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The F-35: Mediocre at Everything and Expensive as Hell


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#61 Traveler

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Posted 18 June 2019 - 09:32 AM

Interesting thread. At least as far as I can understand. My last electronics was when I designed my own Ham radio transmitter. Still have the thing in my basement. Was such an idiot, I reversed PS polarity. Couldnt figure out why the scope response was downward. Until I touched both the scope and transmitter and closed an 800VDC circuit. blew me backward off the chair and down the hallway into the computer room. Thank god it wasn't AC.
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#62 George Rowell

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Posted 18 June 2019 - 08:14 PM

View PostTraveler, on 18 June 2019 - 09:32 AM, said:

Interesting thread. At least as far as I can understand. My last electronics was when I designed my own Ham radio transmitter. Still have the thing in my basement. Was such an idiot, I reversed PS polarity. Couldnt figure out why the scope response was downward. Until I touched both the scope and transmitter and closed an 800VDC circuit. blew me backward off the chair and down the hallway into the computer room. Thank god it wasn't AC.
KT66 and 6L6 sort of ring a bell.. I still remember the physics masters call ham sign G3BHF. Never made a TX but did make an oscilloscope centered around a WW2 tube era, the BP3. Loooong time ago. That teacher would be 120 yro now.
A doctor knows a little about a lot. A specialist knows a lot about a little. In time the doctor knows less and less about more and more and the specialist knows more and more about less and less until ultimately the doctor knows nothing about everything and the specialist knows everything about nothing.

#63 Rich T Bikkies

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Posted 19 June 2019 - 02:18 AM

View PostGeorge Rowell, on 18 June 2019 - 08:14 PM, said:

KT66 and 6L6 sort of ring a bell.. I still remember the physics masters call ham sign G3BHF. Never made a TX but did make an oscilloscope centered around a WW2 tube era, the BP3. Loooong time ago. That teacher would be 120 yro now.

I'm struggling to synthesise a constructive comment on this thread . . . wait a moment . . . Ah! "This could all be worse: it might have been economics!". Sorted.
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#64 George Rowell

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Posted 19 June 2019 - 03:56 AM

View PostRich T Bikkies, on 19 June 2019 - 02:18 AM, said:

I'm struggling to synthesise a constructive comment on this thread . . . wait a moment . . . Ah! "This could all be worse: it might have been economics!". Sorted.
To be honest with you Bikkie, if you understand this you have got to be long in the tooth anyway. Much older than that flattering photo you display.
A doctor knows a little about a lot. A specialist knows a lot about a little. In time the doctor knows less and less about more and more and the specialist knows more and more about less and less until ultimately the doctor knows nothing about everything and the specialist knows everything about nothing.

#65 D. C. Sessions

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Posted 19 June 2019 - 07:04 AM

View PostGeorge Rowell, on 18 June 2019 - 08:44 AM, said:

I recently looked into FPLAs to build a pulse metal detector, mainly to control an external high speed A/D after coming up against the inadequacies of the internal AD's on the cortex M4. The biggest name in metal detectors uses FPLA's too. My whole life I have been fighting that damned noise floor, but it is mentally rewarding too.

That noise floor is why JESD204. Yes, I have fingerprints on that standard.
The way a lot of catastrophes happen is that X doesn't occur because there are safeguards in place, therefore people assume X isn't a worry and they remove the safeguards. Then X happens.
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#66 D. C. Sessions

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Posted 19 June 2019 - 07:07 AM

View PostGeorge Rowell, on 18 June 2019 - 08:14 PM, said:

KT66 and 6L6 sort of ring a bell.. I still remember the physics masters call ham sign G3BHF. Never made a TX but did make an oscilloscope centered around a WW2 tube era, the BP3. Loooong time ago. That teacher would be 120 yro now.

I never did do much with tubes -- my father taught radio to airmen in WWII and told me not to waste my time on them. He was right, transistors in small numbers and large have been paying the bills for 50 years now.
The way a lot of catastrophes happen is that X doesn't occur because there are safeguards in place, therefore people assume X isn't a worry and they remove the safeguards. Then X happens.
— Nate Silver
"Robots aren't the problem. Capitalism is." -- Last words of Stephen Hawking.
These days, "libertarian" is just a euphemism for a Nazi who's afraid to commit.
"If you're not outraged, you're not paying attention." -- Heather Heyer
"I'd rather have my child, but by golly, if I gotta give her up, we're gonna make it count." -- Her mother
"Your purpose, then, plainly stated, is that you will destroy the Government, unless you be allowed to construe and enforce the Constitution as you please, on all points in dispute between you and us. You will rule or ruin in all events." -- some RINO

#67 George Rowell

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Posted 19 June 2019 - 07:41 AM

The transition from tubes to transistors was already made when I started work, but what a mix. There were GET1, XA101, OC70 but also BFY90 and 2N3866. They are still available today 50 yrs on. Enjoyed my time at GEC but I will always remember the jelly. I ordered sweet and one of the canteen staff plumed my jelly down and it was swaying. The guy on the left said that's due to Young's modulus and the guy on the right said it had got a high refractive index too. The waitress started looking worried and offered to replace it with another. Happy stupid days.
A doctor knows a little about a lot. A specialist knows a lot about a little. In time the doctor knows less and less about more and more and the specialist knows more and more about less and less until ultimately the doctor knows nothing about everything and the specialist knows everything about nothing.

#68 D. C. Sessions

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Posted 19 June 2019 - 08:03 AM

View PostGeorge Rowell, on 19 June 2019 - 07:41 AM, said:

Enjoyed my time at GEC but I will always remember the jelly.

Huh. How's 'bout that -- I worked for GEC (in the guise of Marconi Instruments) in the mid '80s.
The way a lot of catastrophes happen is that X doesn't occur because there are safeguards in place, therefore people assume X isn't a worry and they remove the safeguards. Then X happens.
— Nate Silver
"Robots aren't the problem. Capitalism is." -- Last words of Stephen Hawking.
These days, "libertarian" is just a euphemism for a Nazi who's afraid to commit.
"If you're not outraged, you're not paying attention." -- Heather Heyer
"I'd rather have my child, but by golly, if I gotta give her up, we're gonna make it count." -- Her mother
"Your purpose, then, plainly stated, is that you will destroy the Government, unless you be allowed to construe and enforce the Constitution as you please, on all points in dispute between you and us. You will rule or ruin in all events." -- some RINO

#69 George Rowell

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Posted 19 June 2019 - 08:20 AM

View PostD. C. Sessions, on 19 June 2019 - 08:03 AM, said:

Huh. How's 'bout that -- I worked for GEC (in the guise of Marconi Instruments) in the mid '80s.
GEC Hirst Research Center Wembley. Ha. But a decade and some earlier than you.
A doctor knows a little about a lot. A specialist knows a lot about a little. In time the doctor knows less and less about more and more and the specialist knows more and more about less and less until ultimately the doctor knows nothing about everything and the specialist knows everything about nothing.





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