S F Bay area "hamfest" today

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Rich Feldman
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S F Bay area "hamfest" today

Post by Rich Feldman » Sat Mar 14, 2015 1:54 pm

Today is the season opener for monthly electronics flea market in Cupertino, California.
http://www.electronicsfleamarket.com/

One of the things that used to make the USA great was having a Radio Shack store in every small city. Now, as that mismanaged company circles the drain, I have to go to the flea market to get a rotary potentiometer.
Mike echo oscar whisky! I repeat! Mike echo oscar whisky, how do you copy? Over.

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Rich Feldman
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Re: S F Bay area "hamfest" today

Post by Rich Feldman » Fri Mar 20, 2015 12:31 pm

With no time to prepare as a seller, I went as a buyer and took it easy.
The unexpected treasure was a bank of long power resistors, 100 K ohms each, handy as a HV ballast or load.
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It cost me $10, with a dual potentiometer joystick thrown in. One of the 10 resistors is open, though it's not obvious why or where. For curiosity's sake, I'd like to locate the defect nondestructively. Whether or not that's successful, we can see if the open resistor conducts when connected to an energized NST. :-)
Mike echo oscar whisky! I repeat! Mike echo oscar whisky, how do you copy? Over.

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Richard Hull
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Re: S F Bay area "hamfest" today

Post by Richard Hull » Fri Mar 20, 2015 11:44 pm

Those resistors in the wattage and ohm range shown are extremely rare now. You got a great deal. I buy every such resistor I run across as long as they are over 50 watts, over 50k ohms and wire wound.

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Rich Feldman
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The Turbo not taken

Post by Rich Feldman » Sun Apr 19, 2015 11:01 am

Another month, another hamfest, and again no time to sell.
I bought a few little things, incl. a cool resistor-substitution box.
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The bipolar meter is for electromagnet power supply.
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On the way out, I saw a turbomolecular pump for the first time at this venue. Seller didn't know much about them, and was asking $200 to start with. Wisely passed it up, since in 2 or 3 years I haven't got around to trying my little diffusion pump or my Danielson Tribodyn turbo drag unit.
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The 500 kV power supply was a module or two short of a set.
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Lots of things to look at, including flat wire wound the hard way.
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What do they call that movable coil in the middle, here supported by wood?
Mike echo oscar whisky! I repeat! Mike echo oscar whisky, how do you copy? Over.

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Richard Hull
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Re: S F Bay area "hamfest" today

Post by Richard Hull » Sun Apr 19, 2015 5:30 pm

Thanks for the pix of the hamfest goodies. More folks should use this venue. I have a "files post" about hamfesting. I go to about 10 each year. I have posted many goodies in images over the years here. You never know what you will find. Last month at Raliegh, NC I scored 3 Nim bin modules @ $10.00 each! They worked perfectly.

Now I tend to go as a seller, but also have a friend who goes with me to mind my sales when I want to roam about, buying. Recent aquistions attached.

Variac 220 volt 8 amp only $10.00....Had borken brush. Fixed with new brush assembly Works great.
lithium-Ion batts new in packs Bought a lot of 15 of 3 different sizes/mAh ratings. $20.00
GM counter $40.00 did'n't work......... replaced 2 Germanium low gain transistors. Works fine now.
Solar panel 20 volt 400ma....$30.00 Large microammeter $3.00

Richard Hull
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Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Andrew Robinson
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Re: S F Bay area "hamfest" today

Post by Andrew Robinson » Tue Apr 21, 2015 5:22 am

Darn, wish you had pinged me Richard. Totally forgot to look into dates for Raleigh hamfest. I said last year I would pay attention and go. Oh well :(
I can wire anything directly into anything! I'm the professor!

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Re: S F Bay area "hamfest" today

Post by Richard Hull » Tue Apr 21, 2015 5:35 am

There is another nice one at Cary nearby real soon if it already hasn't happened. Don't remember the date.

Sorry you missed Raleigh. There were two regulars there from UNC. That is who I bought the NIM modules from. They also had three NIM bins for $75.00 each. A bit dirty, but in good operating condition. If I didn't have 6 bins already I might have been tempted to buy.

RichardHull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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Andrew Robinson
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Re: S F Bay area "hamfest" today

Post by Andrew Robinson » Tue Apr 21, 2015 3:05 pm

I can wire anything directly into anything! I'm the professor!

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Rich Feldman
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Re: S F Bay area "hamfest" today

Post by Rich Feldman » Tue May 12, 2015 5:54 pm

Last Saturday I took a seller's space for the first time in 2015. Got a ton of stuff permanently out of the garage, into the hands of people who want it. Including everything left from my BDI Auction pallet load, and from a technology-rich Free pile in front of somebody's house a couple weeks ago. It's amazing how many things flea marketers will take, when marked $1 or free. Got $15 for the dusty old 12 VDC to 400 Hz dynamotor, and for the 8-foot long cylindrical PV array made for use with a concentrator.
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Refused to bargain on other items when would-be buyer foolishly walked away from an already-good deal.
My first sale was an airborne 16mm movie camera relic, in teardrop-shaped housing, for $20. It had been stored in boxes since high school in the 1970's, when I once ran some B&W footage through it (and developed the film in buckets). Buyer was still there when a regular pulled into the next seller space. Newcomer offered him $50 for the same item, which was rejected.

I bought just one item, for $5, from an immediate neighbor. A 1-torr Baratron that runs on 120 volts AC.
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It might well work, unless it's missing a board for that edge connector. Are the reference vacuum seals and getter supposed to last a lifetime?

Later that weekend I filled 3 recycling toters and 2 garbage toters with other garage stuff. Soon there will be space to make things again. :-)
Mike echo oscar whisky! I repeat! Mike echo oscar whisky, how do you copy? Over.

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Richard Hull
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Re: S F Bay area "hamfest" today

Post by Richard Hull » Wed May 13, 2015 5:35 am

Good deal on the Baratron. I had one of the exact same item. It was shot and never worked. I do not think the board is necessary and may have been a calibration thingy.(factory).

The guy who would know is Steve Hansen he worked for that company for years and is now retired. He runs the Bell Jar website. give him a shout.

Hamfests are a number one hunting ground for all manner of goodies not necessarily ham related!

Richard Hull
Progress may have been a good thing once, but it just went on too long. - Yogi Berra
Fusion is the energy of the future....and it always will be
Retired now...Doing only what I want and not what I should...every day is a saturday.

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