Thanks Bob
I fixed 2 ICOM 7000 with PD50015 burnt ; compliments for your job
and thanks for your feedback
Best 73 de IW0HEX Pasquale
(Rome, ITALY)
Il 23/07/2024 19:34, Bob ha scritto:
toggle quoted message
Show quoted text
Hi all, I've attached a picture of the burned and
new driver boards. There is a 1 ohm resistor on both. I hope the
picture isn't
too large for groupsIO.
Bob W4JFA
Congratulations
on
successfully replacing the driver board in your
IC-7000. Replacing those flex
cables from the PA to the MAIN is a real
challenge.
?
Now
for the reason I’m jumping in on this. The driver is
not being
damaged from excessive heat. No IC-7000’s have any
heatsink compound under the
metal substrate. Those driver transistors and the
circuit they are in seem to
be barely stable. I believe they are breaking into
an oscillation and setting
themselves on fire. Many IC-7000’s have come through
here with a smoked driver.
Almost all of them melted down while in receive.
Several smoked without ever transmitting
at all.
?
The
1 ohm resistor place in the source lead is designed
to provide
a bit of negative feedback in hopes of halting
oscillation. It’s partially successful.
I’ve repaired and replaced drivers that have been
updated too.
?
Thank
You
?
Paul
W. Hansen, W6XA
Amateur
Radio Service
2134
Carthage Road
Tucker,
GA 30084
(864)
222-3539
?
?
Got it done. Full power out on
all bands. Old board burned.
There was no heat sink grease on it. It looks like
the heat sink design is good
but why would they apply grease on everything else
but not that?
Years ago I replaced an RF
brick in an Icom dual band
mobile, IC207. No heat sink grease on that either.
It does now. I don't get it.
Yes the radio gets quite warm.
Did very little transmitting
and still warm. A while back I worked on a
friend's 706. I was on the air
testing and talking to a friend and noticed it was
getting quite warm. My
friend that I was talking to owns about three
706's. He said that's normal.
That made me feel better cuzz I was getting
concerned.
Thanks guys. I would like to be
a 7000 owner someday
73, Bob W4JFA (near Charlotte,
NC)
?
On Mon, Jul 22, 2024, 7:41 AM
RICHARD OLSON via
<richard777=[email protected]>
wrote:
The 7000 notoriously
runs
hot. I have had mine for over 10 years and
like a Timex watch it takes a
licking and keeps on ticking. I keep a small
fan blowing from the back on the
heat sink towards the front.?
Geoff, Thank you. I'll
start on the radio Monday USA eastern
time. I don't know if the new board has the
resistor or not but maybe I can add
one if it doesn't. If the added resistor is
the only change then I'm sure
there's no reason why I can't add one. I've
done things like that B4. My gut
feeling is if I can add more heat sinking,
that will help. Not sure until I see
it.?
?
The driver pcb is not
too difficult to get out and you will
see the signs if it was the cause of the
smoke. If your new driver board has
the new resistor fitted you're good to
go. But you will have to go through the
adjustment procedure contained in the
manual. I've replaced 2 and they're
still
working fine
Take pictures before
the disassembly, it really helps.
?
?
|
Hi all, I've attached a picture of the burned and new driver boards. There is a 1 ohm resistor on both. I hope the picture isn't too large for groupsIO. Bob W4JFA
Congratulations on
successfully replacing the driver board in your IC-7000. Replacing those flex
cables from the PA to the MAIN is a real challenge.
?
Now for the reason I’m jumping in on this. The driver is not being
damaged from excessive heat. No IC-7000’s have any heatsink compound under the
metal substrate. Those driver transistors and the circuit they are in seem to
be barely stable. I believe they are breaking into an oscillation and setting
themselves on fire. Many IC-7000’s have come through here with a smoked driver.
Almost all of them melted down while in receive. Several smoked without ever transmitting
at all.
?
The 1 ohm resistor place in the source lead is designed to provide
a bit of negative feedback in hopes of halting oscillation. It’s partially successful.
