- #ICOM 756 PRO II CHANGES MODE IN TRANSMIT HOW TO#
- #ICOM 756 PRO II CHANGES MODE IN TRANSMIT PDF#
- #ICOM 756 PRO II CHANGES MODE IN TRANSMIT MANUAL#
- #ICOM 756 PRO II CHANGES MODE IN TRANSMIT PRO#
- #ICOM 756 PRO II CHANGES MODE IN TRANSMIT MODS#
They plug directly into the transceiver's microphone jack and receive power from the transceiver. In addition, they provide a pulsed, sine-wave oscillator for the tuning of high-powered amplifiers and antenna users and an alternate audio input is provided that can be used for a microphone. Pressing one of the four buttons on the i-Mates transmits the message associated with that button. They eliminate the need to shift the display from an operating mode to a memory select mode simply to transmit the prerecorded message.
#ICOM 756 PRO II CHANGES MODE IN TRANSMIT PRO#
The BetterRF Company i-Mate transceiver memory controllers implement the external selection of pre-recorded voice and keyed messages for the IC-7800, IC-756 PRO II/III, and keyed messages for the IC-746 PRO. Product Line: The BetterRF Company i-Mate Transceiver Memory Controllers with self-gluing capton tape near MP1.Part Type: Transceiver Memory Controllers The longer one (TX/+12V) should be fixed, e.g. For TX/+12V and RX/RF use some short and isolated wires. Both ground connections can be re-used from the SO-239 solder point. The relais (use one w/o free wheeling diode) must be mounted on the top side because there’s not enough room underneath (metal sheet cover of the tuner). Also, be very cautious with the three printed flex cables. For removing the CONTROL UNIT one has to de-solder both SO-239 connectors from the PCB. Remove the top lid, detach the speaker cable and remove a second internal shielding lid. The best place for this patch-relais is directly on the CONTROL UNIT. For here a tiny reed-relais can add up several tens of dB decoupling. adding a short circuit for the ports in off-conditions. But there’s also a fourth method iv) that is both most effective and simple:Īs known from VHF/UHF antenna relais technique one can achieve huge decoupling values when earthing unused pins, i.e. Their cure effect, and worse their side effects too, are hard to estimate. A third method iii) is to increase the input damping of the final amp (there’s already a 3R-pi input attenuator). Two alternatives curing this ICOM implied design flaw are i) replacing the antenna relais and ii) replacing the decoupling diode by a better one. Even the antenna tuner changes the phase relation and can cause several go/no-go situations. These instructions will detail setting the SSB Bass and Treble audio settings as well as setting the Transmit Band Width in Wide, Mid and Narrow.
#ICOM 756 PRO II CHANGES MODE IN TRANSMIT HOW TO#
When one of the attenuators is on (for sure not the default for 6m!) the decoupling might be ok. ICOM IC 756 PRO 3 Initial Audio Settings I have created these instructions to assist when an operator is unsure of how to initially adjust the IC 756PRO3 audio. Depending on part tolerances the IC-756 oscillates on 6m or does not. R is the proper adjustment point but you need to make sure you follow the proper procedure per the service.
#ICOM 756 PRO II CHANGES MODE IN TRANSMIT MANUAL#
You have to look in the service manual to find out what number is correct. There are only numbers marked on the board. Looking on Main board for the tiny potentiometer at the bottom side of the transceiver. On 6m the decoupling of both the antenna relais and the decoupling diode D131 is no more sufficient. Icom IC Mods.Open the bottom lid of the radio. Hereafter the RX path joins the TX small signal route via IC151 to the final amp. This is caused by a loop-back from the antenna relais (TX/RX decoupling) via the RF board, passing the persistently switched input attenuator (2 relais) and the RX/TX isolator diode D131.
Some IC-756PRO (-2) tend to oscillate on 6m. Icom IC-756 PRO II (IC 756 PRO II IC756PROII) technical specifications Icom IC-756 PRO II (IC 756 PRO II IC756PROII) technical specifications :
#ICOM 756 PRO II CHANGES MODE IN TRANSMIT MODS#
Icom IC-756 PRO II (IC 756 PRO II IC756PROII) TX mods 100 Khz - 60 MHz Icom IC-756 PRO II (IC 756 PRO II IC756PROII) TX expand on IC 756PROII #23 EU models Icom IC-756 PRO II (IC 756 PRO II IC756PROII) 6M oscillation problem Although suitable for any radio receiver / transceiver with 3. Recommended level for an Icom microphone Decreases Increases. Set the MIC control so that the ALC meter sometimes swings during normal voice transmission in SSB mode. Mods for Icom IC-756 PRO II (IC 756 PRO II IC756PROII) : Icom SP-21 external communications speaker. The transmit audio tone in SSB mode can be adjusted in set mode.
Schematics for Icom IC-756 PRO II (IC 756 PRO II IC756PROII) :
#ICOM 756 PRO II CHANGES MODE IN TRANSMIT PDF#
PDF Adjusments Procedures Manual with schematics for Icom IC-756 PRO II (IC 756 PRO II IC756PROII) : PDF User Manual for Icom IC-756 PRO II (IC 756 PRO II IC756PROII) : Icom IC-756 PRO II Instruction Manual Programming software for Icom IC-756 PRO II (IC 756 PRO II IC756PROII) : Programming interface schematics for Icom: Icom IC-756 PRO II (IC 756 PRO II IC756PROII)