[GreenKeys] Re: GreenKeys Digest, Vol 10, Issue 14

[wa2hwj at att.net]

Jan,

There are two very useful books on Ebay right now:
"The New RTTY Handbook" and "RTTY A-to-Z". 
Get them.....they'll answer 99% of your questions.
List "teletype" or "rtty" on the Ebay search.

Jack



-------------- Original message from Wndrrt at cs.com: -------------- 


> Hello group, Jan Bogue the beginner here one week in: 
> 
> Thanks, Jack, Gil, Don,Rick, Mike and Richard 
> 
> Here are some things that I have learned about the 19 set this week: 
> 
> The gear on the far right end of the horizontal shaft is marked 74913. The 
> gear on the motor (synchronous motor) is marked 74912, and the gear on the 
> keyboard shaft is numbered 74595. All this makes me think that the machine will 
> work at 60 wpm. 
> 
> Here is a long one. The terminal block seen from the back and above the 
> selector square core HM magnet has three strips and six screws (no switch). The 
> center two are not used. An orange and black wire goes to the lower left screw 
> and a red and black wire goes to the lower right screw. Two resistors are 
> placed across the top outer screws, but they don't add up to 5000 ohms. I am 
> sending a picture to Gil showing this wiring configuration. The question will 
> be: Do I need to set the HM up for series or parallel, to provide 30 or 60 mil 
> operation? 
> 
> >From what I can tell the Polar Neutral Key and wiring has been removed. I 
> also think the polar relay has been removed. The pictures that I send to Gil 
> will confirm this. 
> 
> Here is a good question: I keep hearing the phrase "polar magnets." There is 
> a shaft going from front to back of the keyboard behind the keys. This is 
> the one with the gear at one end labeled 74595. Now this shaft spins what the 
> book calls the transmitter mechanism. When you push a key, this shaft and odd 
> collection of washers spins and stops. Now, does this thing make the pulses 
> in much the same way as the TD reads the tape and makes pulses. Is this think 
> the "polar magnets?" 
> 
> I have printed out and put together several wiring diagrams. Using colored 
> pens, I have outlined the loop as it goes through the components. I am sure it 
> will get clearer, but would the terminal unit and power supply be plugged 
> into the machine through the original phone female receptacles behind the table 
> and on the power plug in strip with all the odd receptacles? I am a little 
> lost as to where to start the loop. I would like to keep the TD and the 
> keyboard 
> in the loop. All the factory wires are in place. If they had been all cut 
> from the printer, the loop would seem easy, I guess. 
> 
> I have been reading the sections on RTTY in my Ham Radio hand books, the 
> older versions. I have a Heath Kit B+ regulated power supply from the 60s. 
> With 
> a resistor, I think it would work as a quick test, loop power supply. 
> 
> More to learn this week. Thanks for all your help 
> 
> Oh yes, for the more advanced members, please design a little holster or 
> stand which can be mounted to the right of my 19 set where I can slide in my 
> cell 
> phone and type to my friends. Please include a small push up tower and 
> matching beam antenna. The cell phone set should be finished in black wrinkle 
> paint 
> with gray and keys green trim. 
> 
> Thanks all, Jan on the warm again desert in southern cal. 
> 
> 
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