Tacos Digest, Vol 216, Issue 2

Tue Mar 2 08:14:23 EST 2021

 Sandy and company,

I remember the 'ice cube' modules as well. 
Don't ever recall getting one of them to work.

As Howard and others remembered, it was the International Crystal modules that vexed the memory.
Yet to find schematics for them, but no big deal. 
Always a work around. 

Anyhow....

Been playing with adapting power tool batteries for other duties for a while now.

This is a link to a photo article where I took an MFJ VSWR analyzer gizmo and adapted it to a Harbor Freight Bauer power tool pack.
Went from a few hours of operation on AA cells to days.

https://imgur.com/gallery/OfTkCWI

So far most everybody who has tried it, likes it.

Explained it this way to an aircraft mechanic yesterday. 
You stock AA's, D's, 9V's and now DeWalt's. 
Just think of it as another size / type package.
That worked. 
As humans we get programmed into ways of thought. 
Ryobi batteries in Ryobi power tools, not any more! 
Once we get past that mindset this can happen.
High quality batteries for other 'off brand' tasking. 
Or to steal a line from Frank Perdue "Volts is Volts".

Now to make a 20 volt battery play nice with a 12 volt instrument took a down stream DC to DC converter module.
Don't have an article on that handy, but this will get the idea across. 
It's a little module that is a small stereo power amplifier.
https://imgur.com/gallery/xQett
Nice compact housing and a strong insulated case. 
Class D amps don't make much heat so that is not an issue.

Had to print the battery slide and a case for the converter. 
Many of the Amazon modules are wonderful, but lack a useful way to mount them.
When you make your own housings, that's easy.

About your project idea. 
That should be easy. 
Exactly what kind of battery do you have in mind?
You would be astonished how specific these batteries are to avoid brand A to work on brand B. 

If you want I will try to borrow one from a Norfolk radio club member and work out a battery slide to fit.
On top of that make a housing for the DC to DC gear.

Can even slide in a USB charger or two.

Share a thought. 
This might be fun. 
Perhaps a club project with others that have printers?

Mike

Michael F. Chisena 
KA2ZEV at Yahoo.com 
Notice the new phone number..... 703 344 8864 

"You are, what you do, when it counts" 
The Masso

     On Tuesday, March 2, 2021, 12:13:38 AM EST, <tacos-request at amrad.org> wrote:  

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than "Re: Contents of Tacos digest..."

Today's Topics:

  1. Re: question based on a dim memory and some updates
      (Elton A Sanders)
  2. RE: question based on a dim memory and some updates
      (samudra.haque at gmail.com)
  3. Re: question based on a dim memory and some updates
      (Elton A Sanders)
  4. Tube TV set accidentally transmits audio? (Martin)
  5. Re: Tube TV set accidentally transmits audio? (Alex Fraser)
  6. Re: Tube TV set accidentally transmits audio? (lstoskopf at cox.net)

----------------------------------------------------------------------

Message: 1
Date: Mon, 01 Mar 2021 11:00:00 -0600
From: "Elton A Sanders" <wb5mmb at pobox.com>
To: tacos at amrad.org
Subject: Re: question based on a dim memory and some updates
Message-ID: <f0408ecf-17a5-4d10-9e34-98f62db60fe6 at www.fastmail.com>
Content-Type: text/plain;charset=utf-8

Are you talking about the epoxy cubes with wires 
sticking out the top that look like they were 
molded in an ice cube tray? Cant remember what 
they were called but they did lots of things.
A useful thing would be a socket to take power 
tool batteries with or with out a regulator to 12v or 5v.
      Sandy
    WB5MMB

