Baking caps in the tuner box oven Mitch???
Mike
WE0H
----- Original Message -----
From: Mitch Powell
Sent: Sunday, December 18, 2005 1:33
PM
Subject: LF: MP 137
Greetings:
MP ( 137776.8 ) spent the last few days
re-building loop tuning
unit - after demise of one of the tuning
capacitors.
Capacitor removed from old TU ( BC375 ) tuning units -
0.01 uF
Sangamo 5000 Test Volt - still working to a degree - but
antenna
current dropping slowly over a month period from 6
Amps to 3 amps.
Inspected capacitor and found unknown substance
oozing from sides and the
colour of the capacitor changed from
light brown to deep black.
The
other indication was the change in the DC current at the transmitter -
key
down at beginning of QRSS30 was approx 4 amps slowly increasing
to 9 amps
over the 90 second key down period.
I have replaces all the capacitors,
retuned, and all appears well - with
instant DC transmitter current - and a
full 7 AMP of RF current at the
loop.
Observing the signal at W3EEE
( thanks Steve ) at mid-day.... and
have gained mucho dB at his receiving
site.
Frequency appears to be 137776.8
Temp -5C, snow
approx 45cm ( 18" ) on ground.
Mitch VE3OT
