Not boring, but I disagree.
The VCO across the meter of a SWR meeter, has given that information since
the 60's.  The lower the pitch on reflected power, the lower the reflected
power.
Can you get a didgital output off of a didgital watt meter, that can drive a
synthesizer, or a screen reader?
If accureate PEP readings were available, that would be great!


-----Original Message-----
From: For blind ham radio operators [mailto:[log in to unmask]]
On Behalf Of Tom Fowle
Sent: Sunday, October 11, 2015 10:14 PM
To: [log in to unmask]
Subject: Re: TW-1

Well Ron took care of asking LDG for help. actually most small business
people, and big ones too, are pretty paranoid about their products even
those they never plan to make again.  Darned Lawyers!

However, I shouldn't think it very difficult to reproduce a similar unit, it
mostly depends on who has what connections with what kind of manufacturing
setups.

Should those of us with some experience in trying this task get together,
perhaps in a seperate list, and see what we can thrash out?

As long as nobody has proprietary feelings about sharing work, we might be
able to put together various ideas and maybe even, <gasp!> get something
done?

Here's my thinking on what is actually needed. Skip rest if you're bored!

We don't really need a talking watt meter unless running legal limit and
need to be sure not going overboard.

What is really basically needed is an audible accessible vSWR meter. All you
really need to know is that the rig is seeing an swr that makes it happy.
Even with a manual tuner, that's all you need.


so a simple audio VCO design based on a cheap swr meter with an indication
of 2/1 or less VSWR will do for most purposes.

Look back at April 2013 QST for Bill Gerrey's article showing how to add
such a simple circuit to an MFJ meter.

It's simple, easy to reproduce, cheap in common parts  and does the job.

You'll hate it of course, cause everything just has to talk! <GRIN>

Have I stirred up a hornets nest? Or bored you to delete?
BTW, I believe Rob Santello of Hampods is working on a talking watt meter.


tom Fowle
WA6IVG

On Sun, Oct 11, 2015 at 08:24:58PM -0500, Dr. Ronald E. Milliman wrote:
> Brian, I have one of the TW-1 talking SWR/power meters, and have tried 
> to obtain the schematic from LDG, and they will not provide it to 
> anyone. We have reverse engineered it and are still working on this 
> project. We are investigating several different circuits and options. 
> The most expensive component is the voice module or chip, which can be 
> pretty expensive, depending upon your objectives.
> 
>  
> 
> Ron, K8HSY
> 
> President, Millitronics, Inc.
> 
>  
> 
>  
> 
>  
> 
> -----Original Message-----
> 
> From: For blind ham radio operators 
> [mailto:[log in to unmask]]
> On Behalf Of kd8ase
> 
> Sent: Sunday, October 11, 2015 6:06 PM
> 
> To: [log in to unmask]
> 
> Subject: TW-1
> 
>  
> 
> Hello, all, This question is for anyone who owns the tw-1. I am 
> looking for= a schematic/partslist for this device.
> 
> I am talking to a couple engineer/technician friends and we are going 
> to tr= y reproducing this device.
> 
> TNX, Brian McFadden, KD8ASE
> 
>  
> 
> ---
> 
> This email has been checked for viruses by Avast antivirus software.
> 
> https://www.avast.com/antivirus
> 
>  
> 
>  
> 
> Dr. Ronald E. Milliman
> 
> Retired Professor of Marketing
> 
>  
> 
> President: Millitronics, Inc. (millitronics.biz)
> 
> President: A3 Business Solutions (a3businesssolutions.com)
> 
> President: M&M Properties
> 
> President: South Central Kentucky Council of the Blind (SCKCB.ORG)
> 
>  
> 
>