having trouble with this, and have the brief instructs from io.com,
which i think are from the hro 50 instructs. have removed two set
screws which are accessed thru a hole in the black knob part of the
dial. turn the dial to 250, and have some play -- it moves back and
forth on the shaft for about 1/16" of an inch but does not come off.
reluctant of course to pull hard. there does not *seem* to be a catch
or some way to release from the back side, nor any other screws.

this is a somewhat unusual set of about nc-100 vintage (1939-41-
ishmade for precursor to FAA). has the sliding coil tank, and
receives usual shortwave bands plus an old airband. knob is black,
dial is grey. can't get the faceplate off for redo until dial knob
removed.

have original docs, but instructs for this not given there. bama, etc
no go for further docs on this unit.
ab.

Alpha Bravo,

Your not going to like the answer....

There should only be the two screws ( one screw on earlier HRO dials )
and the knob should slide off.

I had fits removing one a couple of years ago. I tried copious amounts of
thread lubricant and gentle twisting and tugging.

The end result was surgery - I had to crefully cut the bakelite knob
around the shaft to remove the pieces from around the shaft.

I found another HRO knob on Ebay for $15. The original skirt was left
intact and OK.

I also have a modified NC-100 for the Dept of Commerce. Fun little radio.

L Ron H


"ablebravo" wrote in message
ups.com...
having trouble with this, and have the brief instructs from io.com,
which i think are from the hro 50 instructs. have removed two set
screws which are accessed thru a hole in the black knob part of the
dial. turn the dial to 250, and have some play -- it moves back and
forth on the shaft for about 1/16" of an inch but does not come off.
reluctant of course to pull hard. there does not *seem* to be a catch
or some way to release from the back side, nor any other screws.

this is a somewhat unusual set of about nc-100 vintage (1939-41-
ishmade for precursor to FAA). has the sliding coil tank, and
receives usual shortwave bands plus an old airband. knob is black,
dial is grey. can't get the faceplate off for redo until dial knob
removed.

have original docs, but instructs for this not given there. bama, etc
no go for further docs on this unit.
ab.

Dianetics anyone?

L Ron Hubbub wrote:

Alpha Bravo,

Your not going to like the answer....

There should only be the two screws ( one screw on earlier HRO dials )
and the knob should slide off.

I had fits removing one a couple of years ago. I tried copious amounts of
thread lubricant and gentle twisting and tugging.

The end result was surgery - I had to crefully cut the bakelite knob
around the shaft to remove the pieces from around the shaft.

I found another HRO knob on Ebay for $15. The original skirt was left
intact and OK.

I also have a modified NC-100 for the Dept of Commerce. Fun little radio.

L Ron H


"ablebravo" wrote in message
ups.com...

having trouble with this, and have the brief instructs from io.com,
which i think are from the hro 50 instructs. have removed two set
screws which are accessed thru a hole in the black knob part of the
dial. turn the dial to 250, and have some play -- it moves back and
forth on the shaft for about 1/16" of an inch but does not come off.
reluctant of course to pull hard. there does not *seem* to be a catch
or some way to release from the back side, nor any other screws.

this is a somewhat unusual set of about nc-100 vintage (1939-41-
ishmade for precursor to FAA). has the sliding coil tank, and
receives usual shortwave bands plus an old airband. knob is black,
dial is grey. can't get the faceplate off for redo until dial knob
removed.

have original docs, but instructs for this not given there. bama, etc
no go for further docs on this unit.
ab.

On Wed, 28 Mar 2007 14:51:44 -0400, Dave wrote in :

L Ron Hubbub wrote:

"ablebravo" wrote in message
ups.com...

having trouble with this, and have the brief instructs from io.com,
which i think are from the hro 50 instructs. have removed two set
screws which are accessed thru a hole in the black knob part of the
dial. turn the dial to 250, and have some play -- it moves back and
forth on the shaft for about 1/16" of an inch but does not come off.
reluctant of course to pull hard. there does not *seem* to be a catch
or some way to release from the back side, nor any other screws.

this is a somewhat unusual set of about nc-100 vintage (1939-41-
ishmade for precursor to FAA). has the sliding coil tank, and
receives usual shortwave bands plus an old airband. knob is black,
dial is grey. can't get the faceplate off for redo until dial knob
removed.

have original docs, but instructs for this not given there. bama, etc
no go for further docs on this unit.
ab.

Alpha Bravo,

Your not going to like the answer....

There should only be the two screws ( one screw on earlier HRO dials )
and the knob should slide off.

I had fits removing one a couple of years ago. I tried copious amounts of
thread lubricant and gentle twisting and tugging.

