Re: icom ic7000 donor availability
Very interested in your rig let me know
|
Re: IC-7K after reverse connection to 12V
How do you think I learned that lesson? It was a Kenwood TS-480 with the polarity reversed. But in my case I made the mistake of flipping the DC cable polarity at the fuses themselves. Because there were two fuses (one on + and one on the negative) and they were both on the cable with the same orientation (threaded cap toward the radio). So I also learned from that mistake not to put fuses on the DC cable such that the threaded end for both is facing the same way. That way there is no way you can switch them accidentally at the fuses.
73
Danny, K5CG
HH 550-000-0609
SKCC 14257
From: "Raoul Meunier" <rmeunier@...> To: "ic7000" < [email protected]> Sent: Thursday, November 2, 2023 3:25:36 PM Subject: Re: [ic7000] IC-7K after reverse connection to 12V
Thanks Danny, you are right. I should have had a fuse in the line... but it was an extension cable and I was in a hurry... etc etc. Quite a chain of mistakes!
One never stops learning... and one never forgets own mistakes...
I was very fortunate.
Thanks for your comments!
73, Raoul CE3RY
|
Re: IC-7K after reverse connection to 12V
Thanks Mark, you are right as well.? PN junctions do not forgive mistakes...
73 de Raoul CE3RY
|
Re: IC-7K after reverse connection to 12V
Thanks Danny, you are right. I should have had a fuse in the line... but it was an extension cable and I was in a hurry... etc etc. Quite a chain of mistakes!
One never stops learning... and one never forgets own mistakes...
I was very fortunate.
Thanks for your comments!
73, Raoul CE3RY
|
icom ic7000 donor availability
Hi ,
I am having an icom ic7000 ,relay click error radio ,with an extra CPU, let me know any members need as parts ,I can give as a whole radio with DC cable and microphone,or as individual spare parts board,the radio is intact not serviced by anyone,i will be able to seperate each board if get max response for this offer ,contact me if any one interested,attached the pics here,
73
Prabhu
|
Re: IC7000 Clock Accuracy
A thought:
There's probably a backup battery (small lithium "coin cell", most likely) in the IC-7000.? If that was weak, it would affect the timekeeping _when the radio was powered off_.? I don't think it would affect the accuracy if the radio was kept powered on.
It's easy to test - leave it turned on for a few days (in RECEIVE mode, the power drain is low), and see if the clock suddenly keeps good time.
I'm sure the battery is replaceable, but other people will have to help you with details.
.? Charles / va7cpc
On Tue, Oct 31, 2023 at 8:27?AM Edward Luers < eluers2@...> wrote: Steve,
Thanks for the reply.? The radio is one of my home radios and is cycled off every evening. I bought it in 2013.? I'm not sure that's it's worth replacing the chip.
Again thanks.
Ed KE6SU
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy < KC4SM@...> wrote:
That's terrible time keeping accuracy. My 7000 only drifts seconds per month but it lives in stable temperature environment in my shack.
The 7000 uses an Epson time keeping chip with an onboard crystal for clock and timer functions. Perhaps your has aged to the point of? substantial drift.?
I'm curious, is your radio mobile or fixed station? Temperature changes will affect time base accuracy.?
Do you power cycle the radio daily or does it remain on all the time? If you turn it off for days at a time it might be an interesting test to leave the radio powered on for several days (if possible) and see if the accuracy improves or changes.?
The only fix would be to replace the RTC time keeping chip.
Steve KC4SM?
?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers < eluers2@...> wrote:
Is there any way to improve the accuracy?? In a 24 hour period it loses about a minute.
Ed KE6SU
|
Re: IC-7K after reverse connection to 12V
I've seen radios with a reverse diode used as a crowbar on the DC input (Kenwood TS-480 for example) that will protect the radio in the event of revers polarity and it will get real hot if the fuse doesn't blow.
