Andrew
I am retired but sometimes household task take priority. I can discuss
radio things most afternoons.

I did measure the transformer output in CW mode at 28 MHz and saw 6+
watts
and 20amps.

I have found that my oscilloscope is old and not accurate, but is good
for
a relative measurement that shows the L305 input voltage is higher than
the
output. I also verified this with a VTVM.
I can’t argue that the L305 maybe bad, but is of robust construction
with
the secondary windings shielded coax. I did check continuity of the
primary to the secondary. Which shows a good open circuit.

I can’t explain why the 6 watts does not pass through the rx/tx relay
and
the HPFs.

Tommy

On Tue, Jan 28, 2025 at 3:48?AM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Oh !!!

Well done how much current was it drawing when you were measuring 6

Watts,

now you can put a watt meter try FM or CW see if you get 100 Watts.

If the rig draws 20 Amp and you are only getting a few Watts, then

the

transformer is faulty in some way.

Order a new transformer any way, then you can move with fault

finding.

If you saw 6 Watts at the output of the transformer, then why was it

not

at the aerial socket?

73

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 23:27, at 23:27, "Tommy Wooten via groups.io"

<kf4rwg=

[email protected]> wrote:

Andrew
I removed the PA board, separated the transformer and reinstalled

the

board
so I could access the transformer output on the top side. See photo
attached.

Tommy

On Mon, Jan 27, 2025 at 5:42?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Yes indeed,

CW or AM would be my preferred option, also you need a PEP Watt

meter.

KR

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 22:35, at 22:35, "James Tiberius via groups.io"
<nono2212000@...> wrote:

In SSB mode current draw should be low until audio is being

modulated.

I would expect high current draw when using carrier modes

Tommy, Pay careful attention to what I am saying here.
If you key the radio RTTY, AM, FM, CW and you are drawing 20 amps AND
if you key the mike on SSB and you draw just a couple of amps you are
producing RF power.
Your radio is drawing power trying to get the feed back from the
forward power measurement circuit to satisfy the CPU power demand
signal and increasing the drive to the point where the IC current limit
is limiting the drive to limit the current draw to 20 amps.
If the radio in SSB is just drawing a few amps in SSB with no audio
input the current limit is not reached because the PA is just sitting
there at idle current.
You do have something keeping the RF power from getting as far as the
forward power sensing circuit and out of the antenna jack, perhaps a
broken trace, bad relay or a band pass filter out of kilter.
While I think that the transformer could be bad, I suspect that it is
not as they are pretty rugged.
It has been a while since I have had an IC-7000 on my bench, but I have
seen this kind of action from a number of radios and often it has been
in the transmitter bandpass filters and either relay drivers or PIN
diodes defective.
I will take time to revisit the prints for the IC-7000 and see if I?
can offer some suggestions, but if I were you I think that I would
start checking the direct pathways through the circuits after the PA
amplifiers. The output transformer is at least carrying current to the
PA from the 13.8 volts and probably the secondary is doing it's job as
well. There could be some shorted caps (or open for that matter) that
are an issue or perhaps one of the TR relays etc.
Just my opinion, but I have managed to be wrong before and I reserve
that option as well.

JD
KE4MD

Andrew,
I am in Tallahassee FL. Eastern time zone.
Tomorrow would be better for me. What is a good time for you?
Tommy

On Mon, Jan 27, 2025 at 6:16?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

How much current?

It might be better to set up a teams meeting, how far behind are you

in

time, I am GMT

KR

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 22:42, at 22:42, "Tommy Wooten via groups.io"

<kf4rwg=

[email protected]> wrote:

Andrew
Yes the power supply amps does peak with the modulation.
I do have a generator. I have used it when setting tx gain and

output

power for vhf/uhf.

Tommy


On Mon, Jan 27, 2025 at 5:31?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Hi Tommy,

Is it still drawing 20 amp from the power supply?

When you are speak into the mic, do you have an audio dig

generator?

KR

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 22:09, at 22:09, "Tommy Wooten via groups.io"

<kf4rwg=

[email protected]> wrote:

Andrew,
I have done some more measurements as you recommended. I removed

the

PA
board and attached a connector to the output of L305 separated

from

the

rx/tx relay and HPF. I have attached photos of the input and

output

voltages set at 10M USB with voice into the microphone. These

voltages

are
much less than what you said they should be. The problem must be

up

stream
from the PA FETs.
The oscilloscope was set at 50 millivolt per div in both photos.

