Heath Ham radios

[JF]

On 9/19/05 Greg Boye wrote on the Heath List:

>Hi everyone..
>I know that this was discussed about a year or two ago but I didn't
>need this info at the time but I do now.  Could someone tell me where
>to purchase the conductive gease that is used in the Heath tuning
>capacitors?
>My SB-303 VFO now has the "wobbles" and its very hard to tune in SSB
>signals as it jumps around in frequency.
>Thanks,
>Greg W8NGA



A Google search with keyword combination "conductive grease" will result
in a lot of hits like  "Silver Filled Conductive Grease"  at

http://www.2spi.com/catalog/vac/silver-filled-grease.shtml

Expensive stuff, about $40 for a 6.5 oz tube. There are also other
kinds like carbon-filled grease, but don't use that For VFOs - be sure
to get the silver-filled kind. I don't know how well the above stuff
will work on your VFO;  you might want to read the descriptions of
other products found via Google.

An alternative to disassembling the VFO for access to the lube point
is to solder on a flexible conductor as outlined in a 2003 post by
fellow Greenie Mark V. Johnson:

 >I've tried to fix this problem in different ways on many LMO's over
 >the years. Putting more tension on the "wiper", removing the variable
 >cap and thoroughly cleaning the bearings etc. Only sure fix for me was
 >to neatly solder a small piece of braid (copper) to the actual variable
 >cap shaft, and then soldering the other end to gnd. I leave enough
 >braid for "windup" as the rotor is turned through its 180 degrees. I've
 >done this on SB-100's, 101'2 and 102's and my SB-104's. Its been a
 >solid fix for me and ends this problem for good. To solder the braid to
 >the shaft, I file a clean section and use a small but HOT soldering
 >iron. Fastens itself with no problem.

73

John   KE5ZB

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