Last date on his website was 2021.
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I bought DL5AL’s OPC-1443 alternative separation kit in May 2021 for 50 Euros. Attached is the manual.
If I needed another, I’d buy one from him again.
Contact him for one.?
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Any updates on the opc-1443 or a substitute?
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MFJ-1708 T/R switch and SDR radio
Has anyone used the MFJ-1708 T/R switch and a SDR with the IC7000?? Also were they able to control the radio thru SDRPlay?
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Hi? I have ordered a new UHF fet, it should be with me in about 2weeks time, I will let?you all know when it arrives and I have fitted it, I hope it will not be a fake, Thanks all for?your help Thanks Dave 2E0DMB
I agree with Steve. ? When you can not get 2.5 Ampere with UHF Adj, you have UHF mosfet with any issue. You can get power (often 15-25 watt….) but you need to fix with new mosfet RD60HUF. ? 73s Pasquale IW0HEX ? ? Inviato da per Windows ? Da: Steve W3AHL
Inviato: lunedì 25 aprile 2022 18:14
A: [email protected]
Oggetto: Re: [ic7000] in the adjustment menu i can not get the driver idle current down to the 1 amp setting ? Dave,
The UHF Idle Current definitely needs to be set to 2.5 amps for minimum distortion and spurious emissions.? I would suggest replacing the UHF PA FET.? There are other possible causes, but diagnosing them would be more difficult that replacing the PA.??
Setting the Idle Current establishes the FET's operating set point so that the positive and negative peaks of the RF signal aren't clipped.? There is no or minimal signal applied (thus the term "Idle"), so ALC should not be an issue.??
If you do replace the UHF PA FET, you will should perform all of the TX adjustments for the UHF band, since the newer FETs seem to have different gain than the original ones used, in my experience.? This requires applying the correct audio drive signal at seveal different levels.
Steve, W3AHL
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
I agree with Steve. ? When you can not get 2.5 Ampere with UHF Adj, you have UHF mosfet with any issue. You can get power (often 15-25 watt….) but you need to fix with new mosfet RD60HUF. ? 73s Pasquale IW0HEX ? ? Inviato da per Windows ? Da: Steve W3AHL
Inviato: lunedì 25 aprile 2022 18:14
A: [email protected]
Oggetto: Re: [ic7000] in the adjustment menu i can not get the driver idle current down to the 1 amp setting ? Dave,
The UHF Idle Current definitely needs to be set to 2.5 amps for minimum distortion and spurious emissions.? I would suggest replacing the UHF PA FET.? There are other possible causes, but diagnosing them would be more difficult that replacing the PA.??
Setting the Idle Current establishes the FET's operating set point so that the positive and negative peaks of the RF signal aren't clipped.? There is no or minimal signal applied (thus the term "Idle"), so ALC should not be an issue.??
If you do replace the UHF PA FET, you will should perform all of the TX adjustments for the UHF band, since the newer FETs seem to have different gain than the original ones used, in my experience.? This requires applying the correct audio drive signal at seveal different levels.
Steve, W3AHL
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Hi Steve Thanks for the info, Like?I said I am getting full output power now, but the data sheet does say it is a 60w item, so that is probably why I am still seeing 35w, but I do want it as it should be, so I will change the UHF output,? And and then do the set up as in the manual, Thanks for your help, Thanks Dave, 2E0DMB
On Mon, 25 Apr 2022, 17:15 Steve W3AHL, < w3ahl@...> wrote: Dave,
The UHF Idle Current definitely needs to be set to 2.5 amps for minimum distortion and spurious emissions.? I would suggest replacing the UHF PA FET.? There are other possible causes, but diagnosing them would be more difficult that replacing the PA.??
Setting the Idle Current establishes the FET's operating set point so that the positive and negative peaks of the RF signal aren't clipped.? There is no or minimal signal applied (thus the term "Idle"), so ALC should not be an issue.??
If you do replace the UHF PA FET, you will should perform all of the TX adjustments for the UHF band, since the newer FETs seem to have different gain than the original ones used, in my experience.? This requires applying the correct audio drive signal at seveal different levels.
Steve, W3AHL
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Dave,
The UHF Idle Current definitely needs to be set to 2.5 amps for minimum distortion and spurious emissions.? I would suggest replacing the UHF PA FET.? There are other possible causes, but diagnosing them would be more difficult that replacing the PA.??
Setting the Idle Current establishes the FET's operating set point so that the positive and negative peaks of the RF signal aren't clipped.? There is no or minimal signal applied (thus the term "Idle"), so ALC should not be an issue.??
If you do replace the UHF PA FET, you will should perform all of the TX adjustments for the UHF band, since the newer FETs seem to have different gain than the original ones used, in my experience.? This requires applying the correct audio drive signal at seveal different levels.
