[GreenKeys] [Possible Forgery] Re: Odd Model 15 gears

[Sheldon Daitch]

Ding, getting even more senile.....that AP document regarding gear change
was from Jim Haynes.

73

Sheldon

On 5/31/2011 1:52 PM, Sheldon Daitch wrote:
>
> Way back, maybe the early 1970s, the AP increased the operating speed of
> the M-15 and M-20 machines.
>
> One of our forum members posted an AP document detailing the step-by-step
> instructions so the subcribers could change the mainshaft and motor
> gears hopefully
> without the assistance of the AP techs.
>
> I don't have access to any of the documentation that I used way back when I
> really did get a pay check from the AP, but I think the speed bumped up
> from 60WPM
> to 66WPM or thereabouts.
>
> The AP used the same gear combination for both the M15 and M20 machines,
> no doubt
> to minimize the gear and motor combinations in the field.  Since the M20
> machine is a
> six-level coding, the actual data rate for the M20 is slightly higher,
> as one more information
> pulse is required for each machine function, even though the main shaft
> speeds are the
> same.
>
> I just don't remember the PCB for the M20.  Maybe I just didn't pay any
> attention to it,
> but forgive me, it has only been 33 years since I saw a M20 TTY.
>
> 73
> Sheldon
>
> On 5/31/2011 5:41 AM, DR HOUSE wrote:
>    
>> Yes Jim,
>>
>> The same gears are on my AP M20.  I think they are to run the machine
>> at a faster speed, how fast I do not know.
>>
>> I have not been able to find a reference for these gears, nor has
>> Riceguy.
>> Another odd thing about this M20 is the printed circuit board that feeds
>> the selector mechanism.
>>
>> Someone out there that worked for AP might be able to help us.
>>
>> Don
>>
>> On 30 May 2011, at 8:54 PM, Jim Haynes wrote:
>>
>> I have a former Associated Press Model 15 with sync motor.  The motor
>> pinion is 114460 and the driven gear is 114461.  I haven't found these
>> in any of my parts books or gear charts.  Anybody know what they are?
>>
>>
>> ______________________________________________________________
>> GreenKeys mailing list
>> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
>> Help: http://mailman.qth.net/mmfaq.htm
>> Post: mailto:GreenKeys at mailman.qth.net
>>
>> This list hosted by: http://www.qsl.net
>> Please help support this email list: http://www.qsl.net/donate.html
>>
>>      
> ______________________________________________________________
> GreenKeys mailing list
> Home: http://mailman.qth.net/mailman/listinfo/greenkeys
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:GreenKeys at mailman.qth.net
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html
>