Date   

Re: Repair KI03B on K3S (GOOD NEWS)

Eric Swartz - WA6HHQ, Elecraft
 

Hi Everett,

I apologize for the delay on this. This was -way- too long.

Due to COVID restrictions most of our sales and customer support teams are working from home, along with our engineers. This has caused occasional mis-communications between the outside and inside groups, along with some unavoidable delays.  I stepped in personally to help expedite things today on your problem. 

Fortunately the PCB preheating rework station for the particular leadless package type used on the USB IC finally arrived. This is a big help for changing these parts. (Using hot air rework tools without preheating the area under this type of IC package, which has all of its contacts on the bottom plus a central heat-sinking pad, usually results in damage to the board and other components.)

We're working hard to speed up response times and get repairs out more quickly. 

73, 
Eric    WA6HHQ
elecraft.com


Re: K3 Locked Up - MCU LD

Keith_WE6R
 

Hi Jim;
Confirming, your computer "device manager" changes to show the comm port when you plug the USB end into the computer? (takes maybe 10 seconds).
And you set the K3 Utility to that comm #?
Directly to the K3, no P3 or any other equipment inline?
Will the computer talk to the P3 with the P3 utility?
Send me an email direct with the whole story, I have too many things going on. 
Next would be pull the KIO3 digital board and check the little black cube chokes, they should be about 4 ohms (they can get popped open).
Keith WE6R Elecraft Tech keith at elecraft.com  


Re: Shipping a KPA500 to factory.

Bill Mader
 

Welcome to the real world Gerard.  I worked in U.S. Air Force communications maintenance for 26 years.  For the last six.  I met with a product improvement group twice each year.  There is no perfect product, especially electronic.  If our gear were recalled and re-designed on any/every failure, almost none of us could afford them.  Warranty costs to manufacturers are built into the sales price.  Your suggestion would put amateur radio products out of reach!

One thing we did with Air Force equipment was called configuration management.  We knew which versions of each product had which changes.  If significant, we modified previous versions and knew which serial numbers were modified.  I would like to see a watered down version for Elecraft products by serial number so I could ask if S/N 1234 had version 3 changes installed.  I would pay the small increase in prices for that.

My Elecraft gear (I have a lot of it!) has been very reliable, but not perfect.  I have also run it hard.

73, Bill, K8TE


Repair KI03B on K3S (GOOD NEWS)

Everett N4CY
 

Elecrart had just put in some new equipment to repair boards and are sending me a repaired replacement board set, which is great news.


Two months ago I sent the KIO3B board from my K3S to Elecraft to have it repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I finally sent Elecraft an email asking what the status was of the board. Finally they replied to my email and said that they would have to replace the board, but they have no boards and would have to order them. So I sent another email asking when they would be getting the boards. So yesterday Evening I received an email and was told that I needed to put my name on their list for boards.

So after yesterday’s email I took a look at the schematic for the KIO3B board and there is a integrated device on the USB input “TUSB2036” which is a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently Elecraft do not repair boards and just replace them. My thinking is if they are not able to get replacement boards then why don’t they repair them?

I have asked them to return the board, as I plan on trying to replacing the TUSB2036 myself. I have a hot air rework station and will try to replace the device and hope it works-out? At this point I am so discussed with Elecraft that I am thinking about canceling the K4 that I have on order and buying something else.

Everett N4CY


Re: Shipping a KPA500 to factory.

Ken K6MR
 

Yes, improvements are a normal part of new product introduction.  My only complaint, at least with the KPA1500, is the lack of information about all of the changes.  That and a lack of a schematic.  I have been sent some modifications, but the techs have insisted that some mods are “factory only”  Why?  This is not cutting edge rocket science after all. 

 

Some of us are quite capable of fixing/modifying these things, so it is totally unnecessary to go through the expense of shipping it back to the mother ship.  I used to repair $250,000 HP equipment, I think I can handle these.  And units like mine (#76) are way out of warranty.  So damage is on my dime anyway.

