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Date
Re: How and where do i check the filters

 

Yes it goes into tx. believe it or not i can trigger a local repeater even with no output! Strange hey! I will look at the mainboard.
Re: How and where do i check the filters

 

Thanks for sharing your situation.? I looked at your info on QRZ and you have a nice station.? The IC-7000 isn't easy to troubleshoot!

Your latest J101 IF measurements looks like the unit isn't going into transmit mode.? Does the TX LED on the control panel come on when you key it in CW mode?

Since your unit receives okay, the IF circuits seem to be working.? Most of it is the same for RX & TX modes, except the pre-amps are bypassed in TX.

It's difficult to tell you where to look next.? If the TX LED is on when you keyed the unit to measure the signal levels, then the problem is probably on the MAIN board, which is harder to troubleshoot and repair.? Is there a ham in a local radio club perhaps that has experience working on Icom radios???

The 7000 is old enough that it probably isn't worth the cost of sending to a repair shop for this type of problem.? I know you have invested a lot of time and effort into it so far and? wish I could be of more help....
Re: How and where do i check the filters

 

Ment to add i am disabled on the complete right hand side and have very litteled electronic imformation.
Re: How and where do i check the filters

 

The voltages are as follows:
J101 Coax
from Main IF
!.840 cw 3.80mV
3.788 cw 3.20mV
7.100 cw 2.8mV
14.200 cw 3.4mV
28.400 cw 3.0mV
146.00 cw is 3.2 mV

I think there is something wrongHere!
Re: How and where do i check the filters

 

Here's the manual for the probe that shipped with that model:??
On page 4 is the parts list.? You should remove parts 2 & 3, then attach part # 5 (ground spring) to the ground barrel of the probe.? Then take measurements of the IF output, placing the ground spring on the nearest ground trace on the PCB.? This will eliminate the background noise picked up by the wire ground clip.

I don't understand your comment:? "i can see each ptest the voltage jumps!"

Are you able to measure the current on the DC power cable while doing the idle current adjustment steps?? I can't provide any troubleshooting help without basic information....

Steve, W3AHL
Re: How and where do i check the filters

 

Hi i am using a Rigol ds1104b with the probe hope that helps. i can see each ptest the voltage jumps!
Re: How and where do i check the filters

 

None of the voltages you measured are close to what I normally see.? The first set of levels from the IF should vary with frequency, but yours don't.? They look like just noise levels.? What instrument are you using to measure them?? Do you see a valid RF signal waveform with a peak that moves when you change the frequency dial a little?? Are you using a scope probe with a 4" ground lead?? That would account for the constant RF noise level.? Unfortunately I am at my home in Washington state, but all of my test equipment is at my home in New Mexico, so I can't send you a picture of the correct probe grounding method.

When you say you cannot adjust the output via the service menu, what do you see when you try to adjust the driver and final idle currents.? That is a purely static DC bias adjustment that only measures the DC supply current coming into the radio using an accurate DC shunt and voltmeter or a clamp-on DC current meter.? Even if you cannot adjust anything, it would perhaps be useful to know what currents you measure in steps 2-7 anyway.? That will indicated if the bias control circuits and FET's are alive.

It's hard to troubleshoot remotely, so providing a little more detail of what you are doing would be helpful.? I have no idea what your repair experience is and what equipment you are using.? Sometimes just misunderstanding one step in the adjustment procedures can make all the difference....
Re: How and where do i check the filters

 

The voltages are as follows:
J101 Coax
from Main IF
!.840 cw 136mV
3.788 cw 144mV
7.100 cw 152mV
14.200 cw 160mV
28.400 cw 128mV
146.00 cw is 168 mV

Driver Input
J101 to J103
!.840 cw 184mV
3.788 cw 183mV
7.100 cw 176mV
14.200 cw 144mV
28.400 cw 144mV
146.00 cw is 144 mV

Driver
Output J102
to j104
!.840 cw 176mV
3.788 cw 183mV
7.100 cw 176mV
14.200 cw 144mV
28.400 cw 144mV
146.00 cw is 144 mV

ANT1 At
Bottom of
PA
!.840 cw 176mV
3.788 cw 183mV
7.100 cw 176mV
14.200 cw 144mV
28.400 cw 144mV
146.00 cw is 144 mV

OK Whats wrong!
Re: How and where do i check the filters

 

Sorry Steve I cannot adjust the output via the service menu. it is very strange!
Re: How and where do i check the filters

 

Andrew,? Are you able to correctly adjust all of the Drive/Final Idling Currents?? For adjusting TX power output, using the correct mic audio level and frequency as specified in procedure is important.? What are you using to measure the idle currents?? What are the actual measured currents in the 4-4 Transmitter Adjustments, steps 2-7?

