Larkin●May 2, 20232023-05-02
On Tue, 2 May 2023 20:11:09 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>On 2023-05-02 19:27, John Larkin wrote:
>> On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
>> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>>
>>> On 2023-05-02 11:15, Fred Bloggs wrote:
>>>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>>>> The Tek power supply thread reminded me of these interesting old
>>>>> books, some of which are still an excellent read.
>>>>>
>>>>> https://www.davmar.org/concepts.html
>>>>>
>>>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>>>
>>>>> (The Power Supply Circuits book is too old to be much use, though
>>>>> it does talk about switchers a bit.)
>>>>
>>>> Dunno about those particulars, I don't think, but the older Tek
>>>> documentation gave excellent illustrations of higher complexity
>>>> electronic subsystems are conceived in the first place. They were a
>>>> mix of electronic components and function blocks, the only way to do
>>>> it.
>>>>
>>>
>>> The Sampling Oscilloscope Circuits one is also a very good read even
>>> today--the notion of the sampling loop, where you feed back the
>>> previously sampled value to reduce the size of the settling step, is
>>> still very useful.
>>>
>>> Generally the cool thing about the old Tektronix was that they made
>>> fast, clean measurement tools using the same components everybody else
>>> had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>>> amplifier, maximum-power point biasing(*), distributed deflection tubes,
>>> and on and on.
>>>
>>> Magic.
>>>
>>> Cheers
>>>
>>> Phil Hobbs
>>>
>>> (*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
>>
>> Their differential comparator plugins (Z, W, 1Asomething) were
>> astounding. You could zoom the top of a 100 volt pulse to mV/div.
>>
>> Here's the CRT from a 547:
>>
>> https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
>>
>> It's a beautiful piece of glass.
>>
>> This isn't as pretty. It's from the 519, the monster 1 GHz scope that
>> had no vertical amp.
>>
>> https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
>>
>> I dug that out of an old scope, out in the rain, in a parking lot in
>> Los Alamos.
>>
>> The horizontal deflection amp was a transmitting tube, a 2CX250 or
>> something.
>
>
>I wouldn't have wanted the guy who had to stand in the vacuum chamber
>adjusting those things before they put the envelopes on. ;)
I wonder how they tuned that delay line too. Maybe TDR in open air?
>
>Cheers
>
>Phil Hobbs
Los Alamos had racks full of their own custom 8-beam scope which they
took Polaroids of to record many channels of a one-shot event. Before
digitizers got good enough.
They also had an x-ray pulser, an L shape, two linear induction
electron accelerators a quarter mile long each.
Reply by Phil Hobbs●May 2, 20232023-05-02
On 2023-05-02 19:27, John Larkin wrote:
> On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
> <pcdhSpamMeSenseless@electrooptical.net> wrote:
>
>> On 2023-05-02 11:15, Fred Bloggs wrote:
>>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>>> The Tek power supply thread reminded me of these interesting old
>>>> books, some of which are still an excellent read.
>>>>
>>>> https://www.davmar.org/concepts.html
>>>>
>>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>>
>>>> (The Power Supply Circuits book is too old to be much use, though
>>>> it does talk about switchers a bit.)
>>>
>>> Dunno about those particulars, I don't think, but the older Tek
>>> documentation gave excellent illustrations of higher complexity
>>> electronic subsystems are conceived in the first place. They were a
>>> mix of electronic components and function blocks, the only way to do
>>> it.
>>>
>>
>> The Sampling Oscilloscope Circuits one is also a very good read even
>> today--the notion of the sampling loop, where you feed back the
>> previously sampled value to reduce the size of the settling step, is
>> still very useful.
>>
>> Generally the cool thing about the old Tektronix was that they made
>> fast, clean measurement tools using the same components everybody else
>> had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>> amplifier, maximum-power point biasing(*), distributed deflection tubes,
>> and on and on.
>>
>> Magic.
>>
>> Cheers
>>
>> Phil Hobbs
>>
>> (*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
>
> Their differential comparator plugins (Z, W, 1Asomething) were
> astounding. You could zoom the top of a 100 volt pulse to mV/div.
>
> Here's the CRT from a 547:
>
> https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
>
> It's a beautiful piece of glass.
>
> This isn't as pretty. It's from the 519, the monster 1 GHz scope that
> had no vertical amp.
