>> I'm looking for some way to put a current surge protector in my 240 v. line
>> to my amp. I see that the MFJ catalog copy for their Inrush Current
>> Protector (model ICP-240) says that it also protects against line surges.
>> Does anyone have any experience with this unit? Does it really do the job?
>> I wanted to try to get some comments from owners before I spend $79 on one.
>
>Hello Rob,
>The MFJ does the job just fine.
>Pros: Can be used over and over, on present and future amps.
> Requires no mods to your equipment.
>
>Cons: You have to leave the mains switch on all the time, and reach
> over to the MFJ unit to power up the amp.
> There are about $30 worth of parts in this box; a relay, a
> resistor, a switch, and a couple of other parts.
** to add a step-start in my 922, I spent c. $3 for two, 20-ohm ww
resistors. The step-start relay was the old T/R relay that was left over
from the high-speed switching mod.
>
>If you have room in your amp, this circuit can be duplicated,
>and the regular mains switch will operate it.
>
>Just a couple of examples of inrush current.....
>The Dentron MLA2500/2500B has total inrush current of
>up to 140 amps, 53 of which are on those rare 8875 heaters!
>(Denny used very large wire on the secondary of the filament
>winding)
>
>The Drake L-4B has total inrush of up to 120 amps......
>
** The all-time record is 400A fil inrush for a Henry Radio 4K-2
amplifier.
>Two prime candidates for the MFJ, or internal mod.
>
>(((73)))
>Phil, K5PC
- Rich..., 805.386.3734, www.vcnet.com/measures.
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