Originally posted on Dave Mac’s Window on the World: In an amongst the guitar building I decided to break out the soldering iron to build an …
A DIY valve overdrive pedal
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DIY valve overdrive pedal
Tag: analog electronics
Paul Newman-owned Rolex Daytona
written by: Simon de Burton
No watch at auction has ever created as much media hype as a scuffed up 1968 Rolex Daytona, given as a gift to Hollywood icon Paul Newman by his wife, which achieved a world record price of $17.75 million in 2017.
Arguably, that sale also triggered the frenzy of demand for Rolex watches that has transformed the entire watch market ever since.
With power like that, it is little wonder that a second Rolex Daytona, once owned by Paul Newman, is likely to set the auction world alight when the watch goes across the block at Sotheby’s in December.
Unlike the $17m Daytona, the Rolex in question is not one that Mr Newman is known to have worn regularly, and was given away as a gift to a fellow racing enthusiast, Hollywood daredevil and stuntman who doubled for the actor in several movies, leading to them becoming close friends.Stan Barrett with Paul Newman enjoy stock car racing together.
The daredevil in question is Stan Barrett, whose adrenaline-seeking led him to attempt to become the first person to break the speed of sound on land in 1979, travelling at more than 700 mph in the Budweiser Rocket Car.
WATCHPRO columnist Simon de Burton picks up the story of Mr Newman and his double Mr Barrett, and finds out why a pair of steel Rolex watches worn during the Rocket Car attempt could realize more than $600,000 when they cross the block at Sotheby’s in December.
During the final run at Edwards Air Force Base in California on 17 December 1979, Stan Barrett wore the Cosmograph Daytona and GMT-Master.Stan Barrett wearing both the Rolex and GMT Master on one wrist. (picture courtesy Courtesy of Stan Barrett and RolexMagazine.com)
Afterwards, he was presented with a gold GMT-Master by August Busch, CEO of Anheuser-Busch, the main sponsor of the Budweiser Rocket Car and ‘Project Speed of Sound’.
That watch will also be auctioned and could realize $100,000, with a percentage of the money from the sale of all three pieces going to a Ukraine children’s charity that Mr Barrett has supported since 1987.This golden Rolex Reference 1675 GMT-Master was given to Stan Barrett by August Busch, CEO of Anheuser-Busch, the main sponsor of the Budweiser Rocket Car.
But the estimates for the two steel watches could prove conservative – because both were given to Mr Barrett by Hollywood idol Paul Newman, his best friend of 40 years and the godfather to his sons: NASCAR racing driver Stanton and television producer David.
As is well known, a Rolex Daytona gifted to Mr Newman by wife Joanne Woodward remains the most expensive wrist watch ever auctioned following its sale for $17.7m at Phillips New York five years ago. As a result, any Rolex with a connection to the Hollywood legend is now deemed ultra-valuable – and the latest two to come to market should be no exception.
Although 18 years Mr Newman’s junior, Mr Barrett formed a close relationship with the star after working as his main stuntman on numerous films, starting with Sometimes a Great Notion in 1971. Barrett was particularly well suited to the job due to his remarkable resemblance to Newman.This Rolex Reference 1675 GMT-Master Pepsi was on Stan Barrett’s wrist during the Rocket Car attempt.
Speaking by telephone from his Bellevue, Idaho, home in an exclusive interview for WATCHPRO, Mr Barrett said that Mr Newman had given him the Daytona watch immediately on hearing about the proposed record attempt. “We were at his home in Connecticut and he just went upstairs and came down with the Daytona. He could be very funny about me having the right watch to wear, and was always extremely generous.
“About four years earlier, after he had given me the GMT-Master, I bought the same model for my father – but it got stolen. The next thing we know, my father receives a replacement from Paul in the mail.”
Insatiable horophile Mr Newman gifted several watches to Mr Barrett throughout the friendship, including a Breitling Navitimer. “That time I had arrived at his house without a watch on,” recalls Mr Barrett. “Again, he went upstairs, and came down with this Breitling – and when he handed it over to me he said ‘Stan, be careful where you wear it. It was a present from Bruce Willis’.”
But it is the Rolex GMT-Master and Cosmograph Daytona now up for sale that are more interesting – not least since the former is tipped to realize $50,000-100,000, while the latter could achieve as much as $500,000.Stan Barrett wore this Rolex Reference 6262 Stan Barrett’s Rolex Daytona is expected to sell for up to $500,000.
While Mr Newman was photographed trying the Budweiser Rocket Car for size during practice sessions at Bonneville Salt Flats earlier in the year, he refused to watch the run proper.
“Paul called me after the Bonneville runs – during one of which the car’s canopy blew off at 600 mph – and he said ‘Stan, look, I want to support you, but everyone says you aren’t going to make it. And I don’t want to watch you die’,” recalls Mr Barrett.
