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Astron 25 amp supply

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Thom LaCosta-2

Astron 25 amp supply

Can I use an Astron 25 amp supply a K3-100?

Thanks

Thom

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M0XDF

Re: Astron 25 amp supply

is that a question about 25 amps being enough - if so, then yes, since
I use a 22amp supply over here with no problem
73 de M0XDF, K3 #174
--
The nice thing about standards is that there are so many of them to
choose
from. -Andrew Tannenbaum, computer science professor (1944- )

On 29 Sep 2009, at 10:21, Thom LaCosta wrote:

> Can I use an Astron 25 amp supply a K3-100?
>
> Thanks
>
> Thom
>
> ______________________________________________________________
> Elecraft mailing list
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Geoffrey Mackenzie-Kennedy

Re: Astron 25 amp supply

In reply to this post by Thom LaCosta-2

Thom,

A PSU rated for 25 amps should be adequate in terms of current for a 100
watt transmitter. Something else that must be considered, especially if SSB
is used, is that the PSU's output voltage should remain constant at all
transmitter power levels. Also the DC supply voltage measured at the rig's
DC input connector should remain reasonably constant under the same
conditions of current draw. With a well regulated PSU supplying +13.8 VDC
and low resistance connecting leads and connectors, the voltage droop as
seen at the rig end can be held to 0.5 volts or less.

73,
Geoff
GM4ESD

----- Original Message -----
From: "Thom LaCosta" <[hidden email]>
To: <[hidden email]>
Sent: Tuesday, September 29, 2009 10:21 AM
Subject: [Elecraft] Astron 25 amp supply

> Can I use an Astron 25 amp supply a K3-100?
>
> Thanks
>
> Thom

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Mike K2MK

Re: Astron 25 amp supply

In reply to this post by Thom LaCosta-2

Hi Thom:

You didn't state the model number. I use the RS-35M which is a 25 watt
continuous duty supply. I use an amp on most bands but operate full 100
watts on 30 and 6 meters and never had a problem with the power supply. It's
left on 24/7 and has been in operation for close to a year.

73,
Mike K2MK

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Dan Copeland

speakers

I am looking at speakers for my K3. I have looked
At the various computer speakers but don't know
Which of the many available would work best. Does
Anyone have an opinion on which set is best :-).
Also should I get a set with a sub?

Thanks

Dan N0DT K3 #3388

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w8fn

Re: Astron 25 amp supply

In reply to this post by Mike K2MK

I've been using an Astron SS-30M switcher with my K3 for a while now
and previously used it with an Icom 746 for 7 years with no problem.
The SS-30M is rated by Astron at 25 Amps continuous and 30A "ICS".
The "ICS" rating should not be confused with the widely accepted
"ICAS" (Intermittent Commercial and Amateur Service) rating that has
been around for years. ICS is an Astron invention that purports to
represent a typical duty cycle for ham use and allows them to claim
higher current capability than the supply would have in truly heavy
duty service. I would not recommend using any Astron supply rated at
less than 25A ICS for a 100W HF radio. That being said, the SS-30 has
performed flawlessly for me for a long time, and there are thousands
of them out there that seem to be working equally well.

73...
Randy, W8FN

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Bob Naumann W5OV

Re: speakers

In reply to this post by Dan Copeland

Dan,

Computer speakers are intended to play music and sound effects, not
communications audio.

Get a communications speaker. Mono, no amplifier, no sub-woofer.

Even better, use headphones.

73,

Bob W5OV

> I am looking at speakers for my K3. I have looked
> At the various computer speakers but don't know
> Which of the many available would work best. Does
> Anyone have an opinion on which set is best :-).
> Also should I get a set with a sub?
>
> Thanks
>
> Dan N0DT K3 #3388
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
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>

Don Wilhelm-4

Re: speakers

In reply to this post by Dan Copeland

Dan,

I see no need for a sub-woofer for use with the K3.
If you are running an amplifier, you may want to look at shielded
speakers (usually non-amplified) because those with amplifiers are
usually prone to RF problems.
The K3 has adequate audio to drive non-amplified speakers. If you use
AFX or you have the subRX you will want 2 speakers, but there is no need
for any more than that, the K3 does not do Dolby Surround sound or
anything of that nature.

If you want great low-frequency bass response in shielded speakers you
may have to look to what is available in the pro-audio field, but for
only communications quality, the Motorola speakers available on Ebay or
at hamfests will do the job for you.