73
Danny, K5CG
HH 550-000-0609
SKCC 14257
From: "Mark Schoonover via groups.io" <mark@...> To: "ic7000" < [email protected]> Sent: Wednesday, November 1, 2023 11:07:42 PM Subject: Re: [ic7000] IC-7K after reverse connection to 12V
PN junctions blow faster than any fuse.? On Wed, Nov 1, 2023, 21:06 Danny K5CG < k5cg@...> wrote: It's important to have a fuse in line and the fuse value must be less than the max current of the power supply to ensure it will blow on a complete short.? 73
Danny, K5CG
HH 550-000-0609
SKCC 14257
From: "Raoul Meunier" < rmeunier@...> To: "ic7000" < [email protected]> Sent: Wednesday, November 1, 2023 3:39:32 PM Subject: [ic7000] IC-7K after reverse connection to 12V Hi Team,
A few days ago, I connected my IC-7K to the PS using an extension cable, not noticing I was reversing the polarity.?
A few seconds later, I felt a smell coming from somewhere and I inmediately disconnected it.?
There was no smoke but a bit of a smell. The unit was a bit warm in the back but nothing I couldn't hold with my bare hand.
After a while, I decided to reconnect the unit to the PS, making sure I was respecting the polarity.
I turned it on and, to my surprise, it behaved as if nothing had happened.?
The couple diodes connected between +12V and ground saved the life of many components in the 7000... and my wallet.
I wonder... Should I check something else?
I believe the smell came from the insulation of the extension cable I used to plug the unit, for it was a small diameter cable; I only needed to use the 7000 for listening.
Your comments will be welcome.
73 de Raoul CE3RY
|
Re: IC-7K after reverse connection to 12V
PN junctions blow faster than any fuse.?
On Wed, Nov 1, 2023, 21:06 Danny K5CG < k5cg@...> wrote: It's important to have a fuse in line and the fuse value must be less than the max current of the power supply to ensure it will blow on a complete short.?
73
Danny, K5CG
HH 550-000-0609
SKCC 14257
From: "Raoul Meunier" < rmeunier@...> To: "ic7000" < [email protected]> Sent: Wednesday, November 1, 2023 3:39:32 PM Subject: [ic7000] IC-7K after reverse connection to 12V
Hi Team,
A few days ago, I connected my IC-7K to the PS using an extension cable, not noticing I was reversing the polarity.?
A few seconds later, I felt a smell coming from somewhere and I inmediately disconnected it.?
There was no smoke but a bit of a smell. The unit was a bit warm in the back but nothing I couldn't hold with my bare hand.
After a while, I decided to reconnect the unit to the PS, making sure I was respecting the polarity.
I turned it on and, to my surprise, it behaved as if nothing had happened.?
The couple diodes connected between +12V and ground saved the life of many components in the 7000... and my wallet.
I wonder... Should I check something else?
I believe the smell came from the insulation of the extension cable I used to plug the unit, for it was a small diameter cable; I only needed to use the 7000 for listening.
Your comments will be welcome.
73 de Raoul CE3RY
|
Re: IC-7K after reverse connection to 12V
It's important to have a fuse in line and the fuse value must be less than the max current of the power supply to ensure it will blow on a complete short.?
73
Danny, K5CG
HH 550-000-0609
SKCC 14257
From: "Raoul Meunier" <rmeunier@...> To: "ic7000" < [email protected]> Sent: Wednesday, November 1, 2023 3:39:32 PM Subject: [ic7000] IC-7K after reverse connection to 12V
Hi Team,
A few days ago, I connected my IC-7K to the PS using an extension cable, not noticing I was reversing the polarity.?
A few seconds later, I felt a smell coming from somewhere and I inmediately disconnected it.?
There was no smoke but a bit of a smell. The unit was a bit warm in the back but nothing I couldn't hold with my bare hand.
After a while, I decided to reconnect the unit to the PS, making sure I was respecting the polarity.
I turned it on and, to my surprise, it behaved as if nothing had happened.?
The couple diodes connected between +12V and ground saved the life of many components in the 7000... and my wallet.
I wonder... Should I check something else?
I believe the smell came from the insulation of the extension cable I used to plug the unit, for it was a small diameter cable; I only needed to use the 7000 for listening.
Your comments will be welcome.
73 de Raoul CE3RY
|
IC-7K after reverse connection to 12V
Hi Team,
A few days ago, I connected my IC-7K to the PS using an extension cable, not noticing I was reversing the polarity.?
A few seconds later, I felt a smell coming from somewhere and I inmediately disconnected it.?
There was no smoke but a bit of a smell. The unit was a bit warm in the back but nothing I couldn't hold with my bare hand.
After a while, I decided to reconnect the unit to the PS, making sure I was respecting the polarity.
