Re: CR-2025 battery replacement for ICOM 751
Lee
As long as the battery is about 3 volts or more, I wouldn't replace the battery. I have several rigs with RAM boards that still have the original battery and still going strong. I check the batteries once a year or so and have never seen one discharged to the point of doing a battery replacement. I can't confirm it but my understand is that the battery gets a very minute trickle charge if it is powered regularly. Rigs that sit in a closet not used many years are the ones that are most likely to have a problem. At least you have secured a replacement aftermarket board for the day you may need it. With my luck the day I would need the replacement board they wont be available any longer! Maybe I should get on the stick and pick up a spare for that day.
Lynn WR7G
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Re: CR-2025 battery replacement for ICOM 751
I ordered a couple BR2325 HCN batteries.? (Rig call for a BR2323 1HC.? Looks like the 1HC type is obsolete.? Looks like the only difference is the HCN has 2-pins on one side instead of 1-pin. Looks like you can cut off one pin and wind up with the proper configuration.? (I also received my $100 replacement non volatile board.? Not sure which way I will go with this.)
Lee, w0vt
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On 4/5/2025 9:13 PM, Donald Hellen wrote: That's one of those, "Why didn't Icom use non-volatile ROM (RAM?) when they
designed the radio?" things.
For the most part, Icom didn't seem to go out of their way to make things break
and become obsolete in a planned manner, but they had to realize that this would
(sort-of) ruin a radio, or cause a lot of headaches in re-flashing the ROM
(RAM?).
Donald KX8K
On Fri, 4 Apr 2025 18:33:02 +0000 (UTC), "Steve Toth via groups.io"
<stoth47@...> wrote:
FWIW I like to keep my gear looking "factory" so I replaced the ICOM memory board in my 751A with the PIEXX board - works great and eliminated the battery issue entirely.I do not have any connection with PIEXX - just a satisfied end user of the product. ----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM /g/Ham-Antennas
/g/HamRadioHelp /g/Baofeng
/g/CHIRP
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Hi can anyone help? with trunking software for the FT610 MT csf600mpt or help with product code?
?
Thanks in advance Ray 2E0IVM
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I tried that with my Pro III and it didn't work.? Preliminary conclusion is that WSJT-X sends a USB CI-V command with each transmission which cancels out the digital mode set with the long USB button press.
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I am not sure on a IC756 but on my IC756ProII and III holding the USB button down in USB mode switches me to USB-D and the mic is muted.
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150 watts output! Check your manual, if it has the same PA as the American version, it should only be 100 watts.? Maybe someone "turned it up". Dave n1rnd
ok I will try to bypass the ant tuner, and will let you know.
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73s,
Adhi
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ok I will try to bypass the ant tuner, and will let you know.
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73s,
Adhi
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Re: CR-2025 battery replacement for ICOM 751
That's one of those, "Why didn't Icom use non-volatile ROM (RAM?) when they designed the radio?" things. For the most part, Icom didn't seem to go out of their way to make things break and become obsolete in a planned manner, but they had to realize that this would (sort-of) ruin a radio, or cause a lot of headaches in re-flashing the ROM (RAM?). Donald KX8K On Fri, 4 Apr 2025 18:33:02 +0000 (UTC), "Steve Toth via groups.io" <stoth47@...> wrote: FWIW I like to keep my gear looking "factory" so I replaced the ICOM memory board in my 751A with the PIEXX board - works great and eliminated the battery issue entirely.I do not have any connection with PIEXX - just a satisfied end user of the product. ---------------------------------------------------- Some ham radio groups you may be interested in: /g/ICOM /g/Ham-Antennas/g/HamRadioHelp /g/Baofeng/g/CHIRP
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@ Lou N2JPR
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Not possible.
--
Daniel
HB9DDS
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Hello
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I'm runnung WSJT-Z with my IC-756 and the modem from XGGCOMMS (Digimode-4).
Unfortunately the microphone is NOT muted when using Digital.
?
Does anyone have a solution?
--
Daniel
HB9DDS
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Re: CR-2025 battery replacement for ICOM 751
Hi Steve,
That is what I decided to do.? I ordered the PIEXX board.? They
shipped it yesterday, so I am waiting for it to arrive.
Lee, w0vt
On 4/4/2025 1:33 PM, Steve Toth via
groups.io wrote:
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Show quoted text
Some really interesting and
creative solutions here worth considering!
