Does anyone know anything about this veglia borletti speedometer?

Simple calibration to the dial is a given but doesn't make them non-interchangeable. I feared you had some knowledge about it's inability to work with all cars by virtue of a real physical or electrical difference.

 

Got it all,, RCA FET, but, it is just a MPH speedo unit. ( not a kPH)


it is for sale, and not $ 400.00
,, pM me.

Edwardo
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Paul,

They are NOT drop right in interchangable. YES, some type of calibration is required. "Simple?" Don't know. NOT "simple" to me. If sensors also need to be changed out in some MODS I would not doubt it and suspect so, but do not know for sure.


I used Palo Alto Speedo for all my conversions (85 to 180 refaced) and they all worked VERY well. I told them EXACTLY what I wanted to include ODO reading to match the one I was removing so the new "Tale of the Tape" (with newspaper in photo for day/date) was seamless.


In fairness they were VERY, VERY SLOW, rather pricey (I thought so) and in the end, WELL worth it.

 

Not at all Paul, my point is it may take some time for the right buyer, who will pay the price he wants for it to sell (I did not say is not going to happen, just not desirable to as many people). I just don't think it will immediately sell at the price he is asking. But as I said, he can prove us all wrong with his auction. It has obviously lost it's appeal to you at $400, and become less desirable....no?

I'm sure if he was giving it away for free, 100's of people would find it desirable as a momento.

 

Well, his auction ended with a starting bid price of $299. No takers, so perhaps he should have taken the $200 from "Paul 308" and moved on. Or, he can keep listing and see if someone eventually offers him more...but the listing fees, Ebay fees and PayPal fees may end negating any additional money he gets over Paul's original offer.

 

FWIW....it's a SHE, not a he. Can't fault her for taking a shot at an extra few hundred. Without knowing the market why leave money on the table. I would expect a relist and am eager to see the new target price. The old one had a $400 reserve and feel she'd been better off to start at $0.10 just to get anyone in.

 

I have a source for obsolete chips. If you contact me I will check my source. Just give me all the info you can on the chip. This is usually a date code and a chip model# that is stamped on the top of the chip or you might find a refrence number on the circuit board.

 

OK, 8 Pin Mount, RCA 349, 92967

For the mPH unit.
Thanks,
Edwardo

 

What is it that goes wrong with these? I did a fair bit of electrical engineering in my time; all this circuit board does is convert a frequency to a current (or voltage, if you will), and likely holds a frequency divider for the odometer (that's probably what the chip is for). There are capacitors on that board as well as what looks like a zener, that might cause issues.

Even if it's the chip and the thing is non-fixable, it should be quite easy to engineer a replacement circuit board, even if the chip in question is NLA. Then you have a new and future-proof solution, probably for a better price than $200.

 

These guys say they have 373 in stock. I would prolly doubt that, but they can get some.

http://www.1sourcecomponents.com/partinfo/92967.htm

 

Mark,

When I bought my 1981 GTSi in 1989 I had the dealer put in a 180 mph speedo before I picked up the car. At that time a new 180 was available for $350. I remember nothing being said to me about any difficulty in the swap. When I asked for them to do it they acted like it was just an easy replacement. I will have to look at the original invoice to see if there was any special charge for the installation.

I always assumed (dangerous) that the sweep of the hand would be the same, but there where no numbers where the big ones should be. Why go through the problem of building two different units, one for the USA, when you could just make a different face plate?

 

I agree with you and we are all hard pressed for hard data, even sufficient anecdotal data to the contrary. Mark has made the non-interchangeable comment several times without a hint of why, and while my mind is open, for now the logic is with you. The board has a potentiometer for final calibration which allows for mating the pulse input to the full scale deflection of various faceplates. I got more interested in the circuit when I got the great calibration device from 12'oclock.com and and decided to get a unit to play with which wouldn't endanger my car's speedo ... to build a sensor ... and generally get a better understanding. It certainly would be nice to have a peek at the Veglia service information.

Over the dozen years I've been paying attention, several quys with bad speedos expressed their units were repaired with a simple change of the IC. Failure of the zener or capacitor makes the IC input vulnerable and very possible those were bad and changed with the IC and that fact not conveyed. Nowdays we expect anything silicon to last forever but these chips were designed in the infancy when they were still laid out by hand and wafers, exposed with film and were cut from 1" dia impure pulls and bad dies often not culled out. There are newer similar ICs but none yet retro-designed into the 308 as a niche industry.

 

I've done some analog chip design and I totally second that silicon does not last forever - far from it, in fact. Environment is a factor, but the heat during it's life and the purity of the materials used in the manufacturing process are the biggest influencers of life expectancy. Ask Commodore with their 64 or Microsoft with their Xbox360 issues about how big that can get.
If chips are seen to fail, it might just have been a bad batch but it can also be that the Bell curve is moving in. In the latter case it's best to redesign with modern equivalents rather than to scavenge old electronics for parts that are already pretty far advanced on that curve. I guess the market for this is very small and the amount of hours needed to design and test something new may not weigh against the benefits at this time.

 

Has anyone found a source for chips for their speedos please?