[Amps] help needed sorting out a tube rectifier circuit

[Karl-Arne Markström]

What you have here is the classic "economy power supply", which is a 
combination of the full wave Graetz bridge circuit, and the center-tap
full-wave rectifier. If you look closely in the power supplies chapter in the 1970's 
ARRL handbooks, it is commonly used for SSB transceiver power supplies.

The full-wave bridge generates the 1500V, and the center-tap generates the 750V.

This circuit is most common with solid-state rectifiers, but can be realized as well with
both vacuum and mercury-vapor rectifiers.

73/

Karl-Arne
SM0AOM



----- Original Message ----- 
From: <chris at yipyap.com>
To: <amps at contesting.com>
Sent: Tuesday, October 04, 2005 5:49 PM
Subject: [Amps] help needed sorting out a tube rectifier circuit


> 
> 
> 
> (kind of AMPS related... you may want to delete if you're
> not into old tube gear)
> 
> I'm back to working on restoration of a big homebrew
> AM/CW rig that I inherited from W6MSC last December.
> 
> I am scratching my head over an auxillary power supply
> circuit.  There are 4 tubes (866 types) 4 transformers,
> and it looks like he's taking HV out of two different
> points in the circuit.
> 
> Here is a rough drawn schematic (as much as I have
> been able to sort out so far).  There are some
> parts in the drawing that are not applicable.
> 
> The question I've got concerns the connections D, E, and F
> between the Aux Power deck and the Rectifier deck.
> It looks like he's taking HV out of both the center tap
> on transformer D-F  and also from the center tap  in
> the rectifier labeled E.  My labels of "1500v" and "750v"
> are estimates based on the circuits they are feeding.
> 
> I don't understand.
> 
> http://www.yipyap.com/radio_stuff/rectifier_query.pdf
> (and yes, I drew my "T1" transformer coils kind of goofy...
> sorry about that.  If I get time today I will work
> on a nicer picture to illustrate my quandry.)
> 
> 
> Any help would be appreciated.
> 
> Chris Howard
> w0ep
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> Amps at contesting.com
> http://lists.contesting.com/mailman/listinfo/amps
> 
> 
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