[Roadsters] Alternative to Bimetallic Strip Gauge Regulator?

[Linda Jordan]

Didn't someone say it was solid state, so can't adjust?

Linda

Sent from my iPod

On Mar 29, 2012, at 7:01 AM, Pat Horne <pat at hornesystemstx.com> wrote:

> The voltage drop across a resistor is dependent on the current flowing
through it. The current in this particular circuit does not stay constant, so
just dropping the voltage would not work. As I recall the average voltage
coming out of the instrument regulator is about 8V. The gauges are slow enough
to react that a constant voltage will be good enough.
>
> The reason for having a voltage regulator at all is that the battery voltage
can vary quite a bit between idle and full throttle, not to mention
head/driving lights on or off, causing the gauges to read off by quite a
bit....not that the temperature gauge is known for being particularly
accurate!
>
> As for the 10V Moss regulator, if it is a bi-metal regulator, it can be
adjusted to work. If it doesn't have an adjustment on it, the mount for the
bi-metal strip or the strip itself can be bent to have more off time.
>
> Peace,
> Pat
>
> Thusly spake Hall, Phillip B. (MSFC-EE11), On 3/28/2012 7:46 PM:
>> Can you not just use a small 2 V resister on the output?
>>
>>
>> On 3/28/12 7:44 PM, "RWM"<RWM at RWMann.com>  wrote:
>>
>>> Now that you mention it, Charlie, I recall that.
>>>
>>> I'm betting there is ~2V of additional voltage drop in a 40-year old
>>> electrical harness and connectors...
>>>
>>> - Bob
>>>
>>>
>>> On 3/28/2012 7:26 PM, Ken.Smart at csiro.au wrote:
>>>> For reference.
>>>>
>>>> Those with long memories may recall Tom Walter's solid state voltage
>>>> regulator. I built one many years ago based on his specs.
>>>>
>>>> A quick read of the Moss Motors PDF indicates that it drops the voltage
to
>>>> 10v
>>>> (unless I missed something )
>>>>
>>>>
>>>>
>>>>
>>>> -----Original Message-----
>>>> From: datsun-roadsters-bounces at autox.team.net
>>>> [mailto:datsun-roadsters-bounces at autox.team.net] On Behalf Of Roy
Haslett
>>>> Sent: Thursday, 29 March 2012 7:14 AM
>>>> To: Walter.Peterson; 'RWM'; 'Datsun Roadster List'
>>>> Subject: Re: [Roadsters] Alternative to Bimetallic Strip Gauge
Regulator?
>>>>
>>>>       Thanks for the great info everyone, my fuel and temp gauges have
>> been
>>>> indicating a little low.  This part should do the trick.
>>>> Roy
>>>> 67 low 1600
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>> s
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>>
>
> --
> Pat Horne, Owner, Horne Systems
> (512) 797-7501 Voice        5026 FM 2001
> Pat at HorneSystemsTx.com    Lockhart, TX 78644-4443
> www.hornesystemstx.com
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