[amsat-bb] IC9700 Update

Sun Feb 10 20:20:52 UTC 2019

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 <n8hm at arrl.net> 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 <wb4gcs at wb4gcs.org> 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
>> 
>> wb4gcs at amsat.org
>> 
>>> 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 <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.
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