Date   

Re: [IC-7000] uploading photos

John Smith
 

I sent you mail re asking price of radio!
John

On 6 Jan 2016 14:44, "david.browne7@... [ic7000]" <ic7000@...> wrote:
 

Hi I am trying to upload photos of my ic-7000,

I selected the photos, 32 of them and uploaded them,

the page is saying there is no photos

anyone know why this is,

Thanks Dave 2E0DMB


Re: [IC-7000] Im Selling my ic-7000

Milo Austin
 

Well Dave, I am sorry to hear the circumstances of your selling.  It is certainly understandable.  However, my own experience over many years has been, it seems nearly every time I got rid of something (most anything), I deeply regretted it later on, sometimes years later.  I wish you the best.

Milo,

KF5GCF

 

 

On 06-01-2016 08:02, david.browne7@... [ic7000] wrote:

 

 

Hi I am Selling my Icom ic-7000

ICOM IC-7000 HF-VHF/UHF ALL MODE TRANSCEVER WITH USB LEAD REMOTE MOUNTING KIT

 The Radio Is in full working order and very good condition

With remote Head fitting Kit,Mobile Mounting Bracket,manual, box for the radio,

I am only selling  it as I am out of work,

I am in the united kingdom

Thanks Dave 2E0DMB


uploading photos

davebb123456
 

Hi I am trying to upload photos of my ic-7000,

I selected the photos, 32 of them and uploaded them,

the page is saying there is no photos

anyone know why this is,

Thanks Dave 2E0DMB


Temperature question

Juliean Galak
 

Hello all!


I'm a new ham and just bought an IC-7000 off ebay for use in the car. I'm wondering - how hot does the rig get, and how much airflow does it need? Is it safe to install in a small, fully enclosed compartment, or does it need good airflow? I anticipate using it primarily for HF-SSB and VHF-FM.


Thanks,
Juliean
KD2JPF


Im Selling my ic-7000

davebb123456
 

Hi I am Selling my Icom ic-7000

ICOM IC-7000 HF-VHF/UHF ALL MODE TRANSCEVER WITH USB LEAD REMOTE MOUNTING KIT

 The Radio Is in full working order and very good condition

With remote Head fitting Kit,Mobile Mounting Bracket,manual, box for the radio,

I am only selling  it as I am out of work,

I am in the united kingdom

Thanks Dave 2E0DMB


Re: [IC-7000] no audio from onboard speaker?

D C *Mac* Macdonald
 

My guess about a "cause" would be accidental excessive 
side pressure on the inserted external speaker plug 
which "broke" the internal switching mechanism. 
 
These miniature jacks have proven to be quite fragile!
 
* * * * * * * * * * *
* 73 - Mac, K2GKK/5 *
* (Since 30 Nov 53) *
* Oklahoma City, OK *
* USAF, Ret'd 61-81 *
** FAA, Ret'd 94-10 *
* * * * * * * * * * *
 
 

 


From: ic7000@...
To: ic7000@...
Date: Fri, 1 Jan 2016 15:24:55 -0800
Subject: Re: [IC-7000] no audio from onboard speaker?
 

My guess... gunk inside the connector.  When a plug is inserted,
the plug holds open two contacts that connect the audio signal
to the internal speaker.  I would suggest a small diameter
(bottle style) brush with a very slight amount of DeOxit run
inside the connector, with the rig turned off.

Phil
N6OMM

   

On 1/1/2016 3:06 PM, 'WW3S' ww3s@... [ic7000] wrote:
 

Not sure what I did, but I have no audio from the built in
speaker....if I plug a external speaker into the headphone
jack works ok.....any idea what went wrong?
 
    

Posted by: Phillip Potter
 


Re: [IC-7000] no audio from onboard speaker?

Phillip Potter
 

My guess... gunk inside the connector.  When a plug is inserted, the plug holds open two contacts that connect the audio signal to the internal speaker.  I would suggest a small diameter (bottle style) brush with a very slight amount of DeOxit run inside the connector, with the rig turned off.

Phil
N6OMM

On 1/1/2016 3:06 PM, 'WW3S' ww3s@... [ic7000] wrote:
 

Not sure what I did, but I have no audio from the built in speaker....if I plug a external speaker into the headphone jack works ok.....any idea what went wrong?
 


