Thanks! Astron it is.
Bob W7OTJ
On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker [email protected] wrote:
Bob: I echo Frank¹s good input. I would append this with recommendation to use a linear (not switching) Astron Power supply because they¹re electrically quiet. If your P/S needs to power the radio only, an Astron RS-35M would be large enough. On the other hand, if you also need to power other devices (such as linear power amplifier), then you¹ll need to go bigger or use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% (approx.) duty cycle.. Great for CW or SSB. However for any full duty cycle mode such as WSJT, FM? etc, then you need to derate the power supply so it¹s capabilities are not exceeded. Switch-mode Power Supplies (switching supplies or 'switchers¹) are smaller and lighter weight with the trade-off that they generate electrical noise (because of how they regulate the output level) and inherently are noisy. Linear supplies are bigger and heavier (and less power-efficient) but for those trades, one gets absolute electrical quiet performance because they don¹t hot-switch power signals away from a zero-crossing. If you wish to see an animated Œhow switching power supplies work¹ video (approx. 14 minutes), here¹s one I share when explaining this concept. https://www.youtube.com/watch?v=vwJYIorz_Aw
Very 73,
Dave KJ9I
On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" <[email protected] on behalf of [email protected]> wrote:
I have used Astron power supplies for years. Pick the appropriate current rating.
Frank K6FW
On Feb 10, 2019, at 7:15 AM, Bob Hammond [email protected] wrote:
I'm ready to order mine along with a power supply. Any suggestions on PS?
Bob W7OTJ
On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer [email protected] wrote:
FYI - When I ordered mine from DXEngineering (due to the reservation I placed), they said if the price drops from the $2098 before it ships, it will sell for the lower price. That also do not charge one¹s credit card until it ships.
Tom NY4I
On Feb 9, 2019, at 9:44 PM, radiomb [email protected] wrote:
Just purchased a IC9700 today at Hamcation. It was great to see one in
person. I got it for $1995. Icom said all back orders should be filled by end of April. They said they should have enough in stock so that anyone that wants one at Dayton can get it. I was happy to get it for $1995. No tax or shipping.
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
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AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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I have several RS35Ms and they have been trouble-free.
AFter an ARRL review several years back, I tried an SS-30. (The Astrons were significantly quieter than anything else that they tested.) No RF noise that I could detect. That said, I have not put a scope on the DC lines, but will when I get a chance.
I have bought several more SS-30s and had no noise problem with them. So, for Field Day and PA QSO Party, I carry a switcher. (Weight!!)
Good luck & very 73,
Jim
On 2/10/2019 1:16 PM, Bob Hammond wrote:
Thanks! Astron it is.
Bob W7OTJ
On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker [email protected] wrote:
Bob: I echo Frank¹s good input. I would append this with recommendation to use a linear (not switching) Astron Power supply because they¹re electrically quiet. If your P/S needs to power the radio only, an Astron RS-35M would be large enough. On the other hand, if you also need to power other devices (such as linear power amplifier), then you¹ll need to go bigger or use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% (approx.) duty cycle.. Great for CW or SSB. However for any full duty cycle mode such as WSJT, FM? etc, then you need to derate the power supply so it¹s capabilities are not exceeded. Switch-mode Power Supplies (switching supplies or 'switchers¹) are smaller and lighter weight with the trade-off that they generate electrical noise (because of how they regulate the output level) and inherently are noisy. Linear supplies are bigger and heavier (and less power-efficient) but for those trades, one gets absolute electrical quiet performance because they don¹t hot-switch power signals away from a zero-crossing. If you wish to see an animated Œhow switching power supplies work¹ video (approx. 14 minutes), here¹s one I share when explaining this concept. https://www.youtube.com/watch?v=vwJYIorz_Aw
Very 73,
Dave KJ9I
On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" <[email protected] on behalf of [email protected]> wrote:
I have used Astron power supplies for years. Pick the appropriate current rating.
Frank K6FW
On Feb 10, 2019, at 7:15 AM, Bob Hammond [email protected] wrote:
I'm ready to order mine along with a power supply. Any suggestions on PS?
Bob W7OTJ
On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer [email protected] wrote:
FYI - When I ordered mine from DXEngineering (due to the reservation I placed), they said if the price drops from the $2098 before it ships, it will sell for the lower price. That also do not charge one¹s credit card until it ships.
