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(Now needed for 15 Meter modification experimentation only)
Contact Bill's 2-way for the password
The original CHIPSWITCH IC was programmed to allow the use of 10 and 11 Meters. Addition of a password allowed the IC to also operate at 12 and 15 Meters (with the installation of a Low Frequency Kit). Testing showed that the radio was unable, however, to operate without a spur in the 15 Meter range, so the IC was re-programmed to operate from 10 through 12 Meters with a password required to open up the IC to 15 Meters. Work continued for a short time on the Low Frequency (15 Meter) Kit, but ended the first of 1993 by Chipswitch. Since then, a few passwords have been provided for additional experimentation. Some modifications need to be made to the PLL PCB in order to operate at 12 Meters and beyond. (See Rogerbird's 12 Meter Modification suggestions)
The following was the sheet that was to be provided for the first IC's. It gave instructions on how to program the radio for use at 12 Meters after the addition of the password. At that time, a password was needed to operate at 12 Meters and beyond. A password is no longer required to operate from 10 to 12 Meters.
Chipswitch 12 Meter Low Frequency Password
Chipswitch Chip Serial Number _________________________
Password Frequency ____________________
To "open up" your radio to 12 Meters, 24.8 MHz, perform the following:
Notes:
The following was the original instructions planned for use with the IC, assuming the IC would be workable at 15 Meters.
Chipswitch Low Frequency Password and Tuning Instructions
The Chipswitch IC allows you to set the lowest operational frequency (low limit) of your radio to the lowest frequency the PLL and R.F. pc boards in your particular radio are capable of operating at. This is generally 11 meters. With the addition of a 12 meter kit, the PLL will lock through 12 meters without a password. With the application of a password, the absolute lowest frequency programmed into the IC is 20.900.0 MHz. Few people have the skill, or adjustment equipment to modify and adjust the PLL and other radio components to achieve 12 meters, let alone 15.
Each radio will have its own lower limit because of minor differences in its components, and the tuning and/or modifications it may have had.
Typically, the low limit frequency should be set just above the lowest frequency your radio's PLL and RF chassis are capable of operating at. Determining this lowest frequency will require a little experimentation, so at first it is recommended that you "open" your radio to the 20.9 MHz limit and see how far down it can go. To do this, try transmitting (into a dummy load) just below the lowest frequency you know has worked before. If you get and "ERR 4" display immediately, or an "ERR 3" display after 20 seconds of transmit, this frequency is too low for the PLL to lock. In that case, move up a few Kilohertz and try again. If after 20 seconds you don't get and "ERR" display, move a few kHz lower and try again. By moving up and down and trying to transmit at different frequencies, you can determine how far the PLL board in your radio is capable of going. Then set the low limit to a few kHz above this frequency. (Note: You can change the low limit to a new frequency any time you wish in case you later decide to modify or tune you radio to go even lower).
As far as the RF chassis is concerned, with no tuning at all, your receive sensitivity should be acceptable clear down to 20.9 MHz (or as low as the PLL board will go) with no tuning required. Typically, the transmit power level will start dropping around 25.5 MHz and a good technician will be able to adjust the transmit mixer and bandpass filter coils to even out the power at the lower frequencies. If adjusted properly, the RF chassis is capable of both transmit and receive over the full 20.9 to 29.999MHz bandwidth with only a few watts variation in transmit power over that range.
Note that setting the low limit below the frequency the PLL board is capable of operating at is useless and will cause the SCAN and PRIORITY CHANNEL features to malfunction. Also, watch your SWR carefully at first because very few (if any) single antennas can operate properly over this range without an antenna tuner (trans-match).
_____________________ ____________________
To "open up" your radio below 25.5 MHz, perform the following:
Notes:
SERIAL NUMBER DISPLAY
To display the SERIAL NUMBER of the CHIPSWITCH IC, perform the following:
Enter the PROGRAM MODE. Hold the microphone in one hand and prepare the other hand to press the necessary buttons.
Step 1. Press the F.lock button in
Step 2. Press the CHANNEL UP and METER
buttons simultaneously
When the HR2510/HR2600/LINCOLN goes into PROGRAM MODE you are notified by "4 - beeps" and the BAND indicator will display a "P" indicating the radio is in PROGRAM MODE. In this mode, the METER display (RF, MOD, ^, SWR) will be blank. The CHANNEL NUMBER display will show "0" indicating the first enhanced FEATURE (BEEP ON-TIME) programmable by you. The FREQUENCY display will have the right-most digit (100Hz) illuminated with the default value for this FEATURE.
AFTER the first of the 4 'beeps', but BEFORE the end of the 4th 'beep', press in the microphone's PTT (transmit) button.
The chip's serial number will now be displayed for as long as you keep holding in the microphone's PTT button.
To exit the PROGRAM MODE:
Step 1. Press the F.lock button in
Step 2. Press the CHANNEL UP and METER
buttons simultaneously
The radio will "beep" once and return
to the OPERATE MODE.
