Home  Resources  References  Tubes  Forums  Links  Support 
Mopar 802 tuning slug problem
4/4/2012 12:54:20 PMDave Froehlich
Hello All,
One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?

Thanks,

Dave

4/4/2012 4:56:05 PMEdd









Sir Dave . . . . .



One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end.



If I am remembering correctly, a tuning powdered iron core is having a centrally encased coiled flexible spring wire that extends out of one core end for an ~ core length distance and then threads into a clip.


See if you can get freedom from being connected into that clip and then just be able to MANUALLY, fingertip work, that problem core from one end of travel limit to the other.


That test should let you detect/feel for any abberation in that slugs friction free freedom of movement.


I'm expecting moisture or a foreign deposit having affected the internal conformal coating inside of the coil form, and that is now binding around its companion internally sliding slug.


That, rather than being a slug diameter problem, since slugs are typically so stable.


If so found, you might then try multiple easy passes of a slightly smaller diameter of rat tail file to open up the internal diameter of the coil form for establishing free loose internal clearance again


Or use a slightly smaller round wooden dowel with a 1/2 of a widths longitudinal strip of wet 'n dry used as the abrasive agent.



Also, stations at the high end are loud and clear.




Logical, no binding at that end and therefore proper RF-Mixer- 0scillator settings are maintained.


Also, the high end of the band should be where the trio of slugs are almost all of the way out of their coil form housings, therefore with the likelyhood of no binding and maintaining optimal tuning alignment.


Stations at the low end of the band are all muffled.



Conversely, the low frequency end of the band should be where the trio of slugs are almost ALL of the way
inserted within their companion coil forms, therefore, then with more surfactal area, giving greater odds of any binding and less free movement of a binding slug.


Now . . . . if that "sluggish" slug . . .happened to be the oscillator slug, that would skew the derived oscillator frequency off from attaining an optimal 262KC ? (right ? not 455) derived IF frequency and producing less than optimumal audio, (like being tuned off, to the edge of a station, rather than zeroed right onto the station).


Also, additionlly resulting , would be less overall sensitivity of reception .



When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down.



This relates back to the very first suggested test , where the slug starts binding and then a sluggish snap back action from the spring shaft, AFTER you then start reversing tuning directions.


I believe that this set has had additional problems in the past . . .right . . ?, but you still wukkin' on its !

73's de Edd



Shot my first turkey yesterday !


( Scared the sh%# outta everyone in the frozen food section. )







:Hello All,
: One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?
:
:Thanks,
:
:Dave
:

4/4/2012 5:17:25 PMDave Froehlich
Edd,
I think I have found the problem. First of all someone replaced the dial cord, but got it backwards. So the pointer moves in the wrong direction. Then the didn't center the dial cord by opening the screws on the speedometer cable like linkage and adjusting the dial cord so the pointer gets to an end of the band at the same time as the tuning slugs, even if it was backwards. The tugging was because the dial was at an end before the tuning slugs or vise versa. I have that straightened out. But I'm not sure I want to replace the dial cord. There are also no muffled stations. I was wrong about that. Replacing the dial cord might be a bit tricky.

Thanks,

Dave
:
:

