Digest for sci.electronics.repair@googlegroups.com - 10 updates in 3 topics

"Ian Field" <gangprobing.alien@ntlworld.com>: Jun 19 09:44PM +0100

"bitrex" <bitrex@de.lete.earthlink.net> wrote in message
news:dkd8z.2718$zY1.259@fx02.iad...
 
> You can build a single-tube regenerative set that, if designed and
> constructed carefully, will have much better performance over the AM and
> AM shortwave bands than many commercially available superhets.
 
Any kits available these days will probably be expensive.
 
There's plenty of simple circuits online and tubes can be salvaged from gear
that turns up at flea markets.
"Tom Del Rosso" <fizzbintuesday@that-google-mail-domain.com>: Jun 19 06:52PM -0400

Dan wrote:
> Looking for a tube only radio or radio kit
> AM or FM or AM FM
> More than standard broadcast range is desirable.
 
I tried finding one that used transistors and no all-in-one radio chip,
and turned up nothing.
Bennett Price <NOTbjprice@cal.berkeley.edu>: Jun 19 05:44PM -0700

On 6/19/2016 3:52 PM, Tom Del Rosso wrote:
>> More than standard broadcast range is desirable.
 
> I tried finding one that used transistors and no all-in-one radio chip,
> and turned up nothing.
 
Ebay has some AM transistor radio kits, i.e., unbuilt
http://ebay.to/1UiPPFA
 
as well as a variety of tube radios (AM, AM-FM. & AM-FM-SW), all built
 
and some AM tube kits http://ebay.to/1UiOXAN
 
one of which - a 7 tube AM radio - for $9 features:
 
two in the discharge standard circuit;
Modulated at 465KHz
Plastic shell for the new material, and never go back to feeding.
Each test port circuit Ic levels.
Schematics, assembly drawings, and the other parts list, technical
documents are complete.
 
Despite the description, it uses transistors, not tubes.
Ralph Mowery <rmowery28146@earthlink.net>: Jun 19 11:35PM -0400

In article <_LednW08hrYRofrKnZ2dnUU7-THNnZ2d@giganews.com>,
NOTbjprice@cal.berkeley.edu says...
> Schematics, assembly drawings, and the other parts list, technical
> documents are complete.
 
> Despite the description, it uses transistors, not tubes.
 
Probably something lost in the translation. Just as in England instead
of tubes they would be called valves.
 
Could be the instructions are also in Chineese.
Bennett <bjprice@cal.berkeley.edu>: Jun 20 07:16AM -0700

On 6/19/2016 8:35 PM, Ralph Mowery wrote:
 
> Probably something lost in the translation. Just as in England instead
> of tubes they would be called valves.
 
> Could be the instructions are also in Chineese.
 
Parts list and notes on the schematic are in Chinese (though parts
within the schematic are Roman, C1, R5, etc. Transistors are labeled
V1, V2, etc.)
 
Since the plastic case never needs feeding there is some slight
likelihood of a translation problem. http://ebay.to/28J5Lw7
Micky <NONONObobbyburns1111@gmail.com>: Jun 19 04:59PM -0400

>>> I have the same problem. Did you fix your charger?
 
>>No, it finally blew up and destroyed my house.
 
>I hate it when that happens!
 
People should really consider building a reinforced charger room for
their house, so when the charger blows, it only takes one room.
"pfjw@aol.com" <pfjw@aol.com>: Jun 19 06:13PM -0700

On Sunday, June 19, 2016 at 4:59:41 PM UTC-4, Micky wrote:
 
> >I hate it when that happens!
 
> People should really consider building a reinforced charger room for
> their house, so when the charger blows, it only takes one room.
 
What idiot would charge lead-acid (or any other large battery bank) indoors and unprotected anyway?
 
Peter Wieck
Melrose Park, PA
Rheilly Phoull <rheilly@bigslong.com>: Jun 20 01:18PM +0800


> What idiot would charge lead-acid (or any other large battery bank) indoors and unprotected anyway?
 
> Peter Wieck
> Melrose Park, PA
 
KERR---WOOSH !!!
JW <none@dev.null>: Jun 20 05:07AM -0400

On Mon, 20 Jun 2016 13:18:46 +0800 Rheilly Phoull <rheilly@bigslong.com>
 
>>>> I hate it when that happens!
 
>>> People should really consider building a reinforced charger room for
>>> their house, so when the charger blows, it only takes one room.
 
Clean-up is still a horrible mess, but yes, I do see your point sir.
I would also recommend using your favorite neighbor's house for these
charging forays.
 
 
>> Peter Wieck
>> Melrose Park, PA
 
>KERR---WOOSH !!!
 
What is left of my hair felt that!
Ignoramus2663 <ignoramus2663@NOSPAM.2663.invalid>: Jun 19 09:47PM -0500

Here's a followup to the story.
 
I bought a clamp-on AC/DC ammeter that Jeff mentioned.
 
I found a completely different alternator that I had laying around.
 
Installed it on the forklift and again, no power produced at idle.
 
However, we sped up the idle just barely, something like 10% higher,
and now we get nice 4-5 amps charging current at idle.
 
We also had to figure out which wires were for what. One was for
voltage sensing and another was for jumping the field.
 
For the original alternator, I purchased a rebuild kit and we rebuilt
it ourselves.
 
Thanks a lot to all for your help and encouragement.
 
i
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