The

voltage was lower at the output of L305.!? But measured about 6

watts

on
the external power meter into a dummy load.

The vhf/uhf works well so the driver is working.

Thanks for your help.
Tommy



On Sun, Jan 26, 2025 at 10:55?AM Andrew Lenton via groups.io <a=
[email protected]> wrote:

This is a very hard radio to work on, as you cannot easily get

to

the

PA

board the way it is mounted and soldered into the pa driver

board

I would remove the PA board, replace L305, for starters while

it

is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all

you

can do

is prod the rear.



All 12V HF PA stages have an impedance in the milli Ohms 0.4 to

0.6

ohms,

as it draws 20A, or so, the output transformer has to match 0.6

Ohms

to a

50 Ohm, so it needs to step up the voltage.



The problem is it would be nice to lift L306 and put your Watt

meter

in

there, but you have to rip the PA board out then put it back

together

to

make the measurement, so impractical



To protect the PA the is a coupler to control power and to

protect

the PA

against hi SWR, however, if no power is getting past the

coupler

you

will

have full power 24/7



There could be a fault here:





But only you can trace, so measure i/p to L305, you will get a

voltage,

the out put will be higher at 100 Watts 50 Ohm the voltage will

be

70.7V

RMS, so PTP on a scope 200V if you are not getting this on the

O/P

then

move back to the I/P you should get 13.8 V to 40V PTP. I have

one

of

these

in bits working before I box it back together I will make some

measurements

and send back to you. as the PA in not loaded with 50 OHM, the

voltage can

rise too high

You need to set a voltage on Ref or FOR to knock the power back

to

a

few

Watts then you can uses CW and safely trace you signal.





KR



Andrew G8UUG







-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew

Lenton

Sent: 26 January 2025 10:00
To: [email protected]
Subject: Re: [ic7000] IC7000 no HF Transmit



This is a very hard radio to work on, as you can not easily get

to

the PA

board the way it is soldered into the pa driver.



I would remove the PA board, replace L305, for starters while

it

is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all

you

can do

is prod the rear.



All HF PA stages have an impedance in the mOhms .1 .2 ohms as

thet6drsw

20A, the out put transformer has to match .1 of an ohm to 50,

so

it

needs

to step up the voltage.



KR



Andrew



I have a wiring unit, I can make some measurements for you



?Get BlueMail for Android ?



On 26 Jan 2025, 01:32, at 01:32, "Tommy Wooten via groups.io" <
kf4rwg@...> wrote:

Bob, Thanks for the encouragement

I have considered all of the suggestions for troubleshooting

the

problem I have with the IC7000. I have tried to trace the HF

RF

path

with an oscilloscope from where the signal comes through the

cable

from

the main board to the PA board. I have traced the signal and

inspect

all components through to the output at ant1. The signal

seems

to

loose its punch where the PA FETs combine into the L305

transformer.

The bias setting of the PA FETs seem to be correct. After the

signal

reaches the rx/rx relay it passes through the selected HPF

where

it

reaches ant1. The resulting signal is only a few milliwatts.

I

have

tried to keep the setting in SSB and I see modulation when

speaking

into the microphone.

I know it is difficult to troubleshoot the issue remotely but

I

appreciate any and all ideas.

Thanks

Tommy. KF4RWG

On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=

[email protected]> wrote:

Well this is #30 then. That's OK because when the rest of us

have

this

problem we'll appreciate every one of these replies.

Keep on writin' you guys.

Bob W4JFA

On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=

[email protected]> wrote:

Forgive me if this has been mentioned before but as this is

the

29th

reply I haven't gone back and read everything.

I always go first to where the effect of a fault is obvious

without

any

ambiguity, in this case the rf output ie Ant 1 connector,

working

back to

eliminate ALL the stages involved, including in this case

the

SO32

jack.

Good luck.

Geoff

VK3ZGW

Andrew
I removed the PA board, separated the transformer and reinstalled the
board
so I could access the transformer output on the top side. See photo
attached.

Tommy

On Mon, Jan 27, 2025 at 5:42?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Yes indeed,

CW or AM would be my preferred option, also you need a PEP Watt

meter.

KR

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 22:35, at 22:35, "James Tiberius via groups.io"
<nono2212000@...> wrote:

In SSB mode current draw should be low until audio is being

modulated.