73,
Don W3FPR

Dan Copeland wrote:

AC7AC

Re: Astron 25 amp supply

In reply to this post by w8fn

CONTENTS DELETED

The author has deleted this message.

wayne burdick

Re: speakers

Administrator

In reply to this post by Dan Copeland

Hi Dan,

I recommend a pair of Best Buy "Insignia, 4-inch, 3-way surround
speakers" (same as the KLH Model 970A or other similar models). These
are unpowered bookcase speakers, but provide plenty of volume when
used with the K3. They're very inexpensive and sound great. Size:
about 4"W x 8"H x 4"D.

Having two speakers allows you to get L/R separation of the main and
subreceivers, as well as take advantage of the K3's "AFX" simulated
stereo mode.

73,
Wayne
N6KR

On Sep 29, 2009, at 7:00 AM, Dan Copeland wrote:

> I am looking at speakers for my K3....

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Mel

Re: speakers

In reply to this post by Don Wilhelm-4

Hi all,

Just a comment on speakers. I use cans or a small computer speaker, non-amplified, for most SSB and CW work. However, I do a reasonable amount of SW and BC listening with the K3 with the 6KHz filter and find an old HiFi combo speaker with a 8" woofer to be most pleasant to listen to.

Mel, K6KBE

--- On Tue, 9/29/09, Don Wilhelm <[hidden email]> wrote:

From: Don Wilhelm <[hidden email]>
Subject: Re: [Elecraft] speakers
To: "Dan Copeland" <[hidden email]>
Cc: [hidden email]
Date: Tuesday, September 29, 2009, 8:47 AM

Dan,

I see no need for a sub-woofer for use with the K3.
If you are running an amplifier, you may want to look at shielded
speakers (usually non-amplified) because those with amplifiers are
usually prone to RF problems.
The K3 has adequate audio to drive non-amplified speakers. If you use
AFX or you have the subRX you will want 2 speakers, but there is no need
for any more than that, the K3 does not do Dolby Surround sound or
anything of that nature.

If you want great low-frequency bass response in shielded speakers you
may have to look to what is available in the pro-audio field, but for
only communications quality, the Motorola speakers available on Ebay or
at hamfests will do the job for you.

73,
Don W3FPR

Dan Copeland wrote:

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Bill K9YEQ

Re: speakers

In reply to this post by wayne burdick

I use my PC speaker system and control mixer with good results. These are
the creative 3 tweeters per channel and a subwoofer adjusted for natural
sound. The K3 sounds excellent even into this amplified system.

73,

Bill
K9YEQ
K2 #35; KX1 #35; K3 #1744; mini mods
ATS-3B
-----Original Message-----
From: [hidden email]
[mailto:[hidden email]] On Behalf Of Wayne Burdick

Hi Dan,

I recommend a pair of Best Buy "Insignia, 4-inch, 3-way surround
speakers" (same as the KLH Model 970A or other similar models). These
are unpowered bookcase speakers, but provide plenty of volume when
used with the K3. They're very inexpensive and sound great. Size:
about 4"W x 8"H x 4"D.

Having two speakers allows you to get L/R separation of the main and
subreceivers, as well as take advantage of the K3's "AFX" simulated
stereo mode.

73,
Wayne
N6KR

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Larry - K2GN

Re: speakers

In reply to this post by wayne burdick

Wayne:
or anyone.
Ever try the Motorola Mobile speakers.
I have 2 in the metal case and some in the plastic case.
I like then but I've used them for years on all my radios.
Great sound

de K2GN/Larry
K3 - S/N 3278
----- Original Message -----
From: "Wayne Burdick" <[hidden email]>
To: "Dan Copeland" <[hidden email]>
Cc: <[hidden email]>
Sent: Tuesday, September 29, 2009 12:58 PM
Subject: Re: [Elecraft] speakers

> Hi Dan,
>
> I recommend a pair of Best Buy "Insignia, 4-inch, 3-way surround
> speakers" (same as the KLH Model 970A or other similar models). These
> are unpowered bookcase speakers, but provide plenty of volume when
> used with the K3. They're very inexpensive and sound great. Size:
> about 4"W x 8"H x 4"D.
>
> Having two speakers allows you to get L/R separation of the main and
> subreceivers, as well as take advantage of the K3's "AFX" simulated
> stereo mode.
>
> 73,
> Wayne
> N6KR
>
> On Sep 29, 2009, at 7:00 AM, Dan Copeland wrote:
>
>> I am looking at speakers for my K3....
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
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Tom Hammond-2

Re: speakers

In reply to this post by Dan Copeland

Hi Dan:

>I am looking at speakers for my K3. I have looked
>At the various computer speakers but don't know
>Which of the many available would work best. Does
>Anyone have an opinion on which set is best :-).
>Also should I get a set with a sub?