I’ve repaired and replaced drivers that have been updated too.
?
Thank You
?
Paul W. Hansen, W6XA
Amateur Radio Service
2134 Carthage Road
Tucker, GA 30084
(864) 222-3539
?
?
Got it done. Full power out on all bands. Old board burned.
There was no heat sink grease on it. It looks like the heat sink design is good
but why would they apply grease on everything else but not that?
Years ago I replaced an RF brick in an Icom dual band
mobile, IC207. No heat sink grease on that either. It does now. I don't get it.
Yes the radio gets quite warm. Did very little transmitting
and still warm. A while back I worked on a friend's 706. I was on the air
testing and talking to a friend and noticed it was getting quite warm. My
friend that I was talking to owns about three 706's. He said that's normal.
That made me feel better cuzz I was getting concerned.
Thanks guys. I would like to be a 7000 owner someday
73, Bob W4JFA (near Charlotte, NC)
?
On Mon, Jul 22, 2024, 7:41 AM RICHARD OLSON via <richard777=[email protected]> wrote:
The 7000 notoriously runs
hot. I have had mine for over 10 years and like a Timex watch it takes a
licking and keeps on ticking. I keep a small fan blowing from the back on the
heat sink towards the front.?
Geoff, Thank you. I'll start on the radio Monday USA eastern
time. I don't know if the new board has the resistor or not but maybe I can add
one if it doesn't. If the added resistor is the only change then I'm sure
there's no reason why I can't add one. I've done things like that B4. My gut
feeling is if I can add more heat sinking, that will help. Not sure until I see
it.?
?
The driver pcb is not too difficult to get out and you will
see the signs if it was the cause of the smoke. If your new driver board has
the new resistor fitted you're good to go. But you will have to go through the
adjustment procedure contained in the manual. I've replaced 2 and they're still
working fine
Take pictures before the disassembly, it really helps.
?
?
|
Congratulations on
successfully replacing the driver board in your IC-7000. Replacing those flex
cables from the PA to the MAIN is a real challenge.
?
Now for the reason I’m jumping in on this. The driver is not being
damaged from excessive heat. No IC-7000’s have any heatsink compound under the
metal substrate. Those driver transistors and the circuit they are in seem to
be barely stable. I believe they are breaking into an oscillation and setting
themselves on fire. Many IC-7000’s have come through here with a smoked driver.
Almost all of them melted down while in receive. Several smoked without ever transmitting
at all.
?
The 1 ohm resistor place in the source lead is designed to provide
a bit of negative feedback in hopes of halting oscillation. It’s partially successful.
I’ve repaired and replaced drivers that have been updated too.
?
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 Bob
Sent: Monday, July 22, 2024 19:57
To: [email protected]
Subject: Re: [ic7000] Driver board
?
Got it done. Full power out on all bands. Old board burned.
There was no heat sink grease on it. It looks like the heat sink design is good
but why would they apply grease on everything else but not that?
Years ago I replaced an RF brick in an Icom dual band
mobile, IC207. No heat sink grease on that either. It does now. I don't get it.
Yes the radio gets quite warm. Did very little transmitting
and still warm. A while back I worked on a friend's 706. I was on the air
testing and talking to a friend and noticed it was getting quite warm. My
friend that I was talking to owns about three 706's. He said that's normal.
That made me feel better cuzz I was getting concerned.
Thanks guys. I would like to be a 7000 owner someday
73, Bob W4JFA (near Charlotte, NC)
?
On Mon, Jul 22, 2024, 7:41 AM RICHARD OLSON via <richard777=[email protected]> wrote:
The 7000 notoriously runs
hot. I have had mine for over 10 years and like a Timex watch it takes a
licking and keeps on ticking. I keep a small fan blowing from the back on the
heat sink towards the front.?
Geoff, Thank you. I'll start on the radio Monday USA eastern
time. I don't know if the new board has the resistor or not but maybe I can add
one if it doesn't. If the added resistor is the only change then I'm sure
there's no reason why I can't add one. I've done things like that B4. My gut
feeling is if I can add more heat sinking, that will help. Not sure until I see
it.?