To keep Mr Newman by his side in spirit, Mr Barrett strapped both gifted watches to his left wrist – and that is where they remained while he drove the rocket car to an unofficial 739.66 mph; a speed that, if accurate, would have made him the first person to break the sound barrier on land.The Budweiser Rocket Car unofficially broke the world land speed record. (Picture courtesy of Department of Defense photo by MSGT Paul J. Harrington)
But the record remains disputed due to the radar scanner being faulty, the fact that Mr Barrett only completed one run and because no one heard the tell-tale sonic boom that usually accompanies the sound barrier being broken.
All the same, no one else came close to the 700 mph mark for another 18 years until Andy Green drove Thrust SSC to 713.990 mph at Black Rock desert in September 1997, and then to 760.343 mph the following month.
Sotheby’s watch specialist Jonathon Burford says the watches relating to the Budweiser Rocket Car run will appeal to a wide range of collectors.
“They are not simply watches, but a part of American history the like of which won’t be seen again,” he told WATCHPRO. “All three were part of a moment in time that epitomizes a spirit of adventure that was so prevalent in America during the 1970s – and they will appeal to everyone from watch purists to motorsport fans and Hollywood memorabilia collectors.
“We have estimated them at what we believe to be realistic levels, but we do believe they are sufficiently significant to attract very strong bidding,” he added.
Mr Barrett says he wore the two steel watches regularly and often for more than 30 years, as did his son, Stanton – until they saw the huge price realised by ‘Newman’s own’ Daytona back in 2017.
“When I saw how much that one sold for I decided that maybe it wasn’t such a smart idea for us to keep wearing the watches that Paul had given me,” he said.
“I’ll be very sad to see them go, but it feels like the right thing to do. I’ll probably give around 30 per cent to the charity Slavic Gospel that I have worked with for the past 35 years and use the rest to pay-off my property loan”.
And unless Mr Barrett has a very large loan, we suspect there might be some left-over.
The sale of the Stan Barrett/Paul Newman Rolex watches will take place at Sotheby’s, York Avenue, New York on 6 December 2022. More details available soon at sothebys.com.
How to Build a DCR Measuring Tool
build one of the most useful DIY guitar tools.
Welcome back to Mod Garage. After receiving numerous requests to show more DIY tools for guitarists, today we’ll explore one of my favorites. For years I’ve used this one in the shop daily and I’m sure you’ll love it. It’s cheap and easy to build, but very effective for analyzing circuits of electric guitars and basses without opening the electronic compartment or lifting the pickguard. It’s a kind of adaptor or extension to measure a pickup’s DC resistance (DCR) from outside the guitar. After building one, we’ll discuss how to interpret the measurements.
The DCR of a pickup is by far the most common parameter you can read when reading pickup descriptions and often it’s used as an indicator of the output. The reason for this is that it’s easy to measure, but, sadly, it doesn’t tell us anything about a pickup’s output nor its tone. To quote pickup designer Bill Lawrence: “DC resistance tells you as much about a pickup’s tone and output as the shoe size tells you about a person’s intelligence.”
I’ve written about DCR as a pickup parameter in detail and you can read about it in “Mod Garage: Demystifying DCR.”
DCR is not a primary parameter in pickup design. It’s simply the result of the type and gauge of the pickup’s wire, the number of turns, and other parameters like the winding pattern, etc. But it isn’t completely useless, and we can use it as a good reference point for analyzing pickups both inside and outside a guitar or bass circuit. All you need for this is a digital multimeter (DMM). You don’t need an expensive calibrated precision DMM—any entry level DMM will work. You can get a simple digital DMM for $10, but if you want to invest in a better device, it can’t harm.
The easiest way to analyze a pickup is outside a circuit. Simply set your DMM to ohm and connect the two pickup leads to your DMM. If your DMM doesn’t have an auto-range function, set it to 20k ohm. Now you’ll get the DCR reading for your pickup. You can compare it to the factory specs of your pickup and it should be close. If your DMM shows “infinite” or “overload,” you know the pickup wire is broken. Let’s say your pickup should read 7k ohm, but yours reads around 2-3k ohm. Your pickup likely has a short circuit somewhere in the winding. Used this way, the DCR is always good to quickly check if a pickup is alive or not.
To quickly analyze a guitar or bass circuit with one or more pickups, you first need to build the DIY adaptor tool this column is about. There are two different versions, and you don’t need much for this:
- Version #1: This is the quick and dirty version. You need a standard 6.3 mm straight mono plug (the same type on all your guitar cables), some wire of your choice (preferably in two different colors), and two insulated alligator clips.
- Version #2: A more elegant version that you can also use with a scope if you have one. You need the same parts as for version #1, but instead of two alligator clips, you need two 4 mm banana plugs, and the two wires need to be longer than what you’d use for Version #1.
So, heat up your soldering iron and let’s get to building version #1.
- Solder one piece of wire to the HOT terminal of the mono plug and another one to the GROUND terminal. I prefer a red wire for the HOT and a black wire for the GROUND terminal (Photo 1).
