Amplifier A7

[Jack Crenshaw]

Murray, the easiest way to measure "impedance" is with a good ol' standard
VOM.  The impedance of a speaker has both a resistive and inductive
component, but it's only the resistive that matters.  The A7 will drive 4,
8, and 16 ohm speakers, but its best performance will be with an old 16-ohm
one.  Remember, there's not much power there (6 watts), so the speaker must
be efficient.

Do you have a manual?  I can send you a copy if you like.

Jack


----- Original Message -----
From: Murray Grandy <mgrandy at TELUS.NET>
To: <HEATH at LISTSERV.TEMPE.GOV>
Sent: Saturday, September 22, 2001 12:49 AM
Subject: Amplifier A7


> I have parts of Heathkit A7 Amp. It looks like a kit that someone started
> and did not complete. I have the chassis, power xfmr, audio xfmr 3
controls
> and 3 knobs. Anyone interested in this. Also, can someone please answer a
> question. What type of equipment is used to measure impedance of say a
loud
> speaker. Seems all the bridges I see measure only L C and R.
> This is perhaps a silly question so, please don't any of you fall off your
> emails laughing.
> Murray.
>
>
>
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