I turned it on and, to my surprise, it behaved as if nothing had happened.?
The couple diodes connected between +12V and ground saved the life of many components in the 7000... and my wallet.
I wonder... Should I check something else?
I believe the smell came from the insulation of the extension cable I used to plug the unit, for it was a small diameter cable; I only needed to use the 7000 for listening.
Your comments will be welcome.
73 de Raoul CE3RY
|
Re: IC7000 Clock Accuracy
toggle quoted message
Show quoted text
On Wed, Nov 1, 2023 at 5:03?AM Paul Hansen < pwhansen@...> wrote:
Regarding the clock battery
in IC-7000 logic units, I tried to order some from Icom a few months back. On
backorder with no ETA. I believe I ordered a couple from Mouser. Take a look at
628-MS920SE-FL27E. There are many others that look like they will work. It’s
$2.52 in single quantities so you’ll pay? more in shipping than for the part.
It’s a little tricky to replace it because it’s inside the logic unit but it’s
not as hard as replacing the 7300 battery.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Paul
is correct. The clock battery is probably shot. I just checked my notes and my
7000 was keeping poor time a few?
years
back. Sorry, my memory isn't what is used to be.?
The
battery is a Panasonic ML920. It is a 3 volt rechargeable manganese-lithium
cell and they cost about $12-13 on Ebay. Ouch!
BTW,
it's soldered to the logic PCB. A good test would be to leave the radio powered
on for several days and check the clock drift.
If
it keeps good time then the battery is bad and the clock chip is fine. The
clock will keep (lousy) time even if? the battery drops to
When
mine failed I cheeped out and used what I had on hand, a 2016 lithium battery
and a battery holder so next time I can just
pop-in
another battery. Because I used a non-rechargeable battery I had to disable the
charging circuit. I intended to install a
ML920
but never got back to it since it's been keeping good time ever since.?
I
did have to replace the master reference oscillator in my rig. About 7 years
ago I realized the frequency error on UHF was
about
150 Hz! The master oscillator had drifted so far out of range that I ran out of
adjustment in the service menu calibration. ICOM
had
one remaining oscillator in stock!?
On Tuesday, October 31, 2023 at 05:35:26 PM EDT, Edward Luers
<eluers2@...> wrote:
?
On Tue, Oct 31, 2023 at 12:38?PM Paul Hansen <pwhansen@...>
wrote:
IC-7000’s
have a small clock battery inside the logic unit. It’s just a tiny bit larger
than the one in the 7300 and it does not last forever. It’s very unlikely the
clock chip itself has gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Steve,
Thanks for the reply.? The radio is one of my home radios
and is cycled off every evening. I bought it in 2013.? I'm not sure that's
it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's terrible time keeping accuracy. My 7000 only drifts
seconds per month but it lives in stable temperature environment in my shack.
The 7000 uses an Epson time keeping chip with an onboard crystal
for clock and timer functions. Perhaps your has aged to the point of?
I'm curious, is your radio mobile or fixed station? Temperature
changes will affect time base accuracy.?
Do you power cycle the radio daily or does it remain on all the
time? If you turn it off for days at a time it might be an interesting test to
leave
the radio powered on for several days (if possible) and see if
the accuracy improves or changes.?
The only fix would be to replace the RTC time keeping chip.
?? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers <eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
Regarding the clock battery
in IC-7000 logic units, I tried to order some from Icom a few months back. On
backorder with no ETA. I believe I ordered a couple from Mouser. Take a look at
628-MS920SE-FL27E. There are many others that look like they will work. It’s
$2.52 in single quantities so you’ll pay? more in shipping than for the part.
It’s a little tricky to replace it because it’s inside the logic unit but it’s
not as hard as replacing the 7300 battery.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
toggle quoted message
Show quoted text
From: [email protected]
[mailto:[email protected]] On Behalf Of Steve Murphy
Sent: Wednesday, November 1, 2023 01:29
To: [email protected]
Subject: Re: [ic7000] IC7000 Clock Accuracy
?
Paul
is correct. The clock battery is probably shot. I just checked my notes and my
7000 was keeping poor time a few?
years
back. Sorry, my memory isn't what is used to be.?
The
battery is a Panasonic ML920. It is a 3 volt rechargeable manganese-lithium
cell and they cost about $12-13 on Ebay. Ouch!