 

Ken K6MR

 

From: Rick NK7I
Sent: Friday, November 20, 2020 12:43
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

 

Because improvements occurred, normal to any new product.

Rick NK7I

 

On 11/20/2020 8:44 AM, Gerard wrote:

Why are repairs required?  This is expensive equipment.  Bad design should be covered by recall and re-engineering. 

 

On Fri 20 Nov 2020, 17:31 Rick NK7I, <Rick.NK7I@...> wrote:

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I

 

On 11/20/2020 8:00 AM, Jim N7US wrote:

I believe the maximum insurance available from a UPS store is $1500, and they determine the insurance pricing.  Consequently, I ship high value items only from a UPS facility (or FedEx).  FedEx Office is part of FedEx, I believe, so shipping from one of them is the same as from a FedEx facility.

 

73,  Jim N7US

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Mark Morin via groups.io
Sent: Friday, November 20, 2020 09:13
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

 

On Wed, Oct 7, 2020 at 05:33 PM, Richard Williams wrote:

I agree; for a high value item that is heavy, I use the UPS store or FedEx.  I think when you use one of these, any damage claims are honored.

I wouldn't bet on that in the case of UPS store. My experience with them was that the UPS Store would not honour the guarantee because they blamed UPS, and UPS would not honour it because they blamed the USP Store. I said it didn't matter which was responsible, but to them it did matter because, as I learned,  UPS Stores are just independent franchisees (small local businesses) and are not bound to honour UPS warrantees. I tried everything but I was out of luck. So I'll  NEVER AGAIN use UPS. 

Mark VA2MM

 


Re: Shipping a KPA500 to factory.

Rick NK7I
 

Because improvements occurred, normal to any new product.

Rick NK7I


On 11/20/2020 8:44 AM, Gerard wrote:
Why are repairs required?  This is expensive equipment.  Bad design should be covered by recall and re-engineering. 

On Fri 20 Nov 2020, 17:31 Rick NK7I, <Rick.NK7I@...> wrote:

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I


On 11/20/2020 8:00 AM, Jim N7US wrote:

I believe the maximum insurance available from a UPS store is $1500, and they determine the insurance pricing.  Consequently, I ship high value items only from a UPS facility (or FedEx).  FedEx Office is part of FedEx, I believe, so shipping from one of them is the same as from a FedEx facility.

 

73,  Jim N7US

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Mark Morin via groups.io
Sent: Friday, November 20, 2020 09:13
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

 

On Wed, Oct 7, 2020 at 05:33 PM, Richard Williams wrote:

I agree; for a high value item that is heavy, I use the UPS store or FedEx.  I think when you use one of these, any damage claims are honored.

I wouldn't bet on that in the case of UPS store. My experience with them was that the UPS Store would not honour the guarantee because they blamed UPS, and UPS would not honour it because they blamed the USP Store. I said it didn't matter which was responsible, but to them it did matter because, as I learned,  UPS Stores are just independent franchisees (small local businesses) and are not bound to honour UPS warrantees. I tried everything but I was out of luck. So I'll  NEVER AGAIN use UPS. 

Mark VA2MM


Re: [Elecraft-K4] Repair KI03B on K3S

Joe Subich, W4TV
 

On 2020-11-20 12:28 PM, David G3YYD via groups.io wrote:
I see the USB protection device starts to conduct at 6v and at 12v
it is at least 1 amp. I would suspect that somehow the 13.8v supply
got on to the USB lines and melted/vaporised the semi-conductors. If
not 13.8v the AC supply?
The typical failure mode of a USB device when connected to the computer
and a radio is a divergence between the RF ground (shield of the feed
line) and the power line "safety" ground (chassis of the computer).
This occurs when the feedline shield (station ground, chassis of the
transceiver, "entry window", etc.) is not tightly "bonded" to the ground
rod at the power meter which connects to the safety ground (and neutral)
bus in the breaker box.