Re: no audio from onboard speaker?

Steve W3AHL
 

That generally indicates:
  1. The internal speaker is defective or unplugged from the Main board.
  2. More likely, one of the external audio receptacles is damaged.  Either the internal switch contact is bent or one of the SMT leads was pulled loose from the PCB, due to excessive force on the plug or cable.
The receptacles are only availabe in the US from Icom.

Steve, W3AHL

---In ic7000@..., <ww3s@...> wrote :

Not sure what I did, but I have no audio from the built in speaker....if I plug a external speaker into the headphone jack works ok.....any idea what went wrong?
 


no audio from onboard speaker?

WW3S <ww3s@...>
 

Not sure what I did, but I have no audio from the built in speaker....if I plug a external speaker into the headphone jack works ok.....any idea what went wrong?
 


Re: off subject question

Steve W3AHL
 

Sign up for:

https://uk.groups.yahoo.com/neo/groups/SDRSharp/info 


I used it for a few years, but not recently.

Steve, W3AHL

---In ic7000@..., <jcrisco@...> wrote :

non-7000 question...
setting up a SDR doggle with HDSDR and SRDSHARP (#SDR)..
does anyone have experience with either of these programs.
if so , can you contact me offline..
thanks  73s

jim crisco
wa4yiz
jcrisco@...

 


off subject question

jim crisco WA4YIZ
 

non-7000 question...
setting up a SDR doggle with HDSDR and SRDSHARP (#SDR)..
does anyone have experience with either of these programs.
if so , can you contact me offline..
thanks  73s

jim crisco
wa4yiz
jcrisco@...


Re: [IC-7000] Oscillation

Ed G
 

I have 4 switching supplies for ham use. 3 are server power supplies & present no RFI whatsoever.
1 is 3 in series & 2 series stacks in parallel of adjusted 5VDC LED 100A supplies. It is all neatly packaged in an old PC case with a CLC filter that honestly wasn't needed. I use that to run a 1KX solid state amp & even at full tilt, bypassing the filtering, it is RFI quiet.

Ed


Re: [IC-7000] Oscillation

 

On 30/12/2015 1:12 PM, Alan Johnson little_pig_let_me_in@... [ic7000] wrote:
Hate to have to bring you into the 21st century, but there have been quiet smps's for some time now. 

I use a variety of smps and linear, and even with my EME system, there's no discernible difference with a quality smps. 

As with anything, buy cheap crap and you get crap performance.

I've used a shack SMPS since 2004.  Any noise it generates is well below the local noise floor on all bands, and voltage regulation has been spot on.   With the high frequency of hot days (35C+) up here in summer and a significant amount of 24x7 gear, it's not an environment I want to run a linear PSU in, too much hassle cooling the darned thing! 

-- 
73 de Tony VK3JED/VK3IRL
http://vkradio.com


Re: [IC-7000] Re: Oscillation

Howard Jones
 

james

I see this on my Anan 100D, the internal power supply produces a heat sensitive googlie in some situations. hasnt caused an operating problem but it is always there.

maybe filtering on your voltage regulators???

happy new year.

--
Regards

Howard vk3qa



Re: [IC-7000] Re: Oscillation

James Brock <jamesbrock@...>
 

Steve, thank you for taking the time to give me some suggestions regarding the repair of my IC-7000.  I have put on a 50 ohm load on the antenna input/output connector.  It didn't seem to make any difference.  

I copied and saved your full description so I will not overlook any of your suggestions. 

I am inclined to think the problem is within the unit.  When I can see the carrier swooshing through on the JT65 screen I see the carrier change directions.  It always start on the right side, the high frequency side. Then it slowly sweeps through to the low side, to the  left. I can hold my had over the cabinet fan on the top and the frequency will swoosh the other direction, to the right.  It is something that is heat sensitive.

I am inclined to think it is a grounding problem somewhere inside. 

Now about the heat sensitivity, could also be a slight change in voltage out of a series regulator. 

I am not giving up.  Most of my experience with electronics that last twenty-three years has been with TV UHF transmitters and translators.  I know a person can certainly get fooled.

