Date   

Re: 7000 intermittent?

Dan Fisher AI4GK
 

I'm guessing he's a tube guy. (Fire & glass).


Re: 7000 intermittent?

Van
 

Did you try a different coax jumper to the Dummy load?
73
Van
WD6FGB

--
Sent from Outlook Email App for Android

Tuesday, 01 June 2021, 04:39PM -07:00 from Tom Norris fernblatt@...:

Tubes

On Tue, Jun 1, 2021, 9:40 AM david vanhorn <kc6ete@...> wrote:
"Fire and glass"?



On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io verizon.net@groups.io> wrote:
Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: 7000 intermittent?

Van
 

Did you try a different coax jumper t0 the dummy load ?

--
Sent from Outlook Email App for Android

Tuesday, 01 June 2021, 04:39PM -07:00 from Tom Norris fernblatt@...:

Tubes

On Tue, Jun 1, 2021, 9:40 AM david vanhorn <kc6ete@...> wrote:
"Fire and glass"?



On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io verizon.net@groups.io> wrote:
Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: 7000 intermittent?

david vanhorn
 

Ah.  Ok.   I do some torchwork with glass, and I do pretty fine smd but I don't have any tube gear.


Re: 7000 intermittent?

Tom Norris
 

Tubes


On Tue, Jun 1, 2021, 9:40 AM david vanhorn <kc6ete@...> wrote:
"Fire and glass"?



On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io <wabate=verizon.net@groups.io> wrote:
Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: 7000 intermittent?

david vanhorn
 

Ok.. Intermittent oscillation may explain it all


On Tue, Jun 1, 2021, 5:02 PM Leroy Higgins <leroy.higgins@...> wrote:
Bill, does your radio have a parasitic oscillation on 6M?

Using a 100 MHz oscilloscope, tape the 10:1 probe to your RF output coax and look at the waveform with the transmitter keyed.  Should be a nice clean sine wave of your transmit frequency.  If a parasitic is present the waveform won't be a clean sine wave.   Try this method using your antenna and the dummy load.  

The last time I used this method was on a 2 kW, CW, vacuum tube test transmitter with low RF output power at 15 MHz.   The oscilloscope on the coax method indicated the RF had 60 Hz modulation caused by a power supply filter failure, in the exciter.   When the 60 Hz modulation was eliminated the Bird watt meter read the correct power.

Most coax with stranded wire braid has enough RF leakage to monitor your transmit frequency and modulation.  You can't measure transmit power level accurately, with this method, but you can easily observe modulation and frequencies without an RF power tap, or wiping out your oscilloscope input channel from overvoltage.

Leroy  AD6LH


Re: 7000 intermittent?

Leroy Higgins
 

Bill, does your radio have a parasitic oscillation on 6M?

Using a 100 MHz oscilloscope, tape the 10:1 probe to your RF output coax and look at the waveform with the transmitter keyed.  Should be a nice clean sine wave of your transmit frequency.  If a parasitic is present the waveform won't be a clean sine wave.   Try this method using your antenna and the dummy load.  

The last time I used this method was on a 2 kW, CW, vacuum tube test transmitter with low RF output power at 15 MHz.   The oscilloscope on the coax method indicated the RF had 60 Hz modulation caused by a power supply filter failure, in the exciter.   When the 60 Hz modulation was eliminated the Bird watt meter read the correct power.

Most coax with stranded wire braid has enough RF leakage to monitor your transmit frequency and modulation.  You can't measure transmit power level accurately, with this method, but you can easily observe modulation and frequencies without an RF power tap, or wiping out your oscilloscope input channel from overvoltage.

Leroy  AD6LH


Re: 7000 intermittent?

Ludovic Ludo
 


Good evening,

I would rather think the SWR circuit is correct But then there is an intermittent cut.
Check the transmitter output socket first and solder on the PCB.


