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Hi All,
Does anyone have any experience of working on this radio, its the small Grundig with a leather case designed by F.A. Porsche.
I have recently repaired one with corroded battery contacts which had obviously not worked for many years.
Its now working perfectly on FM, but MW and SW1 and SW2 have no reception, just noise.
If I leave the radio connected to a 5v power supply for many hours it does actually get some reception on AM, but its not consistent. I'm thinking the fault is somewhere in the 'front end', oscillator stage perhaps.
I have checked the AM coils and wave selector switch are OK and everything is visually in excellent condition. 
Reading various reviews on this radio confirms they were sold very cheaply in the USA and many customers have complained there is little or no sensitivity on AM, whilst others say it works perfectly. This makes me wonder if there is a common fault on these which someone may know, before I start with my test equipment to try to find the problem...

Any advice would be much appreciated!  
 

Üdv Végfokot cseréltem benne most kiderült a tunerja fm-en nagyon gyenge. Lenne valakinek bontott hozzá? Balázs

Hozzájutottam a címben szereplő készülékhez. A hangja is elfogadható. Kapcsolási rajz beszerzéséről infót szívesen elfogadok ( plosza@freemail.hu ).

Szép napot mindenkinek ! Egy gyári Wolswagen hangfal, /aktiv/ bekötésére lenne szükségem. Ez van rajta, WW ISOPHON 867 035 403 . Úgy kaptam , elég izmos cuccnak néz ki ,szétszedni sem lehet, csak ha roncsolom . Infót nem igen találtam róla, egy kis HELP jól jönne ! Előre is köszönöm .