A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

wg2a posted:
A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

I have only a wild guess. Any 2M converter I ever diddled with, converted to
10M. You might try testing it to 28 - 30 MHz and see what happens. My guess
is that it might tune 145 - 147 MHz.

Don

Dbowey ) writes:
wg2a posted:
A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

I have only a wild guess. Any 2M converter I ever diddled with, converted to
10M. You might try testing it to 28 - 30 MHz and see what happens. My guess
is that it might tune 145 - 147 MHz.

Don

It was pretty common to convert to 14MHz also, and I might tip things in
favor of 20 meter output being more common, at least for much of the tube
era.

But matching converters were not all that common. Usually, one bought a
converter from a third party, that often specialized in converters. At
least until SSB came along, at which point some manufacturers added
transverters to their lines. Hallicrafters had such a thing, in
the form of the HA-6 (six meter transverter) and the HA-2 (for two
meters). I can't quite place Hallicrafters making receiver converters,
but then at the moment I can't even place the SX-101 (but if a year
was offered up, I'd check some old magazines).

The on receiver from that era that had matching converters was the
National NC300 and/or NC303. It had a an extra dial for converters, and
it actually tuned an extra 4 MHz, 30 to 34 or so if I recall properly.
The oddball IF range almost required that National sell converters to
go with the receiver.

Michael VE2BVW

Problem is, I don't have an SX-101MK3 anymore, so there's nothing to
hook this up to, not to mention the fact that the tubes are missing, so I
suspect it has a problem.
Hallicrafters ads state that 6 & 2 meter converters (not transverters,
so the HA-2 isn't it) are available & the dial is calibrated for these
bands. Other than that, I can't as yet find any info.

Chuck WG2A

"Dbowey" wrote in message
...
wg2a posted:
A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but
sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model
number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

I have only a wild guess. Any 2M converter I ever diddled with, converted
to
10M. You might try testing it to 28 - 30 MHz and see what happens. My
guess
is that it might tune 145 - 147 MHz.

Don

"Chas" ) writes:
Problem is, I don't have an SX-101MK3 anymore, so there's nothing to
hook this up to, not to mention the fact that the tubes are missing, so I
suspect it has a problem.
Hallicrafters ads state that 6 & 2 meter converters (not transverters,
so the HA-2 isn't it) are available & the dial is calibrated for these
bands. Other than that, I can't as yet find any info.

Chuck WG2A

Did the receiver have much of a lifespan? I just checked my QSTs and
CQs from around that time (admittedly the collection is incomplete), and
I found no ads for it. A lot of trasmitter ads, the other receivers
got full ads, but about the only thing I found was in the April 1959
issue of CQ, where it's shown as part of a station, with no details.
I did find an ad for the SX100, but I have no idea how close it was
in design to the SX101, and certainly no word on converters.

From a fairly small image of the SX101, it looks like there are only
six bands? At least I can only count six levels on the sliderule dial.
That sure does not suggest a special band for the converters.

Of note, the ads for the HA6 and HA2 mention a 10 meter IF, so perhaps
that is a good guess for the Hallicrafter converter, if it is indeed
made by Hallicrafters.

It should be easy to check. Look at the crystal frequency. A 43.333MHz
crystal was common for a 2meter converter that converted to 14MHz.
I'm less certain of what the common frequency for 28MHz IFs were,
but maybe 58MHz or 38.666MHz. A 116MHz mixer injection was pretty
much standard for a 10meter IF, so the crystal would usually be half
or a third of that frequency.

Michael VE2BVW


"Dbowey" wrote in message
...
wg2a posted:
A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but
sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model
number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

I have only a wild guess. Any 2M converter I ever diddled with, converted
to
10M. You might try testing it to 28 - 30 MHz and see what happens. My
guess
is that it might tune 145 - 147 MHz.

Don

On Thu, 8 Jan 2004 06:53:02 UTC, (Michael
Black) wrote:

But matching converters were not all that common. Usually, one bought a
converter from a third party, that often specialized in converters. At
least until SSB came along, at which point some manufacturers added
transverters to their lines. Hallicrafters had such a thing, in
the form of the HA-6 (six meter transverter) and the HA-2 (for two
meters). I can't quite place Hallicrafters making receiver converters,
but then at the moment I can't even place the SX-101 (but if a year
was offered up, I'd check some old magazines).

The SX-101 was in all the magazine ads. There was a marketing
campaign such as the world has not seen since. Well, maybe
Brittney Spears comes close.


The on receiver from that era that had matching converters was the
National NC300 and/or NC303. It had a an extra dial for converters, and
it actually tuned an extra 4 MHz, 30 to 34 or so if I recall properly.
The oddball IF range almost required that National sell converters to
go with the receiver.

I think Hallicrafters worked the same way. 30-34. Nothing oddball
about it. As most receivers covered 28-30, it was an crystal swap
to get it working with anything.


Michael VE2BVW



--

According to Fred Osterman in his book "Shortwave Receivers past and
present", SX-101s & following models were produced from 1956 to 1963. In the
description, he says that the dial is precalibrated for a 2 or 6 meter
converter on the later "A" variant only. It had a freq range of 10-80 meters
plus 30-34mhz.

Chuck WG2A

"Michael Black" wrote in message
...
"Chas" ) writes:
Problem is, I don't have an SX-101MK3 anymore, so there's nothing to
hook this up to, not to mention the fact that the tubes are missing, so
I
suspect it has a problem.
Hallicrafters ads state that 6 & 2 meter converters (not
transverters,
so the HA-2 isn't it) are available & the dial is calibrated for these
bands. Other than that, I can't as yet find any info.

Chuck WG2A

Did the receiver have much of a lifespan? I just checked my QSTs and
CQs from around that time (admittedly the collection is incomplete), and
I found no ads for it. A lot of trasmitter ads, the other receivers
got full ads, but about the only thing I found was in the April 1959
issue of CQ, where it's shown as part of a station, with no details.
I did find an ad for the SX100, but I have no idea how close it was
in design to the SX101, and certainly no word on converters.

From a fairly small image of the SX101, it looks like there are only
six bands? At least I can only count six levels on the sliderule dial.
That sure does not suggest a special band for the converters.

Of note, the ads for the HA6 and HA2 mention a 10 meter IF, so perhaps
that is a good guess for the Hallicrafter converter, if it is indeed
made by Hallicrafters.

It should be easy to check. Look at the crystal frequency. A 43.333MHz
crystal was common for a 2meter converter that converted to 14MHz.
I'm less certain of what the common frequency for 28MHz IFs were,
but maybe 58MHz or 38.666MHz. A 116MHz mixer injection was pretty
much standard for a 10meter IF, so the crystal would usually be half
or a third of that frequency.

Michael VE2BVW


"Dbowey" wrote in message
...
wg2a posted:
A few years back, a friend gave me something he identified as the 2
meter converter for an SX-101 MK3. At that time I owned an SX-101, but
sold
it two years ago, so guess what surfaced recently. I can't find ANY
documentation about this (except that it existed), not even a model
number.
Anybody have some info or even a pic? Thanks!

Chuck WG2A

I have only a wild guess. Any 2M converter I ever diddled with,
converted
to
10M. You might try testing it to 28 - 30 MHz and see what happens. My
guess
is that it might tune 145 - 147 MHz.

Don