BTW,
it's soldered to the logic PCB. A good test would be to leave the radio powered
on for several days and check the clock drift.
If
it keeps good time then the battery is bad and the clock chip is fine. The
clock will keep (lousy) time even if? the battery drops to
When
mine failed I cheeped out and used what I had on hand, a 2016 lithium battery
and a battery holder so next time I can just
pop-in
another battery. Because I used a non-rechargeable battery I had to disable the
charging circuit. I intended to install a
ML920
but never got back to it since it's been keeping good time ever since.?
I
did have to replace the master reference oscillator in my rig. About 7 years
ago I realized the frequency error on UHF was
about
150 Hz! The master oscillator had drifted so far out of range that I ran out of
adjustment in the service menu calibration. ICOM
had
one remaining oscillator in stock!?
On Tuesday, October 31, 2023 at 05:35:26 PM EDT, Edward Luers
<eluers2@...> wrote:
?
On Tue, Oct 31, 2023 at 12:38?PM Paul Hansen <pwhansen@...>
wrote:
IC-7000’s
have a small clock battery inside the logic unit. It’s just a tiny bit larger
than the one in the 7300 and it does not last forever. It’s very unlikely the
clock chip itself has gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Steve,
Thanks for the reply.? The radio is one of my home radios
and is cycled off every evening. I bought it in 2013.? I'm not sure that's
it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's terrible time keeping accuracy. My 7000 only drifts
seconds per month but it lives in stable temperature environment in my shack.
The 7000 uses an Epson time keeping chip with an onboard crystal
for clock and timer functions. Perhaps your has aged to the point of?
I'm curious, is your radio mobile or fixed station? Temperature
changes will affect time base accuracy.?
Do you power cycle the radio daily or does it remain on all the
time? If you turn it off for days at a time it might be an interesting test to
leave
the radio powered on for several days (if possible) and see if
the accuracy improves or changes.?
The only fix would be to replace the RTC time keeping chip.
?? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers <eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
I'll give the rig a couple of days being on and see what happens.? Thanks for the heads up.? I'll post my results.
Ed
On Tue, Oct 31, 2023 at 6:29?PM Steve Murphy < KC4SM@...> wrote:
Ed,
Paul is correct. The clock battery is probably shot. I just checked my notes and my 7000 was keeping poor time a few? years back. Sorry, my memory isn't what is used to be.?
The battery is a Panasonic ML920. It is a 3 volt rechargeable manganese-lithium cell and they cost about $12-13 on Ebay. Ouch! BTW, it's soldered to the logic PCB. A good test would be to leave the radio powered on for several days and check the clock drift. If it keeps good time then the battery is bad and the clock chip is fine. The clock will keep (lousy) time even if? the battery drops to as low as 1 volt.
When mine failed I cheeped out and used what I had on hand, a 2016 lithium battery and a battery holder so next time I can just pop-in another battery. Because I used a non-rechargeable battery I had to disable the charging circuit. I intended to install a ML920 but never got back to it since it's been keeping good time ever since.?
I did have to replace the master reference oscillator in my rig. About 7 years ago I realized the frequency error on UHF was about 150 Hz! The master oscillator had drifted so far out of range that I ran out of adjustment in the service menu calibration. ICOM had one remaining oscillator in stock!?
Hope you get it fixed.??
73? Steve? ? ? ??
On Tuesday, October 31, 2023 at 05:35:26 PM EDT, Edward Luers < eluers2@...> wrote:
Thanks Paul.
I'll give it a check.
73,
ED KE6SU On Tue, Oct 31, 2023 at 12:38?PM Paul Hansen < pwhansen@...> wrote:
IC-7000’s have a small clock
battery inside the logic unit. It’s just a tiny bit larger than the one in the
7300 and it does not last forever. It’s very unlikely the clock chip itself has
gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Steve,
Thanks for the reply.? The radio is one of my home
radios and is cycled off every evening. I bought it in 2013.? I'm not sure
that's it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's
terrible time keeping accuracy. My 7000 only drifts seconds per month but it
lives in stable temperature environment in my shack.
The
7000 uses an Epson time keeping chip with an onboard crystal for clock and
timer functions. Perhaps your has aged to the point of?
I'm
curious, is your radio mobile or fixed station? Temperature changes will affect
time base accuracy.?