Wishing you the very best and again thank you.
 
James Brock 541-868-5827


On Tuesday, December 29, 2015 5:58 AM, "w3ahl@... [ic7000]" wrote:


 
While it sounds like the spurious signal is originating inside the radio, based upon your description, I would suggest eliminating external sources first, since that is much simpler to do.  

Disconnect all cables that you can from the radio (mic, antenna, tuners, CI-V, external speaker, etc.)  If you can hear the signal in the speaker without the computer connected, disconnect the computer.

If possible, power the radio with a battery.  

Turn off the computer (if possible) and most important -- turn off all network routers and switches in the entire house.  The signal you describe sounds like what I've seen as RFI from LAN cables (especially 100 Mbps).

And finally, turn off power to the entire house.  If the computer must remain on to see the problem, disconnect it from any UPS unit and unplug the UPS.  I notice from Google Earth that there is an overhead power line at the back edge of your property.  Any problems with RFI from that?

If the above doesn't eliminate the birdie, then it probably is indeed inside the radio.  What is the serial # and year purchased (if original owner).  What frequencies have you seen the problem on?

There are several potential grounding issues inside the 7K.  Various changes to grounding springs, PCB artwork, circuit design, etc. have been made over the years, especially in radios made prior to late 2010.

Has the radio ever been returned to an Icom Service Center for repairs?  Did they make any updates while it was there?  There were some ground springs added to the PA board and also to the DDS board and one of the cables from the DDS to the Main board.  In this Group's Files area, look the "7K GROUNDING FINGERS.doc" from by me (s_ahlbom).  That shows what I believe to be the correct configuration.  Remove the covers and verify they are installed and bent up enough to contact the covers.  Also verify the pink pads are installed as shown.  They provide some thermal conductivity, but are also RF absorbers to attenuate noise.

Older radios also tend to have poor grounding from circuit boards to the cast aluminum due to surface oxidation of the aluminum.  This is especially a problem for some grounding springs/clips along the front edge of the Main board to the front of the chassis. The solution is to use 320 grit emery paper to remove the oxide from the aluminum, then scrub in Noalox to prevent it from reforming (as done to aluminum tubing on Yagis or aluminum wiring).

Another problem is with the metal fabric grounding pads used to ground the front of the Main board to the top cover.  Over time, heat causes the black foam inside the metal fabric to deteriorate, resulting in poor contact to the top cover.  If you squeeze the pad, it won't spring back well and black rubber particles will fall out when it is moved.

And finally, the small coax cables connecting the DDS to Main board and the Main board to the PA board can build up a rather hard crust of black tarnish on the silver plating of the connector, that can cause poor RF grounding of the shield.  The problem appears to be inside the outer shield of the connector where it is crimped onto the copper coax braid.  The only reliable fix for this is to replace the cable.  They are only a few dollars from Icom Parts in WA.

Steve, W3AHL

---In ic7000@..., wrote :

 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827



Re: [IC-7000] Oscillation

Alan Johnson <little_pig_let_me_in@...>
 

Hate to have to bring you into the 21st century, but there have been quiet smps's for some time now. 

I use a variety of smps and linear, and even with my EME system, there's no discernible difference with a quality smps. 

As with anything, buy cheap crap and you get crap performance. 

Alan VK3DXE


On 30 Dec 2015, at 07:02, Richard wn9ddv@... [ic7000] <ic7000@...> wrote:

 

There are people not using linear power supplies???

C. Richard Pumphrey
WN9DDV


On Dec 29, 2015, at 4:46 AM, Howard Jones howardjones155@... [ic7000] <ic7000@...> wrote:

 

Good advice from Don, try an alternative power supply, I have had this experience with switch mode supplies

reghrtads

Howard VK3QA

On Tue, Dec 29, 2015 at 10:47 AM, Don kb5kwv@... [ic7000] <ic7000@...> wrote:
 

You might want to look at your power supply. Especially if it is a switching type.

On 12/28/2015 3:33 PM, James Brock jamesbrock@... [ic7000] wrote:
 
 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827




--
Regards

Howard Jones



Re: [IC-7000] Re: Oscillation

Jeff <harrisjef820@...>
 

Hi

My IC7000 was subjected to 20 volts input due to a failure of the over voltage protection in the PSU. It was quite hot! It occurred 3 months ago and so far the rig appears to have suffered no I'll effects.

