01-08-2019, 12:48 AM
OK - Once more unto the breach, dear friends...
RF Subchassis
Step 1 - Label and Desolder Connections to RF Subchassis
[Image: https://farm8.staticflickr.com/7875/3169...1e57_z.jpg]
[Image: https://farm5.staticflickr.com/4862/3169...10ae_m.jpg] [Image: https://farm8.staticflickr.com/7847/4572...5ef9_m.jpg]
[Image: https://farm8.staticflickr.com/7809/4658...f8f6_m.jpg] [Image: https://farm8.staticflickr.com/7906/4663...d3cb_m.jpg]
[Image: https://farm5.staticflickr.com/4835/3967...29b0_m.jpg] [Image: https://farm8.staticflickr.com/7886/4572...a40a_m.jpg]
[Image: https://farm8.staticflickr.com/7851/3169...6363_m.jpg] [Image: https://farm5.staticflickr.com/4888/4658...9db3_m.jpg]
Step 2 - Remove Lights and Front Panel
[Image: https://farm5.staticflickr.com/4913/4658...d5cd_z.jpg]
[Image: https://farm5.staticflickr.com/4887/4658...3d7a_z.jpg]
[Image: https://farm8.staticflickr.com/7801/4658...b081_z.jpg]
Step 3 - Remove RF Subchassis
Remove the screw at the back of the RF subchassis.
[Image: https://farm8.staticflickr.com/7922/4591...2c02_z.jpg] [Image: https://farm8.staticflickr.com/7852/4658...50f5_z.jpg]
Now carefully (!) tilt the whole thing forward.
[Image: https://farm8.staticflickr.com/7809/4591...0310_z.jpg]
[Image: https://farm5.staticflickr.com/4817/3169...1109_z.jpg]
Step 4 - Remove Sides and Restuff Caps
[Image: https://farm5.staticflickr.com/4889/4591...4134_z.jpg]
On some of the RF subchassis sets the capacitors are so buried it's also necessary to slide out the shaft and work on each section individually.
Fortunately the 38-116 isn't quite that bad - all of the caps are accessible without fully disassembling the RF subchassis.
And don't forget this guy!
[Image: https://farm8.staticflickr.com/7870/4663...6025_z.jpg] [Image: https://farm8.staticflickr.com/7834/3169...b089_z.jpg]
Step 5 - Bandswitch
While I had everything apart I applied some DeOxit to the bandswitch contacts.
[Image: https://farm8.staticflickr.com/7872/3171...f1d1_z.jpg]
Step 6 - Back Together
[Image: https://farm5.staticflickr.com/4834/3969...93b5_z.jpg]
Reinstall the RF subchassis. I also replaced the rubber mounts using replacements from renovatedradios.com.
[Image: https://farm8.staticflickr.com/7882/4665...ecc3_z.jpg]
And resolder all those wires.
[Image: https://farm5.staticflickr.com/4845/3969...6a40_z.jpg]
Step 7 - Power Up
Reconnect the speaker, power it up....and....it works!
The bandswitch works much better.
The set is fully recapped now and is pulling in lots of stations but definitely will benefit from being realigned.
I probably should rebuild the linkage between the tuning condenser and the dial - it's quite stiff and unsymmetrical.
[Image: https://farm5.staticflickr.com/4917/3171...13f9_z.jpg]
There's also the mangled tube shield bases. Also need to clean and reinstall the dial.
And soak some parts in Evaporust.
[Image: https://farm8.staticflickr.com/7837/3278...4a1c_z.jpg]
RF Subchassis
Step 1 - Label and Desolder Connections to RF Subchassis
[Image: https://farm8.staticflickr.com/7875/3169...1e57_z.jpg]
[Image: https://farm5.staticflickr.com/4862/3169...10ae_m.jpg] [Image: https://farm8.staticflickr.com/7847/4572...5ef9_m.jpg]
[Image: https://farm8.staticflickr.com/7809/4658...f8f6_m.jpg] [Image: https://farm8.staticflickr.com/7906/4663...d3cb_m.jpg]
[Image: https://farm5.staticflickr.com/4835/3967...29b0_m.jpg] [Image: https://farm8.staticflickr.com/7886/4572...a40a_m.jpg]
[Image: https://farm8.staticflickr.com/7851/3169...6363_m.jpg] [Image: https://farm5.staticflickr.com/4888/4658...9db3_m.jpg]
Step 2 - Remove Lights and Front Panel
[Image: https://farm5.staticflickr.com/4913/4658...d5cd_z.jpg]
[Image: https://farm5.staticflickr.com/4887/4658...3d7a_z.jpg]
[Image: https://farm8.staticflickr.com/7801/4658...b081_z.jpg]
Step 3 - Remove RF Subchassis
Remove the screw at the back of the RF subchassis.
[Image: https://farm8.staticflickr.com/7922/4591...2c02_z.jpg] [Image: https://farm8.staticflickr.com/7852/4658...50f5_z.jpg]
Now carefully (!) tilt the whole thing forward.
[Image: https://farm8.staticflickr.com/7809/4591...0310_z.jpg]
[Image: https://farm5.staticflickr.com/4817/3169...1109_z.jpg]
Step 4 - Remove Sides and Restuff Caps
[Image: https://farm5.staticflickr.com/4889/4591...4134_z.jpg]
On some of the RF subchassis sets the capacitors are so buried it's also necessary to slide out the shaft and work on each section individually.
Fortunately the 38-116 isn't quite that bad - all of the caps are accessible without fully disassembling the RF subchassis.
And don't forget this guy!
[Image: https://farm8.staticflickr.com/7870/4663...6025_z.jpg] [Image: https://farm8.staticflickr.com/7834/3169...b089_z.jpg]
Step 5 - Bandswitch
While I had everything apart I applied some DeOxit to the bandswitch contacts.
[Image: https://farm8.staticflickr.com/7872/3171...f1d1_z.jpg]
Step 6 - Back Together
[Image: https://farm5.staticflickr.com/4834/3969...93b5_z.jpg]
Reinstall the RF subchassis. I also replaced the rubber mounts using replacements from renovatedradios.com.
[Image: https://farm8.staticflickr.com/7882/4665...ecc3_z.jpg]
And resolder all those wires.
[Image: https://farm5.staticflickr.com/4845/3969...6a40_z.jpg]
Step 7 - Power Up
Reconnect the speaker, power it up....and....it works!
The bandswitch works much better.
The set is fully recapped now and is pulling in lots of stations but definitely will benefit from being realigned.
I probably should rebuild the linkage between the tuning condenser and the dial - it's quite stiff and unsymmetrical.
[Image: https://farm5.staticflickr.com/4917/3171...13f9_z.jpg]
There's also the mangled tube shield bases. Also need to clean and reinstall the dial.
And soak some parts in Evaporust.
[Image: https://farm8.staticflickr.com/7837/3278...4a1c_z.jpg]