Some (possibly many) PC speakers include internal amplifiers which can be
susceptible to RFI which results in "thumps 'n 'bumps in the night".

I have settled on a pair of (UNamplified) 8-Ohm Motorola mobile speakers
I bought off EBay for $5 each, plus shipping. They are a very dark brown
case, which is almost dark enough to be taken for black, and match the K3
nicely.

Trying top plug two (2) separate (UNamplified) speakers into the single
1/8" stereo jack in the back of the K3 was getting to be a PITA... I had
two wires going different directions (L and R) RIGHT OUT OF THE BACK OF
THE K3, which made things a bit 'busier' than I wanted. So I fabricated
a 'splitter' for the speakers... a single 2-wire/shielded cable (about
8" long) to a 1/8" stereo plug goes into the back of the K3. The cable
terminates in a small PC board containing two (2) 1/8" STEREO jacks of
which only the TIP and SLEEVE are used (RING = N/C). This allows me to
plug in speakers which are terminated in mono OR stereo jacks and to not
have to worry about possibly plugging a mono plug into the stereo jack
on the K3. Yeah, I know, there have been mods for the K3 to prevent
damage if I mono plug was plugged into the stereo jack, but this helps
to ensure that I never do it regardless of the preventative mods! It
also helps to get the two wires (to the two speakers) out and a bit away
from the immediate read of the K3, making wire 'congestion' a bit easier
to handle. Thought I've not done so (yet), if there's any interest in
the 2-speaker 'splitter', I'll put the info out on my web site for general
access.

73,

Tom Hammond N0SS

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MontyS

Re: speakers

All this talk about speakers prompted me to resurrect a pair of Apple
amplified speakers that have very good frequency response. All was well
until I tried 10 and 6 meters - then got the "thumps and bumps" in the form
of a loud hum. Tried FOE (ferrite on everything) first with no success.
Opened up the speaker and found not one bypass capacitor. I put one
(.01ufd) across the power plug, and after zapping the amplifier module, one
across each of the stereo amp's power inputs. Perfectly quiet now.
Monty K2DLJ

> Some (possibly many) PC speakers include internal amplifiers which can be
> susceptible to RFI which results in "thumps 'n 'bumps in the night".
>
>
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AD4C2009

Re: Astron 25 amp supply

In reply to this post by w8fn

My two cents,this might be a good choice for you,for about 4 years I have been using an Alinco DM-340MV 35A analog power supply to feed all the radios I have owned before,IC-756ProIII,FT-950,FT-2000 and now the K3,its very stable,even taking out 25A continuos the drop of voltage from 13.8 at the output is just 0.2V and the ripple is no more than 100 mV on the scope,it has two meters,one for voltage and one for amperes,good looking,black color to match the radio,I payed around $175,I think its a good choice for the K3 and its no switching,so it will not generate any "birdies" on any band,good luck with your search,73

AD4C

"For a refined ham it is compulsory to own a k3"

--- On Tue, 9/29/09, Randy Farmer <[hidden email]> wrote:

From: Randy Farmer <[hidden email]>
Subject: Re: [Elecraft] Astron 25 amp supply
To: [hidden email]
Date: Tuesday, September 29, 2009, 2:09 PM

I've been using an Astron SS-30M switcher with my K3 for a while now
and previously used it with an Icom 746 for 7 years with no problem.
The SS-30M is rated by Astron at 25 Amps continuous and 30A "ICS".
The "ICS" rating should not be confused with the widely accepted
"ICAS" (Intermittent Commercial and Amateur Service) rating that has
been around for years. ICS is an Astron invention that purports to
represent a typical duty cycle for ham use and allows them to claim
higher current capability than the supply would have in truly heavy
duty service. I would not recommend using any Astron supply rated at
less than 25A ICS for a 100W HF radio. That being said, the SS-30 has
performed flawlessly for me for a long time, and there are thousands
of them out there that seem to be working equally well.

73...
Randy, W8FN

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Joe Subich, W4TV-4

Re: speakers

In reply to this post by wayne burdick

I've had very good results with a pair of Sony B-1000
bookshelf speakers. They're just slightly larger than
the Insignia/KLH and can often be found at Radio Shack,
Best Buy and others for $49.95 (per pair) on sale.

