more SD-24 pics...

[John Larkin]

https://metebalci.com/blog/sd24/
--

If a man will begin with certainties, he shall end with doubts,
but if he will be content to begin with doubts he shall end in certainties.
Francis Bacon

 

[Dimiter_Popoff]

On 4/27/2022 0:54, John Larkin wrote:

https://metebalci.com/blog/sd24/

Can\'t think of anything else to say looking at these shots
but \"whoa\".

 

[John Larkin]

On Wed, 27 Apr 2022 02:37:26 +0300, Dimiter_Popoff <dp@tgi-sci.com>
wrote:

On 4/27/2022 0:54, John Larkin wrote:

https://metebalci.com/blog/sd24/

Can\'t think of anything else to say looking at these shots
but \"whoa\".

Imagine building and testing and repairing complex hybrid electronics.
Lots of wire bonds.

Just the engineering on that looks like, well, a lot of work. Probably
without Spice.

--

If a man will begin with certainties, he shall end with doubts,
but if he will be content to begin with doubts he shall end in certainties.
Francis Bacon

 

[Anthony William Sloman]

On Wednesday, April 27, 2022 at 10:29:13 AM UTC+10, John Larkin wrote:

On Wed, 27 Apr 2022 02:37:26 +0300, Dimiter_Popoff <d...@tgi-sci.com
wrote:
On 4/27/2022 0:54, John Larkin wrote:

https://metebalci.com/blog/sd24/

Can\'t think of anything else to say looking at these shots
but \"whoa\".
Imagine building and testing and repairing complex hybrid electronics.
Lots of wire bonds.

Just the engineering on that looks like, well, a lot of work. Probably
without Spice.

Spice has been around for a very long time. I first used it at Kent Instruments in Luton, around 1975.

The hermitically sealed device that John Larkin has called \"a large (I think Tektronix made) IC\" is probably a thick film hybrid. They were popular back then. You could wire bond discrete unpackaged transistors and FETs and get lower inductance connections between fast parts that way than you could with the packaged parts available back then.

https://www.littlediode.com/components/BFT95.html

I used the 5GHz BFT95 in its SOT37 package back then. We even published the circuit (at my co-authors insistence)

Ghiggino, K.P., Phillips, D., and Sloman, A.W. \"Nanosecond pulse stretcher\",Journal of Physics E: Scientific Instruments, 12, 686-687 (1979).

Tektronix would have been more ambitious.

--
Bill Sloman, Sydney