[1000mp] (no subject)

[wa9mxq at att.net]

Ed,

The Protect Circuit on the FL-7000 is very aggrivating. But, Yaesu released an update with modifications to eliminate most of the problems. Try doing a search for "FL-7000" on your favorite web browser and you should find it posted somewhere -- perhaps on <www.mods.dk> for one place.

Also note that the FL-7000 works fine with a higher power driver by using the attenuator pad that can be switched from the rear panel of the amplifier. I believe that the manual notes the use of the amplifier with an FT-1000/D at a full 200 watts output. That is kind of overkill but before I did the protection circuitry modification on my own FL-7000 (now gone), I ran my Mark V at 200 watts output with the pad and it worked fairly well. But, in the end, the modification is the real answer. After that, I ran less than 100 watts into the amplifier and had no problems.

73,

-Bill, WA9MXQ



-------------- Original message from "Ed McNamee" <gopone at ptd.net>: -------------- 


> Any one having a problem with spikes from the Mark V. 
> 
> Blew two sets of Transistors on PS Unit of a FL-7000. 
> 
> Input from Mark V to Amp was less than 75 watts. First push of the PTT and the 
> Protect circuit kicked in. 
> 
> W3EJM 
> 
> ED 
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