:
:
:
:
:
:
:
:
:
:
:
:Sir Dave . . . . .
:
:
:
:One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end.
:
:
:
:If I am remembering correctly, a tuning powdered iron core is having a centrally encased coiled flexible spring wire that extends out of one core end for an ~ core length distance and then threads into a clip.
:
:
:See if you can get freedom from being connected into that clip and then just be able to MANUALLY, fingertip work, that problem core from one end of travel limit to the other.
:
:
:That test should let you detect/feel for any abberation in that slugs friction free freedom of movement.
:
:
:I'm expecting moisture or a foreign deposit having affected the internal conformal coating inside of the coil form, and that is now binding around its companion internally sliding slug.
:
:
:That, rather than being a slug diameter problem, since slugs are typically so stable.
:
:
:If so found, you might then try multiple easy passes of a slightly smaller diameter of rat tail file to open up the internal diameter of the coil form for establishing free loose internal clearance again
:
:
:Or use a slightly smaller round wooden dowel with a 1/2 of a widths longitudinal strip of wet 'n dry used as the abrasive agent.
:
:
:
:Also, stations at the high end are loud and clear.
:
:
:
:
:
:
:
:
:Logical, no binding at that end and therefore proper RF-Mixer- 0scillator settings are maintained.
:
:
:Also, the high end of the band should be where the trio of slugs are almost all of the way out of their coil form housings, therefore with the likelyhood of no binding and maintaining optimal tuning alignment.
:
:
:
:
:Stations at the low end of the band are all muffled.
:
:
:
:Conversely, the low frequency end of the band should be where the trio of slugs are almost ALL of the way
:inserted within their companion coil forms, therefore, then with more surfactal area, giving greater odds of any binding and less free movement of a binding slug.
:
:
:Now . . . . if that "sluggish" slug . . .happened to be the oscillator slug, that would skew the derived oscillator frequency off from attaining an optimal 262KC ? (right ? not 455) derived IF frequency and producing less than optimumal audio, (like being tuned off, to the edge of a station, rather than zeroed right onto the station).
:
:
:Also, additionlly resulting , would be less overall sensitivity of reception .
:
:
:
:When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down.
:
:
:
:This relates back to the very first suggested test , where the slug starts binding and then a sluggish snap back action from the spring shaft, AFTER you then start reversing tuning directions.
:
:
:I believe that this set has had additional problems in the past . . .right . . ?, but you still wukkin' on its !
:
:
: 73's de Edd

:
:
:
:
: Shot my first turkey yesterday !
:
:
:( Scared the sh%# outta everyone in the frozen food section. )
:
:
:
:
:
:
:

:
:
:
:
::Hello All,
:: One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?
::
::Thanks,
::
::Dave
::
:
:

4/4/2012 5:17:26 PMDave Froehlich
Edd,
I think I have found the problem. First of all someone replaced the dial cord, but got it backwards. So the pointer moves in the wrong direction. Then the didn't center the dial cord by opening the screws on the speedometer cable like linkage and adjusting the dial cord so the pointer gets to an end of the band at the same time as the tuning slugs, even if it was backwards. The tugging was because the dial was at an end before the tuning slugs or vise versa. I have that straightened out. But I'm not sure I want to replace the dial cord. There are also no muffled stations. I was wrong about that. Replacing the dial cord might be a bit tricky.

Thanks,

Dave
:
:

:
:
:
:
:
:
:
:
:
:
:
:Sir Dave . . . . .
:
:
:
:One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end.
:
:
:
:If I am remembering correctly, a tuning powdered iron core is having a centrally encased coiled flexible spring wire that extends out of one core end for an ~ core length distance and then threads into a clip.
:
:
:See if you can get freedom from being connected into that clip and then just be able to MANUALLY, fingertip work, that problem core from one end of travel limit to the other.
:
:
:That test should let you detect/feel for any abberation in that slugs friction free freedom of movement.
:
:
:I'm expecting moisture or a foreign deposit having affected the internal conformal coating inside of the coil form, and that is now binding around its companion internally sliding slug.
:
:
:That, rather than being a slug diameter problem, since slugs are typically so stable.
:
:
:If so found, you might then try multiple easy passes of a slightly smaller diameter of rat tail file to open up the internal diameter of the coil form for establishing free loose internal clearance again
:
:
:Or use a slightly smaller round wooden dowel with a 1/2 of a widths longitudinal strip of wet 'n dry used as the abrasive agent.
:
:
:
:Also, stations at the high end are loud and clear.
:
:
:
:
:
:
:
:
:Logical, no binding at that end and therefore proper RF-Mixer- 0scillator settings are maintained.
:
:
:Also, the high end of the band should be where the trio of slugs are almost all of the way out of their coil form housings, therefore with the likelyhood of no binding and maintaining optimal tuning alignment.
:
:
:
:
:Stations at the low end of the band are all muffled.
:
:
:
:Conversely, the low frequency end of the band should be where the trio of slugs are almost ALL of the way
:inserted within their companion coil forms, therefore, then with more surfactal area, giving greater odds of any binding and less free movement of a binding slug.
:
:
:Now . . . . if that "sluggish" slug . . .happened to be the oscillator slug, that would skew the derived oscillator frequency off from attaining an optimal 262KC ? (right ? not 455) derived IF frequency and producing less than optimumal audio, (like being tuned off, to the edge of a station, rather than zeroed right onto the station).
:
:
:Also, additionlly resulting , would be less overall sensitivity of reception .
:
:
:
:When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down.
:
:
:
:This relates back to the very first suggested test , where the slug starts binding and then a sluggish snap back action from the spring shaft, AFTER you then start reversing tuning directions.
:
:
:I believe that this set has had additional problems in the past . . .right . . ?, but you still wukkin' on its !
:
:
: 73's de Edd

