Heathkit arising again?

I

I got a couple of Atom based mini-ITX boxes from logicsupply.com, all assembled and tested. Their support was great. I had my IT guy install XP on them.

--

John Larkin                  Highland Technology Inc 
www.highlandtechnology.com   jlarkin at highlandtechnology dot com    

Precision electronic instrumentation 
Picosecond-resolution Digital Delay and Pulse generators 
Custom timing and laser controllers 
Photonics and fiberoptic TTL data links 
VME  analog, thermocouple, LVDT, synchro, tachometer 
Multichannel arbitrary waveform generators

I

I've had a monitored alarm system for 20 years... like you, specifications and testing as required by the insurance.

In 20 years, only false alarms... wind blowing a not-fully-closed door open, or cleaning people forgetting their special code :-(

I always got there just before the police... I drive faster >:-} ...Jim Thompson

--
| James E.Thompson                                 |    mens     | 
| Analog Innovations                               |     et      | 
| Analog/Mixed-Signal ASIC's and Discrete Systems  |    manus    | 
| San Tan Valley, AZ 85142   Skype: Contacts Only  |             | 
| Voice:(480)460-2350  Fax: Available upon request |  Brass Rat  | 
| E-mail Icon at http://www.analog-innovations.com |    1962     | 
              
I love to cook with wine.     Sometimes I even put it in the food.

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Oh, I forgot... 

A friend gave me an SG-8 which works and which I'm converting from 
Heath's 432-3 connectors to BNC. 

Sacrilege perhaps, but I couldn't find any adapters. 

I vaguely remember those connectors being made by RCA or Amphenol, but 
I've not been able to recall the details. 

Clue, anyone?

Standard high impedance microphone connector of last millennium

Made by Amphenol, Calrad, Philmore, Switchcraft and dozens of others.

Switchcraft 2501 series. Remove the spring, and add a BNC connector. BTDT, it worked fine. :)

What about their TV kits? That's RF but I always doubted they were any good.

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Reply in group, but if emailing remove the last word.

I built a few of their TV's back in the 60's. consumer reports rated the pi cture as being fuzzy, after which they sent out a kit with new rf video pea king coils to increase the video bandwidth. That improved it slightly. Hard est part was adjusting the convergence. Also built a DX60 ham radio transmitter, and still wonder to this day why y ou needed to have a vertical wire next to the rf output tube which needed t o be wiggled around for best performance! Full confession; I was using an external VFO instead of crystals while I wa s still just a Novice. Hopefully the statue of limitations has run out on t hat one!

Bob

It was a variable capacitor, with the other electrode at the plate inside the bottle. The wire was connected to the low end of the grid tank. The purpose of the whole is to compensate for the plate-grid capacitance of the tube. The solution was called neutralization.

And, before you ask, the parallel resistor-coil combination next to the plate cap was to kill parasitic VHF oscillation tendency.

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Tauno Voipio, OH2UG

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Right you are! 

Thanks, Michael.

Why? They took a commercial TV design and sold it as a kit. Did you forget that they were owned by Zenith for a long time? The critical circuits were factory built and aligned. Anything after the tuner & IF stages is simple enough to be assembled at home. The hardest part was to converge the color CRT, and a crude crossbar generator was part of their color TV kit.

You're welcome, as always. :)

Here is the manual, if you want an electronic copy.

Switchcraft made a 2501F to 1/4" phone jack adapter. They used to be popular for kids to use an old PA amp to play electric guitars.

survey. I

transceiver

assembled

The Atoms is an amazing achievement by Intel. I ran a 1-1/2h clinical trial completely on a small battery and, to the amazement of everybody, at the end the battery showed that we have could gone on for at least another 3h.

--
Regards, Joerg 

http://www.analogconsultants.com/

I never had an interest in their TV kits... I was immersed in my father's radio & TV repair shop ;-) ...Jim Thompson

-- | James E.Thompson | mens | | Analog Innovations | et | | Analog/Mixed-Signal ASIC's and Discrete Systems | manus | | San Tan Valley, AZ 85142 Skype: Contacts Only | | | Voice:(480)460-2350 Fax: Available upon request | Brass Rat | | E-mail Icon at

| 1962 | I love to cook with wine. Sometimes I even put it in the food.

survey. I

transceiver

centric.

assembled

The real disadvantage of Intel machines is that they have no direct i/o capability. Just a complex dram interface, PCIe, and USB. The little ARM boards usually have some sort of parallel logic capability and often have analog inputs.

--

John Larkin                  Highland Technology Inc 
www.highlandtechnology.com   jlarkin at highlandtechnology dot com    

Precision electronic instrumentation 
Picosecond-resolution Digital Delay and Pulse generators 
Custom timing and laser controllers 
Photonics and fiberoptic TTL data links 
VME  analog, thermocouple, LVDT, synchro, tachometer 
Multichannel arbitrary waveform generators

Look up "neutralization".

--
"For a successful technology, reality must take precedence  
over public relations, for nature cannot be fooled." 
                                       (Richard Feynman)

I

Sounds like you have scripts globally disabled. Kind of brute force when a more nuanced approach is needed and available. Use firefox and the noscript addon (preferably with ghostery); very fine grained script control.

Whoa, there is a big time difference between those two technologies becoming common. PCBs made the grade in the late 1950s and SMD made the grade in the early 1980s

Nonsense. Works just fine even today, just no SMD for (less than high end) hobbyists.

Wave soldering????? That too is defunct. Hobbyists (rather high end) can convert toaster ovens to reflow soldering machines. That has been "out there" for over a decade. JUASE.

That has been tried a few times. No traction. PICkit, dogbone, and RaspberryPi are better ideas now

Sounds to me that you really need to visit places like sparkfun, olimex, and elefun.

More like more freeform module connection like your 3 paragraphs above idea for kit producers.

You really need to "get out" more.

?-)

^^^^ 6146 ?

?;-)

software

Oh but there is. Moreover it is nearly the original point from the original enabling legislation. Not so much all the variations since then. Just the same, it seems to be dying.

?-)

To most people that only becomes apparent, and frighteningly so, after a major nature event (Earthquake, hurricane, flooding, et cetera) has wiped out the usual communications infrastructure. It becomes kind of impossible to send off a text message when all the cell towers in the vicinity are floating around in muck.

Moreover it is nearly the original point from the

Not in the US. In contrast to much of the rest of the world ham radio licenses are actually on the increase.

--
Regards, Joerg 

http://www.analogconsultants.com/