?
The driver pcb is not too difficult to get out and you will
see the signs if it was the cause of the smoke. If your new driver board has
the new resistor fitted you're good to go. But you will have to go through the
adjustment procedure contained in the manual. I've replaced 2 and they're still
working fine
Take pictures before the disassembly, it really helps.
?
?
|
That sounds like a good idea. My 746 has a fan on it 100% of the time. Bob W4JFA?
I have my IC-7000 body under the backseat in the factory storage tray.? As I mostly operate my radio when parked (don't want to run the engine) I use a 100Ah LiFePO4 battery - I get hours and hours of operation from it.? I have a 5V USB port on the battery that I can charge a phone with, but I use it to power a 120mm fan that I just have sitting over the top of the radio and heatsink....even with the fan on it's lowest setting, the temp gauge on the radio rarely budges from the "cool" side of things now.
|
I have my IC-7000 body under the backseat in the factory storage tray.? As I mostly operate my radio when parked (don't want to run the engine) I use a 100Ah LiFePO4 battery - I get hours and hours of operation from it.? I have a 5V USB port on the battery that I can charge a phone with, but I use it to power a 120mm fan that I just have sitting over the top of the radio and heatsink....even with the fan on it's lowest setting, the temp gauge on the radio rarely budges from the "cool" side of things now.
|
Got it done. Full power out on all bands. Old board burned. There was no heat sink grease on it. It looks like the heat sink design is good but why would they apply grease on everything else but not that?
Years ago I replaced an RF brick in an Icom dual band mobile, IC207. No heat sink grease on that either. It does now. I don't get it.
Yes the radio gets quite warm. Did very little transmitting and still warm. A while back I worked on a friend's 706. I was on the air testing and talking to a friend and noticed it was getting quite warm. My friend that I was talking to owns about three 706's. He said that's normal. That made me feel better cuzz I was getting concerned.
Thanks guys. I would like to be a 7000 owner someday
73, Bob W4JFA (near Charlotte, NC)
On Mon, Jul 22, 2024, 7:41 AM RICHARD OLSON via <richard777= [email protected]> wrote:
Hi Bob
?
The 7000 notoriously runs hot. I have had mine for over 10 years and like a Timex watch it takes a licking and keeps on ticking. I keep a small fan blowing from the back on the heat sink towards the front.?
?
Richard w3rlo
?
?
?
?
Geoff, Thank you. I'll start on the radio Monday USA eastern time. I don't know if the new board has the resistor or not but maybe I can add one if it doesn't. If the added resistor is the only change then I'm sure there's no reason why I can't add one. I've done things like that B4. My gut feeling is if I can add more heat sinking, that will help. Not sure until I see it.?
I'll?keep you posted.
Bob W4JFA?
Hi Bob,
?
The driver pcb is not too difficult to get out and you will see the signs if it was the cause of the smoke. If your new driver board has the new resistor fitted you're good to go. But you will have to go through the adjustment procedure contained in the manual. I've replaced 2 and they're still working fine
?
Take pictures before the disassembly, it really helps.
?
73
Geoff
VK3ZGW
?
?
|
Richard, That sounds great. I'm an electronics cooling nut. I have extra fans, or stronger fans on just about everything. I have an Icom 746 with a fan that blows air into the vent on the top 100% of the time. A lot of hams do not like to hear fans but that doesn't bother me. Heck there's always a fan running in the shack anyway. I'll let you know how it goes. It looks like the toughest part is all the unsoldering. 73, Bob W4JFA
On Mon, Jul 22, 2024 at 7:41?AM RICHARD OLSON via <richard777= [email protected]> wrote:
Hi Bob
?
The 7000 notoriously runs hot. I have had mine for over 10 years and like a Timex watch it takes a licking and keeps on ticking. I keep a small fan blowing from the back on the heat sink towards the front.?
