[Premium-Rx] TELEFUNKEN ES1700/2 PRESELECTOR INFO REQUESTED

[Pat1McA--- via Premium-Rx]

Greetings to All List Members,
 
Can any AEG/Telefunken  E1700, E1800 or E1800/3 HF receiver  owner advise 
me please?
 
When using the later model Preselector, ES1700/2, in the  "Preselector 
Out/Bypass" mode do the Bandpass relay switches still operate or  are they 
actually inhibited from operation?
 
In the earlier model, ES1700, the Bandpass relay switches operate all  the 
time above 1.6MHz as they track the tuning up and down the HF Bands.  There 
is no facility to bypass the Antenna input to output or to stop the relays  
switching, which eventually wears the Teledyne relays out..
 
Whereas, in the ES1700/2, there is a logic input to switch the  Preselector 
in and out of the RF path.
 
But does it also inhibit the relay switching at the same time?
 
The later (and hideously expensive) ES150/2 Preselector had the best of  
both worlds. It had Bypass and only activated the Bandpass switching when  
slow tuning was used to save wear on the relays.
 
To complete my E1800/3 module collection I am looking for an ES150/2  - 
please contact offline.
 
May I also take this opportunity to wish all members a healthy and  
successful 2015.
 
73 de Pat G3YFK