Hi Jon,
I'm not familiar with the Ten-Tec Titan amp, but try disconnecting pin 8
from pin 7.
Pin 8 is the cathode connection for the protection diode in the SDR's
ULN2003 driver chip (and actually pin 8 is a common-connection for the
cathodes of *all* the protection diodes in the ULN2003). It's
For completeness I should have added: you should only need to use two pins:
Pin 7 - connect to the Titan PTT connector center pin
Pin 15 - connect to Titan PTT connector ground.
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] Behalf Of Jeff Anderson
Sent:
Jon,
As Jeff said the pin 8 protection diode should not be needed for the
Ten-Tec Titan amp because of its transistor keying.
What is the other amp with the 12 volt DC relay? Does it have a back or
protection diode across the relay coil inside the amp? If it doesn't
have a back diode then
a future issue also.
73
Zack Schindler
N8FNR
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At 07:49 PM 10/3/2006, Frank Brickle wrote:
Barry Jablonski wrote:
The NYC stations are bombarding my QTH
with kilowatts of AM HD radiation --
why is it that, I, as an experimenter/hobbiest can't decoded their
freely radiated signals? I think that the protocols
are in the public
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Archive Link: http
From ED
The connection for the second amp, not the TT Titan, should be as follows;
The 12VDC line for the relay should go to pin 7 of X2. The ground should
connect to pin 15 of X2. Connecting pin 7 and 8 together should not be done.
Pin 8 should go directly to the +12 VDC source. With 7 8 tied
Though you might enjoy this piece.
The Top 10 Reasons not to buy a FlexRadio SDR-1000
10. You have a knob, button and switch fetish.
9. The excitement of owning a radio that constantly
gets better might cause you to have a heart attack.
8. You don't need a radio that can double as a
This is confusing to me. My kw's big 112 volt ac clapper relay is keyed
by an ice cube relay (12volt dc at apx 50ma.). The (+) lead from the 12
volt supply goes to the bottom of the ice cube relay coil. The (-) lead
from the supply is grounded. I key the kw by shorting the top lead from
the
Dave,
The pin 8 diode connection should go to the (+) side of the power supply
which in your description is also the bottom of the ice cube coil. The
top of the coil goes to pin 7. This puts a diode across the coil with
its cathode to the (+) side and the anode to the (-) side of the coil
And, YES, pin 15 is the ground, (-) of the 12 volt supply.
Dave,
The pin 8 diode connection should go to the (+) side of the power supply
which in your description is also the bottom of the ice cube coil. The
top of the coil goes to pin 7. This puts a diode across the coil with
its
Hello, Jim and Frank,
I appreciate your through and scholarly response to my simply
questions. Having practiced EE for more than thirty
years now, I am fully aware and respect the patent system. Most of my
employers would give you a letter of
appreciation and maybe even a plack (sometimes
Barry Jablonski wrote:
I guess that my simple question is: how is iBiquity Digital
different
than DRM? With DRM (an international digital
standard) I can buy (as I have...) their official decoder --
--
From
At 07:35 PM 10/4/2006, Barry Jablonski wrote:
Hello, Jim and Frank,
I appreciate your through and scholarly response to my simply
questions. Having practiced EE for more than thirty
years now, I am fully aware and respect the patent system. Most of my
employers would give you a letter of
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