I would expect high current draw when using carrier modes

Andrew
Yes the power supply amps does peak with the modulation.
I do have a generator. I have used it when setting tx gain and output
power for vhf/uhf.

Tommy


On Mon, Jan 27, 2025 at 5:31?PM Andrew Lenton via groups.io <a=
[email protected]> wrote:

Hi Tommy,

Is it still drawing 20 amp from the power supply?

When you are speak into the mic, do you have an audio dig generator?

KR

Andrew

?Get BlueMail for Android ?

On 27 Jan 2025, 22:09, at 22:09, "Tommy Wooten via groups.io"

<kf4rwg=

[email protected]> wrote:

Andrew,
I have done some more measurements as you recommended. I removed

the

PA
board and attached a connector to the output of L305 separated from

the

rx/tx relay and HPF. I have attached photos of the input and output
voltages set at 10M USB with voice into the microphone. These

voltages

are
much less than what you said they should be. The problem must be up
stream
from the PA FETs.
The oscilloscope was set at 50 millivolt per div in both photos.

The

voltage was lower at the output of L305.!? But measured about 6

watts

on
the external power meter into a dummy load.

The vhf/uhf works well so the driver is working.

Thanks for your help.
Tommy



On Sun, Jan 26, 2025 at 10:55?AM Andrew Lenton via groups.io <a=
[email protected]> wrote:

This is a very hard radio to work on, as you cannot easily get to

the

PA

board the way it is mounted and soldered into the pa driver board



I would remove the PA board, replace L305, for starters while it

is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all

you

can do

is prod the rear.



All 12V HF PA stages have an impedance in the milli Ohms 0.4 to

0.6

ohms,

as it draws 20A, or so, the output transformer has to match 0.6

Ohms

to a

50 Ohm, so it needs to step up the voltage.



The problem is it would be nice to lift L306 and put your Watt

meter

in

there, but you have to rip the PA board out then put it back

together

to

make the measurement, so impractical



To protect the PA the is a coupler to control power and to protect

the PA

against hi SWR, however, if no power is getting past the coupler

you

will

have full power 24/7



There could be a fault here:





But only you can trace, so measure i/p to L305, you will get a

voltage,

the out put will be higher at 100 Watts 50 Ohm the voltage will be

70.7V

RMS, so PTP on a scope 200V if you are not getting this on the O/P

then

move back to the I/P you should get 13.8 V to 40V PTP. I have one

of

these

in bits working before I box it back together I will make some

measurements

and send back to you. as the PA in not loaded with 50 OHM, the

voltage can

rise too high

You need to set a voltage on Ref or FOR to knock the power back to

a

few

Watts then you can uses CW and safely trace you signal.





KR



Andrew G8UUG







-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew

Lenton

Sent: 26 January 2025 10:00
To: [email protected]
Subject: Re: [ic7000] IC7000 no HF Transmit



This is a very hard radio to work on, as you can not easily get to

the PA

board the way it is soldered into the pa driver.



I would remove the PA board, replace L305, for starters while it

is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all

you

can do

is prod the rear.



All HF PA stages have an impedance in the mOhms .1 .2 ohms as

thet6drsw

20A, the out put transformer has to match .1 of an ohm to 50, so

it

needs

to step up the voltage.



KR



Andrew



I have a wiring unit, I can make some measurements for you



?Get BlueMail for Android ?



On 26 Jan 2025, 01:32, at 01:32, "Tommy Wooten via groups.io" <
kf4rwg@...> wrote:

Bob, Thanks for the encouragement

I have considered all of the suggestions for troubleshooting the

problem I have with the IC7000. I have tried to trace the HF RF

path

with an oscilloscope from where the signal comes through the

cable

from

the main board to the PA board. I have traced the signal and

inspect

all components through to the output at ant1. The signal seems

to

loose its punch where the PA FETs combine into the L305

transformer.

The bias setting of the PA FETs seem to be correct. After the

signal

reaches the rx/rx relay it passes through the selected HPF where

it

reaches ant1. The resulting signal is only a few milliwatts. I

have

tried to keep the setting in SSB and I see modulation when

speaking

into the microphone.

I know it is difficult to troubleshoot the issue remotely but I

appreciate any and all ideas.

Thanks

Tommy. KF4RWG

On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=

[email protected]> wrote:

Well this is #30 then. That's OK because when the rest of us

have

this

problem we'll appreciate every one of these replies.

