[GreenKeys] 120 VPS tuning forks available

[Ed Sharpe Archivist for SMECC via GreenKeys]

Jerry - - opps  ok that is the one  I will need!  Maybe  some  day I  will 
run across a 28  with a   governed motor.... or...   trade this one off   
for one I  need!
 
I wonder if  our model 31s   take the 87.6  VPS  fork also!?
 
Ed#
 
 
In a message dated 8/31/2014 11:18:12 P.M. US Mountain Standard Time,  
gfmurphy at earthlink.net writes:

Hi  Ed:

The governed motor for Models 14 and 15 typically turned at 2102  RPM.  
I've never had any reason to operate
a M14/15 governed motor so  I have no experience with them.  The only 
tuning fork that I've ever  heard being
used with the M14/15 governed motor is the 87.6 VPS  version.  I've used a 
120 VPS fork on a Model 28
governed motor and  they work as advertised.  See the attached sheet from 
TTY Bulletin 1147B  for a list of
all of the tuning forks and rotating targets that were  available.  Note 
that the 87.6 VPS fork is listed as the
Bell  standard.  The 87.6 and the 120 VPS tuning forks are the only ones 
shown  in the 1124B Maintenance
Tools book.

There is a bit of a learning  curve with using a shuttered tuning fork.  
The target must be brightly  illuminated.
Do not use an LED flashlight as they have a flicker rate which  will cause 
confusion.  Experiment with an
incandescent or electronic  fluorescent light source to get the best 
results.  Try holding the tuning  fork at
various distances from the target and your eye to get the best  results.

Jerry Murphy



-----Original  Message----- 
From: COURYHOUSE at aol.com 
Sent: Aug 31, 2014 8:56 PM  
To: gfmurphy at earthlink.net, greenkeys at mailman.qth.net 
Subject: Re:  [GreenKeys] 120 VPS tuning forks available  

I got  one Jerry -   thanks  for the  lead.   Question -   is this also  
good   for  the  model  
14  with  the   governed    motor also and others besides  the  28?
Thanks !  Ed#
 
 
In a message dated 8/31/2014 5:54:34 P.M. US Mountain Standard Time,  
gfmurphy at earthlink.net writes:


Greenkeyers:

There are 3 ea. 120 VPS tuning forks  available on that popular
internet auction website.  The price is  $12.99 ea. with free
shipping.  This is an essential tool if you  have a Model 28
governed motor.  No connection to the sale.   Here's the link:

cgi.ebay.com/231011137528

Jerry  Murphy



















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