When the transceiver chassis and the computer chassis diverge in such a
way that the USB "VBus" (+5V from the computer) becomes negative with
respect to the transceiver chassis/circuit "ground" the USB protector,
any USB hub chip, USB UART and USB CODEC can all be "reverse polarized"
depending on the dissipation capability of the USB protector.

The first line of defense is properly bonding the RF ground and the
power meter ground *OUTSIDE THE BUILDING*. The second line is to bond
the chassis of the computer (yes, even a laptop) and the chassis of
the transceiver. The third line of defense is proper USB protective
design ... typically chokes in both the VBus and GND connection between
the connector and USB protector *as well as* an oversized "TRANZORB*
(effectively a 6 V Zener diode) to provide a +5V to -0.1V "Window" on
the USB power independent of the "USB protector" (which serves for the
data lines).

73,

... Joe, W4TV


On 2020-11-20 12:28 PM, David G3YYD via groups.io wrote:
I see the USB protection device starts to conduct at 6v and at 12v it is at
least 1 amp. I would suspect that somehow the 13.8v supply got on to the USB
lines and melted/vaporised the semi-conductors. If not 13.8v the AC supply?
Assuming no lightening strikes or large AC transient events, I would look at
the various connections from the 13.8v and AC supplies to see if there is a
fault in any part of the station. Or a transient event happens when plugging
and unplugging equipment with power supplies switched on.
73 David G3YYD
From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Ken
K6MR
Sent: 20 November 2020 16:58
To: Elecraft-K4@groups.io; Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] [Elecraft-K4] Repair KI03B on K3S
I'm in the process of working on two dead KIO3Bs. So far I've found that
the 3.3V regulators were blown (U9), and also the TUSB2036s. Also 3 of the
4 TPS2041B switches are also shorted. Waiting for parts. All available at
the usual places and prices are cheap.
It does look like the boards took a hit on the USB line. Kind of surprising
given that there is protection on the Digital I/O Module (USBLC6-2 ESD
protection device). These are not my boards but the owner said only the USB
functions were dead, and so far all the damage appears to be only in the USB
section.
More to come.
Ken K6MR
From: Everett N4CY via groups.io <mailto:everettsharp=aol.com@groups.io>
Sent: Friday, November 20, 2020 04:26
To: Elecraft-K3@groups.io; Elecraft-K4@groups.io
Subject: [Elecraft-K4] Repair KI03B on K3S
Two months ago I sent the KIO3B board from my K3S to Elecraft to have it
repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I
finally sent Elecraft an email asking what the status was of the board.
Finally they replied to my email and said that they would have to replace
the board, but they have no boards and would have to order them. So I sent
another email asking when they would be getting the boards. So yesterday
Evening I received an email and was told that I needed to put my name on
their list for boards.
So after yesterday's email I took a look at the schematic for the KIO3B
board and there is a integrated device on the USB input "TUSB2036" which is
a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently
Elecraft do not repair boards and just replace them. My thinking is if they
are not able to get replacement boards then why don't they repair them?
I have asked them to return the board, as I plan on trying to replacing the
TUSB2036 myself. I have a hot air rework station and will try to replace
the device and hope it works-out? At this point I am so discussed with
Elecraft that I am thinking about canceling the K4 that I have on order and
buying something else.
Everett N4CY


Re: [Elecraft] my K3 has some issues-NOT SOLVED- LowPower Amp MOSFETs

Ray Maxfield
 

Chet……..I would Check ALL the +12 Volts Connections.

The Anderson Pole Connectors have been a Issue in the Past,

Make sure you have the Genuine ones.    Ray WA6VAB

 

 

From: Chet, N8RA
Sent: Friday, November 20, 2020 8:25 AM
To: elecraft@...; Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] [Elecraft] my K3 has some issues-NOT SOLVED- LowPower Amp MOSFETs

 

Alas, my K3 power out problem WAS NOT SOLVED by replacing the LPA MOSFETs.

