[Amps] Transformer i.d.

[Martin Sole]

Glen,

I have ECA transformers in my Henry amplifier, not sure if Alpha used them
also. The plate transformer I have is an ECA1171 but the configuration
sounds almost identical. Like you I had to figure out the primary
connections which I did using an audio generator at 60Hz and a scope. Then I
applied 6 volts from a heater transformer to confirm the findings. Was dead
simple.

I think you have the terminals wrong way round though 6, 7, and 8 are likely
the centre tapped HT secondary and 1 through 5 the adjustable primary. On
the ECA1171 the terminals would seem to be 1= 10v, 2= 0v, 3= 210v, 4= 230v.
There are only 4 terminals on the 1171 not 5 as you have on the 1028.

Never found any information on ECA so I guess they are long gone.

Regards
Martin, HS0ZED


-----Original Message-----
From: amps-bounces at contesting.com [mailto:amps-bounces at contesting.com] On
Behalf Of Glen Zook
Sent: 06 April 2011 07:15
To: amps at contesting.com
Subject: [Amps] Transformer i.d.

I now have a transformer that is reportedly rated at 3000 volts at 1 amp.

The transformer is supposedly from either a Henry or Alpha amplifier.  It
weighs about 70 pounds.  The nomenclature is as follows:

Elect Corp of America
South Gate
p/n ECA 1028

Unfortunately, there is no other information on the transformer such as
which terminal is which tap on the secondary.  The primary terminals are
obvious, they are completely different from the terminals on the secondary.
The primary terminals are numbered 6, 7, and 8.  These are very large solder
terminals.

The secondary terminals are numbered 1, 2, 3, 4, and 5.  These are machine
screw studs mounted on an insulating material.  What I really need to know
is how these 5 terminals are configured.  I sincerely don't want to have to
apply voltage and then measure the voltage.

Anyone have some information on this particular transformer?

Glen, K9STH

Website:  http://k9sth.com
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