[Roadsters] Alternative to Bimetallic Strip Gauge Regulator?

[RWM]

It's solid state.  If needed, a dropping resistor could be used.

I'll let you know.



On 3/29/2012 10:26 AM, Linda Jordan wrote:
> 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