Tim Shoppa wrote:

If you find a hi-fi or 70.7V PA transformer that's great....

What does 70.7v mean?


My question for you: what kind of modulation transformer do you use to
drive the plate for the 8000? I'm jealous that you apparently had one
just sitting around :-).

No such luck but I did find someone else by trolling who did. It's a
UTC SS22 and about right for the job but I would feel more comfortable
with something a little bigger.

I only need about 200W of audio but I would like to run it at 2000 volts
to get legal limit out of the final but I am a little reluctant to push
the mod trans. I am currently running at 1600V and everything is happy.

JACK K9ACT


--
PHOTO OF THE WEEK: http://schmidling.com/pow.htm
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Jack Schmidling wrote:

Tim Shoppa wrote:

If you find a hi-fi or 70.7V PA transformer that's great....


What does 70.7v mean?


It is a standard method of distributing multiple PA or music speakers
from an audio amplifier. If you start out with a 100 watt amp with a 100
watt/70 V audio output transformer you can run small gauge wire to the
remote speakers. At each remote speaker a 70 V transformer steps down to
the speaker impedance by way of a tap corresponding to the power you
want delivered to the speaker. If you have 10 speakers, use the 10 watt
taps etc.

--
Joe Leikhim K4SAT
"The RFI-EMI-GUY"©

"Treason doth never prosper: what's the reason?
For if it prosper, none dare call it treason."

"Follow The Money" ;-P

On Sat, 10 Mar 2007 00:46:14 -0500, **THE-RFI-EMI-GUY**
wrote:

Jack Schmidling wrote:

Tim Shoppa wrote:

If you find a hi-fi or 70.7V PA transformer that's great....


What does 70.7v mean?


It is a standard method of distributing multiple PA or music speakers
from an audio amplifier. If you start out with a 100 watt amp with a 100
watt/70 V audio output transformer you can run small gauge wire to the
remote speakers. At each remote speaker a 70 V transformer steps down to
the speaker impedance by way of a tap corresponding to the power you
want delivered to the speaker. If you have 10 speakers, use the 10 watt
taps etc.

That must be some kind if americanism, since I have only heard about
100 V lines, for distributing audio power at a reasonable level around
a large house,

Paul OH3LWR