Are you able to verify the TX voltages by stage as given in :??/g/ic7000/files/7K%20TX%20RF%20Levels%203.pdf? ?? Make sure your radio settings match those in the first paragraphs.? It is important to have a ground spring clip on the probe's ground barrel (instead of a normal ground wire clip) to eliminate noise coupling and get accurate readings.

Since all bands appear to have a problem, it is unlikely to be a problem with high or low pass filters or their switching diodes & relays.? But you can verify them by seeing that the input signal level is okay per the above document, then checking the signal level on the output of the filter.? The switching diodes and their control voltages are more likely to be a problem than the actual filter circuit.

Steve, W3AHL
Re: How and where do i check the filters

 

yes all voltage supplies where checked
Re: How and where do i check the filters

 

Hi, did you test the transistors
Or did you just change them hopping that this would?work?, did you test for voltage supply on the transistors,
Dave

On Thu, 18 Jan 2024, 11:43 ZS2PA Andrew Prideaux, <andrew.prideaux@...> wrote:
Guys is there a way i can check the filters. My rig Rx just fine but now out put.
1) the main transistor has been replaced
2) the small transistrs have been replaced (for the transmition)
3) the rigs power cannot be ajusted via the service menu
4) I get an output in freq as a output on the J101

How and where do i check the filters

 

Guys is there a way i can check the filters. My rig Rx just fine but now out put.
1) the main transistor has been replaced
2) the small transistrs have been replaced (for the transmition)
3) the rigs power cannot be ajusted via the service menu
4) I get an output in freq as a output on the J101
Re: Preparing to somewhat dissamble IC7000 control head

 

The second new 7000 I bought started to have screen problems.? It would show static but never cut off.? I send it back under warranty to Icom twice but it never misbehaved while there.? I got it back and it started it again after a day or so.? I called Icom and spoke to Dan, the repair supervisor, and asked him to send me a complete set of ribbon cables.? One of the 2 cables that plugged into the front of the PA board was the culprit.? One of the foils had de-laminated and pealed back when it was assembled.? 14 years later and it still works.
You might be able to reach in and push it on the stiffeners to see if there is a problem with a cable.? Normally, you have to de-solder the coax connectors and the finals to remove the PA board to get to either of those.? I made a thin pair of tweezers with rubber grippers to prevent damage.? There can't be much more than a 3mm gap for them so it will be tight to do what I did.? There are other cables that can cause this but these two are the most difficult.
Good luck,
Robert
Found for sale on eham.net

 



Not by me, I'm just sharing.

Danny
Re: Icom to ATAS-100 automatic controller project #all

 

- need to dig into atu icom connector operations to trigger ant from radio and radio from interface?
?
A good description of the _START and _KEY signal interaction and status between the Icom Molex TUNER port, and the Icom AH4 and Icom compatible LDG autotuners, is on? page 6 and 7 of???
?
FYI: With the inexpensive Chinese ATU-100 autotuners, you can interface to an Icom by connecting:?
?a 680 ohm resistor between the ATU-100 "B" header to Icom Tuner port _START pin, and?
?a 680 ohm resistor between the ATU-100 "A6" via to the Icom Tuner port _KEY pin, (plus connect +12v and GND).?
?
A description of the ATAS-100 operation:??
?
?
?
Re: Compatible Tuner with IC 7000

 

i DON'T BELIEVE THAT THE ic-7000 is compatible with the ATAS (Yaesu). The Yaesu radios have a DC output voltage that changes level to drive up and down or stop. The SWR meter and control circuit in the Yaesu controls the ATAS antenna and just having an SWR meter will not work for you.
One of the other screwdriver antennas could be used with either and UP/ DOWN switch or one of the screwdriver control boxes.
Most of the screwdriver antennas can be tuned for maximum noise on the receiver and be very close to the final SWR. A little fiddling will put you right on the money.
Best wishes with your radio

JD Barron.
Re: Compatible Tuner with IC 7000

 

I have used Icoom AT180 tuner with the 7000, 703 and 706 for many years with great success!
73 de K9UTQ


On Jan 9, 2024 at 16:21, k2rrx via groups.io <k2rrx@...> wrote:

Thanks to all who replied? Larry R., Allison, Wayne, Dom, Rick, Max, John, JD, Rubie, and Larry M.
?? What a group and lots of great info.
? I think I have come up with a solution of either a tuner such as an Icom Ah series at the base of the antenna, or I might try the ATAS and since all I am missing is the SWR meter I may put one inline and mount it on top of the rig. This way I can tune for lowest SWR with the feature built into the radio. Since I am using the 7000 for repeater work I have room for the meter on top and I will report back on how this whole arrangement works.
?? I am attaching a photo of the first mount, it has since been modified of course lol but I also modified the shift lever for more clearance and brought the radio even closer.
? The MFJ control box is now mounted below the 7000 within easy reach and all I need is a small bracket to mount the meter and I will take a photo when thats done and hopefully get on the air soon.
?? My old setup on another truck was a 10 foot screwdriver type antenna with a serious mount that had a drive motor and coil assembly that was just great but heavy.? I made worldwide contacts with that setup and there is a photo on my QRZ page.
?? I'm trying to make things simpler and take advantage of the quick removability and re install of the ATAS.
??? Thanks again to everyone and I will post photos of the finished mess!
? 73
Phil?? K2RRX

Sent with secure email.

