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On 2018-03-19 11:37 AM, Robin Birch wrote: > The way that these were made was that the drawing office would draw the lettering and markings for each colour. If all the same colour then one drawing.

Retirement works like that IN THEORY. IN PRACTICE it is somewhat different. I have been retired 9 years, 4 surgeries on my hands, 2 hernia repairs and 2 cancers, Kidney removal and partial lung

From what I've read, unsaturated cells have a short life, about 10 years, whereas saturated cells are almost immortal. (Voltage falls, and TC and hysteresis rise.) An old unsaturated cell meeting spec

Yes, I can remember doing that :-)

The way that these were made was that the drawing office would draw the lettering and markings for each colour. If all the same colour then one drawing. They may have been drawn larger than full size

OK great, a dead cap, hopefully that will fix it. As soon as it's replaced, measure the output of the voltage regulator tube, it's the most important thing, this thing is the reference ;-) Vince

It's the Copperplate typeface. Definitely not a stencil. The family has several members. https://www.myfonts.com/fonts/linotype/copperplate-gothic/ --Toby

Thanks Spin, It was crossing my mind to do something like that, but then, If I eventually make a board, I will build it the single-ended to balanced output converter directly onto it, connected as

Also back in the 80's I was developing pulsed solid state lasers at Southampton University in the UK, and the Q-switch (an electro-optic polarisation rotator) was fired using a krytron. The main

Technically we may be talking about the typeface, I think the font is the collection of all the elements that make up a given typeface (weight, style, width etc)? Other GOM* points: There have been

Back in the mid-80s I had some friends at Imperial College in the UK who started a company called Kentech. Their speciality was fast pulse generators that could switch around 2kV with a pulse duration

Not sure that this is actually a “font” it looks like one of the drawing office stencil or letraset ones used for this sort of thing back to the dawn of electronics Robin

I'm pretty sure it's Futura up to the late 1960s, then Univers after that. Chris <dennis@...> wrote:

Not sure it would simpler or cheaper to be honest - given the whole board is not much larger than the two relays anyway and, in mine at least, has only a couple of diodes and some .1" headers in

Is there room for a small daughterboard? That would be simpler than a whole new PCB.

Hi Brasscat, Yes but the duty cycle is infinitesimal. The pulse lasts less than 100nSec and it repeats every ~100uSec. So the ratio is at least 1:1000. That would make 5KW act more like 5W. But I

Guess I am real tired, how about 6.05KW

My goof! That's 5.5KW.

I guess the pulse is so short that you can get away with that, but during the pulse it's 550 watts. I was thinking a transmitter dummy load / attenuator to start with. Stan KO6YB

Hi Toby, Thank you, That is a very detailed list. Dennis Tillman W7PF