?
Richard w3rlo
?
?
?
?
Geoff, Thank you. I'll start on the radio Monday USA eastern time. I don't know if the new board has the resistor or not but maybe I can add one if it doesn't. If the added resistor is the only change then I'm sure there's no reason why I can't add one. I've done things like that B4. My gut feeling is if I can add more heat sinking, that will help. Not sure until I see it.?
I'll?keep you posted.
Bob W4JFA?
Hi Bob,
?
The driver pcb is not too difficult to get out and you will see the signs if it was the cause of the smoke. If your new driver board has the new resistor fitted you're good to go. But you will have to go through the adjustment procedure contained in the manual. I've replaced 2 and they're still working fine
?
Take pictures before the disassembly, it really helps.
?
73
Geoff
VK3ZGW
?
?
|
Hi Bob
?
The 7000 notoriously runs hot. I have had mine for over 10 years and like a Timex watch it takes a licking and keeps on ticking. I keep a small fan blowing from the back on the heat sink towards the front.?
?
Richard w3rlo
?
?
On 07/21/2024 9:13 PM EDT Bob <w4jfabob@...> wrote:
?
?
Geoff, Thank you. I'll start on the radio Monday USA eastern time. I don't know if the new board has the resistor or not but maybe I can add one if it doesn't. If the added resistor is the only change then I'm sure there's no reason why I can't add one. I've done things like that B4. My gut feeling is if I can add more heat sinking, that will help. Not sure until I see it.?
I'll?keep you posted.
Bob W4JFA?
Hi Bob,
?
The driver pcb is not too difficult to get out and you will see the signs if it was the cause of the smoke. If your new driver board has the new resistor fitted you're good to go. But you will have to go through the adjustment procedure contained in the manual. I've replaced 2 and they're still working fine
?
Take pictures before the disassembly, it really helps.
?
73
Geoff
VK3ZGW
?
?
|
Geoff, Thank you. I'll start on the radio Monday USA eastern time. I don't know if the new board has the resistor or not but maybe I can add one if it doesn't. If the added resistor is the only change then I'm sure there's no reason why I can't add one. I've done things like that B4. My gut feeling is if I can add more heat sinking, that will help. Not sure until I see it.? I'll?keep you posted. Bob W4JFA?
Hi Bob,
?
The driver pcb is not too difficult to get out and you will see the signs if it was the cause of the smoke. If your new driver board has the new resistor fitted you're good to go. But you will have to go through the adjustment procedure contained in the manual. I've replaced 2 and they're still working fine
?
Take pictures before the disassembly, it really helps.
?
73
Geoff
VK3ZGW
|
Hi Bob,
?
The driver pcb is not too difficult to get out and you will see the signs if it was the cause of the smoke. If your new driver board has the new resistor fitted you're good to go. But you will have to go through the adjustment procedure contained in the manual. I've replaced 2 and they're still working fine
?
Take pictures before the disassembly, it really helps.
?
73
Geoff
VK3ZGW
|
Hello, I just joined this group. I do not have a 7000 but am going to work on one for a friend. It let the smoke out so by reading it's a very good possibility that it's the driver board. My friend has a new board! Yes a new one! How lucky is that!
I haven't seen inside this radio yet but I should have it this evening.
Without seeing it, my gut feeling is more heat sinking is in order if it's physically possible.
I also read that Icom added a resistor to drop the current to that FET.
Any hints and opinions are welcome.
73, Bob W4JFA (near Charlotte, NC)
|
Re: Hf power out barely detectable
Yes I have tried all modes on hf with no?success.? The driver should be good since vhf and uhf work correctly.? I have ordered new finals so we will see if that corrects the problem. Thanks for your help
Have you tried different modes?? Yes, it is possible, but I would look at the driver first.
|
|
|
Re: Hf power out barely detectable
Yes, it is possible, but I would look at the driver first.
|
Re: Fair Price for IC-7000 Separation Cable?
I use a DM5AL separation kit. Works great.?