On Sunday, January 7th, 2024 at 12:45 PM, k2rrx via groups.io <k2rrx@...> wrote:

Greetings and Happy new year.
?? I recently needed to change vehicles and I am looking to scale down the whole setup inside and outside the vehicle.
? I had a tri bander for 2m, 220, and 440 and simply used a mag mount for that antenna.
?I have decided to just run one rig to simplify things.
? For HF I have an Icom 7000. As most of you will agree this is an awesome radio..I can almost run with the big dogs, and certainly sound as good as most 100 watt stations.
The 7000 is setup now for 2m and 440 machines in my local area and working well, for HF I was contemplating either an ATAS or maybe one of those Icom tuners with lets say a 100 inch whip or thereabouts.
? Anyone have experience with either of these setups?
I have been told that the MFJ controller for the ATAS needs a modification to be compatible with the 7000, and once done it does not show the SWR meter during tuning.
I'm thinking maybe using the MFJ control to key the radio after switching to CW so I can tune via the SWR meter. All of this fooling around to tune basically just puts me back to the system i used before.
?? Possibly an Icom tuner at the base of the antenna with a reasonably sized whip may be so much easier.
?? Any Thoughts?
?? Thanks in advance
Phil K2RRX

Sent with secure emal


Re: Compatible Tuner with IC 7000

 

Thanks to all who replied? Larry R., Allison, Wayne, Dom, Rick, Max, John, JD, Rubie, and Larry M.
?? What a group and lots of great info.
? I think I have come up with a solution of either a tuner such as an Icom Ah series at the base of the antenna, or I might try the ATAS and since all I am missing is the SWR meter I may put one inline and mount it on top of the rig. This way I can tune for lowest SWR with the feature built into the radio. Since I am using the 7000 for repeater work I have room for the meter on top and I will report back on how this whole arrangement works.
?? I am attaching a photo of the first mount, it has since been modified of course lol but I also modified the shift lever for more clearance and brought the radio even closer.
? The MFJ control box is now mounted below the 7000 within easy reach and all I need is a small bracket to mount the meter and I will take a photo when thats done and hopefully get on the air soon.
?? My old setup on another truck was a 10 foot screwdriver type antenna with a serious mount that had a drive motor and coil assembly that was just great but heavy.? I made worldwide contacts with that setup and there is a photo on my QRZ page.
?? I'm trying to make things simpler and take advantage of the quick removability and re install of the ATAS.
??? Thanks again to everyone and I will post photos of the finished mess!
? 73
Phil?? K2RRX

Sent with secure email.

On Sunday, January 7th, 2024 at 12:45 PM, k2rrx via groups.io <k2rrx@...> wrote:

Greetings and Happy new year.
?? I recently needed to change vehicles and I am looking to scale down the whole setup inside and outside the vehicle.
? I had a tri bander for 2m, 220, and 440 and simply used a mag mount for that antenna.
?I have decided to just run one rig to simplify things.
? For HF I have an Icom 7000. As most of you will agree this is an awesome radio..I can almost run with the big dogs, and certainly sound as good as most 100 watt stations.
The 7000 is setup now for 2m and 440 machines in my local area and working well, for HF I was contemplating either an ATAS or maybe one of those Icom tuners with lets say a 100 inch whip or thereabouts.
? Anyone have experience with either of these setups?
I have been told that the MFJ controller for the ATAS needs a modification to be compatible with the 7000, and once done it does not show the SWR meter during tuning.
I'm thinking maybe using the MFJ control to key the radio after switching to CW so I can tune via the SWR meter. All of this fooling around to tune basically just puts me back to the system i used before.
?? Possibly an Icom tuner at the base of the antenna with a reasonably sized whip may be so much easier.
?? Any Thoughts?
?? Thanks in advance
Phil K2RRX

Sent with secure emal

IMG_20231114_161241_01.jpg

Re: Loosing First LO when Changing Frequency

 

I think I have resolved the issue.? I noticed there was oscillation on the 3.3v line on the DDS.? I added a 10uf electrolytic cap to the 3R3V pad above DDS R9 and ground to stabilize the voltage.? That seems to have done the trick.? I'm able to spin the dial with no issues.? I should probably replace the MAIN C1802 cap next but I can't find an identical part.

73,
Bill N6HA

ic-7000 DDS test points.png

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