[Premium-Rx] W&G BANDSPERRE HF BANDSTOP FILTERS

[pat1mca at aol.com]

Greetings to List Members,
After over a year of searching I am still trying to find any HF Bandsperre Bandstop Filters made by Wandel & Goltermann for their RK-50 or RK-25 White Noise Measuring Setup.
In particular I am looking for the 3886kHz Bandstop Filter Plug In marked Bandsperre  Type  RSS-3886  Part No BN 726/10 or BN 726/60 to allow measurement of older Ham Bands only receivers.
If I had a circuit diagram I could make one, difficult but not impossible.

If anyone can assist please contact offline.
Keep safe,
Pat G3YFK