[Hallicrafters] Solid state rectifier and matching 6V6s

[Edward B Richards]

Hi Glen, et al;

The R/S transformer you recommend is the one I use in my voltage reducer
as described on BAMA's home page. It is center tapped and I separate the
two outlets in as duplex outlet so one is connected to the center tap for
6.3 volt reduction, and the other to the end of the winding for 12.6 volt
reduction. This gives one a choice for different line voltages and radio
requirements. I house it in a 4" metal junction box with a matching
cover. This will reduce the voltage without wasting electricity and
heating up your room with a resistive element. It also provides a
constant voltage with different loads. 

I have one assembled and tested for sale at $39.95 including shipping.
Thank you.

73,  Ed  K6UUZ

On Sun, 9 Sep 2007 08:09:06 -0700 (PDT) Glen Zook <gzook at yahoo.com>
writes:
> Considering the cost of copper wire these days using a
> filament transformer in a voltage "bucking" type
> circuit will generally be much cheaper.  Remember that
> the price of copper has gone up over 300% in the past
> year, or so.
> 
> From Mouser 18 gauge "zip" cord runs $342.71 for 1000
> feet (no shorter lengths available).  Part number
> 566-8888-1000-08 (Belden part number 8888).  However,
> no 3rd wire ground is present with such wire and you
> have to provide the ground for safety.
> 
> Radio Shack sells a 3 amp 12.6 volt transformer for
> $10.49 (part number 273-1511) and a 1.2 amp 12.6 volt
> transformer for $8.39 (part number 273-1352).
> 
> Radio Shack is actually one of the cheapest sources of
> such transformers.
> 
> Adding a line cord, a duplex outlet, and some sort of
> project box to put everything in, the cost of a
> bucking arrangement is going to be less than $20 for
> one capable of handling 3 amps (which is plenty for
> virtually all receivers and many of the lower powered
> transmitters).  This compared to $85.68 for 250 feet
> of "zip" cord.
> 
> Since many electric companies try to maintain 125
> volts +/- 2 volts (the "+" side definitely during the
> warmer months with air conditioning load) using a 12.6
> volt "bucking" transformer will drop the line voltage
> to between around 115 and 111 volts depending on just
> how high the line voltage.
> 
> Glen, K9STH
> 
> 
> --- jeremy-ca <km1h at jeremy.mv.com> wrote:
> 
> As I said already, it is simply another option. What
> is better for you may not be for someone else. Thats
> why they made strawberry ice cream.
>  
> Yes the zip cord output varies with the load but the
> load from a radio is constant. It is simple enough to
> calculate the load for 1, 2, 3 or more radios and use
> a compromise length for a nominal 117 for one radio
> and dropping down a bit as others are added. Wire
> resistance and current charts have been in the ARRL
> Handbook for 75 or so years.
> 
> 
> 
> 
> 
> 
> 
> 
> 
> Glen, K9STH
> 
> Website:  http://k9sth.com
> 
> 
>       
>
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