[amsat-bb] Re: Dayton
Richard John K7MDH
K7MDH at arrl.net
Mon May 23 08:21:19 PDT 2011
Thank you very much for the first clear explanation on HO-68 that I have
heard. It was my favorite bird, and while it is sad to learn the chance of
recovery is low, it is good to know what's really going on.
> ----- Original Message -----
> From: "Stephen E. Belter" <seb at wintek.com>
> To: <amsat-bb at amsat.org>
> Cc: "Richard John K7MDH" <K7MDH at arrl.net>
> Sent: Monday, May 23, 2011 8:00 AM
> Subject: RE: [amsat-bb] Re: Dayton
>>> did CAMSAT have anything realistic to say about HO-68 ?
>> Yes, Alan Kung, BA1DU and CEO of CAMSAT was one of the speakers at the
>> AMSAT Forum. He reported that HO-68 is suffering from a bad relay or
>> relay driver that is used to switch from the beacon to the transponder.
>> The likelihood of recovery is low, but not zero. As my schedule permits,
>> I plan to post Alan's very informative presentation on the AMSAT web
>> site. Watch for an announcement from ANS (the AMSAT News Service).
>> Here is the explanation from Alan's slide. Since I have a copy of his
>> presentation, these are exact quotes, not my interpretation:
>> -- The current situation is the transponders will be difficult to switch
>> the RF PA from beacon mode to transponder mode
>> -- The RF relay or its drive circuit is failing, it is a stick relay.
>> Probability of success of switch is probably a few tenth
>> -- On the other hand, up to now the both solar and lithium-ion batteries
>> are in very nice condition
>> -- The exhibitions of the thermal-control, onboard flight computer and
>> TT&C are also excellent.
>>> any new satellite radios announced by anyone ?
>> None that I saw or heard about.
>>> I'll settle for ANY new radios announced by anyone ?
>> Elecraft showed their KX3. I'll have to let others give you the details.
>> 73, Steve N9IP
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