Tom NY4I
On Feb 9, 2019, at 9:44 PM, radiomb [email protected] wrote:
Just purchased a IC9700 today at Hamcation. It was great to see one in
person. I got it for $1995. Icom said all back orders should be filled by end of April. They said they should have enough in stock so that anyone that wants one at Dayton can get it. I was happy to get it for $1995. No tax or shipping.
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views of
AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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My RS-35M has served me well for nearly 19 years, so I'll add to that recommendation.
73,
Paul, N8HM
On Sun, Feb 10, 2019 at 1:28 PM Jim Sanford [email protected] wrote:
I have several RS35Ms and they have been trouble-free.
AFter an ARRL review several years back, I tried an SS-30. (The Astrons were significantly quieter than anything else that they tested.) No RF noise that I could detect. That said, I have not put a scope on the DC lines, but will when I get a chance.
I have bought several more SS-30s and had no noise problem with them. So, for Field Day and PA QSO Party, I carry a switcher. (Weight!!)
Good luck & very 73,
Jim
On 2/10/2019 1:16 PM, Bob Hammond wrote:
Thanks! Astron it is.
Bob W7OTJ
On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker [email protected] wrote:
Bob: I echo Frank¹s good input. I would append this with recommendation to use a linear (not switching) Astron Power supply because they¹re electrically quiet. If your P/S needs to power the radio only, an Astron RS-35M would be large enough. On the other hand, if you also need to power other devices (such as linear power amplifier), then you¹ll need to go bigger or use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% (approx.) duty cycle.. Great for CW or SSB. However for any full duty cycle mode such as WSJT, FM? etc, then you need to derate the power supply so it¹s capabilities are not exceeded. Switch-mode Power Supplies (switching supplies or 'switchers¹) are smaller and lighter weight with the trade-off that they generate electrical noise (because of how they regulate the output level) and inherently are noisy. Linear supplies are bigger and heavier (and less power-efficient) but for those trades, one gets absolute electrical quiet performance because they don¹t hot-switch power signals away from a zero-crossing. If you wish to see an animated Œhow switching power supplies work¹ video (approx. 14 minutes), here¹s one I share when explaining this concept. https://www.youtube.com/watch?v=vwJYIorz_Aw
Very 73,
Dave KJ9I
On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" <[email protected] on behalf of [email protected]> wrote:
I have used Astron power supplies for years. Pick the appropriate current rating.
Frank K6FW
On Feb 10, 2019, at 7:15 AM, Bob Hammond [email protected] wrote:
I'm ready to order mine along with a power supply. Any suggestions on PS?
Bob W7OTJ
On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer [email protected] wrote:
FYI - When I ordered mine from DXEngineering (due to the reservation I placed), they said if the price drops from the $2098 before it ships, it will sell for the lower price. That also do not charge one¹s credit card until it ships.
Tom NY4I
> On Feb 9, 2019, at 9:44 PM, radiomb [email protected] wrote: > > Just purchased a IC9700 today at Hamcation. It was great to see one > in person. I got it for $1995. Icom said all back orders should be filled by end of April. They said they should have enough in stock so that anyone that wants one at Dayton can get it. I was happy to get it for $1995. No tax or shipping. > _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. Opinions expressed > are solely those of the author, and do not reflect the official views > of AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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At the risk of sounding like "My dad is stronger than your dad", here's my experience. I have two Astron Power Supplies which I bought in 1985. They still work like champs.
Rolf NR0T
On Sun, Feb 10, 2019, 12:57 PM Paul Stoetzer [email protected] wrote:
My RS-35M has served me well for nearly 19 years, so I'll add to that recommendation.
73,
Paul, N8HM
On Sun, Feb 10, 2019 at 1:28 PM Jim Sanford [email protected] wrote:
I have several RS35Ms and they have been trouble-free.
AFter an ARRL review several years back, I tried an SS-30. (The Astrons were significantly quieter than anything else that they tested.) No RF noise that I could detect. That said, I have not put a scope on the DC lines, but will when I get a chance.
I have bought several more SS-30s and had no noise problem with them. So, for Field Day and PA QSO Party, I carry a switcher. (Weight!!)
Good luck & very 73,
Jim
On 2/10/2019 1:16 PM, Bob Hammond wrote:
Thanks! Astron it is.