Do
you power cycle the radio daily or does it remain on all the time? If you turn
it off for days at a time it might be an interesting test to leave
the
radio powered on for several days (if possible) and see if the accuracy
improves or changes.?
The
only fix would be to replace the RTC time keeping chip.
??
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers
<eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
Ed,
Paul is correct. The clock battery is probably shot. I just checked my notes and my 7000 was keeping poor time a few? years back. Sorry, my memory isn't what is used to be.?
The battery is a Panasonic ML920. It is a 3 volt rechargeable manganese-lithium cell and they cost about $12-13 on Ebay. Ouch! BTW, it's soldered to the logic PCB. A good test would be to leave the radio powered on for several days and check the clock drift. If it keeps good time then the battery is bad and the clock chip is fine. The clock will keep (lousy) time even if? the battery drops to as low as 1 volt.
When mine failed I cheeped out and used what I had on hand, a 2016 lithium battery and a battery holder so next time I can just pop-in another battery. Because I used a non-rechargeable battery I had to disable the charging circuit. I intended to install a ML920 but never got back to it since it's been keeping good time ever since.?
I did have to replace the master reference oscillator in my rig. About 7 years ago I realized the frequency error on UHF was about 150 Hz! The master oscillator had drifted so far out of range that I ran out of adjustment in the service menu calibration. ICOM had one remaining oscillator in stock!?
Hope you get it fixed.??
73? Steve? ? ? ??
On Tuesday, October 31, 2023 at 05:35:26 PM EDT, Edward Luers <eluers2@...> wrote:
Thanks Paul.
I'll give it a check.
73,
ED KE6SU
On Tue, Oct 31, 2023 at 12:38?PM Paul Hansen < pwhansen@...> wrote:
IC-7000’s have a small clock
battery inside the logic unit. It’s just a tiny bit larger than the one in the
7300 and it does not last forever. It’s very unlikely the clock chip itself has
gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Steve,
Thanks for the reply.? The radio is one of my home
radios and is cycled off every evening. I bought it in 2013.? I'm not sure
that's it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's
terrible time keeping accuracy. My 7000 only drifts seconds per month but it
lives in stable temperature environment in my shack.
The
7000 uses an Epson time keeping chip with an onboard crystal for clock and
timer functions. Perhaps your has aged to the point of?
I'm
curious, is your radio mobile or fixed station? Temperature changes will affect
time base accuracy.?
Do
you power cycle the radio daily or does it remain on all the time? If you turn
it off for days at a time it might be an interesting test to leave
the
radio powered on for several days (if possible) and see if the accuracy
improves or changes.?
The
only fix would be to replace the RTC time keeping chip.
??
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers
<eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
Thanks Paul.
I'll give it a check.
73,
ED KE6SU
On Tue, Oct 31, 2023 at 12:38?PM Paul Hansen < pwhansen@...> wrote:
IC-7000’s have a small clock
battery inside the logic unit. It’s just a tiny bit larger than the one in the
7300 and it does not last forever. It’s very unlikely the clock chip itself has
gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Steve,
Thanks for the reply.? The radio is one of my home
radios and is cycled off every evening. I bought it in 2013.? I'm not sure
that's it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's
terrible time keeping accuracy. My 7000 only drifts seconds per month but it
lives in stable temperature environment in my shack.
The
7000 uses an Epson time keeping chip with an onboard crystal for clock and
timer functions. Perhaps your has aged to the point of?
I'm
curious, is your radio mobile or fixed station? Temperature changes will affect
time base accuracy.?
Do
you power cycle the radio daily or does it remain on all the time? If you turn
it off for days at a time it might be an interesting test to leave
the
radio powered on for several days (if possible) and see if the accuracy
improves or changes.?
The
only fix would be to replace the RTC time keeping chip.
??
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers
<eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
IC-7000’s have a small clock
battery inside the logic unit. It’s just a tiny bit larger than the one in the
7300 and it does not last forever. It’s very unlikely the clock chip itself has
gone bad.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
www.amateurradioservice.com
?
toggle quoted message
Show quoted text
From: [email protected]
[mailto:[email protected]] On Behalf Of Edward Luers
Sent: Tuesday, October 31, 2023 15:27
To: [email protected]
Subject: Re: [ic7000] IC7000 Clock Accuracy
?