 

Upon first turn on, the xmit power could be set high on all bands as expected.

 

But then, after  a few hours of the radio just sitting there in receive, going to transmit it would not reach a power output past ~40 watts (varied by band and varies a few watts as it sits in transmit) and will fail the transmit gain calibration.

 

Picking up on a possible related thread, I took off the bottom rear case panel and tested the two SWR bridge diodes. They both appear to be good according to my DVM. Is that a good enough test?

 

My 12V supply voltage was a bit low according to other owners (13.4 v dropping to 12.9 v on XMIT)) so I adjusted the Astron SS-30M to 14.5 volts. Now, setting the xmit power higher works when going to TUNE, and the radio passes all the calibrate xmtr gain tests. So again I thought maybe that was it.

 

But again, nope. After being on for over 8 hours in receive, and heating up internally, it fails to reach the set 70W output.  But after being turned off for about 2 hours, it resumed producing the set 70W. See the attached chart.

 

 

Something temperature, voltage, time  related?

 

Any other ideas out there?

 

Chet, N8RA

 

 

-----Original Message-----
From: Chet S <chetsubaccount@...>
Sent: Tuesday, November 17, 2020 9:22 AM
To: 'elecraft@...' <elecraft@...>; 'Elecraft-K3@groups.io' <Elecraft-K3@groups.io>
Subject: RE: [Elecraft] my K3 has some issues-SOLVED- Low Power Amp MOSFETs

 

Replacing the final output MOSFETs in my K3’s  low power amp appears to have fixed its transmit power issues. Thank you everyone on the K3 forums for your shared advice and experiences.

 

The “3 screw” tests were pointing to a bad output transistor in the LPA. The idle current increase on the K3 meter when putting the radio into XMIT (not TUNE) was only 310 ma, where at least 600ma was expected, again pointing to a FET being open.

 

To be sure of getting the right vintage of FETs, I ordered a couple of them (and thermal insulator) from Elecraft. My order was shipped that same day and arrived via priority mail 2 days later. Great service.

 

Following the procedure described by others, I replaced both output MOSFETs. Since one had been inoperative, the other had been carrying the whole load to produce output so may have been overworked, overstressed and hurting.

 

Here are my additional comments on the repair process:

 

1) The Elecraft document “KPA3CONMDKT MOD Kit Manual” has a wonderful description of how to remove and replace the 100W amplifier to allow access to the LPA’s adjustment potentiometers.

 

2) Turning the power to zero is a good safeguard when doing the bias adjustment. I also made sure the radio was in USB or LSB so no power output would be commanded in any case.

 

Now with the FETs replaced and the bottom cover back on, the moment of truth….

 

Three LPA potentiometers turned down.

Turn first pot, +200ma.

Turn second pot, another 200ma.

Turn third pot, yet another 200ma.

Success!

 

Put the 100W amp module back in and connected to the Elecraft K3 utility.

All 3 transmitter gain tests passed, and now the power setting is stable on all bands.

 

On 40M where the reported SWR into a dummy load before the repair was 1.4 instead of 1.0  was now down to 1.2. Still do not know why but I can certainly live with that.

 

So… why did this even happen in the first place?

I can only speculate.

Older generation MOSFETs were difficult to keep in their safe operating region without snubbers. Did some transient zap it?

Power semiconductor chip bonding is subject to failure after a high number of thermal cycles, and this has been a contest radio.

In January during the VHF contest, my 6M antennas became badly detuned with wet snow and ice accumulation. This led to a high swr propagating thru the transmit chain to the K3 which suffered a total loss of power output on 6M with a very high swr indicated. After a rest, the K3 recovered, but did that event set this failure in motion? GOK.

 

And a closing suggestion- if your K3 is working OK now, save a copy of its configuration: this may turn out to be quite handy in the future.

