[Milsurplus] Can you recognise this item?

[Bob Camp]

Hi

By far the largest number of mechanical analog computers were things  
like bomb sights, autopilots, and gun stabalizers. Tight tolerance  
machines.

Analog computers were alive well into at least the 1980's. The fire  
control on the M1 Abrams tank is one example of an analog (op amp and  
capacitor) computer. We were still shipping them in 1987.

500 Hz is way high frequency for any of that stuff ....

Bob


On Dec 27, 2007, at 6:29 PM, J Forster wrote:

> IMO, no. Analog computers are of two types:
>
> Those using servomechanisms (synchros, servos, cams, gears, motors,  
> and
> gyros). These generally implement trig problems like fire control or
> guidance. Examples are the SCR-584 links to AA guns and the gun laying
> computers used on battleships.
>
> Those using DC circuits like operational amplifiers, made by companies
> like G.A. Philbrick and EAI. These are typically used for simulating
> dynamic systems, like aircraft dynamics to test attitude controls.
>
> I can think of no reason why either would use frequencies above audio.
>
> Best,
> -John
>
>
>
> Hue Miller wrote:
>
>> Analog computer wouldn't have swept tuning
>> capacitors, would it? -Hue
>
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