| Author |
Message |
    
Hurricane
| | Posted on Saturday, December 01, 2001 - 8:14 am: | 
|
i found this on another website and was wondering if anyone has tried this modification and had any luck with it?
Albrecht SS485, Radio Shack TRC-485, Dragon TRC-485
--------------------------------------------------------------------------------
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 28), 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
To transmit / receive on all of the 400 channels it is necessary to adjust the VCO. |
|
