You did not show any of the prior information (one of the problems with
posts from Nabble), so I can only guess that you are working with a
power supply problem.
A situation like that is often caused by something loose in the negative
side of the supply, something that is frequently overlooked.
Good morning Don. The PS suddenly died on me at our beach house in Long Beach.
I had no equipment there and first
assumed it was my K3. Brought the rig home to Portland and it worked fine.
So, it was the supply, an Astron RS35A--couple years old.
Anyway, checked the fuse, cleaned contacts
Sounds like you could be tripping the over voltage protection. When there is
no other
fault the current limiting built into the supply folds the current back so that
it does not
blow the fuse. You can disconnect the wire going to the scr that is the OV
clamp and see
if it's ok. You can then
Gary,
One thing to check is the tightness of the screws for the supply output
terminals. If one or both are loose, I recommend removing them
completely and cleaning the contact points on the inside of the power
supply. Tighten everything else up too while you are at it.
You don't have to
Discharge the cap BEFORE trying to tighten or loosen the screws.
From: Vic K2VCO k2vco@gmail.com
To: elecraft@mailman.qth.net
Sent: Thursday, October 17, 2013 3:37 PM
Subject: Re: [Elecraft] K3 suddenly dies
Sometimes the screws holding the board
Sometimes the screws holding the board to the capacitors loosen up after a few
years.
On 10/17/2013 7:14 AM, Gary, W7TEA wrote:
Good morning Don. The PS suddenly died on me at our beach house in Long Beach.
I had
no equipment there and first assumed it was my K3. Brought the rig home to
I have had the board off a couple of times to reseat and then to change out the
voltage reg IC and to
adjust the trimmer. I have done a visual inspection but will check that all
hardware is
securely fastened. May have to invest in another assembled board if nothing
else works.
Thank you all
I have an Astron 35A and was fishing around for details and found a guy
who talked about replacing the circuit board. I'm not sure it's
necessary, but here's the link:
http://www.repeater-builder.com/astron/pdf/w5bwc-rs35-rebuild.pdf
On Thu, 17 Oct 2013, Gary, W7TEA wrote:
I have had the
Thank you Hisashi! I called Astron and they quoted $26US including shipping.
Gary
On Oct 17, 2013, at 2:26 PM, Hisashi T Fujinaka [via Elecraft]
ml-node+s365791n757998...@n2.nabble.com wrote:
I have an Astron 35A and was fishing around for details and found a guy
who talked about
Keep in mind that the article I sent you is a complete refurb that even
replaces the pass transistors.
I think googling around said the most likely culprit is a bad LM723, but
I didn't look too hard since my Astron was working fine before I decided
it made a nice footrest and bought a switching
Well, traded out the voltage regulator IC and no joy. Then I tried Deoxit on
the adjustment pot, tweaked it a bit and measured voltage at 13.8vdc!
Great! Turned it off and on, tried it again, and was ready start bragging to
the XYL---but it was back to .8v. Didn't see any suspect components
Well, I brought the RS35A (over 30 years old I think) and cable from the home
QTH to start substituting. First though, I cleaned the cable ends of the
offending set up and it tested at 13.8v. I plugged it into the K3 and it
fired up. Then I transmitted at low power and started getting feedback
to blow a fuse when
this happens, but it would be a thread of it's own.
Dick, n0ce
- Original Message -
From: Gary, W7TEA
To: elecraft@mailman.qth.net
Sent: Monday, September 30, 2013 10:29 AM
Subject: Re: [Elecraft] K3 suddenly dies
I will be at the scene
]
Sent: Monday, September 30, 2013 10:29 AM
Subject: Re: [Elecraft] K3 suddenly dies
I will be at the scene of the suspect power supply the end of next week and
will clean the cable and fuse as suggested. QTH is on the Long Beach WA
peninsula 300m from the beach so connections
Yes.
73 Ron AC7AC
-Original Message-
From: elecraft-boun...@mailman.qth.net
[mailto:elecraft-boun...@mailman.qth.net] On Behalf Of Gary, W7TEA
Sent: Friday, October 04, 2013 1:53 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 suddenly dies
Thank you Dick. I
...@mailman.qth.net] On Behalf Of Gary, W7TEA
Sent: Friday, October 04, 2013 1:53 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] K3 suddenly dies
Thank you Dick. I will be returning to that QTH with another power supply
and cable, deoxit and sandpaper to clean connections. I did turn
: Friday, October 04, 2013 3:52 PM
Subject: Re: [Elecraft] K3 suddenly dies
Thank you Dick. I will be returning to that QTH with another power supply
and cable, deoxit and sandpaper to clean connections. I did turn the
offending Astron supply off and on at the switch but didn't unplug
I will be at the scene of the suspect power supply the end of next week and
will clean the cable and fuse as suggested. QTH is on the Long Beach WA
peninsula 300m from the beach so connections certainly could use attention.
Maybe it is that simple. I will take my working PS and cable to try
Good news! Brought the rig home and connected to a different RS-35A and
cable and all is well!! So, it's either the power supply or cable--easy and
much less expensive fixes.
Thank you all for your suggestions!
Gary W7TEA
-
73,
Gary W7TEA K3 #1001, #5763
--
View this message in
no voltage to
the radio.
Dick, n0ce
- Original Message -
From: W7TEA Gary gt...@mac.com
To: elecraft@mailman.qth.net
Sent: Saturday, September 28, 2013 5:48:46 PM
Subject: Re: [Elecraft] K3 suddenly dies
Good news! Brought the rig home and connected to a different RS-35A and
cable
Subject: Re: [Elecraft] K3 suddenly dies
Good news! Brought the rig home and connected to a different RS-35A and
cable and all is well!! So, it's either the power supply or cable--easy and
much less expensive fixes.
Thank you all for your suggestions!
Gary W7TEA
-
73,
Gary W7TEA K3
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple of bands to make sure it was working
and the SWR appropriate. All was fine. Today I turned it on and was
listening on the bands. I responded to a CQ on CW and caught that the SWR
Gary,
Contact k3supp...@elecraft.com before they go home for the weekend.
73,
Don W3FPR
On 9/27/2013 2:30 PM, Gary, W7TEA wrote:
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple of bands to make sure it was working
and the SWR
Gary,
The power supply is on, the power cable is properly connected.
What voltage do you measure on the power cable at the rig end?
On 9/27/2013 2:30 PM, Gary, W7TEA wrote:
Have been away from my K3(#5763)/P3 for a couple months. Hooked it back up
yesterday and transmitted on a couple
This is part of the problem. I'm at another QTH without any equipment so
can't measure the voltage on the rig end of the power cable. Gary from
Elecraft told me that if that tests OK and rig still doesn't fire up, that I
will have to send it in. Taking rig home Monday and putting on a different
that antenna first.)
Dick, n0ce
- Original Message -
From: W7TEA Gary gt...@mac.com
To: elecraft@mailman.qth.net
Sent: Friday, September 27, 2013 9:42:43 PM
Subject: Re: [Elecraft] K3 suddenly dies
This is part of the problem. I'm at another QTH without any equipment so
can't measure the voltage
Just checked supply. Fuse looks good and while I can't measure voltage under
load, it is putting out 12v as my keyer came to life and greeted me!
Gary W7TEA.
-
73,
Gary W7TEA K3 #1001, #5763
--
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