Best regards,
Ludovic - F5PBG
http://radioamateur.forumsactifs.com/f36-ic-7000


Le 01/06/2021 à 17:53, wabate via groups.io a écrit :

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Re: 7000 intermittent?

Max
 

I'd be curious as to the fix for this because I have a 7000 with a similar  problem. I never tried mine on 6M, but all the lower bands show a high SWR. But mine doesn't reduce the power out, it runs wide open putting out about 140 watts no matter the power setting is. My SWR meters and my NanoVNA shows my antennas and dummy load to be fine.

Max KG4PID

On Tuesday, June 1, 2021, 10:53:55 AM CDT, wabate via groups.io <wabate@...> wrote:


Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: 7000 intermittent?

david vanhorn
 

" Wow ! Interesting problem, can’t wait to hear the diagnosis."

I agree, this one is going to be interesting since it's misbehaving on the dummy load. 
My first suspect on any older electronics is always the electrolytic caps, but I can't think how that would cause this problem.  Still, if you have to open it up anyway...



On Tue, Jun 1, 2021 at 11:43 AM Kurt Sweeny <damele@...> wrote:

Wow ! Interesting problem, can’t wait to hear the diagnosis.

 

Some thoughts:

  1. The antenna system has the possibility of becoming a  dynamic load (low probability), not so for a dummy load in working order.
  2. Doesn’t 6M share some / a lot of transmission circuitry with HF (same so-239) ?
  3. If the answer to b is yes and 1-30Mhz is OK, could this be a component failure that only occurs above a certain frequency.
  4. The problem is intermittent. What components can fail and briefly recover?

 

Kurt

KD6LZV

 

From: ic7000@groups.io <ic7000@groups.io> On Behalf Of david vanhorn
Sent: Tuesday, June 1, 2021 9:40 AM
To: ic7000@groups.io
Subject: Re: [ic7000] 7000 intermittent?

 

"Fire and glass"?

 

 

 

On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io <wabate=verizon.net@groups.io> wrote:

Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB



--
K1FZY (WA4TPW) SK  9/29/37-4/13/15


Re: 7000 intermittent?

Kurt Sweeny
 

Wow ! Interesting problem, can’t wait to hear the diagnosis.

 

Some thoughts:

  1. The antenna system has the possibility of becoming a  dynamic load (low probability), not so for a dummy load in working order.
  2. Doesn’t 6M share some / a lot of transmission circuitry with HF (same so-239) ?
  3. If the answer to b is yes and 1-30Mhz is OK, could this be a component failure that only occurs above a certain frequency.
  4. The problem is intermittent. What components can fail and briefly recover?

 

Kurt

KD6LZV

 

From: ic7000@groups.io <ic7000@groups.io> On Behalf Of david vanhorn
Sent: Tuesday, June 1, 2021 9:40 AM
To: ic7000@groups.io
Subject: Re: [ic7000] 7000 intermittent?

 

"Fire and glass"?

 

 

 

On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io <wabate=verizon.net@groups.io> wrote:

Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: 7000 intermittent?

Pasquale S
 

Hi Bill

 

SWR sensing circuitry is the same between HF and 50 MHz.

 

Regards

 

Pasquale IW0HEX

 

 

Inviato da Posta per Windows 10

 

Da: wabate via groups.io
Inviato: martedì 1 giugno 2021 17:53
A: ic7000@groups.io
Oggetto: [ic7000] 7000 intermittent?

 

Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB

 


Re: 7000 intermittent?

david vanhorn
 

"Fire and glass"?



On Tue, Jun 1, 2021, 9:53 AM wabate via groups.io <wabate=verizon.net@groups.io> wrote:
Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


7000 intermittent?

wabate
 

Hi All,

After using my 7000  for years Murphy has shown up but in a way that defies my logic.  I typically do not use it on 6M.  I was testing on 6M and i twas receiving well.  Went to transmit (RTTY mode) full carrier but was only getting 20 watts out and the SWR was max.  Checked the antenna with another rig and the antenna was fine.  Put a dummy load on the 700 and got the same low output and high SWR.  Puzzled, I tried another dummy and got the same result.  Power was measured with my Bird meter. 

