Fw: Re: [Hallicrafters] Converter for SX-101A?

[manualman at juno.com]

I didn't see this come through the first time, so I'll post it again. If
you all did get it the first time, then I must be working in a fog.
Pete

--------- Forwarded message ----------
From: <manualman at juno.com>
To: hallicrafters at mailman.qth.net
Date: Tue, 5 Feb 2002 03:23:09 -0500
Subject: Re: [Hallicrafters] Converter for SX-101A?

Dave:
As Glen pointed out, the SX-101A's converter position requires an oddball
IF output from a VHF converter. Both Ameco's CB and CN type converters 
have documented procedures in their manuals for making the circuit and
crystal changes in order to work with this particular IF. The most common
IF I found in these converters over the years was 7-11 MHz, 10-14 MHz,
14-18 MHz, and 28-32 MHz (all providing a 4 MHz spread). So most likely,
if you find one these converters, you'll probably have to make the
circuit and crystal changes. The CN circuit changes are trivial (move a
jumper, maybe move a coil winding, move a resistor lead) and change the
crystal. The CB type have less trivial changes but are easily done.

Suggestion: Why don't you just forget you even have a converter position.
Look at the converter dial scale. Each graduation is 50 KHz. On the 10
meter dial scale, each graduation is only 25 KHz. Since the majority of 6
meter AM, CW, and SSB activity is between 50 and 50.5, having 25KHz
between each graduation provides much easier tuning in of stations. Not
great, but a lot easier then 50 KHz between each graduation. Find a
converter with a 28 MHz IF and connect its output to the antenna input
jack of the receiver. Put the receiver bandswitch in the 10 meter
position and you have receive capability from 50 to 52 MHz (28 MHz = 50
MHz ; 30 MHz = 52 MHz). If you would rather not have to manually connect
the IF cable and disconnect the low band antenna cable each time, add
some type of simple switching (toggle, coax, etc.). With this approach,
it's cheaper, tuning in a SSB or CW station is not a frustrating
experience, and if you found a HA-6, you could use it in this manner. I
used this method on my NC-300 for years with an Ameco CN-50 and CN-144.
The NC-300 has the same type of converter position.

Cost: If you're searching at a hamfest, I wouldn't pay anymore than $10
for the Ameco CB-type (uses easy to find tubes) and no more than $15 for
the CN-type (if you need tubes for this one, they're not cheap). Past
ARRL handbooks have circuits for building tube and solid-state VHF
converters and you might check out kits that might be available.
Converters from commercial ham vendors are also available.

Pete, WA2CWA

On Mon, 04 Feb 2002 07:23:00 -0600 Dave Moorman <dmoorman4 at attbi.com>
writes:
> Apparently those did not even work in receive mode with the SX-101A.  
> Wrong
> IF output frequency.  It might be possible to change it by changing 
> crystals
> and re-aligning, but seems a little like overkill.  Ameco apparently 
> made
> some converters which worked with 101As.
> 
> Dave
> 
> > From: manualman at juno.com
> > Date: Sun, 3 Feb 2002 21:48:58 -0500
> > To: hallicrafters at mailman.qth.net
> > Subject: Re: [Hallicrafters] Converter for SX-101A?
> > 
> > Don't recall ever seeing any stand-alone converters but they did 
> market
> > the HA-2 and HA-6 (2 & 6 M) transverters. The transverters had 
> the
> > ability to convert receivers and transmitters to operate on the 2 
> and 6
> > meter bands.
> > 
> > Pete, WA2CWA
> > www.manualman.com has been updated; now with over 8000 manuals 
> listed.
> > 
> > 
> > On Sun, 03 Feb 2002 20:05:09 -0600 Dave Moorman 
> <dmoorman4 at attbi.com>
> > writes:
> >> Just picked up an SX-101A and am wondering if Hallicrafters ever 
> made
> >> a
> >> companion converter for 6 and 2 meters?  There doesn't seem to 
> be
> >> one in
> >> Chuck Dachis's book and not much is showing up on the Web.
> >> 
> >> Any information will be greatly appreciated.
> >> 
> >> Dave   K9SW
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