Keep on writin' you guys.

Bob W4JFA

On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=

[email protected]> wrote:

Forgive me if this has been mentioned before but as this is

the

29th

reply I haven't gone back and read everything.

I always go first to where the effect of a fault is obvious

without

any

ambiguity, in this case the rf output ie Ant 1 connector,

working

back to

eliminate ALL the stages involved, including in this case the

SO32

jack.

Good luck.

Geoff

VK3ZGW

In SSB mode current draw should be low until audio is being modulated.
I would expect high current draw when using carrier modes

Andrew,
I have done some more measurements as you recommended. I removed the
PA
board and attached a connector to the output of L305 separated from the
rx/tx relay and HPF. I have attached photos of the input and output
voltages set at 10M USB with voice into the microphone. These voltages
are
much less than what you said they should be. The problem must be up
stream
from the PA FETs.
The oscilloscope was set at 50 millivolt per div in both photos. The
voltage was lower at the output of L305.!? But measured about 6 watts
on
the external power meter into a dummy load.

The vhf/uhf works well so the driver is working.

Thanks for your help.
Tommy



On Sun, Jan 26, 2025 at 10:55?AM Andrew Lenton via groups.io <a=
[email protected]> wrote:

This is a very hard radio to work on, as you cannot easily get to the

PA

board the way it is mounted and soldered into the pa driver board



I would remove the PA board, replace L305, for starters while it is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all you

can do

is prod the rear.



All 12V HF PA stages have an impedance in the milli Ohms 0.4 to 0.6

ohms,

as it draws 20A, or so, the output transformer has to match 0.6 Ohms

to a

50 Ohm, so it needs to step up the voltage.



The problem is it would be nice to lift L306 and put your Watt meter

in

there, but you have to rip the PA board out then put it back together

to

make the measurement, so impractical



To protect the PA the is a coupler to control power and to protect

the PA

against hi SWR, however, if no power is getting past the coupler you

will

have full power 24/7



There could be a fault here:





But only you can trace, so measure i/p to L305, you will get a

voltage,

the out put will be higher at 100 Watts 50 Ohm the voltage will be

70.7V

RMS, so PTP on a scope 200V if you are not getting this on the O/P

then

move back to the I/P you should get 13.8 V to 40V PTP. I have one of

these

in bits working before I box it back together I will make some

measurements

and send back to you. as the PA in not loaded with 50 OHM, the

voltage can

rise too high

You need to set a voltage on Ref or FOR to knock the power back to a

few

Watts then you can uses CW and safely trace you signal.





KR



Andrew G8UUG







-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew Lenton
Sent: 26 January 2025 10:00
To: [email protected]
Subject: Re: [ic7000] IC7000 no HF Transmit



This is a very hard radio to work on, as you can not easily get to

the PA

board the way it is soldered into the pa driver.



I would remove the PA board, replace L305, for starters while it is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all you

can do

is prod the rear.



All HF PA stages have an impedance in the mOhms .1 .2 ohms as

thet6drsw

20A, the out put transformer has to match .1 of an ohm to 50, so it

needs

to step up the voltage.



KR



Andrew



I have a wiring unit, I can make some measurements for you



?Get BlueMail for Android ?



On 26 Jan 2025, 01:32, at 01:32, "Tommy Wooten via groups.io" <
kf4rwg@...> wrote:

Bob, Thanks for the encouragement

I have considered all of the suggestions for troubleshooting the

problem I have with the IC7000. I have tried to trace the HF RF

path

with an oscilloscope from where the signal comes through the cable

from

the main board to the PA board. I have traced the signal and

inspect

all components through to the output at ant1. The signal seems to

loose its punch where the PA FETs combine into the L305 transformer.

The bias setting of the PA FETs seem to be correct. After the

signal

reaches the rx/rx relay it passes through the selected HPF where it

reaches ant1. The resulting signal is only a few milliwatts. I

have

tried to keep the setting in SSB and I see modulation when speaking

into the microphone.

I know it is difficult to troubleshoot the issue remotely but I

appreciate any and all ideas.

Thanks

Tommy. KF4RWG

On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=

[email protected]> wrote:

Well this is #30 then. That's OK because when the rest of us have

this

problem we'll appreciate every one of these replies.

Keep on writin' you guys.