FWIW I like to keep my gear
looking "factory" so I replaced the ICOM memory board in my
751A with the PIEXX board - works great and eliminated the
battery issue entirely.
I do not have any
connection with PIEXX - just a satisfied end user of the
product.
- Steve? W7SJT
"Always look for a positive solution
then Improvise, Adapt, and Overcome"
- U.S. Marine Corp
"There are no rules here!...We're
trying to accomplish something!!"
- Thomas Edison
"Someone may be born with more talent
than you, but there is no excuse for them to work
harder than you."
- Anonymous
You are braver than you believe,
stronger than you seem, and smarter than you think!"
- Winnie the Pooh
?
On Thursday, April 3, 2025 at 07:49:28 PM MDT, Glenn
via groups.io <glennve1ij@...>
wrote:
As stated earlier, I mounted?a small
holder on the rear of my 735 and installed two AAA
cells in it. Worked great and easy change.
Glenn VE1AQF
On Thu,
Apr 3, 2025 at 10:29?PM Donald Hellen via
<donhellen= [email protected]>
wrote:
On
Thu, 3 Apr 2025 13:16:44 +0000, "Clint, VE3CMQ"
<ve6cmm@...>
wrote:
> I have put these in a few Icoms and haven’t
had a problem.? In 10 years, it’ll be very easy to
change the battery.? Just make sure that you do
all your work with the power ON or a 5V power
source connected to the module or you will loose
the volatile memory.
Or, mount two battery holders next to each other
in parallel. When it's time,
install your new battery in the empty battery
holder and then remove the old one
and dispose of it properly. That keeps power to
the memories at all times unless
you don't replace it in a timely manner.
I always thought mounting on the rear panel, if
possible, on any radio needing a
coin cell replaced every 5 or so years would make
it very convenient to change
out the battery.
Donald KX8K
----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM?
?/g/Ham-Antennas
/g/HamRadioHelp?
? /g/Baofeng
/g/CHIRP?
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Finally (for now), here is my IC-551 SSB/AM/CW/FM 6M transceiver that I am offering for sale. It is operational, but as with the others, has some scratchy pots, etc. It has been outfitted with the optional EX-106 FM Unit and the EX-107 Vox Unit installed. It does not have the EX-108 PBT unit. It has a sensitive receiver and it was my introduction to SSB DXing on 6M. It comes with all of the originally supplied accessories, including the hand microphone, as well as the original boxes for the 551 and the EX-106 and EX-107.? I had a lot of fun with this! I am hopeful that someone will put it on the air or else add it to a ham radio museum. Please see the attached photo. If interested, please make me an offer.?
?
--
73, Edgar - K9RE
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Re: CR-2025 battery replacement for ICOM 751
Some really interesting and creative solutions here worth considering!
FWIW I like to keep my gear looking "factory" so I replaced the ICOM memory board in my 751A with the PIEXX board - works great and eliminated the battery issue entirely. I do not have any connection with PIEXX - just a satisfied end user of the product.
- Steve? W7SJT
"Always look for a positive solution then Improvise, Adapt, and Overcome" - U.S. Marine Corp
"There are no rules here!...We're trying to accomplish something!!" - Thomas Edison
"Someone may be born with more talent than you, but there is no excuse for them to work harder than you." - Anonymous
You are braver than you believe, stronger than you seem, and smarter than you think!" - Winnie the Pooh
?
On Thursday, April 3, 2025 at 07:49:28 PM MDT, Glenn via groups.io <glennve1ij@...> wrote:
As stated earlier, I mounted?a small holder on the rear of my 735 and installed two AAA cells in it. Worked great and easy change. Glenn VE1AQF
On Thu, Apr 3, 2025 at 10:29?PM Donald Hellen via <donhellen= [email protected]> wrote: On Thu, 3 Apr 2025 13:16:44 +0000, "Clint, VE3CMQ" <ve6cmm@...> wrote:
> I have put these in a few Icoms and haven’t had a problem.? In 10 years, it’ll be very easy to change the battery.? Just make sure that you do all your work with the power ON or a 5V power source connected to the module or you will loose the volatile memory.
Or, mount two battery holders next to each other in parallel. When it's time,
install your new battery in the empty battery holder and then remove the old one
and dispose of it properly. That keeps power to the memories at all times unless
you don't replace it in a timely manner.
