From w8nf at yahoo.com  Wed Dec  1 04:13:04 2010
From: w8nf at yahoo.com (Dave Haupt)
Date: Wed, 1 Dec 2010 01:13:04 -0800 (PST)
Subject: [FreeBay] Two ugly old homebrew power supplies..free for the cost
	of shipping
In-Reply-To: <SNT121-W484C516ECAB2387F95DF7C8C240@phx.gbl>
Message-ID: <328010.80223.qm@web53501.mail.re2.yahoo.com>

Not my best work...the metal work is ugly.

Power supply #1 actually works, as in, it delivers 12.9V, which stays within regulation with a 10 ohm 10W resistor attached.  1970s vintage fake wood-grain cabinet purchased new from Allied Radio Shack in the 1970s.  Transformer is marked "Heyboer 26.8VCT 1.7A...which means I wired it as a full-wave center-tapped device and expected 3 amps or more out of it.  I know darned well I originally built this thing with a Radio Shack transformer, and I also know that I contracted with Heyboer for custom transformers circa 1982 in my first professional job.  So I must have "upgraded" it at some point.  The regulator looks like a 3-terminal device with outboard pass transistor, whose markings have worn off.  I must have been fighting a hum problem, as the filter is 8 electrolytics in parallel on vectorboard.

Photos of "wood grain" power supply:

http://home.comcast.net/~haupt8948/wg1.jpg
http://home.comcast.net/~haupt8948/wg2.jpg
http://home.comcast.net/~haupt8948/wg3.jpg
http://home.comcast.net/~haupt8948/wg4.jpg
http://home.comcast.net/~haupt8948/wg5.jpg

Yes, there are holes in the box that aren't used, and one of the rubber feet is missing.  Also, there's some white paper-like substance stuck to the ridiculously skimpy power cord.  At least I included a fuse.

The second power supply is uglier, if possible, built in a plain aluminum box.  This one used a custom transformer, 35V CT at 1.5A.  The industrial purpose was to create +18V, and +/-15V from one transformer.  For this one, I'd have re-wired it as a full-wave center tap, trying to get 13.8V at 3A out of it...but it actually measures 31V and is not regulated, so I'd say the regulator circuit is blown, but the transformer, diodes, and caps are good.

This one has a 3-prong grounded cord and is also fused.  Photos:

http://home.comcast.net/~haupt8948/alum1.jpg
http://home.comcast.net/~haupt8948/alum2.jpg
http://home.comcast.net/~haupt8948/alum3.jpg
http://home.comcast.net/~haupt8948/alum4.jpg
http://home.comcast.net/~haupt8948/alum5.jpg

I can't tell what the intended circuit of the regulator is on this one, but it doesn't have enough heat-sinking.


Arrangements:

Either power supply ships in a medium flat-rate Priority Mail box ($10.70 in the US), or both in a large flat-rate box ($14.50 in the US).  No charge for the power supplies, just reimburse shipping.

73,

Dave W8NF


      

From w8nf at yahoo.com  Wed Dec  1 04:14:28 2010
From: w8nf at yahoo.com (Dave Haupt)
Date: Wed, 1 Dec 2010 01:14:28 -0800 (PST)
Subject: [FreeBay] Addenda: Two homebrew power supplies
In-Reply-To: <SNT121-W484C516ECAB2387F95DF7C8C240@phx.gbl>
Message-ID: <798695.38891.qm@web53504.mail.re2.yahoo.com>

The power supplies go to the first person who asks, and supplies a valid shipping address...I've had to wait as much as three weeks before someone came back with a shipping address.  My goal is to have them gone...

Thanks and 73,

Dave W8NF


      

From ma.locksmith at juno.com  Sat Dec  4 16:59:18 2010
From: ma.locksmith at juno.com (ma.locksmith at juno.com)
Date: Sat, 4 Dec 2010 16:59:18 -0500
Subject: [FreeBay] Computer drives
Message-ID: <20101204.140000.995.160094@mailpop07.dca.untd.com>

I don't expect anyone wants one of these, but I've "got" to ask anyway.

