Re: Possible FS - HRO Sixty

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From: Brad Thompson (Brad.Thompson@valley.net)
Date: Tue Jun 10 2003 - 11:05:09 CDT


At 10:55 AM 06/10/2003 -0400, Mike Yetsko wrote:
>A friend of mine has an old radio he wants to get rid of. I personally
>do not know the condition, but will be checking it out in a few days.
>
>It's an HRO Sixty.
>
>I don't know about original manuals, but I do know that he has numerous
>modules that 'plug in' to the drawer you pull out.
>
>So, first question... What's something like this worth? Go to EBAY?
>Or is there interest here?
>
>Mike
>N1DVJ

Hi--

The HRO-60 is arguably one of the better vacuum-tube receivers for amateur
radio service,
circa the late 1950s- early 1960s. The "modules" are coil sets-- four (A,
B, C, and D) cover the
amateur and short-wave bands, while accessory coil sets cover from VLF to
six meters. Separate
plastic dial scales accompany (or should accompany) the accessory coil sets.

The basic coil sets feature individual bandwidth "switches"-- small tabs
that you reposition to
cover the bandspread sections provided in the coils sets.

Mechanically speaking, the radio is well built, with a very nice
vernier-tuning system that
was a National Radio trademark. There are at least two internal accessory
plug-ins: a crystal
calibrator (fixed markers) and a NBFM adaptor. Also, you'll need an
external loudspeaker,
and National offered a matching speaker.

As for value, well... that depends on a multitude of factors, but it's
probably not a $50 radio
unless it's been swimming<g>. Chances are, it would sell for anywhere from
$200 to $600 depending
on condition and the absence of modifications. The accessory coil sets are
uncommon and somewhat
valuable to other HRO-60 owners, but the radio is more valuable as a
complete (or near-complete)
package.

As with all older vacuum-tube radios, you need to practice safe
power-application techniques. If you
haven't already done so, DON'T plug the radio in and power it up from a
cold start after years in
storage. You can cause a lot of damage and potentially expose yourself to a
shock hazard if
an AC line-to-chassis bypass capacitor has short-circuited. If a filter
capacitor has shorted, you
may fry the rectifier tube and power transformer.

If you're unfamiliar with old-radio restoration techniques, do some
research-- you and the radio will be
better off.

To restore the radio, you may have to replace the filter capacitors and any
leaking paper capacitors
or cooked resistors. Tubes are relatively easy to find, with the exception
of the ballast-resistor tube
that's used to stabilize the local-oscillator heater (although a 6V6 is
supposedly a plug-in substitute).
If a previous owner was a smoker, the cabinet and knobs will need cleaning.

Keep in mind that the HRO is a very heavy beast and will tax your packaging
ability if you ship it
to a purchaser. You'll need to remove the coil sets and package each one
very carefully to
prevent breakage.

I owned an HRO-60 and liked it, but sold it to buy a Drake R-8, and I'm not
sorry that I did--
the HRO was a fine radio, but it took up a lot of operating-table space.

73--
Brad AA1IP


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