Five Gang Cap
 

I have a large 5 gang variable cap with anti-backlash gear and worm
drive, does anyone know what radio it comes from? You can see a pic
he http://www.radiowymsey.org/IMG_0003.JPG

The cap is approx 6 x 3 x 2 inches

Thanks,


Charlie.


--
M0WYM
www.radiowymsey.org

Sales @ radiowymsey
http://shop.ebay.co.uk/gnome7763/m.html?

Five Gang Cap
 

"M0WYM" wrote in message
...
I have a large 5 gang variable cap with anti-backlash gear and worm drive,
does anyone know what radio it comes from? You can see a pic he
http://www.radiowymsey.org/IMG_0003.JPG

The cap is approx 6 x 3 x 2 inches

Thanks,


Charlie.

Quick answer, I don't know. However there are clues here that could help
someone with a better memory than me.

1. 5 gang variables were common in superhet receivers with two
RF stages. Mostly military, and mostly aircraft.
2. Looks like the tuning drive adapter is for a remote control cable.

BC-348/224's had 5 gang variables, I believe, as did the BC-312.
however those had a direct drive, 1/4" shaft from the worm drive, not
a remote cable adapter.

Sorry to waste bandwidth here, but I don't know.

Old Chief Lynn, W7LTQ

Five Gang Cap
 

On Jul 9, 5:16*pm, M0WYM wrote:
I have a large 5 gang variable cap with anti-backlash gear and worm
drive, does anyone know what radio it comes from? You can see a pic
hehttp://www.radiowymsey.org/IMG_0003.JPG

The cap is approx 6 x 3 x 2 inches

Thanks,

Charlie.

--
M0WYMwww.radiowymsey.org

Sales @ radiowymseyhttp://shop.ebay.co.uk/gnome7763/m.html?

Probably from a SCR-269 (BC-433) or ARN-7 Radio Compass. Loop, 2 RF,
Oscillator and Mixer tuning.

John Mackesy VK3XAO

Five Gang Cap
 

On 10/07/10 08:18, VK3XAO wrote:


Probably from a SCR-269 (BC-433) or ARN-7 Radio Compass. Loop, 2 RF,
Oscillator and Mixer tuning.

John Mackesy VK3XAO

John,

Thank you very much for that! I will investigate further.


Charlie.

--
M0WYM
www.radiowymsey.org

Sales @ radiowymsey
http://shop.ebay.co.uk/gnome7763/m.html?

Five Gang Cap
 

On 07/10/2010 03:18 AM, VK3XAO wrote:
On Jul 9, 5:16 pm, wrote:
I have a large 5 gang variable cap with anti-backlash gear and worm
drive, does anyone know what radio it comes from? You can see a pic
hehttp://www.radiowymsey.org/IMG_0003.JPG

The cap is approx 6 x 3 x 2 inches

Thanks,

Charlie.

--
M0WYMwww.radiowymsey.org

Sales @ radiowymseyhttp://shop.ebay.co.uk/gnome7763/m.html?

Probably from a SCR-269 (BC-433) or ARN-7 Radio Compass. Loop, 2 RF,
Oscillator and Mixer tuning.

John Mackesy VK3XAO
The capacitor has a second gear driving a sliding rod, probably used to
move a dial pointer (see the two gears below the worm gear?). I suspect
the radio was tuned via a motor connected via a spline to the worm drive
and the moving rod was somehow connected to the dial pointer.

Five Gang Cap
 

On 10/07/10 08:18, VK3XAO wrote:


Probably from a SCR-269 (BC-433) or ARN-7 Radio Compass. Loop, 2 RF,
Oscillator and Mixer tuning.

John Mackesy VK3XAO

John,

I found a picture of a SCR-263 at
http://www.fidnet.com/~seanbart/SCR-...-443-A_Top.jpg This is the cap but
with a forward facing cable connector for the drive cable.


Charlie.

--
M0WYM
www.radiowymsey.org

Sales @ radiowymsey
http://shop.ebay.co.uk/gnome7763/m.html?

Five Gang Cap
 

On 11/07/10 18:51, Kenneth Scharf wrote:

The capacitor has a second gear driving a sliding rod, probably used to
move a dial pointer (see the two gears below the worm gear?). I suspect
the radio was tuned via a motor connected via a spline to the worm drive
and the moving rod was somehow connected to the dial pointer.

See the pic at http://www.fidnet.com/~seanbart/SCR-...-443-A_Top.jpg , I
think the rod is there to act as a stop, there is a pin on the sliding
piece that hits another pin at each end of the lead screw and inhibits
rotation.


Charlie.

--
M0WYM
www.radiowymsey.org

Sales @ radiowymsey
http://shop.ebay.co.uk/gnome7763/m.html?

Five Gang Cap
 

On Jul 13, 6:54*am, M0WYM wrote:
On 10/07/10 08:18, VK3XAO wrote:



Probably from a SCR-269 (BC-433) or ARN-7 Radio Compass. Loop, 2 RF,
Oscillator and Mixer tuning.

John Mackesy VK3XAO

John,

I found a picture of a SCR-263 atwww.fidnet.com/~seanbart/SCR-263/BC-443-A_Top.jpg*This is the cap but
with a forward facing cable connector for the drive cable.

Charlie.

--
M0WYMwww.radiowymsey.org

Sales @ radiowymseyhttp://shop.ebay.co.uk/gnome7763/m.html?

Interesting. I restored a SCR-269 system in the early 80's and vaguely
remember the cap. SCR-269 Radio Compass/ADF (3 bands) and the very
similar AN/ARN-7 (4 bands, same frequency range) run from 28V DC
and115V 400 Hz AC and are recognizably from the same stable as the
SCR-263 (and the earlier MN-26). B+ is generated by a transformer/
rectifier - 5Z4? - also 48V AC for the indicator system. The SCR-269
was good performer but had endless capacitor failures. Anyplace there
was a capacitor with B+ on one side and a ground or a grid on the
other was a problem.

Current equipment is a '50s AN/ARN-6, still looks similar to the
earlier Bendix ADF's. Best of all, the ARN-6 uses +28V on the plates.

John VK3XAO

Five Gang Cap
 

On 07/12/2010 04:59 PM, M0WYM wrote:
On 11/07/10 18:51, Kenneth Scharf wrote:

The capacitor has a second gear driving a sliding rod, probably used to
move a dial pointer (see the two gears below the worm gear?). I suspect
the radio was tuned via a motor connected via a spline to the worm drive
and the moving rod was somehow connected to the dial pointer.

See the pic at http://www.fidnet.com/~seanbart/SCR-...-443-A_Top.jpg , I
think the rod is there to act as a stop, there is a pin on the sliding
piece that hits another pin at each end of the lead screw and inhibits
rotation.


Charlie.

That would have been my second guess. The 5 tie plates holding the
rotor plates together binding against the stator plates would have
worked as a stop (that's how MOST caps work), but might not be a good
idea in a motor driven tuner.