[Central-Electronics] 100V VFO help

[Bob Sullivan]

Jon,

On my site are detailed photos of rebuilding the VFO - it will help you 
with replacing the bearings.
Visit: http://www.isquare.com/personal_pages/ce-pto-rebuild.htm

Use Teflon grease - available from any auto parts store.

You should definitely replace the bearings! They are available from A&W 
Bearings & Supply, 800 535 9638; www.bearingplace.com; You want FAF model 
S3KDD - around $8 each. (You need two).

The mess you found was CE's attempt to help with temp control and VFO 
stability. Clean it out (best you can) and replace with some soft foam. 
(check at packing supply distributor or furniture repair shop).

Don't mess with the electronics unless something doesn't work!

Call me if I can help. I have rebuild a bunch of these.

This might be useful as well:
http://www.isquare.com/personal_pages/ce-hvcap-replacement.htm

73, Bob
WØYVA
My station: http://www.isquare.com/personal_pages/hardware-14.htm




At 09:53 AM 10/13/2004, K6JEK wrote:
>Thanks to Nick Tusa's excellent instructions,  the VFO is out and sitting 
>on the workbench.  But it is presenting challenges I wasn't expecting: 
>foam, grease, ball bearings, caps & resistors.
>
>The slug is badly misaligned with the coil form. It is almost 
>immobilized.  I intend to follow Nicks instructions to re-align it.
>But when I removed the back cover to have a look I discovered a mess. The 
>foam that lines the inside cover has disintegrated filling the inside with 
>a grainy powder.  Does anyone have a suggestion for replacement material 
>for this foam?
>
>Today I hope to disassemble the actuator, clean out the dried grease, 
>re-pack, and re-assemble.  I plan to use a mix of Radio Shack Gel Lube and 
>synthetic oil.  Bill, N6PY, believes this Radio Shack lube is high temp 
>Teflon grease.  Can anyone confirm this or give me a different source for 
>Teflon grease?
>
>I would like to replace the bearing assemblies if I can instead of just 
>cleaning them. Does anyone know a source for small bearing assemblies?
>
>And how about the caps & resistors in the VFO itself? I didn't intend to 
>go through the VFO electrically but there the parts are sticking out like 
>a sore thumb.  Should I resist the temptation to check caps & resistors or 
>are there a few that I should really go after?
>
>OK, OK, I'll stop asking questions.
>
>Thanks,
>
>Jon, K6JEK
>
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