 

TU all and 73,

Chet, N8RA

 

 

 

-----Original Message-----

From: elecraft-bounces@... <elecraft-bounces@...> On Behalf Of Chet S

Sent: Tuesday, November 10, 2020 4:02 PM

To: elecraft@...

Subject: [Elecraft] my K3 has some issues

 

Good afternoon K3 folks,

 

I am new to this list and honored to be accepted.

 

Recently my K3 has experienced a couple of issues. I have been unable to get a response from Elecraft e-mail or telephone service regarding the situation. It's been almost two weeks now so thought I'd ask here if anyone has some suggestions for me to try myself.

 

Here is the main concern:

 

When getting ready for CQWWDX SSB a few weeks ago, I went through setting the transmit power on each band to drive an amplifier properly. The power display seemed a bit sluggish and had a delay in indicating the SWR. Worse yet, when I got to 40M, I could not crank the power up past about 30 watts; it would momentarily display a higher number but then fall back to 30w. All other bands cold be set higher.

 

First I reloaded all the current firmware in the main and subreceiver. No change to 40M.

 

So next I went to the K3 Utility ver 1.20.1.15 to do a transmitter gain calibration. Starting with the 5W calibration, it stepped thru the first few bands OK but then stopped (I think on 40M) and displayed "ERR TXG" and the message "calibration settled at 3.6W, TX gain failed because transmit power did not reach the expected value".

 

In anticipation of having to send the radio to Elecraft where it might be totally reset, I manually started recording all the configuration settings.

When I looked at my filter settings, I was shocked to see that filter 1 in the subreceiver was set to 1.35. Huh? It should have been 2.80 !! Was my config info corrupted? I reset that to 2.80 and then for the heck of it tried again to set the power on 40M. That now  worked "OK"  and the swr and pwr display during "tune" showed instantly on all bands. Something had changed.

 

Next, I decided to rerun the TX calibration gain routine. This time if successfully completed the 5w and 50w routines. However, with a good dummy load, 40M displays an swr of 1.4, while the other bands are 1.0 or 1.1, so something is still a little funny on 40M. What might that be?

 

I have now been considering doing a total reset of the radio using the EE INIT function and then the self calibrations. Is this wise?

 

Any experiences or suggestions appreciated.

 

73,

Chet, N8RA

 

______________________________________________________________

Elecraft mailing list

Home: http://mailman.qth.net/mailman/listinfo/elecraft

Help: http://mailman.qth.net/mmfaq.htm

Post: mailto:Elecraft@...

 

This list hosted by: http://www.qsl.net

Please help support this email list: http://www.qsl.net/donate.html Message delivered to chetsubaccount@...

 


Re: Repair KI03B on K3S

Derek Bate
 

Very very concerned about this. Elecraft, explain yourself and your future support. This will suspend my K4 plans. No or little support means no procurement to me.
G4XEE

On Fri, 20 Nov 2020 at 14:27, Dave Cole <dave@...> wrote:
Same here...  I was under the impression Elecraft was going to do
component level repair as well.

73, and thanks,
Dave (NK7Z)


On 11/20/20 6:13 AM, Drew Vonada-Smith K3PA wrote:
> Very concerning.  I hope that Elecraft will clarify.
>
> 73,
>
> Drew K3PA
>
>






Re: K3 Locked Up - MCU LD

Jim
 

Thanks Keith

Using the original KIO3 so no USB connector
When I switch on, display immediately shows MCU LD on screen, TX LED flashes and all buttons/functions disabled
If I apply power and hold button for 10 seconds does same thing
Tried different speeds, pressing greyed out buttons etc, no joy.

Still no comms

73
Jim


Re: Shipping a KPA500 to factory.

Gerard <scanneg@...>
 

Why are repairs required?  This is expensive equipment.  Bad design should be covered by recall and re-engineering. 


