[ForSale-Swap] Re: Heathkit IM-4180 FM deviation meter

[Harold Smith]

Dick:

If you replace the meter and shorten the needle, most d'arsonval meters have 
3 balance points. They are behind the pointer.
They are there to keep the meter on zero no matter what position. they slide 
back and forth and look like
tiny coiled springs.
I would not cut the needle.
Yes balance will affect the accuracy.

73 Price WØRI





Subject: [ForSale-Swap] Re: Heathkit IM-4180 FM deviation meter


> Well guys, it cannot be fixed. I got the bad news today from Eldad. The 
> analog meter movement is not just sick, it is dead. The armature winding 
> is open. I am now in need of a replacement movement. It has been 
> determined that it is a 200ua DC movement and is commonly used in other 
> Heathkit test meters. I have a pic of the original which I can send if 
> anyone needs it.
>
> If anyone has a movement that they wish to sell and has been tested ok, 
> please let me know. First I will try to use the same meter housing and 
> will just replace the movement if possible before I consider one that 
> requires a custom designed face to put in a complete meter made for other 
> equipment.
>
> I know that the needle should be the same length as the original but I am 
> willing to trim one that is too long even though it will affect accuracy 
> because the weight of the needle is part of the design. Just a little 
> trimming should not affect the the accuracy too severely.
>
> 73, Dick KF4NS
> St Petersburg, FL 33714 USA
> Keep The Glow!
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