The end result was surgery - I had to crefully cut the bakelite knob
around the shaft to remove the pieces from around the shaft.

I found another HRO knob on Ebay for $15. The original skirt was left
intact and OK.

I also have a modified NC-100 for the Dept of Commerce. Fun little radio.

L Ron H

Dianetics anyone?

The bill to get the coffee out of my pants and keyboard is $27.62; I
won't charge you for cleaning the monitor screen, which needed it, but
coffee really isn't a recommended cleaning agent.

Has anyone ever tried *CAREFULLY* drilling a hole dead-center in the
knob, and then using a gear puller to get the knob moving on the
shaft? I realize that it risks damaging the skirt, if there is one,
but at this point you're already at risk of having to cut the knob off
the shaft anyway, and the additional risk of damaging the knob doesn't
seem to be all that great -- to me, anyway; YMMV.

--
Mike Andrews, W5EGO

Tired old sysadmin

The skirt is actually the valuable piece if it is in good condition
The knob can be found through the usual sources.
Trust me, I thought about the gear puller. But it would cause more damage
than it helps

L Ron H


"Mike Andrews" wrote in message
...
On Wed, 28 Mar 2007 14:51:44 -0400, Dave wrote in
:

L Ron Hubbub wrote:

"ablebravo" wrote in message
ups.com...

having trouble with this, and have the brief instructs from io.com,
which i think are from the hro 50 instructs. have removed two set
screws which are accessed thru a hole in the black knob part of the
dial. turn the dial to 250, and have some play -- it moves back and
forth on the shaft for about 1/16" of an inch but does not come off.
reluctant of course to pull hard. there does not *seem* to be a catch
or some way to release from the back side, nor any other screws.

this is a somewhat unusual set of about nc-100 vintage (1939-41-
ishmade for precursor to FAA). has the sliding coil tank, and
receives usual shortwave bands plus an old airband. knob is black,
dial is grey. can't get the faceplate off for redo until dial knob
removed.

have original docs, but instructs for this not given there. bama, etc
no go for further docs on this unit.
ab.

Alpha Bravo,

Your not going to like the answer....

There should only be the two screws ( one screw on earlier HRO
dials )
and the knob should slide off.

I had fits removing one a couple of years ago. I tried copious
amounts of
thread lubricant and gentle twisting and tugging.

The end result was surgery - I had to crefully cut the bakelite knob
around the shaft to remove the pieces from around the shaft.

I found another HRO knob on Ebay for $15. The original skirt was
left
intact and OK.

I also have a modified NC-100 for the Dept of Commerce. Fun little
radio.

L Ron H

Dianetics anyone?

The bill to get the coffee out of my pants and keyboard is $27.62; I
won't charge you for cleaning the monitor screen, which needed it, but
coffee really isn't a recommended cleaning agent.

Has anyone ever tried *CAREFULLY* drilling a hole dead-center in the
knob, and then using a gear puller to get the knob moving on the
shaft? I realize that it risks damaging the skirt, if there is one,
but at this point you're already at risk of having to cut the knob off
the shaft anyway, and the additional risk of damaging the knob doesn't
seem to be all that great -- to me, anyway; YMMV.

--
Mike Andrews, W5EGO

Tired old sysadmin

yeah, thought about the gearpuller. i can't really see what's holding
it on, but it does seem to be a problem w.the shaft. a guess is it
has been cut up by one of the screws perhaps leaving a ridge or
something stopping assembly from sliding off.

the assembly moves just fine and isn't frozen -- just won't move all
the way off, or even very far outboard.

thanks for all suggests.

well, i know how to do this now and save the knob. you remove the
transmission cap covering the tuning gears. with this out of the
way, there is room to then access the back of the dialknob w/long
shanked thin blade screwdriver. the hole in the faceplate is big
enough to reveal the ports in the back of the dial knob assbly. the
screws holding the black knob to the skirt will appear in little
'windows' as the dial is rotated. remove as they appear until all 3
are out, and black knob will come off. a magnet helps w/retrieval.
you now have access to the front of the shaft.

instead of trying to wiggle or add solvents from the front, i took a
flat tipped punch and very gently tapped on the back of the dial,
which since the transmission cap is off, you can now also see/access.
tapping was on the thick buching part of of the dial, right at the
shaft. knob pops right off. you could work carefully tapping around
the knob base while rotating the shaft i guess, if it was stuck badly.

i think it was stiction holding it -- shaft goo was completely liquid
and there were no dings on the shaft. yet knob wouldn't just slip
off.

ab