I always thought mounting on the rear panel, if possible, on any radio needing a
coin cell replaced every 5 or so years would make it very convenient to change
out the battery.
Donald KX8K
----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM? ?/g/Ham-Antennas
/g/HamRadioHelp? ? /g/Baofeng
/g/CHIRP?
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Up next is a nicely kept IC-211 2M SSB/CW/FM transceiver. This was my introduction to the world of 2M SSB. It's in good shape for its age, given the usual caveats about scratchy pots. It powers up, but it needs repair before it can be used because the synthesizer is unlocked. It worked fine before that started happening. It has the modification that makes the squelch work on SSB as well as FM. It comes with the original manual, accessories (including hand mic), and the box as seen in the attached photo. Please make offer if interested. It would be great if someone would restore this and put it into operation, or put it on display in a ham radio museum. It worked quite well for me. Also please take a look at my ICOM 735 for sale: /g/ICOM/topic/ic_735_for_sale/112086062
--
73, Edgar - K9RE
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I have an IC735 in which the "HAM" pushbutton no longer works. Does anyone know of a source for this item and how difficult is replacing it? Glenn VE1IJ
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I have a nice IC-735 transceiver for sale that I'm no longer using. This was once my dream rig. It's in decent shape for its age, with a few scratchy pots and some operational issues above 20 MHz; probably VCO related. It might need to have the plastic trimmers replaced. It has the accessory 250 Hz CW filter installed. It also comes with the supplied accessories including the hand mic (never used), the original manual, and the full ICOM service manual (not a copy), It it in the original box. I am sure it is fixable, and there are people who work on these if you don't want to. I don't need it, so I thought I would offer it for sale. The package originally sold for around $1,000 in November, 1986. If interested, please make offer. See attached picture.
--
73, Edgar - K9RE
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Re: CR-2025 battery replacement for ICOM 751
Best thing is to fit a button battery holder makes battery replacement a dodled next time loads of types available
AutoZone.
Get
On Apr 2, 2025, at 23:39, "Leland L. Bahr via " < eastex.net@ target=_blank>w5drc=@> wrote:
I need/want to replace my memory CR-2025 battery with tabs in my IC751 transceiver.? Where can I buy a couple CR-2025 with tabs that are good quality and have a somewhat recent date code on them?? I was looking at past posts regarding an upgrade non volatile memory board but I don't think they are available anymore.? So if that is the case I need to replace the battery.? (I understand you need to supply 3 volts to the volatile memory while replacing the CR-2025 }? Anyone on here with good advice?
Lee, w0vt?
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Re: CR-2025 battery replacement for ICOM 751
toggle quoted message
Show quoted text
I need/want to replace my memory CR-2025 battery with tabs in my IC751 transceiver.? Where can I buy a couple CR-2025 with tabs that are good quality and have a somewhat recent date code on them?? I was looking at past posts regarding an upgrade non volatile memory board but I don't think they are available anymore.? So if that is the case I need to replace the battery.? (I understand you need to supply 3 volts to the volatile memory while replacing the CR-2025 }? Anyone on here with good advice?
Lee, w0vt?
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Re: CR-2025 battery replacement for ICOM 751
As stated earlier, I mounted?a small holder on the rear of my 735 and installed two AAA cells in it. Worked great and easy change. Glenn VE1AQF
On Thu, Apr 3, 2025 at 10:29?PM Donald Hellen via <donhellen= [email protected]> wrote: On Thu, 3 Apr 2025 13:16:44 +0000, "Clint, VE3CMQ" <ve6cmm@...> wrote:
> I have put these in a few Icoms and haven’t had a problem.? In 10 years, it’ll be very easy to change the battery.? Just make sure that you do all your work with the power ON or a 5V power source connected to the module or you will loose the volatile memory.
Or, mount two battery holders next to each other in parallel. When it's time,
install your new battery in the empty battery holder and then remove the old one
and dispose of it properly. That keeps power to the memories at all times unless
you don't replace it in a timely manner.
I always thought mounting on the rear panel, if possible, on any radio needing a
coin cell replaced every 5 or so years would make it very convenient to change
out the battery.
Donald KX8K
----------------------------------------------------
Some ham radio groups you may be interested in:
/g/ICOM? ?/g/Ham-Antennas
/g/HamRadioHelp? ? /g/Baofeng
/g/CHIRP?
|
HB9DDS
Lou N2JPR
Edgar K9RE
Glenn