At 09:14 PM 2/28/2021, Michael Chisena via Tacos wrote:
>Hi all, The question. In the old, and Im talking 
>60's or 70's ham magazines there was a vendor 
>that sold little modules that could be hooked up 
>to product various items. Individually not too 
>complex but string enough of them together and 
>you can make basic projects out of them. Any 
>idea of what they are called? Product names, 
>vendors, data along that line. Schematics of the 
>various modules? Given all the neat modules on 
>places like Amazon, was wondering if this could 
>be a product again. One of my x bosses made a 
>converter module that took an ordinary vehicle 
>AM/FM and turned it into a multi mode AM stereo 
>receiver with pilot detection. Been working on 
>some projects. This is my second batch of Type 
>538 camera batteries as a work in progress. 
>https://imgur.com/gallery/dVlXKHK Been playing 
>with an idea of making a power bank for a laptop 
>I have here. It would use hot swapable power 
>tool batteries. So far the prototype has been 
>kinda neat. Share a thought as time permits. 
>Thanks in advance. Mike Michael F. ChisenaÂ 
>KA2ZEV at Yahoo.comÂ Notice the new phone 
>number..... 703 344 8864 "You are, what you do, 
>when it counts"Â The Masso 
>_______________________________________________ 
>Tacos mailing list Tacos at amrad.org 
>https://lists.amrad.org/mailman/listinfo/tacos

------------------------------

Message: 2
Date: Mon, 1 Mar 2021 12:17:00 -0500
From: <samudra.haque at gmail.com>
To: "'Elton A Sanders'" <wb5mmb at pobox.com>,    <tacos at amrad.org>
Subject: RE: question based on a dim memory and some updates
Message-ID: <078501d70ebe$b10cf330$1326d990$@gmail.com>
Content-Type: text/plain;    charset="utf-8"

Sandy, can I ask for what kind of power tools battery and use case? I see the benefit of the idea, but wonder about all the different kinds of batteries and the battery terminals - requiring a different 'adapter cap' - unless there is a chance the converter PCB can be common to various kinds of terminal adapters (Black & Decker, DeWalt, Ryobi, Stihl, ...) and the applications might be medium duty current load so no loose connections. Also, the mass of a battery holder case could outweigh the advantages of field power conversion. 

Would you consider a battery power converter that comes with a rubber band / Velcro strap to be usable in the field? My guess it would weigh in grams with the safety and power converter electronics ?

It's interesting for me as well, as I see the batteries of my drill machine on the shelf. And a whopping big battery charger for it right next to it.

-----Original Message-----
From: Tacos <tacos-bounces+samudra.haque=gmail.com at amrad.org> On Behalf Of Elton A Sanders
Sent: Monday, March 1, 2021 12:00 PM
To: tacos at amrad.org
Subject: Re: question based on a dim memory and some updates

Are you talking about the epoxy cubes with wires sticking out the top that look like they were molded in an ice cube tray? Cant remember what they were called but they did lots of things.
A useful thing would be a socket to take power tool batteries with or with out a regulator to 12v or 5v.
      Sandy
    WB5MMB

At 09:14 PM 2/28/2021, Michael Chisena via Tacos wrote:
>Hi all, The question. In the old, and Im talking 60's or 70's ham 
>magazines there was a vendor that sold little modules that could be 
>hooked up to product various items. Individually not too complex but 
>string enough of them together and you can make basic projects out of 
>them. Any idea of what they are called? Product names, vendors, data 
>along that line. Schematics of the various modules? Given all the neat 
>modules on places like Amazon, was wondering if this could be a product 
>again. One of my x bosses made a converter module that took an ordinary 
>vehicle AM/FM and turned it into a multi mode AM stereo receiver with 
>pilot detection. Been working on some projects. This is my second batch 
>of Type
>538 camera batteries as a work in progress. 
>https://imgur.com/gallery/dVlXKHK Been playing with an idea of making a 
>power bank for a laptop I have here. It would use hot swapable power 
>tool batteries. So far the prototype has been kinda neat. Share a 
>thought as time permits.
>Thanks in advance. Mike Michael F. ChisenaÂ KA2ZEV at Yahoo.comÂ Notice 
>the new phone number..... 703 344 8864 "You are, what you do, when it 
>counts"Â The Masso _______________________________________________
>Tacos mailing list Tacos at amrad.org
>https://lists.amrad.org/mailman/listinfo/tacos
_______________________________________________
Tacos mailing list
Tacos at amrad.org
https://lists.amrad.org/mailman/listinfo/tacos

------------------------------

Message: 3
Date: Mon, 01 Mar 2021 12:14:16 -0600
From: "Elton A Sanders" <wb5mmb at pobox.com>
To: tacos at amrad.org
Subject: Re: question based on a dim memory and some updates
Message-ID: <3a47c2cd-bdc4-4a70-a7e1-b20426a750b8 at www.fastmail.com>
Content-Type: text/plain

