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QRZ! Ham Radio 18
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QRZ Ham Radio Callsign Database - Volume 18.iso
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c628a.txt
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2001-11-01
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Subject: STANDARD RADIO C-628A 440 / 1200 MHz Radio Modifications
(Many thanks to JI1AZI, Kazumi Nakagawa, for translation assistance)
Receive Expansion Mod:
Expands RX coverage to:
320 - 480 MHZ
820 - 980 MHz
1220 - 1400 MHz
1. Reset Radio by pressing the small indentation on RHS of radio.
2. Press "450" key
3. Press Funct and 0 (Set)
4. Press Funct and D (Ent)
5. Press the PTT switch
6. Press "1200" key
7. Press Funct and L (Lamp)
8. Press Funct and 0 (Set)
9. Press Funct and B (Code)
10. Press Funct and L (Lamp)
11. Press Funct and 3 (PO)
12. Press the PTT switch
This completes the RX expansion mod. To select the frequency
ranges within a band, press Funct and 0, then Funct and 3.
The 440 MHZ band will alternate with the 320 MHz band. On the
1200 MHz band, the ranges will cycle 1200, 1300, 800, 900 then
back to 1200 MHz.
Now, for the TX expansion mod. This should be done after the RX
mod has been performed.
1. Press "1200" key
2. Press Funct and B (Code)
3. Press 5 (Save)
4. Press 2 (Dual)
5. Press 0 (Set)
6. Press "450" key
7. Press Funct and B (Code)
8. Turn Rotary Channel Selector Knob to Ch. #3
9. Press 6 (Step)
10. Press 2 (Dual)
11. Press 0 (Set)
12. Press Funct and 4 (FL/DM)
13. Press Funct and "450" key
14. Press Funct and 0 (Set)
15. Press Funct and D (Ent)
16. Press the PTT switch
When properly completed, this will expand the TX coverage to
400 - 474 MHz and 1220 - 1340 MHz.
I tried this on a C628A, and it works as shown.
Ed Brown KB1MZ