[IRCA] Kaito WRX911 (and variants) AM Band Frequency Coverage

[D1028Gary@xxxxxxx]

Hello All,
 
The interest in the superb Kaito WRX911 analog Ultralight radio  (and its 
much cheaper Tecsun R911 and R9012 variants) has certainly been  booming among 
the enthusiast group, leading to questions overseas about  extending the 
frequency coverage of 520-1610 kHz models to cover the entire X  band. Actually, this 
will also probably be an issue for North American  purchasers of the least 
expensive R911 and R9012 models from China, via  eBay sellers "dpmega" and 
"tquchina."
 
Like my unit from Amazon.com, all Kaito WRX911 units sold in North America  
should already have the frequency coverage set at 520-1700 kHz. Purchasers of  
these units need only to perform a standard alignment (loopstick coil and  
1400 kHz trimmer peak) to ensure optimum performance.
 
WRX911 units sold outside of North America probably have the upper limit  set 
at 1610 kHz, since the X band is typically not used for broadcasting in  
those countries. WRX911 models can certainly be tweaked to cover the X band if  
necessary, just as the SRF-59 models set at the 1610 kHz upper limit have been  
routinely adjusted to cover up to 1700 kHz in alignments here (for Rick Reale 
in  New Zealand, and others).
 
Concerning the Tecsun R911 and R9012 models from the Chinese eBay sellers  
(which almost certainly have AM coverage set at 520-1610 kHz), it is  highly 
likely that these also can easily be extended to 1700 kHz. Since I  have yet to 
receive my own models from China, a detailed procedure for  accomplishing this 
cannot yet be promulgated, but the adjustment involves  tweaking a trimmer on 
the tuning capacitor to extend the upper limit, as well as  tweaking a slug on 
an inductive adjustment to maintain the lower limit at  520 kHz. In multiple 
alignment on analog AM receivers, I have yet to see an  analog model which 
could not be tweaked this way-- even the venerable Sony  ICF-S5W has been easily 
adjusted to cover the X band, in multiple  alignments here.
 
Purchasers of the ultra-cheap Tecsun R911 and R9012 models should have  no 
problem enjoying thrilling DX on the X band, once the frequency  adjustment and 
alignment procedures are drafted, and promulgated. In the  meantime, feel 
confident to invest around $15 without further concern  :>)
 
73, Gary DeBock 
 
 
     
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