--
73,?Jim
|
Hf power out barely detectable
I purchased a 7K with no power out on hf. ?Vhf/uhf are good. ?Receiver is in excellent condition. ?I have set the driver and finals bias and are good. ?Gate voltage of the finals measures 2.4V. ?Power setting is 100% but measures negligible power into a dummy load. ?Is it possible the finals are bad?
|
Re: SWR Meter on 2m / 70cm
Hi the swr meter does not work on VHF/UHF
Dave 2E0DMB
I was at another fellow hams residence and since he had the equipment, I thought it would be a good idea to double check my antenna, coax etc.? What is confusing is that he has both an old-school power meter (which was showing significant return power on my antenna run) and antenna analyzer (also showing higher SWR at needed frequencies), neither which coincide with what shows on the ic-7000 radio display SWR meter when I xmit.
Then I read this in the manual....
The IC-7000 has a built-in circuit for measuring antenna SWR—no external equipment or special adjustments are necessary.? The IC-7000 can measure SWR in 2 ways - spot measurement and plot measurement.? The SWR can only be measured on [ANT1] connector, in the HF/50 MHz bands when an antenna is connected. However, when a 144/430 MHz antenna is connected to [ANT2], the SWR cannot be measured.
Does this mean that when transmitting on 2m/70cm, even though the SWR meter "moves", it is not really accurate or reading anything meaningful?? ?I've been assuming I had a good antenna run, but now I am doubtful (though it does seem to be working).? I realize that the "graph" SWR meter does not work on 2m/70cm, but always assumed the spot meter was true...
I've ordered a NanoVNA to do some additional testing.? Any other reasons you can suggest that would cause the discrepancies?? ?I did the standard multimeter tests for continuity etc while bending, twisting, and moving the coax etc...everything "seems" OK at the DC level.??
Grant? VA6GT
|
I was at another fellow hams residence and since he had the equipment, I thought it would be a good idea to double check my antenna, coax etc.? What is confusing is that he has both an old-school power meter (which was showing significant return power on my antenna run) and antenna analyzer (also showing higher SWR at needed frequencies), neither which coincide with what shows on the ic-7000 radio display SWR meter when I xmit.
Then I read this in the manual....
The IC-7000 has a built-in circuit for measuring antenna SWR—no external equipment or special adjustments are necessary.? The IC-7000 can measure SWR in 2 ways - spot measurement and plot measurement.? The SWR can only be measured on [ANT1] connector, in the HF/50 MHz bands when an antenna is connected. However, when a 144/430 MHz antenna is connected to [ANT2], the SWR cannot be measured.
Does this mean that when transmitting on 2m/70cm, even though the SWR meter "moves", it is not really accurate or reading anything meaningful?? ?I've been assuming I had a good antenna run, but now I am doubtful (though it does seem to be working).? I realize that the "graph" SWR meter does not work on 2m/70cm, but always assumed the spot meter was true...
I've ordered a NanoVNA to do some additional testing.? Any other reasons you can suggest that would cause the discrepancies?? ?I did the standard multimeter tests for continuity etc while bending, twisting, and moving the coax etc...everything "seems" OK at the DC level.??
Grant? VA6GT
|
Re: Fair Price for IC-7000 Separation Cable?
This aftermarket alternative worked well for me at a reasonable price.
73,
Paul WA1VEI?
|
Re: Fair Price for IC-7000 Separation Cable?
More Info at
Marcus Grampp via <marcus.grampp= [email protected]> schrieb am Sa., 6. Juli 2024, 16:33:
Hi folks,
I sell a separation kit from dm5al for $60 + shipping.
73
Marcus dl3nc
Larry Macionski via <am_fm_radio= [email protected]> schrieb am Sa., 6. Juli 2024, 16:07: There was a German ham who was making a substitute that uses a CAT5 cable... It is in the past archived messages here. Maybe 18 months ago I purchased one and It cost me around $80 delivered Germany to Kansas
Larry W8LM
|
Bob
WI6X Jim