EMRFD Message Archive 10198

Message Date From Subject
10198 2014-08-03 18:06:39 Edwin Carter To change the subject, a different question
Talking about hoarding things, I kept a few of those 8 inch battery
operated TV's. Useless now since they switched over to digital. But I've
always hoped someone would come up with and adapter to turn on into an
oscilloscope . No luck so far. You got any idea's?

Edwin P Carter / WA4YHL
10199 2014-08-03 19:11:03 Ashhar Farhan Re: To change the subject, a different question
edwin,

just couple that to the composite video output of the rapsberry pi. then, you have a nice 'home computer' chugging along that can control your rigs, test equipment, etc. there have been some rumours that it can output NBFM directly, but I havent seen any evidence yet.

- f


10200 2014-08-03 19:44:40 David Re: To change the subject, a different question
That would be a good use except that small LCD monitors are so inexpensive now.

CRTs intended for raster scan do not make very good oscilloscope CRTs anyway
unless used as part of a digital storage oscilloscope.

On Mon, 4 Aug 2014 07:40:55 +0530, you wrote:

>edwin,
>
>just couple that to the composite video output of the rapsberry pi. then,
>you have a nice 'home computer' chugging along that can control your rigs,
>test equipment, etc. there have been some rumours that it can output NBFM
>directly, but I havent seen any evidence yet.
>
>- f
>
>
10201 2014-08-03 20:23:44 EricJ Re: To change the subject, a different question
Yea, toss them and look into the incredibly inexpensive digital scopes available today. Some have dedicated LCD screens. Some connect via USB to a PC.

At the low end is a $70 20 mhz dual trace USB scope for a PC that will knock the socks off of anything that could be reasonably built based on an old 8" TV.

http://www.circuitspecialists.com/digital-storage-oscilloscopes/page-2

At the higher end, you can get a dedicated scope not requiring a PC. Crisp 7" color LCD, 200 mhz digital storage scope for $420, about the price of a high end QRP transceiver like the Elecraft K1. At the push of a button, it saves a jpg of the screen on a thumb drive. Love it.

I only picked Hantek and Circuit Specialists for an example because I bought the Hantek DSO5202 200mhz scope from them and it has done an outstanding job for me. But there are a few other companies providing competitive equipment. I don't mind buying Chinese gear if I have an actual brick and mortar U.S. company to deal with. More likely to get the customer service we are used to in this country.

Eric
KE6US



10202 2014-08-03 21:03:39 David Re: To change the subject, a different question
I am more partial to older analog and digital storage oscilloscopes which are
relatively easy to maintain. While I know that a good PC based digital storage
oscilloscope could be made, I have yet to see one.

On Sun, 3 Aug 2014 20:23:37 -0700, you wrote:

>Yea, toss them and look into the incredibly inexpensive digital scopes
>available today. Some have dedicated LCD screens. Some connect via USB
>to a PC.
>
>At the low end is a $70 20 mhz dual trace USB scope for a PC that will
>knock the socks off of anything that could be reasonably built based on
>an old 8" TV.
>
>http://www.circuitspecialists.com/digital-storage-oscilloscopes/page-2
>
>At the higher end, you can get a dedicated scope not requiring a PC.
>Crisp 7" color LCD, 200 mhz digital storage scope for $420, about the
>price of a high end QRP transceiver like the Elecraft K1. At the push of
>a button, it saves a jpg of the screen on a thumb drive. Love it.
>
>I only picked Hantek and Circuit Specialists for an example because I
>bought the Hantek DSO5202 200mhz scope from them and it has done an
>outstanding job for me. But there are a few other companies providing
>competitive equipment. I don't mind buying Chinese gear if I have an
>actual brick and mortar U.S. company to deal with. More likely to get
>the customer service we are used to in this country.
>
>Eric
>KE6US
10203 2014-08-03 21:29:31 Ed Manuel Re: Analog B/W TV's
In the great technological progression there's:

The new stuff . . . most of us can't afford it
Technologically Obsolete - the stuff we crave and use every day
Functionally Obsolete - we now call it collectible or antique - and we pay more for it
Junk - my 8", B/W CRT analog TV - we keep it for another 10 years until somebody points it out and it goes to recycling this week.

73, Ed - N5EM