Hi Larry,
Why would you want 4 x 3-500Zs? Two will do max legal power nicely...
73, DX, de
Pat, AA6EG/N6IJ;
aa6eg@hh.tmx.com;n6ij@hotmail.com
599 DX Drive, Marina CA 93933
See us on the web: www.polkinghorn.org/n6ij
"The Contest Station from the Government"
On Sun, 3 Oct 1999, Larry Molitor wrote:
>
> At 11:39 AM 10/3/99 -0500, you wrote:
> >
> >About:
> >
> >"I am building an amp with four 3-500Z using low bands only (160 and
> >80m).
> >I do have two filament transformers, 5V/80A w/o a center tap on the
> >secondary coil. The other one contains four coils with 5V/25A ea. coil
> >also
> >w/o any center taps on the secondary side." (Etc.)
> >
> >How about connecting a small "audio" or "power supply" choke from each
> >side of the secondary to "eventual" ground? Calculate the inductance
> >value of them so that they will only allow a negligible (AC) current
> >flow to ground while maintaining a balanced condition for all voltages
> >involved in the circuits. I think reasonable sized, cheap chokes may be
> >possible but must have low DC resistances. Maybe from junk box.
> >
> >73, Roy K6XK
>
> I use a small filament transformer with a secondary center tap. Connect the
> secondary across the big transformer secondary. Leave the primary open. Use
> the small transformer secondary center tap for your cathode return.
>
>
>
> 73,
>
> Larry - W7IUV
> w7iuv@arrl.net
> http://www.axtek.com/w7iuv
> Amp pix at http://207.108.137.61
>
>
>
> --
> FAQ on WWW: http://www.contesting.com/ampsfaq.html
> Submissions: amps@contesting.com
> Administrative requests: amps-REQUEST@contesting.com
> Problems: owner-amps@contesting.com
> Search: http://www.contesting.com/km9p/search.htm
>
--
FAQ on WWW: http://www.contesting.com/ampsfaq.html
Submissions: amps@contesting.com
Administrative requests: amps-REQUEST@contesting.com
Problems: owner-amps@contesting.com
Search: http://www.contesting.com/km9p/search.htm
|