thought this thread was over
Bob
On Tue, 26 Feb 2019 09:17:16 -0800 Ron Genovesi
writes:
> Astron used to make s great supply. I have the same problem with
> RS-35M less then a year old.
> Worked fine for 8 or 9 months then developed a bad hum or buzz. I
> got tired of listening to it and
Our use of the power supplies was on mountain top repeater and remote
base sites. Access was generally time-consuming and sometimes
impossible at various times of the year. The Astrons, while they could
be repaired and made to work ... at least for awhile ... were just too
unreliable and
Maybe they were bought out by MFJ ;-)
Ron Genovesi
N3ETA
Sent from my iPhone
> On Feb 25, 2019, at 10:07 PM, Jim Brown wrote:
>
> YES! This is a chronic problem with Astron supplies -- I've never seen one
> that didn't have this problem! I first discovered and documented
Thanks
I’ll give it a try.
Ron Genovesi
N3ETA
Sent from my iPhone
> On Feb 26, 2019, at 9:54 AM, Dennis Moore wrote:
>
> I picked up a RS-50 from a SK estate, it had a terrible hum. Took the cover
> off and tightened all the hardware, hum went away.
>
> 73, Dennis NJ6G
>
>>
ate: 02/26/19 12:54
> Subject: Re: [Elecraft] OT: Astron linear PS regulation issues
>
> I picked up a RS-50 from a SK estate, it had a terrible hum. Took the
> cover off and tightened all the hardware, hum went away.
>
> 73, Dennis NJ6G
>
> On 2/26/2019 09:17, Ron Genovesi wrote
I picked up a RS-50 from a SK estate, it had a terrible hum. Took the
cover off and tightened all the hardware, hum went away.
73, Dennis NJ6G
On 2/26/2019 09:17, Ron Genovesi wrote:
Astron used to make s great supply. I have the same problem with RS-35M less
then a year old.
Worked fine for
The nice thing about those linear power supplies, though, was that you
COULD repair them.
73,
Scott K9MA
On 2/26/2019 09:52, Phil Kane wrote:
On 2/25/2019 6:36 PM, Kevin McQuiggin (SFU) wrote:
Not to sound like some old codger, but perhaps designs aren’t as robust as they
used to be.
More
On 2/26/2019 07:37, Jim - N4ST wrote:
(The meter
lights have been gone so long, I forgot it had meter lights.)
Speaking of meter lights: Those #47 bulbs never lasted long at 6 V, so I
used to put a resistor in series with them. Nowadays, a white LED,
rectifier, and a resistor would work
Astron used to make s great supply. I have the same problem with RS-35M less
then a year old.
Worked fine for 8 or 9 months then developed a bad hum or buzz. I got tired of
listening to it and pulled out a 35 Amp switching supply. Haven’t had the time
to pull it apart yet.
Ron Genovesi
I wanted to love a 45A Astron but it was heavy and hummed. Sold for peanuts
at a hamfest.
Replaced by Jetstream JTPS32MAB. Probably same as MFJ-4230MV and many
others. Small, quiet and cheap. Excellent regulation. If it dies, it is $80.
Ignacy, NO9E
--
Sent from:
On 2/25/2019 6:36 PM, Kevin McQuiggin (SFU) wrote:
> Not to sound like some old codger, but perhaps designs aren’t as robust as
> they used to be.
More marketplace incentive to replace rather than to repair. Then
again, no longer having a workshop or good close-up visual acuity any
more,
My Astron 35M has been in use since ~1990. I had to repair it after a
lightning strike that melted the tip of my 2M Ringo Ranger. (The meter
lights have been gone so long, I forgot it had meter lights.)
A few years ago, I bought a new 35M and it was defective. Returned it for a
2nd one that was
On 2/25/2019 7:58 PM, h...@optilink.us wrote:
Funny though, when I find a supply with the -VDC tied to chassis ground, I
always pull it - some Astrons do and some don't. All of our other linear
supplies float (HP, QJE, Acopian).
RIGHT!
73, Jim K9YC
YES! This is a chronic problem with Astron supplies -- I've never seen
one that didn't have this problem! I first discovered and documented
this issue almost 10 years ago. In one supply, the two clam-shell
sections of the chassis were also insulated from each other by paint!
This failure
I have had very good results with Astron, but I treat their products
like MFJ's: When I get a new one, I always open it up, check that
everything is tight, remove paint if needed, look at the soldering, etc.
It is worth checking the tightness of the connections to the capacitors
every 20 years
] OT: Astron linear PS regulation issues
That's interesting. About the only way I know that a linear supply can be
noisy is if the regulator oscillates. That can easily happen. Most of them
use emitter followers, which are often unstable driving a capacitive load.
That's usually easy to fix
Sent: Monday, February 25, 2019 8:13 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Astron linear PS regulation issues
That's interesting. About the only way I know that a linear supply can be
noisy is if the regulator oscillates. That can easily happen. Most of them
use emitter
: Monday, February 25, 2019 10:24 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Astron linear PS regulation issues
I have two recent vintage Astron RS-35M units. They still use the exact same
723-based regulator circuit that they have used for thirty years or more, so
the design
I have two recent vintage Astron RS-35M units. They still use the exact
same 723-based regulator circuit that they have used for thirty years or
more, so the design hasn't changed. What **may** have changed is the
build quality. I carefully inspected both of mine right after taking
delivery. I
I have a ~30-year old Astron 13.8 VDC 20-amp supply that I got when it was
retired from a project at work. I used it for low current applications for a
few years, then it went to storage for about 5 years.
One of the two power transistors failed a few months ago and this took out some
other
I have personally found several instances in power supplies I either own
or have repaired where the green power wire lug is firmly attached by
the bolt and nut. It however was nicely insulated by the paint!.
Visual inspection is the best way to determine if an issue exists. Do
take time
Who makes a better linear power supply, especially large ones?
John KK9A
Fred Jensen k6dgw wrote:
I've given up on Astron despite the fact that many people say they never
have troubles. Apparently, Astron does not have a supplier for inside
star washers for screw/bolt connectors, I've found
That's interesting. About the only way I know that a linear supply can
be noisy is if the regulator oscillates. That can easily happen. Most of
them use emitter followers, which are often unstable driving a
capacitive load. That's usually easy to fix by inserting a small
inductance between the
On Monday, February 25, 2019 4:26:40 PM CST Rose wrote:
> I've found instances of regulation failures caused
> by loose hardware.
With the RS-35m Astron Linear PS I have issues with noise. I purchased the
PS because everyone around me swears that they are great. Well, from my
experience the
How old is your PS?
73,
Bill
K9YEQ
https://wrj-tech.com/
-Original Message-
From: elecraft-boun...@mailman.qth.net On
Behalf Of Fred Jensen
Sent: Monday, February 25, 2019 4:52 PM
To: elecraft@mailman.qth.net
Subject: Re: [Elecraft] OT: Astron linear PS regulation issues
I've given
I've given up on Astron despite the fact that many people say they never
have troubles. Apparently, Astron does not have a supplier for inside
star washers for screw/bolt connectors, I've found almost crumbly,
crystallized cold solder joints on the point-to-point wiring terminals
[in one
I've found instances of regulation failures caused
by loose hardware. In particular the nuts atop the
filter caps that hold the regulator PC board loosen
and simply tightening then will cure the issue. This
appears to be caused by compression of the PC board
material …"cold flow" to some
27 matches
Mail list logo