This is the goofy part.  Went back to the antenna and maybe one out of three key downs the output went to 80 W and a decent SWR,  Could not duplicate that anomaly with the dummy load.  Thought maybe the antenna relay was intermittent so I tried HF and got full output and low SWR into the dummy load.  Did not try UHF. 


My guess is the SWR sensing circuit is faulty.    Is the 6M SWR sensing circuitry different from HF?  I'm a fire and glass guy so limited on what I can do with SMD.


Comment?


73 and TIA,


Bill, K3PGB


Re: cpu logic for 7000

 

How do you know it is the logic board in the 7000? Check the ribbon cables from the panel to the main board before you decide it is bad. As a matter of fact check the signals to the board from the rest of the radio as well.
I doubt that the logic circuit will be easy to find, anyway.
I had problems with these ribbi=on cables before as the want to crack and lose connections.
Also if id is the connections to the board have you tried controlling the radio from a program like Ham Radio Deluxe?
If the radio turns on from the panel then there is some communications between the logic and the cpu in the front panel. 
KE4MD.


Re: cpu logic for 7000

manos balilakis
 

Thank you for your answer i will do that .Regards 73

On Monday, May 10, 2021, 03:07:03 AM GMT+3, Rick Robinson <rickw8zt@...> wrote:


Please make sure your rubber like strip between the display and the board, if it made that way, is carefully cleaned with a dry, lint free cloth and in proper alignment. It is easy to get it off center. I have not gone into my 7K but others radios use this type of contact method. While in there check all ribbon cables to make sure they are fully and squarely seated.  And carefully snug the circuit board mounting screws. Do not mess with the transistor screws. Hope you fix is something as simple as this. I’ve been there with the ribbon cables. One of mine was not in square and after an hour of working fine it became erratic. Doesn’t make sense but straightening it up by reinserting it squarely and checking all the others it has never sense gave me any more trouble. GL...OM





On Sun, May 9, 2021 at 6:18 PM manos balilakis via groups.io <manosbalilakis=yahoo.com@groups.io> wrote:
Hello is any cpu logic for sale ? for 7000 as mine has only lines in the screen and nothing more .The screen panel works perfectly fine tested in other radio .
Thank you regards Manos

--
Rick Genesis 1-29


Re: cpu logic for 7000

Rick Robinson
 

Please make sure your rubber like strip between the display and the board, if it made that way, is carefully cleaned with a dry, lint free cloth and in proper alignment. It is easy to get it off center. I have not gone into my 7K but others radios use this type of contact method. While in there check all ribbon cables to make sure they are fully and squarely seated.  And carefully snug the circuit board mounting screws. Do not mess with the transistor screws. Hope you fix is something as simple as this. I’ve been there with the ribbon cables. One of mine was not in square and after an hour of working fine it became erratic. Doesn’t make sense but straightening it up by reinserting it squarely and checking all the others it has never sense gave me any more trouble. GL...OM





On Sun, May 9, 2021 at 6:18 PM manos balilakis via groups.io <manosbalilakis=yahoo.com@groups.io> wrote:
Hello is any cpu logic for sale ? for 7000 as mine has only lines in the screen and nothing more .The screen panel works perfectly fine tested in other radio .
Thank you regards Manos

--
Rick Genesis 1-29


cpu logic for 7000

manos balilakis
 

Hello is any cpu logic for sale ? for 7000 as mine has only lines in the screen and nothing more .The screen panel works perfectly fine tested in other radio .
Thank you regards Manos


Re: Memory layout for IC-7000

Bob Hoffmann, K4CQO
 

This is what I do with my 7000:

  • For the 6 settings that are individual, I use them for the repeaters near me
  • For each band that I use – 14 MHz, 18 MHz & 29 MHz, 7 MHz, 3 MHz I take the 99 entries and divide the band width into 99 parts, and set each one to the steps.
  • When I go to that band, I just “tune” by turning the know and it goes up and down the band by the steps that were set – 18 MHz can go by 100 Khz, and still have room for the 29 MHz band – I can do a band sweep and thin it is easy to go up and down using the step knob. The steps are usually close enough to hear anybody close to the step to tune in with the tuning knob.

