Installation Comments shared by Terry K9TW
A special thanks to Terry for his valuable support and comments:
I have just had an opportunity to get my hands on the newly designed and
manufactured upper chain drive sprockets for the TS530 and TS830 rigs. Those of
you who own or work on these rigs know that the original white nylon sprockets
crack at the set screw tapped holes and if bad enough can allow the three air
variable capacitors to get out of sync that among other things causes the ALC
indication to get touchy and RF drive to be less than ideal.
Gregory NR6C has manufactured these beautiful replacements using a 3D printing
process and is now offering them for sale on his website. Go to WWW.NR6C.COM and
click on the link to see the design story and place an order for your sets.
I
have installed a set in one of my TS-830 radios and they work just fine. The
install is easy. Just take a digital picture of the original installation. Mesh
the plates fully which should bring each chain tensionsers up to within one link
of engaging the sprocket teeth. Loosen the 4 screws on the brass coupler and
slide it back. Now you can grasp the drive shaft with the cracked sprockets and
dis-engage it from its bearing stanchions on each end. Now you can remove the
chains and the old sprockets ( assuming previous owner didn't attempt JB Weld or
Epoxy repairs). Use a jewelers file and clean the burrs off the shaft where the
old set screws seated. You can also lightly polish the shaft with crocus cloth
or fine sandpaper. Now just slip on three new sprockets and reverse the
assembly. Make sure that all plates are fully meshed and when you move the Drive
control knob that they all open simultaneously. They may not if someone has
stretched out the chain tensioners. With the knob at 1200 position all three
capacitors should be 50% open.
I
want to thank Gregory for his efforts. When I hold these in my hand it is hard
to believe how quickly from the idea to actual production this has happened. In
my day the draftsman would still be sitting at his drafting board working on the
hand drawn engineering drawing.
Check with Greg regards availability and shipping. He has set the price very
reasonable. Looks to me like it is just a labor of love to help our members keep
these treasures on the air without resorting to bubble gum and baling wire!
73s
Terry
K9TW