Bob W7OTJ
On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker <
wrote:
Bob: I echo Frank¹s good input. I would append this with recommendation
to use
a linear (not switching) Astron Power supply because they¹re
electrically
quiet. If your P/S needs to power the radio only, an Astron RS-35M
would
be large enough. On the other hand, if you also need to power other devices (such as linear power amplifier), then you¹ll need to go
bigger or
use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% (approx.) duty cycle.. Great for CW or SSB. However for any full duty cycle mode such as WSJT, FM? etc, then you need to derate the power
supply
so it¹s capabilities are not exceeded. Switch-mode Power Supplies (switching supplies or 'switchers¹) are
smaller
and lighter weight with the trade-off that they generate electrical
noise
(because of how they regulate the output level) and inherently are
noisy.
Linear supplies are bigger and heavier (and less power-efficient) but
for
those trades, one gets absolute electrical quiet performance because
they
don¹t hot-switch power signals away from a zero-crossing. If you
wish to
see an animated Œhow switching power supplies work¹ video (approx. 14 minutes), here¹s one I share when explaining this concept. https://www.youtube.com/watch?v=vwJYIorz_Aw
Very 73,
Dave KJ9I
On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" <[email protected] on behalf of [email protected]> wrote:
I have used Astron power supplies for years. Pick the appropriate current rating.
Frank K6FW
On Feb 10, 2019, at 7:15 AM, Bob Hammond [email protected]
wrote:
I'm ready to order mine along with a power supply. Any suggestions
on
PS?
Bob W7OTJ
On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer [email protected]
wrote:
> FYI - When I ordered mine from DXEngineering (due to the
reservation I
> placed), they said if the price drops from the $2098 before it
ships,
> it > will sell for the lower price. That also do not charge one¹s credit > card > until it ships. > > Tom NY4I > >> On Feb 9, 2019, at 9:44 PM, radiomb [email protected]
wrote:
>> >> Just purchased a IC9700 today at Hamcation. It was great to see
one
>> in > person. I got it for $1995. Icom said all back orders should be
filled
> by > end of April. They said they should have enough in stock so that
anyone
> that wants one at Dayton can get it. I was happy to get it for
$1995.
> No > tax or shipping. >> _______________________________________________ >> Sent via [email protected]. AMSAT-NA makes this open forum
available
>> to all interested persons worldwide without requiring membership. > Opinions expressed >> are solely those of the author, and do not reflect the official
views
>> of > AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite > program! >> Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum
available
> to all interested persons worldwide without requiring membership. > Opinions > expressed > are solely those of the author, and do not reflect the official
views
> of > AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite > program! > Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
> _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum
available
to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official
views
of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
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views of
AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings:
http://www.amsat.org/mailman/listinfo/amsat-bb
Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership.
Opinions expressed
are solely those of the author, and do not reflect the official views
of AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
program!
Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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AMSAT-NA.
Not an AMSAT-NA member? Join now to support the amateur satellite
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Looking forward to the IC 9700- I just put my CC in after having a reservation at DXE for nearly two years!
Going to use a 70Ah AGM to run mine. It is charged with an Icom 126 PS via a West Mtn Radio Epic PwrGate. It is very quiet, but if it does become a problem, I can just turn it off temporarily.
I do have a 35amp Pyramid linear supply which is very RF quiet, but weighs a ton and takes a lot of valuable space in my shack. So it’s for sale.
Dan
Sent from here. NM3A
On Feb 10, 2019, at 13:53, Paul Stoetzer [email protected] wrote:
My RS-35M has served me well for nearly 19 years, so I'll add to that recommendation.
73,
Paul, N8HM
On Sun, Feb 10, 2019 at 1:28 PM Jim Sanford [email protected] wrote:
I have several RS35Ms and they have been trouble-free.
AFter an ARRL review several years back, I tried an SS-30. (The Astrons were significantly quieter than anything else that they tested.) No RF noise that I could detect. That said, I have not put a scope on the DC lines, but will when I get a chance.
I have bought several more SS-30s and had no noise problem with them. So, for Field Day and PA QSO Party, I carry a switcher. (Weight!!)
Good luck & very 73,
Jim
On 2/10/2019 1:16 PM, Bob Hammond wrote: Thanks! Astron it is.