On Fri 20 Nov 2020, 17:31 Rick NK7I, <Rick.NK7I@...> wrote:

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I


On 11/20/2020 8:00 AM, Jim N7US wrote:

I believe the maximum insurance available from a UPS store is $1500, and they determine the insurance pricing.  Consequently, I ship high value items only from a UPS facility (or FedEx).  FedEx Office is part of FedEx, I believe, so shipping from one of them is the same as from a FedEx facility.

 

73,  Jim N7US

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Mark Morin via groups.io
Sent: Friday, November 20, 2020 09:13
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

 

On Wed, Oct 7, 2020 at 05:33 PM, Richard Williams wrote:

I agree; for a high value item that is heavy, I use the UPS store or FedEx.  I think when you use one of these, any damage claims are honored.

I wouldn't bet on that in the case of UPS store. My experience with them was that the UPS Store would not honour the guarantee because they blamed UPS, and UPS would not honour it because they blamed the USP Store. I said it didn't matter which was responsible, but to them it did matter because, as I learned,  UPS Stores are just independent franchisees (small local businesses) and are not bound to honour UPS warrantees. I tried everything but I was out of luck. So I'll  NEVER AGAIN use UPS. 

Mark VA2MM


Re: Repair KI03B on K3S

Gerard <scanneg@...>
 

I've said it recently, there are no recalls from Elecraft.


On Fri 20 Nov 2020, 13:31 Gerard, <scanneg@...> wrote:
Set up a USB pcb repair service,  you'll make a few bucks...I think they are not at all reseliant to RF.  I was using a OCF dispole portable and it colllapsed.

On Fri 20 Nov 2020, 13:26 Everett N4CY via groups.io, <everettsharp=aol.com@groups.io> wrote:
Two months ago I sent the KIO3B board from my K3S to Elecraft to have it repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I finally sent Elecraft an email asking what the status was of the board. Finally they replied to my email and said that they would have to replace the board, but they have no boards and would have to order them. So I sent another email asking when they would be getting the boards. So yesterday Evening I received an email and was told that I needed to put my name on their list for boards. 

So after yesterday’s email I took a look at the schematic for the KIO3B board and there is a integrated device on the USB input “TUSB2036” which is a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently Elecraft do not repair boards and just replace them. My thinking is if they are not able to get replacement boards then why don’t they repair them?

I have asked them to return the board, as I plan on trying to replacing the TUSB2036 myself.  I have a hot air rework station and will try to replace the device and hope it works-out? At this point I am so discussed with Elecraft that I am thinking about canceling the K4 that I have on order and buying something else.

Everett N4CY






Re: Repair KI03B on K3S

Gerard <scanneg@...>
 

Set up a USB pcb repair service,  you'll make a few bucks...I think they are not at all reseliant to RF.  I was using a OCF dispole portable and it colllapsed.


On Fri 20 Nov 2020, 13:26 Everett N4CY via groups.io, <everettsharp=aol.com@groups.io> wrote:
Two months ago I sent the KIO3B board from my K3S to Elecraft to have it repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I finally sent Elecraft an email asking what the status was of the board. Finally they replied to my email and said that they would have to replace the board, but they have no boards and would have to order them. So I sent another email asking when they would be getting the boards. So yesterday Evening I received an email and was told that I needed to put my name on their list for boards. 

So after yesterday’s email I took a look at the schematic for the KIO3B board and there is a integrated device on the USB input “TUSB2036” which is a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently Elecraft do not repair boards and just replace them. My thinking is if they are not able to get replacement boards then why don’t they repair them?

I have asked them to return the board, as I plan on trying to replacing the TUSB2036 myself.  I have a hot air rework station and will try to replace the device and hope it works-out? At this point I am so discussed with Elecraft that I am thinking about canceling the K4 that I have on order and buying something else.

Everett N4CY






Re: [Elecraft-K4] Repair KI03B on K3S

David G3YYD
 

I see the USB protection device starts to conduct at 6v and at 12v it is at least 1 amp. I would suspect that somehow the 13.8v supply got on to the USB lines and melted/vaporised  the semi-conductors. If not 13.8v the AC supply?