Bob W4JFA

On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=

[email protected]> wrote:

Forgive me if this has been mentioned before but as this is the

29th

reply I haven't gone back and read everything.

I always go first to where the effect of a fault is obvious

without

any

ambiguity, in this case the rf output ie Ant 1 connector, working

back to

eliminate ALL the stages involved, including in this case the

SO32

jack.

Good luck.

Geoff

VK3ZGW

Andrew,
I have done some more measurements as you recommended. I removed the
PA
board and attached a connector to the output of L305 separated from the
rx/tx relay and HPF. I have attached photos of the input and output
voltages set at 10M USB with voice into the microphone. These voltages
are
much less than what you said they should be. The problem must be up
stream
from the PA FETs.
The oscilloscope was set at 50 millivolt per div in both photos. The
voltage was lower at the output of L305.!? But measured about 6 watts
on
the external power meter into a dummy load.

The vhf/uhf works well so the driver is working.

Thanks for your help.
Tommy



On Sun, Jan 26, 2025 at 10:55?AM Andrew Lenton via groups.io <a=
[email protected]> wrote:

This is a very hard radio to work on, as you cannot easily get to the

PA

board the way it is mounted and soldered into the pa driver board



I would remove the PA board, replace L305, for starters while it is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all you

can do

is prod the rear.



All 12V HF PA stages have an impedance in the milli Ohms 0.4 to 0.6

ohms,

as it draws 20A, or so, the output transformer has to match 0.6 Ohms

to a

50 Ohm, so it needs to step up the voltage.



The problem is it would be nice to lift L306 and put your Watt meter

in

there, but you have to rip the PA board out then put it back together

to

make the measurement, so impractical



To protect the PA the is a coupler to control power and to protect

the PA

against hi SWR, however, if no power is getting past the coupler you

will

have full power 24/7



There could be a fault here:





But only you can trace, so measure i/p to L305, you will get a

voltage,

the out put will be higher at 100 Watts 50 Ohm the voltage will be

70.7V

RMS, so PTP on a scope 200V if you are not getting this on the O/P

then

move back to the I/P you should get 13.8 V to 40V PTP. I have one of

these

in bits working before I box it back together I will make some

measurements

and send back to you. as the PA in not loaded with 50 OHM, the

voltage can

rise too high

You need to set a voltage on Ref or FOR to knock the power back to a

few

Watts then you can uses CW and safely trace you signal.





KR



Andrew G8UUG







-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew Lenton
Sent: 26 January 2025 10:00
To: [email protected]
Subject: Re: [ic7000] IC7000 no HF Transmit



This is a very hard radio to work on, as you can not easily get to

the PA

board the way it is soldered into the pa driver.



I would remove the PA board, replace L305, for starters while it is

out

you can inspect the components one by one.



This unit does not lend itself to test and measurements, as all you

can do

is prod the rear.



All HF PA stages have an impedance in the mOhms .1 .2 ohms as

thet6drsw

20A, the out put transformer has to match .1 of an ohm to 50, so it

needs

to step up the voltage.



KR



Andrew



I have a wiring unit, I can make some measurements for you



?Get BlueMail for Android ?



On 26 Jan 2025, 01:32, at 01:32, "Tommy Wooten via groups.io" <
kf4rwg@...> wrote:

Bob, Thanks for the encouragement

I have considered all of the suggestions for troubleshooting the

problem I have with the IC7000. I have tried to trace the HF RF

path

with an oscilloscope from where the signal comes through the cable

from

the main board to the PA board. I have traced the signal and

inspect

all components through to the output at ant1. The signal seems to

loose its punch where the PA FETs combine into the L305 transformer.

The bias setting of the PA FETs seem to be correct. After the

signal

reaches the rx/rx relay it passes through the selected HPF where it

reaches ant1. The resulting signal is only a few milliwatts. I

have

tried to keep the setting in SSB and I see modulation when speaking

into the microphone.

I know it is difficult to troubleshoot the issue remotely but I

appreciate any and all ideas.

Thanks

Tommy. KF4RWG

On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=

[email protected]> wrote:

Well this is #30 then. That's OK because when the rest of us have

this

problem we'll appreciate every one of these replies.

Keep on writin' you guys.

Bob W4JFA

On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=

[email protected]> wrote:

Forgive me if this has been mentioned before but as this is the

29th

reply I haven't gone back and read everything.

