This is what I know.

The powercord on both my SB-303 and SX-100 is made by Victor. Both
are marked 7A 125V. Both have the Victor name and the V in a diamond
logo. These are three wire cords.

There is a current production cord that looks like it but is
different. The pin spacing is different. The pins are in a different
geometry to the oval shell.

There is a fellow selling Heathkit SB cords on eBay. He has two wire
cords, not three.

There was a rumor that Singer Sewing machine dealers carry the cord.
I have checked with two local sewing machine repair depots. They
don't recognize the cord.

I have looked up replacement cords in the "Brewers" catalog. Brewers
is a wholesale supplier to the sewing industry. Their catalog lists
many different sewing machine cords but nothing that looks like this.

There is a dealer in Georgia who shows a cord that resembles
the SX-100 cord on their website. Nice folk, good to deal with but
the cord they carry is much larger and will not fit the SX-100 or
SB-303/313.

Someone told me that the local TV/Radio parts wholesale outlet had
bins of the powercord. Well, maybe 20 years ago when they also sold
Ham Radio equipment. They only stock useless LAN wiring and such now.

A fellow told me that the cord was used on professional Video
equipment. I haven't followed this one up but it seems reasonable.


-- Laptop Cord Mod --

A three round pin laptop cord can be force fit to work in the
SX-100. There is an issue as to whether the pin-out, hot, neutral,
and ground, is the same. I have not checked this. Caution advised!

I made it fit by cutting the plastic of the pins apart with a hacksaw.
Bend your hand to point your fingertips at you. Touch your thumb to
your little finger. You're making something that looks like that.


-- IEC retrofit --

The alternative, retrofitting an IEC socket, is not viable for a
collectable boatanchor like an SX-100 or SB-303/313.

For vintage test equipment, well, maybe. I don't know if there is a
collector's market for vintage test equipment.

It does not look like an IEC socket will fit without cutting the
chassis.


-- SX-100 pricing --

I've been watching the sales on the Bay. Seems that better examples
are going for just over $1,000. While this seems high, the SX-100 was
over $300 in 1960. That was a lot of money.

A prized collectable anything from that era should be priced even
higher.

The question is whether the SX-100 and other antique radios follow the
pricing model of, say, consumer electronics and become worthless as
newer, better products come on the market.

Or do they follow the model of collectable antiques.

If the SX-100 is a desirable piece, similar to a ceramic treetrunk
vase or a hideous lamp (items commonly seen listed for thousands of
dollars in the antique shoppes), then the price is low.

Given the possible future value, I would not modify the SX-100
chassis.

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de ah6gi/4