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Echo Flag : Permanent: N Export: N Personal Read: N
BBS: SWEDX Conference: SHORTWAVE Imported: 2/21/1993
To: ALL Num: 9311 Date: 2/18/1993
From: REID KELLY Re: Time: 11:05 am
Subj: New Antenna Tuner Prvt: N Read: N
Hello Wayne!
Friday February 12 1993, Wayne Sarosi writes to John Mudge:
This is also worth asking for comments on. Here
is a test case, though. It is a simple Pi-network antenna tuner for MF/HF
receiving applications. Still a bit crude, but better than straight ascii
characters. Also I would very much like to hear comments from all readers one
way or the other in regard to using hi-bit ascii for purposes of diagramming
things. I am not in any manner advocating their use for cosmetic signatures,
etc.
===========================================================================
MF/HF PI-NETWORK RECEIVER ANTENNA TUNER
===========================================================================
.01 mf L1
TO RCVR >**************************************************< TO ANT
* * > * *****
365 ***> ***>365 < 1 Meg *** ***
pf *** *** pf > 1/2 W ***** *
* * < 1N914A *
TO GND >**************************************************< TO GND
NOTE: L1 will vary in size depending on frequency range desired.
NOTE: Voltage rating of components is not critical for receiving
applications.
NOTE: Connectors should be good quality coax connectors.
NOTE: Use a good earth ground, not water pipes.
NOTE: Tuner should be constructed in a shielded housing.
NOTE: 1 Meg resistor is for static discharge.
NOTE: Back to back 1N914 diodes protect against strong local
signals such as a transmitter in close proximity.
===========================================================================
John Mudge
-!- FMail 0.92
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