I am contacting you as you obviously have great experience of the 7k. Should I take any preventative measures or as the rig is working as expected and keep my fingers crossed.

Looking forward to you reply , does the 7k have in built ovp?

73 and have a Good 2016

Jeff G3LWM

On 29 Dec 2015 1:58 pm, "w3ahl@... [ic7000]" <ic7000@...> wrote:
 

While it sounds like the spurious signal is originating inside the radio, based upon your description, I would suggest eliminating external sources first, since that is much simpler to do.  


Disconnect all cables that you can from the radio (mic, antenna, tuners, CI-V, external speaker, etc.)  If you can hear the signal in the speaker without the computer connected, disconnect the computer.

If possible, power the radio with a battery.  

Turn off the computer (if possible) and most important -- turn off all network routers and switches in the entire house.  The signal you describe sounds like what I've seen as RFI from LAN cables (especially 100 Mbps).

And finally, turn off power to the entire house.  If the computer must remain on to see the problem, disconnect it from any UPS unit and unplug the UPS.  I notice from Google Earth that there is an overhead power line at the back edge of your property.  Any problems with RFI from that?

If the above doesn't eliminate the birdie, then it probably is indeed inside the radio.  What is the serial # and year purchased (if original owner).  What frequencies have you seen the problem on?

There are several potential grounding issues inside the 7K.  Various changes to grounding springs, PCB artwork, circuit design, etc. have been made over the years, especially in radios made prior to late 2010.

Has the radio ever been returned to an Icom Service Center for repairs?  Did they make any updates while it was there?  There were some ground springs added to the PA board and also to the DDS board and one of the cables from the DDS to the Main board.  In this Group's Files area, look the "7K GROUNDING FINGERS.doc" from by me (s_ahlbom).  That shows what I believe to be the correct configuration.  Remove the covers and verify they are installed and bent up enough to contact the covers.  Also verify the pink pads are installed as shown.  They provide some thermal conductivity, but are also RF absorbers to attenuate noise.

Older radios also tend to have poor grounding from circuit boards to the cast aluminum due to surface oxidation of the aluminum.  This is especially a problem for some grounding springs/clips along the front edge of the Main board to the front of the chassis. The solution is to use 320 grit emery paper to remove the oxide from the aluminum, then scrub in Noalox to prevent it from reforming (as done to aluminum tubing on Yagis or aluminum wiring).

Another problem is with the metal fabric grounding pads used to ground the front of the Main board to the top cover.  Over time, heat causes the black foam inside the metal fabric to deteriorate, resulting in poor contact to the top cover.  If you squeeze the pad, it won't spring back well and black rubber particles will fall out when it is moved.

And finally, the small coax cables connecting the DDS to Main board and the Main board to the PA board can build up a rather hard crust of black tarnish on the silver plating of the connector, that can cause poor RF grounding of the shield.  The problem appears to be inside the outer shield of the connector where it is crimped onto the copper coax braid.  The only reliable fix for this is to replace the cable.  They are only a few dollars from Icom Parts in WA.

Steve, W3AHL

---In ic7000@..., <jamesbrock@...> wrote :

 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827


Re: [IC-7000] Oscillation

Richard
 

There are people not using linear power supplies???

C. Richard Pumphrey
WN9DDV


On Dec 29, 2015, at 4:46 AM, Howard Jones howardjones155@... [ic7000] <ic7000@...> wrote:

 

Good advice from Don, try an alternative power supply, I have had this experience with switch mode supplies

reghrtads

Howard VK3QA

On Tue, Dec 29, 2015 at 10:47 AM, Don kb5kwv@... [ic7000] <ic7000@...> wrote:
 

You might want to look at your power supply. Especially if it is a switching type.

On 12/28/2015 3:33 PM, James Brock jamesbrock@... [ic7000] wrote:
 
 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827




--
Regards

Howard Jones



Re: Oscillation

Steve W3AHL
 

While it sounds like the spurious signal is originating inside the radio, based upon your description, I would suggest eliminating external sources first, since that is much simpler to do.  