It takes some work to put in all of the steps, but when done, it is an easy way to get around with the bands.

 

 

73 – K4CQO

Bob Hoffmann

 

 

From: ic7000@groups.io <ic7000@groups.io> On Behalf Of Glenn Jensen
Sent: Sunday, May 9, 2021 10:57 AM
To: ic7000@groups.io
Subject: Re: [ic7000] Memory layout for IC-7000

 

Steve,

Mine is set much like yours, with all of my local repeaters for 2M / 440 in Group A.  6M repeater go in a different group (didn’t want to hear the relay clicks).

Next, you may wish to have Aircraft, NOAA, Shortwave, commercial broadcast, etc.

The RT Software makes this very easy (cut and paste across the memories – you can even have dupes in memory groupings).  You can also use Chirp if you like.

 

Personal preferences – Best 73’s Glenn

 

From: ic7000@groups.io <ic7000@groups.io> On Behalf Of Stephen Dubin via groups.io
Sent: Saturday, May 8, 2021 2:58 PM
To: ic7000@groups.io
Subject: [ic7000] Memory layout for IC-7000

 

I have been trying to set up the memory storage layout on my IC7000 for use in base shack. So far I have picked Bank A for my favorite repeaters and, in Bank B I have put in FT8, PSK31 and SKCC frequencies.  

 

I wonder whether there is a more logical and efficient way to set up the memory layout. Perhaps others might  share how they do this and also any links to this  process.

 

VY TNX es  73 de W3UEC

Steve Dubin

A clear conscience is usually the result of a weak memory. 


Re: Technician for ALS-500M Repair

Glenn Jensen
 

Scott also repaired / aligned my IC-7000 - outstanding work, good communications, completely fair pricing.

Best 73's - Glenn

-----Original Message-----
From: ic7000@groups.io <ic7000@groups.io> On Behalf Of Mister Mike
Sent: Saturday, May 8, 2021 2:52 PM
To: ic7000@groups.io
Subject: Re: [ic7000] Technician for ALS-500M Repair

Scott repaired an IC-7000 for me. It took a lot less time and cost a lot less than sending it to ICOM. Tell him W1RC sent ya.

Scott is in WA State so shipping back and forth won’t cost you too much. Best is to email him first.

On May 8, 2021, at 5:48 PM, Kurt Sweeny <damele@sbcglobal.net> wrote:


Yes, West Coast works.
' Will report back to group on final diagnosis and repair.
Thanks Mike !

-----Original Message-----
From: ic7000@groups.io <ic7000@groups.io> On Behalf Of Mister Mike
Sent: Saturday, May 8, 2021 2:42 PM
To: ic7000@groups.io
Subject: Re: [ic7000] Technician for ALS-500M Repair

West Coast?

Malcom Technical Support (MTS)
Scott Malcom
5130 Jackson Hwy
Toledo, WA 98591-8680
Email is mts@toledotel.com

Fast turnaround, reasonable rates, great technician.

Good luck,

Michael, W1RC

On May 8, 2021, at 5:27 PM, Kurt Sweeny <damele@sbcglobal.net> wrote:

Does anyone have a recommendation for a service technician (stateside) to repair the 500M. I am pretty sure that the four Toshiba power transistors have gone to their reward, owing to the operator using the fault detection as an idiot proof device as opposed to a safeguard. The job would include checking the load fault circuitry.

Kurt
KD6LZV















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