: HAROLD SMITH JR w0ri...@sbcglobal.net; Shoppa, Tim
tsho...@wmata.com; n...@contesting.com; topband@contesting.com
Sent: Saturday, February 01, 2014 4:05 PM
Subject: Re: Topband: Submerging variable caps in oil as substituteforvacuum
variables
I was reading this thread and all the concerns
Dissipation factors for particular oils are found here:
http://www.icrepq.com/icrepq'12/538-toudja.pdf
I cannot comment on the accuracy of the data.
Terry K4RX
-Original Message-
From: Topband [mailto:topband-boun...@contesting.com] On Behalf Of Tom W8JI
The major issue with
: Bill Wichers bi...@waveform.net
To: Tom W8JI w...@w8ji.com
Cc: HAROLD SMITH JR w0ri...@sbcglobal.net; Shoppa, Tim
tsho...@wmata.com; n...@contesting.com; topband@contesting.com
Sent: Saturday, February 01, 2014 4:05 PM
Subject: Re: Topband: Submerging variable caps in oil as substituteforvacuum
:32 AM
Subject: Re: Topband: Submerging variable caps in oil as substituteforvacuum
variables
Still I am intrigued by the thought of a remote tuning capacitor via
hydraulic tubing :-). The capacitor plates could be as simple as two
concentric cylinder conductors with appropriate spacers. I
Sent: Thursday, January 30, 2014 11:32 AM
Subject: Re: Topband: Submerging variable caps in oil as substituteforvacuum
variables
That uses the thermal properties outside a resistor, not dielectric
constant properties in a capacitor :-).
Tim N3QE
- Original Message -
From: ZR [mailto:z
Very true but the RF is still in the oil dielectric from the coax
connector to the hot end of the resistor.
Not the same at all.
Loss tangent is meaningless in the dummy load application because impedance
is low (weak electric field). There is very little displacement current
compared to
