|
It transmits and works fine on all other bands except 17 and 15. My antenna is fine and works well with other rigs. When keying up on any mode this is what the meter reading says. Any help is appreciated. Thanks Ken The antenna tuner works fine
|
|
MONTHLY REMINDER--Our Amateur Radio Groups
#monthly-notice
MONTHLY REMINDER--Our Amateur Radio Groups Below are our amateur radio related groups. Some may be new enough there are only a few members. If one of those interests you, join it and give it some time to grow. It costs nothing and if there’s few members, it won’t be filling up your inbox while you wait for it to grow. ? Alinco /g/Alinco-Amateur-Radio Antenna Tuners /g/Antenna-Tuners Anytone /g/Anytone-Amateur-Radio Baofeng /g/Baofeng CHIRP radio programming tool /g/CHIRP EF Johnson /g/EFJohnson-Amateur-Radio Ham radio antennas https://ham-antennas.groups.io/g/main Ham Radio Help group https://hamradiohelp.groups.io/g/main Icom /g/ICOM Icom 746 /g/Icom-746 Icom 746 Pro /g/Icom-746Pro Kenwood /g/Kenwood-Amateur-Radio MFJ ham equipment /g/MFJ-Amateur-Radio National /g/National-Amateur-Radio RF Amplifiers https://rf-amplifiers.groups.io/g/main Swan /g/Swan-Amateur-Radio Yaesu FT-757 /g/FT-757GX Yaesu FT-767GX /g/FT-767GX
|
|
service manual
6
would anyone have a good copy of the RF unit parts diagram please for the ic746 non pro the pro is a different layout the ones i have found are terribly blurred. thanks
|
|
IC-746PRO 2M sensitivity?
18
Hi folks, I picked up a 746PRO yesterday, and on 2M S-meter readings seem pretty low. I do have a generator, but don't currently have a "real" SINAD meter so can't test it objectively. Switching between radios, the PRO sounds about the same on this signal or that one as my other rigs, but the digi-bar-meter-thingy reads low. Any similar experiences? The rig works well otherwise, 100W or close to it transmit on all bands. Dirty trimpot? The rig's last home was gentle, but out in the deserts of Eastern WA. Thanks, Jim N7CXI
|
|
The 746 PRO service manual specifies 1 MILLIVOLT audio be injected at the mic connector. Other than building an attenuator and hoping for the best, I’m not sure where to go with that. Anyone been there and figured something out? I would rubber band a speaker to the mic if I had a way to measure 1mV at the connector… Thanks and 73, Jim N7CXI
|
|
I have an 764PRO on indefinite loan from a friend. I got my Technician license in August and have been using 2m and 70cm repeaters and nets and done some simplex for a contest. I'm probably using 10% of the capability of this radio (e.g., VHF FM only) and I don't understand all the settings or even all of the display. For example, here's a shot of transmitting on VHF with the RF Power knobbed turned full clockwise (full power). How do I interpret the power setting? Do I look at the "Po" scale? Is this at about 35W transmitting? If so, why is it 35W with RF Power turned all the way up? Shouldn't it be 100W? Do any other settings on the display look weird for VHF FM? Thanks for any guidance. John KO6FRP
|
|
New ICOM CR-338 High Stability Crystal Reference option for the IC-746PRO transceiver. Also fits IC-718 and IC-707 as well. Discontinued item and now obsolete. $135 shipped; PayPal only. Sold "as-is" and sale final. No warranty is either expressed or implied. No returns or refunds. No offers please. Sells and ships to USA residents only.
|
|
RF Board availability
4
Hi Folks, wondering if anyone has a source for a complete iCOM 746 Pro RF Board, or at least an MB8713IC capacitor which is the individual part I need. Thanks. John KQ4TLF
|
|
I have a 746Pro that was new in box when I purchased it in May of 2023. It is still in like new condition and has zero issues. I have the original box and everything that came with it. For full asking price of $700, I will include the RIGBlaster Plug and Play with all cables and software. I purchased that last summer but have never hooked it up. I prefer local pickup in Buford, Ga, but am willing to ship at buyers expense or drive a reasonable distance to meet for delivery. Thanks Randy KN4DY
|
|
Icom IC 746pro death TX
10
Hi guys. Still can’t solve my 746pro TX death on all bands and mods. Had scope on IC151 uPC1678G pin 1 and pin 5 .Got nothing ,zero RF .Radio was set at full RF output FM at 3.500kHz. This chip is getting hot even when RX is on,that is abnormal as per OZ2M and many guys adding heat sink on the IC151. Radio ser.# A03100 or 03100 .Look like letter A was imprinted by hand. So far I ran out of ideas but will not give up,hi hi! I’ll need Ur help guys,PLS. TNX,Ed VE3REJ Sent from Mail for Windows From: Mark Brueggemann via groups.io Sent: November 30, 2021 12:07 PM To: [email protected] Subject: Re: [Icom-746Pro] CI-V failure? One can test a CIV interface (TTL serial or USB) by shorting the tip and ring on the cable and using a terminal program (PuTTY, et al) to see if typed characters will echo. One can use a basic voltmeter on the radio CIV port and "see" data (changing reading) when the VFO knob is turned. If the data buffers are popped (not uncommon with an ESD event) then the port will appear dead or stuck. Barring a PC issue or dead port, it comes down to addressing. Mark K5LXP Albuquerque, NM
|
|
New ICOM part #5030002150 LCD frequency display for the IC-746PRO transceiver. This part is considered obsolete as it is no longer available from ICOM America. The ones for sale here were obtained from ICOM Japan and were the last 2 remaining units. Get your replacement display now before they are gone for good. These displays have a finite lifespan and will can fade or get the dreaded black spot rot. This sale is for the LCD display module itself and does not include any other parts (but not limited to) such as the front panel, window, circuit boards, wiring harnesses, ribbon wire assemblies, hardware, brackets, shield covers, etc. $160 each plus $15 shipping. I have 2 available. PayPal only. Sold "as-is" and sale final. No warranty is either expressed or implied. We are not liable for user or repair company damage to this part and/or the radio it is being installed in. No returns or refunds. No offers please. Sells and ships to USA residents only.
