[amsat-bb] IC9700 Update

[Bob Hammond]

Thanks!  Astron it is.

Bob W7OTJ

On Sun, Feb 10, 2019 at 8:56 AM David J. Schmocker <kj9idave at charter.net>
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"
> <amsat-bb-bounces at amsat.org on behalf of K6FW1 at verizon.net> 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 <propgrinder at gmail.com> 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 <ny4i at ny4i.com> 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 <radiomb at bellsouth.net> 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 AMSAT-BB at amsat.org. 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 AMSAT-BB at amsat.org. 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 AMSAT-BB at amsat.org. 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 AMSAT-BB at amsat.org. 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
>
>
>