I always go first to where the effect of a fault is obvious

without

any

ambiguity, in this case the rf output ie Ant 1 connector, working

back to

eliminate ALL the stages involved, including in this case the

SO32

jack.

Good luck.

Geoff

VK3ZGW

-----Original Message-----
From: [email protected] <[email protected]> On Behalf Of Andrew Lenton
Sent: 26 January 2025 10:00
To: [email protected]
Subject: Re: [ic7000] IC7000 no HF Transmit

?

This is a very hard radio to work on, as you can not easily get to the PA board the way it is soldered into the pa driver.

?

I would remove the PA board, replace L305, for starters while it is out you can inspect the components one by one.

?

This unit does not lend itself to test and measurements, as all you can do is prod the rear.

?

All HF PA stages have an impedance in the mOhms .1 .2 ohms as thet6drsw 20A, the out put transformer has to match .1 of an ohm to 50, so it needs to step up the voltage.

?

KR

?

Andrew

?

I have a wiring unit, I can make some measurements for you

?

?Get BlueMail for Android ?

?

On 26 Jan 2025, 01:32, at 01:32, "Tommy Wooten via groups.io" <kf4rwg@...> wrote:

>Bob, Thanks for the encouragement

>?

>I have considered all of the suggestions for troubleshooting the

>problem I have with the IC7000.? I have tried to trace the HF RF path

>with an oscilloscope from where the signal comes through the cable from

>the main board to the PA board.? I have traced the signal and inspect

>all components through to the output at ant1.? The signal seems to

>loose its punch where the PA FETs combine into the L305 transformer.?

>The bias setting of the PA FETs seem to be correct.? After the signal

>reaches the rx/rx relay it passes through the selected HPF where it

>reaches ant1.? The resulting signal is only a few milliwatts.? I have

>tried to keep the setting in SSB and I see modulation when speaking

>into the microphone.

>I know it is difficult to troubleshoot the issue remotely but I

>appreciate any and all ideas.

>Thanks

>Tommy. KF4RWG

>?

>?

>?

>On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=

>[email protected]> wrote:

>?

>> Well this is #30 then. That's OK because when the rest of us have

>this

>> problem we'll appreciate every one of these replies.

>> Keep on writin' you guys.

>> Bob W4JFA

>>?

>> On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=

>> [email protected]> wrote:

>>?

>>> Forgive me if this has been mentioned before but as this is the 29th

>>> reply I haven't gone back and read everything.

>>>?

>>> I always go first to where the effect of a fault is obvious without

>any

>>> ambiguity, in this case the rf output ie Ant 1 connector, working

>back to

>>> eliminate ALL the stages involved, including in this case the SO32

>jack.

>>>?

>>> Good luck.

>>>?

>>> Geoff

>>> VK3ZGW

>>>?

>>>?

>>?

>>?

>?

>?

>?

?

?

?

?

Bob, Thanks for the encouragement

I have considered all of the suggestions for troubleshooting the
problem I
have with the IC7000. I have tried to trace the HF RF path with an
oscilloscope from where the signal comes through the cable from the
main
board to the PA board. I have traced the signal and inspect all
components
through to the output at ant1. The signal seems to loose its punch
where
the PA FETs combine into the L305 transformer. The bias setting of the
PA
FETs seem to be correct. After the signal reaches the rx/rx relay it
passes through the selected HPF where it reaches ant1. The resulting
signal is only a few milliwatts. I have tried to keep the setting in
SSB
and I see modulation when speaking into the microphone.
I know it is difficult to troubleshoot the issue remotely but I
appreciate
any and all ideas.
Thanks
Tommy. KF4RWG



On Sat, Jan 25, 2025 at 6:31?PM Bob via groups.io <W4JFABob=
[email protected]> wrote:

Well this is #30 then. That's OK because when the rest of us have

this

problem we'll appreciate every one of these replies.
Keep on writin' you guys.
Bob W4JFA

On Thu, Jan 23, 2025 at 4:40?PM Geoff via groups.io <vk3zgw=
[email protected]> wrote:

Forgive me if this has been mentioned before but as this is the 29th
reply I haven't gone back and read everything.

I always go first to where the effect of a fault is obvious without

any

ambiguity, in this case the rf output ie Ant 1 connector, working

back to

eliminate ALL the stages involved, including in this case the SO32

jack.

Good luck.

Geoff
VK3ZGW