>
> https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
>
> I dug that out of an old scope, out in the rain, in a parking lot in
> Los Alamos.
>
> The horizontal deflection amp was a transmitting tube, a 2CX250 or
> something.
I wouldn't have wanted the guy who had to stand in the vacuum chamber
adjusting those things before they put the envelopes on. ;)
Cheers
Phil Hobbs
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.nethttp://hobbs-eo.com
Reply by John Larkin●May 2, 20232023-05-02
On Tue, 2 May 2023 11:36:58 -0400, Phil Hobbs
<pcdhSpamMeSenseless@electrooptical.net> wrote:
>On 2023-05-02 11:15, Fred Bloggs wrote:
>> On Tuesday, May 2, 2023 at 10:39:46?AM UTC-4, Phil Hobbs wrote:
>>> The Tek power supply thread reminded me of these interesting old
>>> books, some of which are still an excellent read.
>>>
>>> https://www.davmar.org/concepts.html
>>>
>>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>>
>>> (The Power Supply Circuits book is too old to be much use, though
>>> it does talk about switchers a bit.)
>>
>> Dunno about those particulars, I don't think, but the older Tek
>> documentation gave excellent illustrations of higher complexity
>> electronic subsystems are conceived in the first place. They were a
>> mix of electronic components and function blocks, the only way to do
>> it.
>>
>
>The Sampling Oscilloscope Circuits one is also a very good read even
>today--the notion of the sampling loop, where you feed back the
>previously sampled value to reduce the size of the settling step, is
>still very useful.
>
>Generally the cool thing about the old Tektronix was that they made
>fast, clean measurement tools using the same components everybody else
>had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
>amplifier, maximum-power point biasing(*), distributed deflection tubes,
>and on and on.
>
>Magic.
>
>Cheers
>
>Phil Hobbs
>
>(*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
Their differential comparator plugins (Z, W, 1Asomething) were
astounding. You could zoom the top of a 100 volt pulse to mV/div.
Here's the CRT from a 547:
https://www.dropbox.com/s/evoq6p2nvzyl6wo/547_crt.JPG?raw=1
It's a beautiful piece of glass.
This isn't as pretty. It's from the 519, the monster 1 GHz scope that
had no vertical amp.
https://www.dropbox.com/s/r6c3zkwlqrayt53/519_CRT.JPG?raw=1
I dug that out of an old scope, out in the rain, in a parking lot in
Los Alamos.
The horizontal deflection amp was a transmitting tube, a 2CX250 or
something.
Reply by Phil Hobbs●May 2, 20232023-05-02
On 2023-05-02 11:15, Fred Bloggs wrote:
> On Tuesday, May 2, 2023 at 10:39:46 AM UTC-4, Phil Hobbs wrote:
>> The Tek power supply thread reminded me of these interesting old
>> books, some of which are still an excellent read.
>>
>> https://www.davmar.org/concepts.html
>>
>> My fave is Bob Orwiler's Vertical Amplifiers Concepts,
>> <https://www.davmar.org/TE/TekConcepts/TekVertAmpCircuits.pdf>.
>>
>> (The Power Supply Circuits book is too old to be much use, though
>> it does talk about switchers a bit.)
>
> Dunno about those particulars, I don't think, but the older Tek
> documentation gave excellent illustrations of higher complexity
> electronic subsystems are conceived in the first place. They were a
> mix of electronic components and function blocks, the only way to do
> it.
>
The Sampling Oscilloscope Circuits one is also a very good read even
today--the notion of the sampling loop, where you feed back the
previously sampled value to reduce the size of the settling step, is
still very useful.
Generally the cool thing about the old Tektronix was that they made
fast, clean measurement tools using the same components everybody else
had. Stuff like the f_T doubler, constant-resistance T-coil, cascomp
amplifier, maximum-power point biasing(*), distributed deflection tubes,
and on and on.
Magic.
Cheers
Phil Hobbs
(*) As opposed to the modern approach, i.e. maximum PowerPoint. ;)
--
Dr Philip C D Hobbs
Principal Consultant
ElectroOptical Innovations LLC / Hobbs ElectroOptics
Optics, Electro-optics, Photonics, Analog Electronics
Briarcliff Manor NY 10510
http://electrooptical.nethttp://hobbs-eo.com