:
:
:
:
: Shot my first turkey yesterday !
:
:
:( Scared the sh%# outta everyone in the frozen food section. )
:
:
:
:
:
:
:

:
:
:
:
::Hello All,
:: One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?
::
::Thanks,
::
::Dave
::
:
:

4/4/2012 5:17:28 PMDave Froehlich
Edd,
I think I have found the problem. First of all someone replaced the dial cord, but got it backwards. So the pointer moves in the wrong direction. Then the didn't center the dial cord by opening the screws on the speedometer cable like linkage and adjusting the dial cord so the pointer gets to an end of the band at the same time as the tuning slugs, even if it was backwards. The tugging was because the dial was at an end before the tuning slugs or vise versa. I have that straightened out. But I'm not sure I want to replace the dial cord. There are also no muffled stations. I was wrong about that. Replacing the dial cord might be a bit tricky.

Thanks,

Dave
:
:

:
:
:
:
:
:
:
:
:
:
:
:Sir Dave . . . . .
:
:
:
:One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end.
:
:
:
:If I am remembering correctly, a tuning powdered iron core is having a centrally encased coiled flexible spring wire that extends out of one core end for an ~ core length distance and then threads into a clip.
:
:
:See if you can get freedom from being connected into that clip and then just be able to MANUALLY, fingertip work, that problem core from one end of travel limit to the other.
:
:
:That test should let you detect/feel for any abberation in that slugs friction free freedom of movement.
:
:
:I'm expecting moisture or a foreign deposit having affected the internal conformal coating inside of the coil form, and that is now binding around its companion internally sliding slug.
:
:
:That, rather than being a slug diameter problem, since slugs are typically so stable.
:
:
:If so found, you might then try multiple easy passes of a slightly smaller diameter of rat tail file to open up the internal diameter of the coil form for establishing free loose internal clearance again
:
:
:Or use a slightly smaller round wooden dowel with a 1/2 of a widths longitudinal strip of wet 'n dry used as the abrasive agent.
:
:
:
:Also, stations at the high end are loud and clear.
:
:
:
:
:
:
:
:
:Logical, no binding at that end and therefore proper RF-Mixer- 0scillator settings are maintained.
:
:
:Also, the high end of the band should be where the trio of slugs are almost all of the way out of their coil form housings, therefore with the likelyhood of no binding and maintaining optimal tuning alignment.
:
:
:
:
:Stations at the low end of the band are all muffled.
:
:
:
:Conversely, the low frequency end of the band should be where the trio of slugs are almost ALL of the way
:inserted within their companion coil forms, therefore, then with more surfactal area, giving greater odds of any binding and less free movement of a binding slug.
:
:
:Now . . . . if that "sluggish" slug . . .happened to be the oscillator slug, that would skew the derived oscillator frequency off from attaining an optimal 262KC ? (right ? not 455) derived IF frequency and producing less than optimumal audio, (like being tuned off, to the edge of a station, rather than zeroed right onto the station).
:
:
:Also, additionlly resulting , would be less overall sensitivity of reception .
:
:
:
:When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down.
:
:
:
:This relates back to the very first suggested test , where the slug starts binding and then a sluggish snap back action from the spring shaft, AFTER you then start reversing tuning directions.
:
:
:I believe that this set has had additional problems in the past . . .right . . ?, but you still wukkin' on its !
:
:
: 73's de Edd

