[Healeys] HF1746/47/48 horns assembly

[Bob Spidell]

Been a while since I worked on horns, but IIRC: 

- the vibrations needed to produce sound are produced by points--not dissimilar to the ones in the distributor--that open and close rapidly to vibrate a voice coil, i.e. a 'speaker' 
- the points gaps need to be set (just like the points in a distributor) 
- the gap is measured in inches ("ins.") 
- so, the gap for one of the horns (you listed "High Note" twice) would be 0.019-0.022 inches--i.e. from 19 thousandths of an inch to 22 thousandths of an inch 
- again, working from memory, but there must be a set screw or something to limit the travel of the points arm to within the spec 

Cheers, 
Bob 

-------------------------------- 
Bob Spidell - San Jose, CA 

----- Original Message ----- 
From: "Tadeusz Malkiewicz" <tadeusz.malkiewicz at plusnet.pl> 
To: healeys at autox.team.net 
Sent: Wednesday, January 20, 2010 8:46:50 AM GMT -08:00 US/Canada Pacific 
Subject: [Healeys] HF1746/47/48 horns assembly 

Hello, 

I am trying to understand the Workshop instructions for the horns and have a 
small problem - what is AIR GAP SETTING? And what are the following values: 
High Note 0.019-0.022 ins. 
High Note 0.024-0.026 ins. 

What are "ins."? 

I do understand how to regulate it, but what are these values?? 


Best, Tadek 
_______________________________________________