[Heathkit] SB-220 meter question

[Mark K3MSB]

I quickly threw this together from my notes;  nothing fancy.....

http://www.k3msb.com/temp/HM2102 Meter in SB220.jpg

73 Mark K3MSB

On Wed, Aug 17, 2016 at 8:33 AM, Thomas Chesek <tchesek at ptd.net> wrote:

> As per the 1984 Master Parts List:
>
> SB-220 meters
> 407-146  200 ua  1400 Ohms DC
> 407-147  150 Volts AC Ext Mag (external magnetics - for whatever that
> means)
>
> SB-200 meter
> 407-103  200 ua  1400 Ohms DC
>
> HM-102 meter
> 407-155  1000 ua  1000 Ohms DC
>
> HM-2102 meter
> 407-179  1000 ua  1000 Ohms DC
>
> Tom K3TVC
>
> -----Original Message-----
> From: Heathkit [mailto:heathkit-bounces at mailman.qth.net] On Behalf Of
> jack m
> Sent: Wednesday, August 17, 2016 00:37
> To: heathkit at mailman.qth.net
> Subject: Re: [Heathkit] SB-220 meter question
>
> Just wondering - the meters in the HM-102 and HM-2102 RF output/SWR meters
> are physically the same size as the SB-200 and SB-220.  What are the
> electrical characteristics of the HM meter movements?
>
> If they are the same as the SB linear movements, it certainly is easy to
> change the faces of these to replace a broken or damaged SB 200/220 meter -
> and definitely lots cheaper based upon the prices I see for complete used
> HM's versus just the used meters for the SB linears!
>
> If I recall, correctly, from  an earlier thread on one of the reflectors,
> all the small SB equipment meters differ only by the face, and all meter
> movements read full scale with 1 ma current.  I have changed faces on
> several of these with great success.
>
> Jack  W3RU
>
>
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