:
:
:
:
: Shot my first turkey yesterday !
:
:
:( Scared the sh%# outta everyone in the frozen food section. )
:
:
:
:
:
:
:

:
:
:
:
::Hello All,
:: One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?
::
::Thanks,
::
::Dave
::
:
:

4/4/2012 5:17:29 PMDave Froehlich
Edd,
I think I have found the problem. First of all someone replaced the dial cord, but got it backwards. So the pointer moves in the wrong direction. Then the didn't center the dial cord by opening the screws on the speedometer cable like linkage and adjusting the dial cord so the pointer gets to an end of the band at the same time as the tuning slugs, even if it was backwards. The tugging was because the dial was at an end before the tuning slugs or vise versa. I have that straightened out. But I'm not sure I want to replace the dial cord. There are also no muffled stations. I was wrong about that. Replacing the dial cord might be a bit tricky.

Thanks,

Dave
:
:

:
:
:
:
:
:
:
:
:
:
:
:Sir Dave . . . . .
:
:
:
:One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end.
:
:
:
:If I am remembering correctly, a tuning powdered iron core is having a centrally encased coiled flexible spring wire that extends out of one core end for an ~ core length distance and then threads into a clip.
:
:
:See if you can get freedom from being connected into that clip and then just be able to MANUALLY, fingertip work, that problem core from one end of travel limit to the other.
:
:
:That test should let you detect/feel for any abberation in that slugs friction free freedom of movement.
:
:
:I'm expecting moisture or a foreign deposit having affected the internal conformal coating inside of the coil form, and that is now binding around its companion internally sliding slug.
:
:
:That, rather than being a slug diameter problem, since slugs are typically so stable.
:
:
:If so found, you might then try multiple easy passes of a slightly smaller diameter of rat tail file to open up the internal diameter of the coil form for establishing free loose internal clearance again
:
:
:Or use a slightly smaller round wooden dowel with a 1/2 of a widths longitudinal strip of wet 'n dry used as the abrasive agent.
:
:
:
:Also, stations at the high end are loud and clear.
:
:
:
:
:
:
:
:
:Logical, no binding at that end and therefore proper RF-Mixer- 0scillator settings are maintained.
:
:
:Also, the high end of the band should be where the trio of slugs are almost all of the way out of their coil form housings, therefore with the likelyhood of no binding and maintaining optimal tuning alignment.
:
:
:
:
:Stations at the low end of the band are all muffled.
:
:
:
:Conversely, the low frequency end of the band should be where the trio of slugs are almost ALL of the way
:inserted within their companion coil forms, therefore, then with more surfactal area, giving greater odds of any binding and less free movement of a binding slug.
:
:
:Now . . . . if that "sluggish" slug . . .happened to be the oscillator slug, that would skew the derived oscillator frequency off from attaining an optimal 262KC ? (right ? not 455) derived IF frequency and producing less than optimumal audio, (like being tuned off, to the edge of a station, rather than zeroed right onto the station).
:
:
:Also, additionlly resulting , would be less overall sensitivity of reception .
:
:
:
:When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down.
:
:
:
:This relates back to the very first suggested test , where the slug starts binding and then a sluggish snap back action from the spring shaft, AFTER you then start reversing tuning directions.
:
:
:I believe that this set has had additional problems in the past . . .right . . ?, but you still wukkin' on its !
:
:
: 73's de Edd

:
:
:
:
: Shot my first turkey yesterday !
:
:
:( Scared the sh%# outta everyone in the frozen food section. )
:
:
:
:
:
:
:

:
:
:
:
::Hello All,
:: One of the tuning slugs isn't going in straight and seems to be rubbing on the inside of the coil on the high end. Also, stations at the high end are loud and clear. Stations at the low end of the band are all muffled. When the tuning is turned all the way up the coil tries to push out. It pushes the clip out and then gets hung up and tries to pull it in on the way down. What's going on and how can I fix it?
::
::Thanks,
::
::Dave
::
:
:



© 1989-2025, Nostalgia Air