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INGELEN 640W TUBES RADIO SCH

AUDIO - SERVICE MANUAL
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AUDIO
SERVICE MANUAL
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    INGELEN TUBES RADIO 640W 640
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Relevant AUDIO forum topics:
Orion HS280 magashangsugárzóba pillét keresek
Üdv,, Orion HS280/500 magas hangsugárzóba keresnék 8 ohmos pilléket, esetleg szakadt leégetett aminek a műanyag teste ép.
Grundig YB-P 2000 not working on AM bands
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!  
 
Marantz 2226B végfokok torzak, halkak Megoldva!
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YAMAHA RX-V1600 Erősítő nem kapcsol be.
Üdv. Mindenkinek! Fent nevezett erősítő nem kapcsol be. Készenlét nincs. A bekapcsoló gombot megnyomva két(gyors egymásutáni)relé kattanást hallani.Passzív méréssel a tápban és a végfokban a félvezetők és a passzív alkatrészek jónak tünnek. Jó lenne hozzá a frissítő szoftvert: DSP_FLASHER Vx600 letölteni,de nem találom sehol sem. Kellene valamilyen segítség vagy tapasztalat. üdv.
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