[Heath] HW-10 Power Transformer Testing Questions

Doug & Kathy Davies dkdavies3 at gmail.com
Thu Oct 26 13:50:12 EDT 2017


Yesterday I managed to get all of the power transformer wires disconnected
and ran a continuity test on all of the windings.  The 120vac primary
checked out indicating a very low resistance which, I think, shows it's
fine.

There are two additional primary windings, one for 12 and one for 6 volt
operation that utilize a split-reed, dual-interrupter vibrator.
Resistances between connections for each of these windings all showed very
low (0.5ohm) resistances.  Since I won't be using either 6 or 12 volts for
this rig, values here really don't matter, I don't think :).

The resistance between ends of the secondary winding is 52ohms and between
the end and the center tap it's 26.6ohms so I think the secondary is ok as
well.

I would like to apply power to this transformer to ensure is is indeed
working as it should.  Should I use a Variac/isolation transformer setup to
do this?

The 6 and 12 volt windings require the use of the vibrator so, if this
isn't in the circuit, there should be no interaction, correct?

There is a tap in the 6-volt primary winding that is used to obtain
filament voltage.  I should be able to measure this voltage on the filament
lines once 120vac is applied, correct?

I hope I haven't exceeded my question limit for one post:)

Doug  VE7DRF
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