Search found 125 matches

by Tommy volts
Mon Mar 08, 2010 2:15 pm
Forum: General Discussion
Topic: Jameco 664 EPROM Programmer
Replies: 9
Views: 2059

Re: Jameco 664 EPROM Programmer

I will take off the metal cover and look inside.
by Tommy volts
Thu Mar 04, 2010 9:43 am
Forum: General Discussion
Topic: Jameco 664 EPROM Programmer
Replies: 9
Views: 2059

Re: Jameco 664 EPROM Programmer

Still no success.
by Tommy volts
Mon Jan 18, 2010 1:02 pm
Forum: General Discussion
Topic: Jameco 664 EPROM Programmer
Replies: 9
Views: 2059

Re: Jameco 664 EPROM Programmer

Janitor Tzap, Don't feel alone. Very few EEs out there have ever even seen an EPROM, much less programmed one. UV Eraser, whats that? There is no available information on EPROM programmers out there. It's all flash ROM now. I did find a 24 pin chip that may work though. It is the 2716 EPROM. It has ...
by Tommy volts
Wed Jan 13, 2010 10:51 am
Forum: General Discussion
Topic: Jameco 664 EPROM Programmer
Replies: 9
Views: 2059

Re: Jameco 664 EPROM Programmer

Jameco emailed me back yesterday. They have no knowledge of the Jameco EPROM programmer system. They also said that EPROMS are obsolete. Unfortunately there aren't many folks like me that have an interest in restoring old stuff like radios and historical technology. When I rebuilt an old 1930's vacu...
by Tommy volts
Tue Jan 12, 2010 10:06 am
Forum: General Discussion
Topic: Jameco 664 EPROM Programmer
Replies: 9
Views: 2059

Jameco 664 EPROM Programmer

Hello forum members, Last weekend I bought a Jameco 664 EPROM programmer and a UV Eraser at a Hamfest. I assumed I could find information on the programmer on the web. I can't find any information whatsoever. No manual, no circuit /design examples. Not anything. It is as though the programmer never ...
by Tommy volts
Mon Jun 09, 2008 8:31 am
Forum: General Discussion
Topic: Potentials at house outlets
Replies: 12
Views: 2949

Thanks to all of you for your kind and very helpful replies. This is a very serious matter to me because my boys are using this equipment. Over the weekend I tested both outlets at the garage where the accident occured. One of the outlets tested o.k., but the test on the other outlet showed the hot ...
by Tommy volts
Thu Jun 05, 2008 1:15 pm
Forum: General Discussion
Topic: Potentials at house outlets
Replies: 12
Views: 2949

Potentials at house outlets

Dear Forum Members: Two days ago my son was severely shocked when he grabbed two electrified guitars, one in each hand. His hands locked up around the necks and he fell unconscious. His brother pried one of the guitars from his hand and he is now o.k. The strings on both guitars were properly ground...
by Tommy volts
Fri Jun 01, 2007 3:19 pm
Forum: General Discussion
Topic: crystal radio using vacuum tube diode
Replies: 12
Views: 4002

Chris: My bad for using the word simple. I looked up some info on the 6AL5 vacuum tube diode and now realize how complicted vaccum tubes and their applications really are. The diode application on a receiver seemed like the simplest way to actually use a vacuum tube until I just did the research. I ...
by Tommy volts
Fri Jun 01, 2007 1:23 pm
Forum: General Discussion
Topic: crystal radio using vacuum tube diode
Replies: 12
Views: 4002

Externet, Thank you for replying. Actually, I'm not necessarily looking to build a "crystal" radio. What I want to build is a simple vacuum tube project. If I do build the receiver, the vacuum tube would simply replace the germanium diode in the detctor circuit. It should work?? There would be trans...
by Tommy volts
Fri Jun 01, 2007 11:01 am
Forum: General Discussion
Topic: crystal radio using vacuum tube diode
Replies: 12
Views: 4002

crystal radio using vacuum tube diode

Hello Forum Members: I would like to build a simple crystal radio receiver (coil,diode and antenna) using a vaccum tube diode instead of a germanium diode. This would be my first vacuum tube project and seems to be about the simplest practical application. If I can get this simple application to wor...
by Tommy volts
Fri Feb 02, 2007 3:51 pm
Forum: General Discussion
Topic: Monochrome ntsc tv "out" project
Replies: 6
Views: 2772

GoingFastTurningLeft:

I don't recall seeing that article, can you find which issue it is in?
by Tommy volts
Thu Dec 21, 2006 7:49 am
Forum: General Discussion
Topic: Palm Pilot Controller
Replies: 1
Views: 1014

I'm not sure what level you are at with doing this sort of stuff, but I would recommend researching information on the palm pilot robot to get started. There is a ton of info on the robot and even a pretty good book. I loaded "catspaw basic" onto my palm pilot which is what you might consider using ...
by Tommy volts
Fri Dec 01, 2006 8:20 am
Forum: General Discussion
Topic: 4050 Non Inverting Hex Buffer
Replies: 7
Views: 2274

GoingFastTurningLeft My application is a sequential controller: Each of the 3 outputs from a 74HC/HCT93 Modulo 8 binary counter will be connected to it's own hex buffer. 6 outputs from each buffer (now 18 total outputs) will then be tied to various inverters and triple input quad AND logic gates. T...
by Tommy volts
Thu Nov 30, 2006 1:07 pm
Forum: General Discussion
Topic: 4050 Non Inverting Hex Buffer
Replies: 7
Views: 2274

4050 Non Inverting Hex Buffer

Dear forum members,

Please consider my question below:

Can a single output from a 4050 Non Inverting Hex Buffer power all six inputs (inputs tied together) of another 4050 Non Inverting Hex Buffer?

Supply voltage for both buffers will be 4.5 volts.


Thank you.
by Tommy volts
Thu Oct 12, 2006 8:39 am
Forum: Up For Grabs
Topic: Heathkit IO-103 10 MHz single trace scope
Replies: 3
Views: 3708

jimenglish,

Please post a picture.