Need the Grundig YB-400 Service Manual.

Some of the manuals I have for exchange......

Service Manuals

Panasonic RF-2200
Sony 2010 Schematic
Sony SW-77
Sony ICF 7600
Zenith Royal 1000
Icom R-71A
Sangean ATS-818
Realistic DX-302
Realistic DX-160 Schematic/Operate
GE SR3
Yaesu FRG-7700
Yaesu FRG-7 Schematic
Kenwood R-5000

Many operation manuals:
Drake SW-8A/B ... R-75
Icom
Kenwood
Panasonic 4900, 2200 etc
Zenith
NRD 545
ETC