Sorry for the mis-directed email.
From: [email protected] [email protected] Sent: Monday, May 24, 2021 12:29 To: 'John Brier' [email protected] Subject: RE: [AMSAT-BB] Re: Power to send data to a cubesat
Kais,
This is a follow up to your note – does not address the power required question, but does address the symptom you describe for your IC-9100.
This is a common issue with most newer ICOM radios which have “automotive” AT (large blade style) fuses in the stock power cable. Apparently the fuse and fuse holder contacts become oxidized and develop quite a significant amount of resistance.
Before doing anything more aggressive, try removing the fuses from the holder so you can clean the fuse blades and the holder contacts, then reseat the fuses. If the problem goes away, you have the solution. To prevent it in the future, use some “contact” dressing on the blades. I have found that applying a very small amount of “Jet Lube SS-30” or “Sanchem NO-OX-ID A-Special” seems to prevent the problem from recurring.
Jack Spitznagel – KD4IZ
Assistant Editor – AMSAT News Service
[email protected] mailto:[email protected]
From: John Brier <[email protected] mailto:[email protected] > Sent: Sunday, May 23, 2021 21:17 To: belwafi kais <[email protected] mailto:[email protected] > Cc: AMSAT BB <[email protected] mailto:[email protected] > Subject: [AMSAT-BB] Re: Power to send data to a cubesat
If the Icom restarts when you increase the power the power supply might not be providing enough current, or there could be a connection problem with the power cables.
Radios can also restart due to high SWR. It is a protection circuit. If that was the issue though I would think it would happen at lower power levels too, though.
73, John Brier KG4AKV
On Sun, May 23, 2021, 13:54 belwafi kais <[email protected] mailto:[email protected] > wrote:
Hello,
Please what is the minimum power that i should use to send data for cubesat. 20w is it sufficient?
When i increase the power in the icom 9100, the icom restart once i exceed approximately 35w. What is the problem.
Thank you.
Best regards
Kais
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