[GreenKeys] Baud rate change

[John, W9DDD]

Probably is still AC, at least that seemed more common in what Teletype 
supplied in later years.  Governed motors can be either AC or DC.

Page 208 (PDF 214) of TM 11-352 has some general information about 
differences between British and US standards circa WW2.  (Useful?)

https://www.radionerds.com/images/4/43/TM_11-352.pdf

---
----
The above comments or recommendations are SWAG. Use at your own risk.
John, W9DDD

On 9/1/2021 8:27 AM, steve bennett wrote:
> "I have to question that the 2,000 RPM motor is synchronous"
> 
> If it's not synchronous when is it a DC motor?
> That's even easier to control. Just vary the voltage.
> 
> -Steve
> 
> On Wednesday, September 1, 2021, 09:05:13 AM EDT, John, W9DDD 
> <w9ddd at tapr.org> wrote:
> 
> 
> I have to question that the 2,000 RPM motor is synchronous.  Therefore
> it is likely a governed motor which could be adjusted down to 1800 RPM.
> 
> Where's Henning, he is probably an expert on this if you can provide
> more details on the EU machine?
> 
> ---
> ----
> The above comments or recommendations are SWAG. Use at your own risk.
> John, W9DDD
> 
> On 9/1/2021 7:08 AM, steve bennett via GreenKeys wrote:
>  > Joe,
>  >
>  > The easiest way to change the speed is use a single phase variable speed
>  > inverter.
>  > This would require no modification to the teletype.
>  > 
> https://www.ebay.com/itm/121462713601?hash=item1c47bded01:g:HP4AAOSw8lxg7UK2
>  >
>  > This device takes 60Hz input and you set the output to any frequency you
>  > like.
>  >
>  > -Steve
>  >
>  >
>  > On Tuesday, August 31, 2021, 10:13:45 PM EDT, Joe Duszyński
>  > <joeduszynski1 at gmail.com <mailto:joeduszynski1 at gmail.com>> wrote:
>  >
>  >
>  > I have a European machine that runs on 220v 50hz and the motor speed is
>  > 2000 rpm.
>  > Of course on 60hz 220v it runs faster than 2000 rpm  I'm looking to
>  > change the motor to a DC motor but would also like to change the baud
>  > rate in the process to 45.5 vs the 50 it "was set at" the gear ratio
>  > appears to be 5 to 1  five revolutions of the motor to 1 rev of the
>  > transmitter/receiver shaft.
>  > Can this be accomplished by using an 1800 RPM motor vs 2000 RPM??
>  >
>  > This is the calculation I used to come up with 1800 RPM
>  > 22ms * 7.5 bits = 165ms
>  > 60000ms(in 1 minute)/165ms = 363.6363 RPM
>  > 363 RPM X 5(1:5gear ratio) =1818 RPM
>  >
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