[Premium-Rx] AEG TELEFUNKEN PRESELECTOR ES1700 INFO WANTED

[Pat1McA at aol.com]

Greetings to Members,
 
I am looking for a circuit diagram for the ES1700 Preselector and would be  
most grateful if you would contact me off - list with any  information.
 
Also, I am trying to find what the exact differences are between  the 
(later?) ES150/2 and the (earlier?) ES1700.
 
My E1800/3 has a second function "PRESEL" on the "ANT" button which I  
suspect switches the ES150/2 in or out of circuit.
 
The ES1700 stays in circuit all the time and I wondered if this should  
also switch in or out when I execute Programming  Pr16 and 17 or use  the 
"PRESEL" button.
 
When using the Program commands a letter "P" indicates in the  Tuning 
display presumably indicating the activation or bypass of the  preselector, which 
I think will work with the ES150/2 but not with the  ES1700?
 
Many thanks,
 
Pat G3YFK