 

Assuming no lightening strikes or large AC transient events, I would look at the various connections from the 13.8v and AC supplies to see if there is a fault in any part of the station. Or a transient event happens when plugging and unplugging equipment with power supplies switched on.

 

73 David G3YYD

 

From: Elecraft-K3@groups.io [mailto:Elecraft-K3@groups.io] On Behalf Of Ken K6MR
Sent: 20 November 2020 16:58
To: Elecraft-K4@groups.io; Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] [Elecraft-K4] Repair KI03B on K3S

 

I’m in the process of working on two dead KIO3Bs.  So far I’ve found that the 3.3V regulators were blown (U9), and also the TUSB2036s.  Also 3 of the 4 TPS2041B switches are also shorted.  Waiting for parts.  All available at the usual places and prices are cheap. 

 

It does look like the boards took a hit on the USB line.  Kind of surprising given that there is protection on the Digital I/O Module (USBLC6-2 ESD protection device).  These are not my boards but the owner said only the USB functions were dead, and so far all the damage appears to be only in the USB section.

 

More to come.

 

Ken K6MR

 

From: Everett N4CY via groups.io
Sent: Friday, November 20, 2020 04:26
To: Elecraft-K3@groups.io; Elecraft-K4@groups.io
Subject: [Elecraft-K4] Repair KI03B on K3S

 

Two months ago I sent the KIO3B board from my K3S to Elecraft to have it repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I finally sent Elecraft an email asking what the status was of the board. Finally they replied to my email and said that they would have to replace the board, but they have no boards and would have to order them. So I sent another email asking when they would be getting the boards. So yesterday Evening I received an email and was told that I needed to put my name on their list for boards. 

So after yesterday’s email I took a look at the schematic for the KIO3B board and there is a integrated device on the USB input “TUSB2036” which is a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently Elecraft do not repair boards and just replace them. My thinking is if they are not able to get replacement boards then why don’t they repair them?

I have asked them to return the board, as I plan on trying to replacing the TUSB2036 myself.  I have a hot air rework station and will try to replace the device and hope it works-out? At this point I am so discussed with Elecraft that I am thinking about canceling the K4 that I have on order and buying something else.

Everett N4CY



 


Re: [Elecraft-K4] Repair KI03B on K3S

Ken K6MR
 

I’m in the process of working on two dead KIO3Bs.  So far I’ve found that the 3.3V regulators were blown (U9), and also the TUSB2036s.  Also 3 of the 4 TPS2041B switches are also shorted.  Waiting for parts.  All available at the usual places and prices are cheap. 

 

It does look like the boards took a hit on the USB line.  Kind of surprising given that there is protection on the Digital I/O Module (USBLC6-2 ESD protection device).  These are not my boards but the owner said only the USB functions were dead, and so far all the damage appears to be only in the USB section.

 

More to come.

 

Ken K6MR

 

From: Everett N4CY via groups.io
Sent: Friday, November 20, 2020 04:26
To: Elecraft-K3@groups.io; Elecraft-K4@groups.io
Subject: [Elecraft-K4] Repair KI03B on K3S

 

Two months ago I sent the KIO3B board from my K3S to Elecraft to have it repaired as the USB port quit working. It sat at Elecraft for 6 weeks and I finally sent Elecraft an email asking what the status was of the board. Finally they replied to my email and said that they would have to replace the board, but they have no boards and would have to order them. So I sent another email asking when they would be getting the boards. So yesterday Evening I received an email and was told that I needed to put my name on their list for boards. 

So after yesterday’s email I took a look at the schematic for the KIO3B board and there is a integrated device on the USB input “TUSB2036” which is a 32 pin device. The cost for a TUSB2036 is $3.25 at Mouser. Apparently Elecraft do not repair boards and just replace them. My thinking is if they are not able to get replacement boards then why don’t they repair them?

