[ARC5] Crummy Grounds

[David Stinson]

An example of what, in my experience, is becoming
as
big a problem for Boatanchor and Mil-Radio folks
as are old capacitors: Hi-Z Grounds.

Filaments wouldn't light on a BC-230 transmitter.
The bottom pin on the connector should be at 
chassis ground. A wire runs from that pin to a
ground lug at one of the connector mounting
screws.
Measurement from the pin to chassis was 37 Ohms-
more than enough to drop all that filament
Voltage.
A drop of De-Ox-It ( "a little dab'll do ya") and 
a quarter-turn of the connector mounting screws-
 loose, then tighten- and no more crummy ground.

Also, this one had the "riveted tube pin" problem.
A drop of De-Ox-It on each tube pin rivet, insert
the
tube and work it gently back-and-forth to flex the
rivet connections, and the transmitter is now
working.

GL OM ES 73 DE Dave AB5S

-------------- next part --------------
A non-text attachment was scrubbed...
Name: CrummyGnd.jpg
Type: image/jpeg
Size: 51189 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20190318/58ad1d39/attachment-0002.jpg>
-------------- next part --------------
A non-text attachment was scrubbed...
Name: NiceGnd.jpg
Type: image/jpeg
Size: 51121 bytes
Desc: not available
URL: <http://mailman.qth.net/pipermail/arc5/attachments/20190318/58ad1d39/attachment-0003.jpg>