73,

... Joe, W4TV

> -----Original Message-----
> From: [hidden email]
> [mailto:[hidden email]] On Behalf Of Wayne Burdick
> Sent: Tuesday, September 29, 2009 12:58 PM
> To: Dan Copeland
> Cc: [hidden email]
> Subject: Re: [Elecraft] speakers
>
>
> Hi Dan,
>
> I recommend a pair of Best Buy "Insignia, 4-inch, 3-way surround
> speakers" (same as the KLH Model 970A or other similar
> models). These
> are unpowered bookcase speakers, but provide plenty of volume when
> used with the K3. They're very inexpensive and sound great. Size:
> about 4"W x 8"H x 4"D.
>
> Having two speakers allows you to get L/R separation of the main and
> subreceivers, as well as take advantage of the K3's "AFX" simulated
> stereo mode.
>
> 73,
> Wayne
> N6KR
>
> On Sep 29, 2009, at 7:00 AM, Dan Copeland wrote:
>
> > I am looking at speakers for my K3....
>
> ______________________________________________________________
> Elecraft mailing list
> Home: http://mailman.qth.net/mailman/listinfo/elecraft
> Help: http://mailman.qth.net/mmfaq.htm
> Post: mailto:[hidden email]
>
> This list hosted by: http://www.qsl.net
> Please help support this email list: http://www.qsl.net/donate.html

Lu Romero - W4LT

Re: speakers

In reply to this post by Dan Copeland

OK, All this talk about speakers, I may as well chime in.

I have used a pair of JBL Control-1 Bookshelf size two way
speakers in my amateur station since I got out of
Broadcasting. I used these speakers in various TV station
master control rooms to monitor air for quality, and I
bought a pair of (tax deductible!) ones for home so that I
could hear my stations at home through the same transducers
what the MCR guys were using at work for less "margin of
error"... Acoustics non withstanding (I have audio dweeb
tendencies... Just ask at the Fox, NBC and ABC network
TOC's).

When I no longer needed them in the living room "off-air
monitoring position", I moved them to my ham shack.
Listening to my TS430S, TS570D and TS850SAT has been
rewarding through them. I look forward to listening to the
extended bass response on the K3 through these very nice
transducers.

They are way overkill for ham radio, but they were just
sitting there in 1999 with nothing important to do... :)

I also have several of the old Nokia mobile phone car
installation kit speakers that came with their hands free
kit, refugees from decomissioned AMPS phones in News Vans.
These small plastic case speakers with gimball mounts sound
surprisingly good! I now use one of these as the main
speaker for the TS570 secondary radio. They are all black
and built solidly to take mobile abuse. I also have one in
the car for my mobile VHF/UHF rig. You can often find them
at hamfests and flea markets for around $5.

Ordinarily, I use headsets when operating. But for guests
in the shack, the speakers are a requirement :)

-lu-W4LT-
K3 #3192 (Now somewhere in Kansas, on its way back from
Aptos with new encoders)

Message: 10
Date: Tue, 29 Sep 2009 14:05:01 -0400
From: "Larry - K2GN" <[hidden email]>
Subject: Re: [Elecraft] speakers
To: "Wayne Burdick" <[hidden email]>, "Dan Copeland"
<[hidden email]>
Cc: [hidden email]
Message-ID: <75314D2048D049CC888CFFBB4209BD7C@K2GN>
Content-Type: text/plain; format=flowed;
charset="iso-8859-1";
reply-type=original

Wayne:
or anyone.
Ever try the Motorola Mobile speakers.
I have 2 in the metal case and some in the plastic case.
I like then but I've used them for years on all my radios.
Great sound

de K2GN/Larry
K3 - S/N 3278
----- Original Message -----
From: "Wayne Burdick" <[hidden email]>
To: "Dan Copeland" <[hidden email]>
Cc: <[hidden email]>
Sent: Tuesday, September 29, 2009 12:58 PM
Subject: Re: [Elecraft] speakers

> Hi Dan,
>
> I recommend a pair of Best Buy "Insignia, 4-inch, 3-way
surround
> speakers" (same as the KLH Model 970A or other similar
models). These
> are unpowered bookcase speakers, but provide plenty of
volume when
> used with the K3. They're very inexpensive and sound
great. Size:
> about 4"W x 8"H x 4"D.
>
> Having two speakers allows you to get L/R separation of
the main and
> subreceivers, as well as take advantage of the K3's "AFX"
simulated

> stereo mode.
>
> 73,
> Wayne
> N6KR
>
> On Sep 29, 2009, at 7:00 AM, Dan Copeland wrote:
>
>> I am looking at speakers for my K3....
>