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ZL2TZE > MIR 31.05.99 05:36l 46 Lines 1887 Bytes #-9816 (0) @ WW
BID : 10936-ZL2TZE
Read: GUEST OE7FMI
Subj: [sarex] Re: Why is SSTV STILL on 2 mtrs?
Path: DB0AAB<DB0ZKA<DB0ABH<DB0BOX<DB0MAK<OK0PKL<OK0PPR<OK0PPL<OK0POK<OK0PAB<
HA5OB<WU3V<WB0TAX<VK3BBS<VK7AX<N8ZFM<ZL2TZE
Sent: 990530/0750Z @:ZL2TZE.#73.MLB.NZL.OC #:10936 $:10936-ZL2TZE
From: ZL2TZE@ZL2TZE.#73.MLB.NZL.OC
To : MIR@WW
The MAREX-NA SSTV project is still on two meter for two reasons.
#1. The club which was going to deliver the power supplies for the MAREX-NA
SSTV project, back out at the last minute and refused to deliver
the already Mir-flight qualified power supplies (Too bad politics has to ruin
good projects).
MAREX-NA has looked into several possible supply options. We can not use off
the shelf Mil-Spec power supplies for space flight inside the ISS or Mir.
MAREX-NA has found a source of ISS and Mir Flight qualified power supplies from
a commercial source.
Power supplies are too critical to rely on non-professional development. The
commercial supplies we located will not be affected by politics,
but unfortunately are very expensive, over $10,000-20,000 each
(with all flight safety approvals from both governments included).
Until we have a reliable supply on board Mir for the Amateur Radio station,
there is no reason to use the other channel. The 70 cm channel
was only for running both projects simultaneously.
#2. The SSTV project is still located in the Priorida module, There is no
mounting space available in the Mir-base block module for the SSTV project.
(The physical location of the MAREX-NA project was confirmed today in a
conversation with the Mir crew currently on Mir).
Since the hardware is in the Priorida module, we only have access to the 2-meter
auxiliary antenna port.
We do not have access to any other band from the Prioida module, JUST 2-METERS.
Even if we had access to 70 CM, there is no reason to use 70CM. The 70cm
channel is only going to be used when we have the ability to run both
projects simultaneously (and if get can get access to the dual band
antenna).
The SSTV System will stay on 2-meters until both problems are resolved!
Miles WF1F
MAREX-NA
We keep space free to the public.
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