Have box of various computer drives....  floppy (all types), hard (SCSI),
and even a CD-RW.

Of course, no drivers.

Free for postage

Ed

.
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From ma.locksmith at juno.com  Sun Dec  5 18:00:07 2010
From: ma.locksmith at juno.com (ma.locksmith at juno.com)
Date: Sun, 5 Dec 2010 18:00:07 -0500
Subject: [FreeBay] 3M DC2120 cartridge tape
Message-ID: <20101205.150110.983.27153@mailpop01.dca.untd.com>

Have two....  postage only

Ed
____________________________________________________________
Scholarships for Moms
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From w8nf at yahoo.com  Fri Dec 10 12:41:09 2010
From: w8nf at yahoo.com (Dave Haupt)
Date: Fri, 10 Dec 2010 09:41:09 -0800 (PST)
Subject: [FreeBay] Windows NT 4.0, in shrink wrap
Message-ID: <426102.55337.qm@web53503.mail.re2.yahoo.com>

Full installation package.  One CD and three floppies.  You boot from the floppies, then at the indicated point, insert the CD.

This is an OEM package that came with an HP Vectra XU/200 machine...which than ran on Linux all its life.  Unused.  In sealed package with the user manual and Certificate of Authenticity, which carries the product ID needed for installation.

Will ship in a flat-rate priority envelope for about $5.

Please include your shipping address when replying.

73,

Dave W8NF


      

From w8nf at yahoo.com  Fri Dec 10 15:46:59 2010
From: w8nf at yahoo.com (Dave Haupt)
Date: Fri, 10 Dec 2010 12:46:59 -0800 (PST)
Subject: [FreeBay] Taken: Windows NT in shrink wrap
Message-ID: <317034.9819.qm@web53506.mail.re2.yahoo.com>

I didn't expect it to be so popular.  It's been spoken for, thanks guys.

73,

Dave W8NF


      

From w8nf at yahoo.com  Thu Dec 16 23:58:27 2010
From: w8nf at yahoo.com (Dave Haupt)
Date: Thu, 16 Dec 2010 20:58:27 -0800 (PST)
Subject: [FreeBay] Free for shipping: 1.9GHz mag-mount mobile antenna
Message-ID: <143332.56507.qm@web53502.mail.re2.yahoo.com>

Standard issue for use with cellular telephone system measurement devices.  Made by Antenna Specialists.  Cable is double-shielded RG-58, approx 6 feet long.  Cable is terminated in a TNC connector, and the antenna "package" includes a TNC to type N adapter.  The whip itself unscrews but I do not recognize the thread.  Photo collage of these details is here:

http://home.comcast.net/~haupt8948/ant.jpg

For size ref, that mag-mount base is 2.5" diameter.

Shipping via parcel post will be under $10 anywhere in the US.  Antenna is too large for a small flat-rate box, so if it goes Priority, it will be $10.70 in a medium flat-rate box.

73,

Dave W8NF


      

From ei4gob at gmail.com  Tue Dec 28 13:49:28 2010
From: ei4gob at gmail.com (Fionnbarra MacTreanfhir)
Date: Tue, 28 Dec 2010 18:49:28 +0000 (UTC)
Subject: [FreeBay] Invitation to connect on LinkedIn
Message-ID: <1009433613.24944392.1293562168576.JavaMail.app@ela4-bed36.prod>

I'd like to add you to my professional network on LinkedIn.

- Fionnbarra

Fionnbarra MacTreanfhir
Independent Computer Networking Professional

Confirm that you know Fionnbarra MacTreanfhir
https://www.linkedin.com/e/-3s77jd-gi95il8c-6u/isd/2067126871/gZ85AsaZ/EML-invite_guest_no_snack_59/

(c) LinkedIn 2010