Steve, W3AHL
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Hi Steve
All the bands are now set to output power as specified, But as I could not set the 430mhz final Ideal current to 2.5amp above the 00 setting, as I could only get 400ma over, but I am now getting 35w out at 13.8v ,
As I could only set to 400ma final Ideal current on 430mhz ,do you think it is not in the right class for SSB, it does sound good on another Rx,?
What do you think would do this, would it be the ALC setting,, I might look at this tomorrow, thanks again for your help,?
Thanks Dave 2E0DMB
?
On Sun, 24 Apr 2022, 17:52 Steve W3AHL, < w3ahl@...> wrote:
Dave,
Set the Driver Idle Current adjustment reading to "00", then note the current draw.? Rotate the? dial to INCREASE the current draw by 1.0 amp above the previous reading.? That establishes the proper Driver Idle Current, assuming the adjustment circuits are working correctly.
This only sets the Class A Driver idle current -- it has nothing to do with the output FET's operating points, which are fixed.
The UHF PA FET is often weakened by excessive (>35 VDC) voltage spikes on the 12 VDC power input when operating mobile, due to counter EMF spikes from the engine's starter motor.? In my experience though this usually results in the UHF power output dropping to 5-10 watts or zero.
I would do the complete Transmitter adjustment procedures before attempting any troubleshooting of varying transmitter power output by band.? ?It may bring all the bands close to specification.? If not, it may lend more insight to where the problem is.? If multiple bands are below the specified output level after correct adjustments, then the Driver (Q504) may be at fault.
It is important to verify that the "12 VDC" input supply is 13.8 volts at full TX PO output and capable of supplying 25+ amps before doing TX adjustments.? More importantly, verify that the supply voltage seen by the circuits inside the unit are > 13.3 VDC under full load by measuring across the TUNER port pins 3-4.? A common problem is excessive voltage drop across the factory supplied fuse holders on the input power cable.? These fuse holders are a poor design and should be replaced with 30 amp automotive style fuse holders.
Steve, W3AHL
?
?
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Hi Steve Yes I have just realised what I was doing was incorrect, I have just done it correctly, I could not get the 430m final ideal current to 2.5a above the 00 , reading, I could only get it 400ma above, all the other bands adjusted at per the manual and I am now getting the 35w at 13.8v on UHF ,it is also more stable It's good to see that you are still about on all of the forums, I still have my Kenwood ts2000 ,I got this to put in my car, I will fit a 15v TVS diode as I do have some, Thanks Dave 2E0DMB
On Sun, 24 Apr 2022, 17:52 Steve W3AHL, < w3ahl@...> wrote: Dave,
Set the Driver Idle Current adjustment reading to "00", then note the current draw.? Rotate the? dial to INCREASE the current draw by 1.0 amp above the previous reading.? That establishes the proper Driver Idle Current, assuming the adjustment circuits are working correctly.
This only sets the Class A Driver idle current -- it has nothing to do with the output FET's operating points, which are fixed.
The UHF PA FET is often weakened by excessive (>35 VDC) voltage spikes on the 12 VDC power input when operating mobile, due to counter EMF spikes from the engine's starter motor.? In my experience though this usually results in the UHF power output dropping to 5-10 watts or zero.
I would do the complete Transmitter adjustment procedures before attempting any troubleshooting of varying transmitter power output by band.? ?It may bring all the bands close to specification.? If not, it may lend more insight to where the problem is.? If multiple bands are below the specified output level after correct adjustments, then the Driver (Q504) may be at fault.
It is important to verify that the "12 VDC" input supply is 13.8 volts at full TX PO output and capable of supplying 25+ amps before doing TX adjustments.? More importantly, verify that the supply voltage seen by the circuits inside the unit are > 13.3 VDC under full load by measuring across the TUNER port pins 3-4.? A common problem is excessive voltage drop across the factory supplied fuse holders on the input power cable.? These fuse holders are a poor design and should be replaced with 30 amp automotive style fuse holders.
Steve, W3AHL
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Re: in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Dave,
Set the Driver Idle Current adjustment reading to "00", then note the current draw.? Rotate the? dial to INCREASE the current draw by 1.0 amp above the previous reading.? That establishes the proper Driver Idle Current, assuming the adjustment circuits are working correctly.
This only sets the Class A Driver idle current -- it has nothing to do with the output FET's operating points, which are fixed.
The UHF PA FET is often weakened by excessive (>35 VDC) voltage spikes on the 12 VDC power input when operating mobile, due to counter EMF spikes from the engine's starter motor.? In my experience though this usually results in the UHF power output dropping to 5-10 watts or zero.
I would do the complete Transmitter adjustment procedures before attempting any troubleshooting of varying transmitter power output by band.? ?It may bring all the bands close to specification.? If not, it may lend more insight to where the problem is.? If multiple bands are below the specified output level after correct adjustments, then the Driver (Q504) may be at fault.