20v Dewalt pack to 12V at say 1-5 amps general field and power outage use. The converter could be the same for most packs ( there are some 60-80 volt packs that might push using common electronics). Plastic would be different for each brand of pack. I don't see it adding more than 1 inch or so to the thickness of the pack ( on the 20v Dewalt packs, the packs with a pillar that sticks up in the tool handle would be bigger).
    Sandy
    WB5MMB

...................Sandy, can I ask for what kind of power tools battery and use case? I see the benefit of the idea, but wonder about all the different kinds of batteries and the battery terminals - requiring a different 'adapter cap' - unless there is a chance the converter PCB can be common to various kinds of terminal adapters (Black & Decker, DeWalt, Ryobi, Stihl, ...) and the applications might be medium duty current load so no loose connections. Also, the mass of a battery holder case could outweigh the advantages of field power conversion. 

Would you consider a battery power converter that comes with a rubber band / Velcro strap to be usable in the field? My guess it would weigh in grams with the safety and power converter electronics ?

It's interesting for me as well, as I see the batteries of my drill machine on the shelf. And a whopping big battery charger for it right next to it.

------------------------------

Message: 4
Date: Mon, 1 Mar 2021 10:23:45 -0800
From: Martin <dcmk1mr2 at gmail.com>
To: Tacos <tacos at amrad.org>
Subject: Tube TV set accidentally transmits audio?
Message-ID:
    <CADyr31rmCihOUHVn6NLrBjpn=+80GGPG9Hju0-P6a40S-J3bXA at mail.gmail.com>
Content-Type: text/plain; charset="utf-8"

I remember hearing about old TV sets that sent audio in the room over RF
during normal TV receiving operation and Google can't seem to find it.

Any recollections? Thanks!

Martin W6MRR
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Message: 5
Date: Mon, 1 Mar 2021 23:41:01 -0500
From: Alex Fraser <beatnic at comcast.net>
To: tacos at amrad.org
Subject: Re: Tube TV set accidentally transmits audio?
Message-ID: <d0ecab40-7dd2-9746-addb-037461999d79 at comcast.net>
Content-Type: text/plain; charset="utf-8"; Format="flowed"

I have memories of people talking about building 6 meter rigs using the 
IF of TV sets.  I think the rotary tuner could be modded to achieve that.

On 3/1/2021 1:23 PM, Martin wrote:
> I remember hearing about old TV sets that sent audio in the room over 
> RF during normal TV receiving operation and Google can't seem to find it.
>
> Any recollections? Thanks!
>
> Martin W6MRR
>
> _______________________________________________
> Tacos mailing list
> Tacos at amrad.org
> https://lists.amrad.org/mailman/listinfo/tacos
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Message: 6
Date: Tue, 2 Mar 2021 00:13:03 -0500 (EST)
From: lstoskopf at cox.net
To: Alex Fraser <beatnic at comcast.net>, tacos at amrad.org
Subject: Re: Tube TV set accidentally transmits audio?
Message-ID: <1073839277.499592.1614661983205 at myemail.cox.net>
Content-Type: text/plain; charset="utf-8"

6 meters and Ch 2 are neighbors.  Just a tweak needed.  I have 3 or 4 of these in a box in the basement:  https://www.radiomuseum.org/r/mallory_inductuner.html

N0UU

> On March 1, 2021 at 11:41 PM Alex Fraser <beatnic at comcast.net> wrote:
> 
> 
>    I have memories of people talking about building 6 meter rigs using the IF of TV sets.  I think the rotary tuner could be modded to achieve that.
> 
>    On 3/1/2021 1:23 PM, Martin wrote:
> 
>        > >        I remember hearing about old TV sets that sent audio in the room over RF during normal TV receiving operation and Google can't seem to find it.  
> > 
> >        Any recollections? Thanks!
> > 
> >        Martin W6MRR
> > 
> > 
> >        _______________________________________________
> >        Tacos mailing list
> >        Tacos at amrad.org mailto:Tacos at amrad.org
> >        https://lists.amrad.org/mailman/listinfo/tacos
> > 
> >    > 

> _______________________________________________
>    Tacos mailing list
>    Tacos at amrad.org
>    https://lists.amrad.org/mailman/listinfo/tacos
> 

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Subject: Digest Footer

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------------------------------

End of Tacos Digest, Vol 216, Issue 2
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