Disconnect all cables that you can from the radio (mic, antenna, tuners, CI-V, external speaker, etc.)  If you can hear the signal in the speaker without the computer connected, disconnect the computer.

If possible, power the radio with a battery.  

Turn off the computer (if possible) and most important -- turn off all network routers and switches in the entire house.  The signal you describe sounds like what I've seen as RFI from LAN cables (especially 100 Mbps).

And finally, turn off power to the entire house.  If the computer must remain on to see the problem, disconnect it from any UPS unit and unplug the UPS.  I notice from Google Earth that there is an overhead power line at the back edge of your property.  Any problems with RFI from that?

If the above doesn't eliminate the birdie, then it probably is indeed inside the radio.  What is the serial # and year purchased (if original owner).  What frequencies have you seen the problem on?

There are several potential grounding issues inside the 7K.  Various changes to grounding springs, PCB artwork, circuit design, etc. have been made over the years, especially in radios made prior to late 2010.

Has the radio ever been returned to an Icom Service Center for repairs?  Did they make any updates while it was there?  There were some ground springs added to the PA board and also to the DDS board and one of the cables from the DDS to the Main board.  In this Group's Files area, look the "7K GROUNDING FINGERS.doc" from by me (s_ahlbom).  That shows what I believe to be the correct configuration.  Remove the covers and verify they are installed and bent up enough to contact the covers.  Also verify the pink pads are installed as shown.  They provide some thermal conductivity, but are also RF absorbers to attenuate noise.

Older radios also tend to have poor grounding from circuit boards to the cast aluminum due to surface oxidation of the aluminum.  This is especially a problem for some grounding springs/clips along the front edge of the Main board to the front of the chassis. The solution is to use 320 grit emery paper to remove the oxide from the aluminum, then scrub in Noalox to prevent it from reforming (as done to aluminum tubing on Yagis or aluminum wiring).

Another problem is with the metal fabric grounding pads used to ground the front of the Main board to the top cover.  Over time, heat causes the black foam inside the metal fabric to deteriorate, resulting in poor contact to the top cover.  If you squeeze the pad, it won't spring back well and black rubber particles will fall out when it is moved.

And finally, the small coax cables connecting the DDS to Main board and the Main board to the PA board can build up a rather hard crust of black tarnish on the silver plating of the connector, that can cause poor RF grounding of the shield.  The problem appears to be inside the outer shield of the connector where it is crimped onto the copper coax braid.  The only reliable fix for this is to replace the cable.  They are only a few dollars from Icom Parts in WA.

Steve, W3AHL

---In ic7000@..., <jamesbrock@...> wrote :

 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827


Re: [IC-7000] Oscillation

Howard Jones
 

Good advice from Don, try an alternative power supply, I have had this experience with switch mode supplies

reghrtads

Howard VK3QA

On Tue, Dec 29, 2015 at 10:47 AM, Don kb5kwv@... [ic7000] <ic7000@...> wrote:
 

You might want to look at your power supply. Especially if it is a switching type.

On 12/28/2015 3:33 PM, James Brock jamesbrock@... [ic7000] wrote:
 
 This is somewhat hard to explain.  But rather frequently now I get an oscillation showing up on my JT65 screen.  You can see it slowly sweep across the screen from right to left.  Strange thing I hold my hand over the case blower it stops and goes the other direction. No doubt somewhat heat related. 

If I have the input on the antenna that has not yet been tuned (remotely) to frequency the oscillation is worse.  Put on the carrier to get the antenna tuner on frequently and the oscillation considerably lower in intensity, sometimes goes off.

When it gets so bad nothing works I recycle it by turning input DC power on and off. 

It is considerably worse when I have the preamplifier off. 

Recapping, to get it to quit or so low I can operate I make sure the antenna is tuned to frequency. I turn on the preamplifier. And when that doesn't work, turn the power switch off and on. 

It has been going like this for several months. I talked to ICOM about it and they said to reset it. That didn't do any good at all.  The tech at ICOM acted as if something like this could not happen.

Anyone out there have a parasitic oscillation running around? 

I am rather inclined to think it is in the RF amplifier stage.

HELP 

W7DAU
James Brock 541-868-5827




--
Regards

Howard Jones


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