Although I've been itching to get my hands on the Tecsun R-9700DX, I wasn't really aware of it's smaller sibling, the R-9710 until I saw this review on the Two Hands and a Radio YouTube channel.
Two Hands made the observation that the shortwave bands tune in the opposite direction to the AM and FM bands, which made me go and do a quick check other Tecsun analog radios. I found the R-9700DX also has this inverted tuning feature so some Googling later and I've located a teardown of the R-9710 plus other sets. The original article is in Chinese but you can view it through the magic of Google Translate.
Note it has eight crystals around the bandswitch for that fixed-crequency first local oscillator.
Add the schematic found at http://www.fmdiy.com/ReadNews.asp?NewsID=305
Two Hands made the observation that the shortwave bands tune in the opposite direction to the AM and FM bands, which made me go and do a quick check other Tecsun analog radios. I found the R-9700DX also has this inverted tuning feature so some Googling later and I've located a teardown of the R-9710 plus other sets. The original article is in Chinese but you can view it through the magic of Google Translate.
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| R-9710 teardown from http://www.leowood.net/sbdp209.htm |
Add the schematic found at http://www.fmdiy.com/ReadNews.asp?NewsID=305
More dead links to maintain unfortunately.
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