Steve,
Thanks for the reply.? The radio is one of my home
radios and is cycled off every evening. I bought it in 2013.? I'm not sure
that's it's worth replacing the chip.
?
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy <KC4SM@...> wrote:
That's
terrible time keeping accuracy. My 7000 only drifts seconds per month but it
lives in stable temperature environment in my shack.
The
7000 uses an Epson time keeping chip with an onboard crystal for clock and
timer functions. Perhaps your has aged to the point of?
I'm
curious, is your radio mobile or fixed station? Temperature changes will affect
time base accuracy.?
Do
you power cycle the radio daily or does it remain on all the time? If you turn
it off for days at a time it might be an interesting test to leave
the
radio powered on for several days (if possible) and see if the accuracy
improves or changes.?
The
only fix would be to replace the RTC time keeping chip.
??
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ? ? ? ? ? ? ? ?
? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers
<eluers2@...>
wrote:
Is there any way to improve the accuracy?? In a 24 hour
period it loses about a minute.
|
Re: IC7000 Clock Accuracy
Steve,
Thanks for the reply.? The radio is one of my home radios and is cycled off every evening. I bought it in 2013.? I'm not sure that's it's worth replacing the chip.
Again thanks.
Ed KE6SU
On Tue, Oct 31, 2023 at 3:38?AM Steve Murphy < KC4SM@...> wrote:
That's terrible time keeping accuracy. My 7000 only drifts seconds per month but it lives in stable temperature environment in my shack.
The 7000 uses an Epson time keeping chip with an onboard crystal for clock and timer functions. Perhaps your has aged to the point of? substantial drift.?
I'm curious, is your radio mobile or fixed station? Temperature changes will affect time base accuracy.?
Do you power cycle the radio daily or does it remain on all the time? If you turn it off for days at a time it might be an interesting test to leave the radio powered on for several days (if possible) and see if the accuracy improves or changes.?
The only fix would be to replace the RTC time keeping chip.
Steve KC4SM?
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On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers < eluers2@...> wrote:
Is there any way to improve the accuracy?? In a 24 hour period it loses about a minute.
Ed KE6SU
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Re: IC7000 Clock Accuracy
That's terrible time keeping accuracy. My 7000 only drifts seconds per month but it lives in stable temperature environment in my shack.
The 7000 uses an Epson time keeping chip with an onboard crystal for clock and timer functions. Perhaps your has aged to the point of? substantial drift.?
I'm curious, is your radio mobile or fixed station? Temperature changes will affect time base accuracy.?
Do you power cycle the radio daily or does it remain on all the time? If you turn it off for days at a time it might be an interesting test to leave the radio powered on for several days (if possible) and see if the accuracy improves or changes.?
The only fix would be to replace the RTC time keeping chip.
Steve KC4SM?
?? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ? ??
On Monday, October 30, 2023 at 06:07:49 PM EDT, Edward Luers <eluers2@...> wrote:
Is there any way to improve the accuracy?? In a 24 hour period it loses about a minute.
Ed KE6SU
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Is there any way to improve the accuracy?? In a 24 hour period it loses about a minute.
Ed KE6SU
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Re: No TX audio on JS8CALL
This is good to know. Thank you. I am wondering why my 6 pin
Mini-DIN is not working with this cable as it works on other radios.
Chris KQ6UP
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On Fri, Oct 27, 2023 at 7:20?AM Steve W3AHL <w3ahl@...> wrote:
Chris,
Two issues to be aware of when using the 13-pin DIN ACC input:
The audio input on pin 11 is much more sensitive (100 mv.) than the DATA connector. Even with good ferrite chokes on the cable, it is susceptible to picking up RFI, which distorts the audio, especially when used in portable operation with less than ideal antennas and station grounding. The solution is to put a 68K resistor in series with pin 11 inside the DIN connector shell. This increases the audio input level closer to 2 volts, which decreases the effects of any RFI and also makes level adjustment less touchy with most sources. This is especially important for SCS Pactor units.
When using the ACC port, its audio input on pin 11 goes to the same input bus as the external mic connectors on the front and rear panels. If a mic is plugged into either port any noise in the room picked up by the mic will be mixed with the data audio, causing data errors at the receiving station. The only solution is to always unplug the mic's when using a digital mode via ACC. The DATA port does not have this problem.
Steve, W3AHL
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Thanks,
Chris Maness
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Danny K5CG
Edward Luers