[amsat-bb] Re: Mirage preamps

Jari Koivurinne jari.koivurinne at aina.net
Wed Aug 10 00:36:14 PDT 2011

>> There is also another possible issue to consider in that the 847 when
>> first powered up sends a full power transmit for a very short time.

As does all those 800-series YAESUs... 8-(
Very bad ALC-circuit. Some of them having longer delay --> longer
pulse out.

> Could be this is the missing link explaining why i burn  2 preamp  in the
> past? but i always put the power knob at minimum when i turned
> off the 847. I will have to test it as i measure about 5W even if the RF power
> is set to 0!! Full power i'm not sure but even 5W is enough
> to kill a preamp
> Luc Leblanc VE2DWE

-jari oh3uw

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