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Alan,
I'm not really looking for new guages but your post reminded me of one of those details I wanted to add to my Speedster.
The guages you have for sale include a gas guage. It looks similar to a VW type 1 (at least the face is familiar).
Always looking at improvements, here's my question:
Does the Porsche gas guage use a vibrator (like VW's)?
I've never been happy with the fuel guage setup that Vintage supplies with the 8 gal. tank. I don't think the sender was meant to work with the tank Vintage uses. I really had to tweek the sender float arm length to get mine to at least let me know when I'm getting near "E".

Thanks,
Greg B
I was told that the vibrator kind of evens out the tank reading. The side to side/front to back sloshing in the tank would make a float-style sender fluctuate. The vibrator keeps the gauge needle steady somehow.

The tube-style senders are less twitchy, they dont move up and down as quickly and don't need the vibrator.

I'm not being clear, am I? I hope that you kind of get the idea though. The after market gauges probably don't need it as they often come with their own calibrated sender.

TC
Vibrators are basically a turn signal flasher type thing. When the contacts are closed current goes through them and when they open...well it don't. What this does is effectivly divide the voltage input to the gauge by 2. If you have 12 V in and the contacts are closed 50% of the time you get (more or less) 6 out. This would make the gauge jump all over the place with first volts and the none (on and ocilloscope it would look like a square wave), but the gauges are damped, or slow to respond, so you don't see the voltage variation in the instrument. As for use with aftermarket instruments, I'd best guess it at probably not.
HTH... Bill
Bill
The damping should, among other things, eliminate the vibrating needle syndrome it would exhibit if the ignition were on, the car stationary, and no(or little) damping. If the needle weren't damped and could make noise it would sort of hum. If you're seeing excessive needle movement while driving, it may be the gauge isn't damped enough to compensate for the fuel sloshing while driving. At least in theory.
Bill: that must be how those old vibrators work in early, tube-type radios, only they converted DC to a square-wave AC so they could more easily boost the voltage for the tube plates and screens. Even though they mounted them in rubber after a while, they STILL made a lot of noise! And then there were those 400 cycle (hz) converters on airplanes...if the physical noise didn't get to you, the whine in every RF and audio circuit on the plane did!
gn
Gordon....Yup. had one in a radio in a '55 Ford that would stick and no tunes - a priority for teenagers. Found that a well placed foot to the radio would unstick the contacts and we were rock and rollin again. The one on inatruments for Fords and Triumphs look like a vastly scaled down version (little bitty) and I believe they still have (had) a bimetallic strip to make and break the citcuit. I'd suspect that solid state devices would be more reliable and a more constant voltage - haven't had occasion to get into one ... yet... to see whats up.

S O L D !

I have a used 4 pc. 356 gauge set available:

Speedo: Rezeroed and bench tested to 3 miles. Trip feature works.One of the two thumb screws for the mounting bracket is missing Chrome bezel ring is slightly tarnished but may clean up.

Tach: VG conditon missing mounting bracket (easy to make one up)

Oil/Fuel gauge: VG condition

Clock : In VG condition

I decided to go with a new set from Vintage .
Since I purchased them from another SOC member, I'll assume that they are all in working order. $200
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