Bob W7OTJ
On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker [email protected] wrote:
Bob: I echo Frank¹s good input. I would append this with recommendation to use a linear (not switching) Astron Power supply because they¹re electrically quiet. If your P/S needs to power the radio only, an Astron RS-35M would be large enough. On the other hand, if you also need to power other devices (such as linear power amplifier), then you¹ll need to go bigger or use multiple RS-35Ms, etc. Remember the ratings on these P/Ss are Intermittent Carrier as used in Amateur Service (ICAS) meaning 50% (approx.) duty cycle.. Great for CW or SSB. However for any full duty cycle mode such as WSJT, FM? etc, then you need to derate the power supply so it¹s capabilities are not exceeded. Switch-mode Power Supplies (switching supplies or 'switchers¹) are smaller and lighter weight with the trade-off that they generate electrical noise (because of how they regulate the output level) and inherently are noisy. Linear supplies are bigger and heavier (and less power-efficient) but for those trades, one gets absolute electrical quiet performance because they don¹t hot-switch power signals away from a zero-crossing. If you wish to see an animated Œhow switching power supplies work¹ video (approx. 14 minutes), here¹s one I share when explaining this concept. https://www.youtube.com/watch?v=vwJYIorz_Aw
Very 73,
Dave KJ9I
On 2/10/19, 10:32 AM, "AMSAT-BB on behalf of Frank" <[email protected] on behalf of [email protected]> wrote:
I have used Astron power supplies for years. Pick the appropriate current rating.
Frank K6FW
On Feb 10, 2019, at 7:15 AM, Bob Hammond [email protected] wrote:
I'm ready to order mine along with a power supply. Any suggestions on PS?
Bob W7OTJ
> On Sat, Feb 9, 2019 at 8:21 PM Thomas Schaefer [email protected] wrote: > > FYI - When I ordered mine from DXEngineering (due to the reservation I > placed), they said if the price drops from the $2098 before it ships, > it > will sell for the lower price. That also do not charge one¹s credit > card > until it ships. > > Tom NY4I > >> On Feb 9, 2019, at 9:44 PM, radiomb [email protected] wrote: >> >> Just purchased a IC9700 today at Hamcation. It was great to see one >> in > person. I got it for $1995. Icom said all back orders should be filled > by > end of April. They said they should have enough in stock so that anyone > that wants one at Dayton can get it. I was happy to get it for $1995. > No > tax or shipping. >> _______________________________________________ >> Sent via [email protected]. AMSAT-NA makes this open forum available >> to all interested persons worldwide without requiring membership. > Opinions expressed >> are solely those of the author, and do not reflect the official views >> of > AMSAT-NA. >> Not an AMSAT-NA member? Join now to support the amateur satellite > program! >> Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > _______________________________________________ > Sent via [email protected]. AMSAT-NA makes this open forum available > to all interested persons worldwide without requiring membership. > Opinions > expressed > are solely those of the author, and do not reflect the official views > of > AMSAT-NA. > Not an AMSAT-NA member? Join now to support the amateur satellite > program! > Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb > _______________________________________________ Sent via [email protected]. AMSAT-NA makes this open forum available to all interested persons worldwide without requiring membership. Opinions expressed are solely those of the author, and do not reflect the official views of AMSAT-NA. Not an AMSAT-NA member? Join now to support the amateur satellite program! Subscription settings: http://www.amsat.org/mailman/listinfo/amsat-bb
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Hi!
I've had Astron switching power supplies for many years. If they give off any RF noise/interference, I don't see it on ham bands. They are quiet. I also have a Powerwerx SS-30DV switching power supply for operating away from home. The Powerwerx unit is small, and also has been quiet when used with my ham gear. The only thing you have to do with the Powerwerx units is to make sure the AC voltage is properly set on the back - they are normally set for 220V out of the box.
73!
Patrick WD9EWK/VA7EWK http://www.wd9ewk.net/ Twitter: @WD9EWK or http://twitter.com/WD9EWK
On Sun, Feb 10, 2019 at 6:29 PM Jim Sanford [email protected] wrote:
I have several RS35Ms and they have been trouble-free.
AFter an ARRL review several years back, I tried an SS-30. (The Astrons were significantly quieter than anything else that they tested.) No RF noise that I could detect. That said, I have not put a scope on the DC lines, but will when I get a chance.
I have bought several more SS-30s and had no noise problem with them. So, for Field Day and PA QSO Party, I carry a switcher. (Weight!!)
Good luck & very 73,
Jim
participants (6)
-
Bob Hammond -
Jim Sanford -
Mail -
Patrick STODDARD (WD9EWK/VA7EWK) -
Paul Stoetzer -
Rolf Krogstad