This is from my site, the mod looks exactly the same as from your site, the mod shown below originated at my site, a member of my site sent it to me in spanish, which I had to try and translate into English,.
I do not know if you got it from there or from somewhere else, if it came from my site I would appreciate credit for it (by way of a link), if not I would like to know where you found it, thank you.
Albrecht SS485, Radio Shack TRC-485, Dragon TRC-485
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The mod was translated from spanish, there may be errors in the translation, once I worked out how this mod worked I changed some of it to make it easier.
The mod is to increase the amount of channels of the Albrecht SS485,Dragon TRC-485 or Radioshack TRC-485 that originally comes with 40 channels from 26.965 to 27.405.
The mod is to alter the pins of the 80 pin microprocessor (Albrecht SS485=SY202, Dragon TRC-485 = SY201, Radioshack TRC-485 = HYU4011Q06 FP), so that the pins where either disconnected from the circuit (open) or connected to the circuit (close), from pin 31 (open), pin 32 (open), pin 33 (open), pin 34 (close) the radio then had 400 channels of transmission/reception.
To control the bands you must touch pin 3 of the CPU with pin 29 for one second.
You can re-wire the NB switch to do this (the NB button is connected between pins 3 and 2<img src=http://www.ezboard.com/intl/aenglish/images/emoticons/glasses.gif ALT="8)"> , this is easy to do, locate the track for pin 28 on the CPU, cut it and jumper the track (on the NB side not the CPU side) to the track for pin 29.
When you press the button it will change bands as listed below.
25.165-25.605
25.615-26.055
26.065-26.505
26,515-26,955
26,965-27,405
27,415-27,855
27,865-28,305
28,315-28,755
28,765-29,205
29,215-29,655
The Defpom
www.radiomods.co.nz/
www.TheDefpom.com
www.radiodiagrams.com</p>
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