It is important to verify that the "12 VDC" input supply is 13.8 volts at full TX PO output and capable of supplying 25+ amps before doing TX adjustments.? More importantly, verify that the supply voltage seen by the circuits inside the unit are > 13.3 VDC under full load by measuring across the TUNER port pins 3-4.? A common problem is excessive voltage drop across the factory supplied fuse holders on the input power cable.? These fuse holders are a poor design and should be replaced with 30 amp automotive style fuse holders.
Steve, W3AHL
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in the adjustment menu i can not get the driver idle current down to the 1 amp setting
Hi,
in the adjustment menu i can not get the driver idle current down to the 1 amp setting? the lowest it will go to is 2.56 amps
but it could be some leakage on any of the other output transistors ??
i get over 100w on all hf, but only 84.7w on 6m, and 44w on vhf and uhf starts at 34w but then drops very fast to 27w, the temp gauge?
rises high very fast when on uhf, I am using a calibrated Bird 4391 to do these tests in to a very good 50ohm dummy load,
but i suppose the best way to test is to test the current were it goes in to each output trany, what do you all think,
Thanks Dave 2E0DMB
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Re: what power are users getting out of there radios on uhf
Are there any variable caps in the TX lineup
that MIGHT be touched up to equalize the
output across the whole band?? VERY small
adjustments to avoid screwing EVERYTHING
up if you mess with it!
?
73 - Mac, K2GKK/5
Since 30 Nov 1953
k2gkk hotmail com
Oklahoma City, OK
USAF & FAA, Retired
Icom - Since 1972
(IC-21 was first one)
toggle quoted message
Show quoted text
35 in the 440 band but 22-25 on 420-425 MHz.
73 de: WB6JKV?
Sent on the fly via my S21+5G & Verizon please ignore typos, errors etc
-------- Original message --------
From: davebb123456 <davidbrowne76@...>
Date: 4/23/22 7:15 AM (GMT-08:00)
Subject: [ic7000] what power are users getting out of there radios on uhf
Hi what power are users getting out of there radios on uhf, are they seeing 35w as per icom specs,
Thanks Dave 2E0DMB
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Re: what power are users getting out of there radios on uhf
35 in the 440 band but 22-25 on 420-425 MHz.
73 de: WB6JKV?
Sent on the fly via my S21+5G & Verizon please ignore typos, errors etc
toggle quoted message
Show quoted text
-------- Original message -------- From: davebb123456 <davidbrowne76@...> Date: 4/23/22 7:15 AM (GMT-08:00) Subject: [ic7000] what power are users getting out of there radios on uhf
Hi what power are users getting out of there radios on uhf, are they seeing 35w as per icom specs, Thanks Dave 2E0DMB
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what power are users getting out of there radios on uhf
Hi what power are users getting out of there radios on uhf, are they seeing 35w as per icom specs,
Thanks Dave 2E0DMB
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Re: i can not get my radio in to adjustment mode
Thanks ,I always like updates, some times I read a load of posts on forums, and then I do not find out what has happened, There was a lot of good ideas, so I had to let all know how it went, Thanks Dave 2E0DMB
Well Done!!! Thanks for the updates.
Hoffy - VK4OY
On 19/04/2022 4:47 am, davebb123456
wrote:
Hi have not done the driver heatsink compound yet, but i have now
got the remote socket working correctly and i can put the radio
into Adjust Mode,?
Thanks for all of your help and ideas,
Thanks Dave 2E0DMB
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Re: i can not get my radio in to adjustment mode
Well Done!!! Thanks for the updates.
Hoffy - VK4OY
On 19/04/2022 4:47 am, davebb123456
wrote:
toggle quoted message
Show quoted text
Hi have not done the driver heatsink compound yet, but i have now
got the remote socket working correctly and i can put the radio
into Adjust Mode,?
Thanks for all of your help and ideas,
Thanks Dave 2E0DMB
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Re: i can not get my radio in to adjustment mode
Hi have not done the driver heatsink compound yet, but i have now got the remote socket working correctly and i can put the radio into Adjust Mode,?
Thanks for all of your help and ideas,
Thanks Dave 2E0DMB
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Re: i can not get my radio in to adjustment mode
UPDATE
i have found the problem , with the civ not working to get into the setup menu, inductor EP2405 is sticking up in the air, it is only making contact with the cive socket ground side, and not connected to the track that it should be, it looks that some one has done this, (maybe to stop some one playing with the menu , and tacking the radio back to them for repair, only an idea, i am going to now correct this, , I will keep you all posted,
Thanks Dave 2E0DMB
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Re: i can not get my radio in to adjustment mode
I have always put some heat sink compound on it, just to be on the safe side.?
To me keeping it as cool as possible is a good thing as I have seen pictures of the board charred and unusable. I have not seen this myself, however.?
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WI6X Jim
Steve W3AHL
Hoffy