- Solder an insulated alligator-clip to each end of the two wires, preferably a black one to the black wire and a red one to the red wire. Ready!
Version #2 is built the same way, but, instead of alligator clips, you solder a 4 mm banana plug to each end of the two wires, if possible, also in black and red. The two wires should be long enough that can place your DMM and/or scope at some distance from the guitar. In Photo 2, you can see version #1 on the top and version #2 on the bottom.
The difference between the two versions is that with version #1 you put the plug into the output jack of the guitar, connecting the two probes of your DMM to the alligator clips: the black probe of the DMM goes to ground (black wire) and the red probe goes to hot (red wire) as seen in Photo 3. With version #2, you need to remove the two probes from your DMM, plugging the two banana plugs directly into your DMM or your scope, also seen in Photo 3.
Both versions work equally well. Version #2 is just easier to operate when you also want to use the adaptor for a scope.
For a quick check, you can also directly touch the hot and ground terminals with the probes of your DMM, but you need both hands or a second person for this if you want to play around with the controls or the pickup-selector switch.
Now we can easily check four things with this tool, assuming everything is connected the way it should be and your DMM is set to ohm and auto-range or the 20k ohm scale if your DMM doesn’t have an auto-range mode:
- Do you receive a reading on your connected DMM? If not, check if the volume pot is fully opened. Do you receive a reading now? If so, close the volume pot completely and see if you still receive a reading. No? Perfect, you just proved that the volume pot is alive and well.
- With a fully opened volume pot and a reading on your DMM, slowly turn down the volume and watch the reading on the DMM. If you receive some crazy reading, chances are good there is a treble bleed network on your volume pot. If the reading slowly goes down to zero, you know that there is no treble bleed network on the volume pot, and you can check if it’s an audio or linear volume pot (plus the taper it has, if it’s an audio pot). Let’s say we have a 500k volume pot. When you close the volume pot halfway and receive a reading around 250k, you know it’s a linear pot. An audio pot, depending on its taper, will result in a much higher reading on the first 50 percent of the volume pot. If you read 500k until the volume pot is almost fully closed, this means the pot has a 90:10 audio taper—exactly the kind of volume pot you don’t want to have. If you read something around 300k in the middle of the volume pot, you know it’s a 60:40 audio taper.
- If the volume pot is fully opened and you don’t receive a reading on your DMM, chances are good that your output jack is broken, not connected, or connected incorrectly. Please make sure there is no activated kill-switch in the circuit that can also cause this “problem.”
- Turning the tone knob(s) will make no difference in the reading you receive. If you receive a slightly higher reading with a tone pot fully opened compared to when it’s closed, you know it’s a no-load tone pot.
There is a lot to discover from just the outside of any guitar or bass. So, now let’s see what we can measure from outside the instrument starting with a Telecaster with a 4-way switch. The readings in all examples are the readings I received with guitars I had in the shop, but they can be different in your instruments:
- Bridge pickup only: 5.85k ohm
- Neck pickup only: 6.76k ohm
- Both pickups together: 3.18k ohm
- Pickup selector switch in position #4: 12.30k ohm
The readings for both pickups are within the factory specs and are in a typical range for a vintage-flavored Telecaster pickup set. With a reading of 3.18k ohm for both pickups together, you know that both pickups are in parallel. With the reading of 12.30k ohm, you know that both pickups are in series with each other.
Here is the simplified math behind these readings:
- Series connection: DCR pickup #1 + DCR pickup #2
- In our example, it’s 5.85k + 6.76k = 12.61k ohm, which is very close to the reading of 12.30k we received. The missing 0.31k ohm are eaten up by the resistance of the pots and the tolerance of your DMM. For this test, I chose the cheapest DMM I could find in the shop. A calibrated high-quality DMM will have much less tolerance.
- Parallel connection: (DCR pickup #1 + DCR pickup #2) divided by four
- In our example, it’s 5.85k + 6.76k = 12.61k ohm divided by four = 3.15k ohm, which is very close to the reading of 3.18k ohm we received.
Now let’s repeat this with a standard Stratocaster:
- Bridge pickup only: 7.07k ohm
- Middle pickup only: 5.88k ohm
- Neck pickup only: 5.70k ohm
- Bridge + Middle pickups together: 3.26k ohm
- Neck + Middle pickups together: 2.94k ohm
All three pickups are within the factory specs of this Strat. We have a slightly hotter bridge and two vintage-flavored pickups. The two in-between positions are in parallel.
Lastly, let’s try a vintage PAF-loaded Les Paul:
- Bridge pickup only: 7.77k ohm
- Neck pickup only: 7.09k ohm
- Both pickups together: 3.74k ohm
Both PAFs have the typical vintage DCR and are in parallel in the middle position.
That’s it. Next month we’ll take a deeper look at changing wires on pickups, which is something I’ve been asked about a lot, so stay tuned!Until then … keep on modding!
by Dick Wacker – PREMIER GUITAR