|
|
Stuck in Scan Mode
4
My -746PRO came on today on powerup in the SCAN mode, and I can't get it to turn off SCAN mode. * I can change from VFO to Memory, and it then scans Memory channels continuously. * I've tried the CPU Reset with no result, other than blank memory channels now. * Power cycling doesn't help. * I can change bands, and it just scans the selected band. * The Function Keys in the Scan menu will beep; Span and Set seem to work. Any ideas on getting it back out of SCAN mode? Thanks, Richard Schmidt, K1RS Scottsdale, AZ
|
|
File Notifications
2
#file-notice
The following items have been updated in the Files area of the [email protected] group. /Icom IC-746 Pro Manuals/2002-IC-746Pro-ServiceManual.pdf By: Peter Laws <plaws0@...> Description: Service Manual IC-746Pro Dated 2002 Zoomable The following items have been updated in the Files area of the [email protected] group. /Icom IC-746 Pro Manuals/2009-IC-746Pro-ServiceManual.pdf By: Peter Laws <plaws0@...> Description: Updated Service Manual IC-746Pro Dated 2009 Zoomable
|
|
Does anyone have a working download to the maintenance manual? I tried downloaded the one listed in files that is zoomable but it appears to be corrupt or a broken link. I can't seem to locate my copy. Thanks
|
|
I know everyone most likely tired of hearing about the IC151 death issue? .... So while I was replacing ic151 in my 746pro I noticed that the device that comes off pin 1 ( maybe a cap?) is missing... I know if was there when I started because I took a photo of the board before I began working on it. It is not in the after picture ? Where did it go? Problem is I cannot get a real clear picture of the schematic that has values of the components. Since that pin looks like the low rf input I would think it is most likely a capacitor to allow the RF to be amplified and come out on pin 5? The part I'm talking about is the one going off at right angle of pin 1? Anyone help me figure this out of have a schematic with values? And help on this would be appreciated... I have searched the entire rig to see if maybe it fell into the rig .. Nothing ..Ha bad day Ha HA ...Mike
|
|
Icom-746Pro only allow CTCSS tones to be enabled in memory 1
3
Today, I decided to use my 746PRO to access local 2 meter repeaters. It appears that CTCSS tones can only be enabled in memory 1. Different tones can be stored in other memories but the tone enable feature only works in memory 1. Maybe I am missing something. Bug or feature? - 73, Bernie VE3FW Ottawa, Canada
|
|
Relays in audio chain?
3
Every once in a while, like say if I've been casually operating in RTTY Roundup, some relay starts buzzing in the radio. It's worse when the external audio jack is connected to the audio mixer but still there. I pull audio for digital modes off ACC(1) and that audio is not affected - stations are still printing, even when the relay is buzzing. Percussive maintenance fixes it for a while, but that's loud enough (picking up the front of the radio and dropping in 2 cm to the shelf) to annoy the dogs, who bark, which annoys my SO ... RL740 on the schematic, near J740 (EXT Speaker jack) jumps out at me on the schematic in the SM but ... well ... Anyone else have this issue or hear of it? -- Peter Laws | VE[23]UWY / N5UWY | plaws0 gmail com | Travel by Train!
|
|
IC-746Pro RD100hhf1c Finals
7
Hello Group, I hope someone might have an addendum to the service manual, pertaining to the final amp section. This rig I picked up has one final blown. Much to my surprise when I lifted the metal cap to the final I discovered it to be an RD100hhf1, not the 2SC5125 as stated in service manual I have. I have no need for any troubleshooting help, I just need the schematic (final amp section) if anyone happens to have this info. Very much appreciate any help with this. I be on the phone Monday with Icom to see if they can sort this out. 73, Art NM1A
|
|
Wanted: 746 Pro Main (CPU) Board
2
I picked up a 746 Pro at a hamfest silly cheap sold as not transmitting. Seller said he thought he'd tracked it down to an issue with the CPU, which I confirmed last night (pin 127 is supposed to pull to 0V when in transmit, it just stays at 5V) so I believe if I can swap this board out I can get the rig going again. There are some (alleged) replacement chips on eBay but I'm loathe to trust the quality of the part or my SMD soldering skill to deal with a 128 pin part. So if anyone has a junker 746 Pro that has a good CPU board in it, let me know what you have. Looking to get this rig back up on the air. 73 Bart KZ4KF
|
|
CR-282
4
Hi all, Has anyone used these "imitation" CR-282's? Thank you and 73, Bob W4JFA
|
Image Name
Sat 8:39am
Sat 8:39am