[GreenKeys] Model 33 repairs (a bit OT)

[Adrian Rawlings]

Ed, it is /really/ interesting to see all these units in operation.

What is fascinating is, when looking at the equipment, that all the ideas were there but that they had to use the prevailing technology to implement them. There's a height-finding display, for example, where the echo return from a downward-pointing antenna is displayed on a screen. It uses a marker blip controlled by an external knob to measure the height, and the calibration on the knob is how the height information is obtained. Nowadays, the kit would be filled with A-to-D converters and processors to do the measuring for you and display the data on a head-up display. But the idea was there in the first place.

Did you visit Norman's website? It gives a lot more details on the various exhibits within the cockpit.

http://website.lineone.net/~norman.groom/

Getting back to the original purpose of this posting, is there a Greenkeys reader who may be able to help with Model 33 problem? I don't think anyone has monkeyed around with the '33 particularly, and I suspect that the printer part of the machine is working but for some small detail. Is there some lever inside the mechanism that's in the wrong position, or does the input pin have to be in the Mark state, or ... 

I don't know the answer, but is there a reader on this list who is thinking as he reads this, "I bet I know what it is. He hasn't indexed the gudgeon pin to TDC". (I'm not fluent in TTY argot, but I've met people who are, so I've synthesized this :-)

Adrian
m0ans

>From: Ed Tanton n4xy at comcast.net
>Date: 21/09/2012 18:34
>Subject: [GreenKeys] Model 33 repairs
> What an awesome exhibit Adrian!!!
>  
> Ed Tanton
>  
> website: http://www.n4xy.com