I have asked them to return the board, as I plan on trying to replacing the TUSB2036 myself.  I have a hot air rework station and will try to replace the device and hope it works-out? At this point I am so discussed with Elecraft that I am thinking about canceling the K4 that I have on order and buying something else.

Everett N4CY




 


Re: [Elecraft] my K3 has some issues-NOT SOLVED- Low Power Amp MOSFETs

Barney Scholl
 

I have been watching this thread because I have noticed the same issue. I have not taken any steps to repairs yet. I will add that in my case it also comes and goes.Either it is normal or I am limited to about 40 watts.I have only seen it happen on 40 meters. I am checking by raising the power level in the tune mode. I have not been able to see any patterns. I hope someone has a idea or solution.

Barney K3LA


Re: Shipping a KPA500 to factory.

KE1F Lou
 

I recently returned my KPA500 using a Elecraft supplied box with the transformer still inside. The shipment to Elecraft was a double box. Elecraft returned the amp in a very thick single box.

Using boxes supplied by Elecraft are strong and being "self insured" is a reasonable risk.

As usual there are always exceptions to experiences. :)

My 2c worth.

73, Lou KE1F


On 11/20/2020 11:42 AM, Jim N7US wrote:
The UPS insurance isn't limited to $1500, but I believe the franchisee-owned UPS Stores have only $1500, but maybe that varies by store.



Jim N7US
Sent from Samsung tablet



-------- Original message --------
From: "Rick NK7I via groups.io" <Rick.NK7I@...>
Date: 11/20/20 10:31 AM (GMT-06:00)
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I


On 11/20/2020 8:00 AM, Jim N7US wrote:


Re: Shipping a KPA500 to factory.

Jim N7US
 

The UPS insurance isn't limited to $1500, but I believe the franchisee-owned UPS Stores have only $1500, but maybe that varies by store.



Jim N7US
Sent from Samsung tablet



-------- Original message --------
From: "Rick NK7I via groups.io" <Rick.NK7I@...>
Date: 11/20/20 10:31 AM (GMT-06:00)
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I


On 11/20/2020 8:00 AM, Jim N7US wrote:


Re: Shipping a KPA500 to factory.

Rick NK7I
 

No, the limit is much higher.  I had to send my (very early) KPA1500 back for some hardware updates, the shipping wasn't bad considering the weight (RF deck only) but the cost of the $6000 insurance was -breathtaking- to pay.

73,
Rick NK7I


On 11/20/2020 8:00 AM, Jim N7US wrote:

I believe the maximum insurance available from a UPS store is $1500, and they determine the insurance pricing.  Consequently, I ship high value items only from a UPS facility (or FedEx).  FedEx Office is part of FedEx, I believe, so shipping from one of them is the same as from a FedEx facility.

 

73,  Jim N7US

 

From: Elecraft-K3@groups.io <Elecraft-K3@groups.io> On Behalf Of Mark Morin via groups.io
Sent: Friday, November 20, 2020 09:13
To: Elecraft-K3@groups.io
Subject: Re: [Elecraft-K3] Shipping a KPA500 to factory.

 

On Wed, Oct 7, 2020 at 05:33 PM, Richard Williams wrote:

I agree; for a high value item that is heavy, I use the UPS store or FedEx.  I think when you use one of these, any damage claims are honored.

I wouldn't bet on that in the case of UPS store. My experience with them was that the UPS Store would not honour the guarantee because they blamed UPS, and UPS would not honour it because they blamed the USP Store. I said it didn't matter which was responsible, but to them it did matter because, as I learned,  UPS Stores are just independent franchisees (small local businesses) and are not bound to honour UPS warrantees. I tried everything but I was out of luck. So I'll  NEVER AGAIN use UPS. 

Mark VA2MM


my K3 has some issues-NOT SOLVED- missing picture

Chet, N8RA
 

Will a jpg get thru?

Chet, N8RA

1841 - 1860 of 35738