[Heathkit] Heathkit AT-1 Meter

[Mark K3MSB]

Hi Lee

>>NEVER put a magnet near a meter!!!

OK Lee - got it!

I removed the meter face.  I can see nothing broken, busted etc.

Blowing on the innards to get rid of debris had no effect.

A dab of isopropyl alcohol or WD-40 on the pivot point?

Mark K3MSB
On Jun 28, 2016 9:28 PM, "Lee" <L at w0vt.us> wrote:

> NEVER put a magnet near a meter!!!  You could have permanently hurt
> calibration.  That said, you could have debris in the meter movement.  You
> also could have a tight bearing at it's pivot points.
>
> Lee, w0vt
>
>
> On 6/28/2016 8:22 PM, Mark K3MSB wrote:
>
>> I'm finishing up a Heathkit AT-1 transmitter.
>>
>> The meter tested good; I get full scale deflection at 10 mA, and a
>> measured
>> resistance of about 220 ohms.
>>
>> I tested the radio for the first time tonight and the meter acted
>> normally.
>>
>> Somewhere along the line, the meter decided to stay about "high noon" even
>> when power is off. The meter still tests good, and reacts as it should
>> during tuneup.
>>
>> I removed the meter from the radio, and put a magnet near the meter and I
>> can get the meter to go to zero, but it returns to "high noon" when I
>> remove the magnet.
>>
>> Ideas? Some kind of residual magnetism?
>>
>> 73 Mark K3MSB
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>
>