[IRCA] Tecsun PL-300WT & Grundig G8 AM Alignment File

[D1028Gary@xxxxxxx]

Hello All,
 
As mentioned in previous posts, the new DSP-enhanced Tecsun PL-300WT and  
Grundig G8 Ultralight radios have introduced outstanding selectivity to the  
pocket radio class, as well as unprecedented FM sensitivity. User reports 
have  been full of praise for both models, especially regarding FM performance.
 
Unfortunately, due to some production shortcuts at the Tecsun factory, the  
AM sensitivity in many models has not been optimized-- a procedure which  
requires matching the inductance of the loopstick coil to the value required 
by  a varactor component in the DSP chip. Whereas some users have been 
satisfied  with AM sensitivity in these units, others have not. The only way to 
ensure  optimal AM sensitivity is to perform an alignment of the loopstick 
coil, to  optimize the inductance match with the varactor.
 
A file describing this alignment procedure has been uploaded to dxer.ca,  
and to the Ultralightdx and ODXA Yahoo group sites. The procedure is  
recommended for experienced hobbyists, and requires detail work and (typically)  
some patience. The benefit in weak-signal performance is worth it, however,  
as optimum AM sensitivity is combined with DSP-enhanced selectivity to 
provide  the best possible DXing capability in the stock Ultralight radio  class. 
Good luck!
 
73, Gary DeBock (in Puyallup, WA)
 
 
        
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