m] On Behalf Of Thomas Oliver
Sent: Saturday, April 18, 2009 9:59 PM
To: Repeater-Builder@yahoogroups.com
Subject: Re: [Repeater-Builder] Re: MASTR II PTT
This the circuit I have always used to key a Mastr II with cos voltage
source inside the Mastr II.
It requires a positive going voltage t
This the circuit I have always used to key a Mastr II with cos voltage
source inside the Mastr II.
It requires a positive going voltage to key the Mastr II I know +7.5 volts
works with the values listed.
tom
<>
.com
> <mailto:Repeater-Builder@yahoogroups.com>
> *Sent:* Saturday, April 18, 2009 6:05 PM
> *Subject:* RE: [Repeater-Builder] Re: MASTR II PTT
>
> With the simple echolink interace which has a NPN transistor doing
> the switching the voltage across the P
r-Builder@yahoogroups.com
Sent: Saturday, April 18, 2009 6:05 PM
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
With the simple echolink interace which has a NPN transistor doing the
switching the voltage across the PTT line and ground is 7v when the com port is
not active and 6.5v when its acti
ups.com
Sent: Saturday, April 18, 2009 6:05 PM
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
With the simple echolink interace which has a NPN transistor doing the
switching the voltage across the PTT line and ground is 7v when the com port is
not active and 6.5v when it’s active
oogroups.com] On Behalf Of Vernon Densler
Sent: Saturday, April 18, 2009 3:06 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
With the simple echolink interace which has a NPN transistor doing the
switching the voltage across the PTT line and ground is 7v wh
Say what?
Sent on the TELUS Mobility network with BlackBerry
-Original Message-
From: "Vernon Densler"
Date: Sat, 18 Apr 2009 18:05:35
To:
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
With the simple echolink interace which has a NPN transistor doing the
switching t
: RE: [Repeater-Builder] Re: MASTR II PTT
OK. I am at my whit’s end here. The transistor won’t bring the PTT line down
enough to trigger. The optoisolator won’t either. The mechanical relays can’t
be latched by the com port. The SSR latches but won’t unlatch with DC. So do
I run the
] On Behalf Of Ralph Mowery
Sent: Friday, April 17, 2009 5:56 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
You probably overlooked the simple thing. The PTT line is DC and once the SCR
fires it will latch. If you had AC then the voltage goes to
You probably overlooked the simple thing. The PTT line is DC and once the SCR
fires it will latch. If you had AC then the voltage goes to zero and the SCR
unlatches.
--- On Fri, 4/17/09, Vernon Densler wrote:
From: Vernon Densler
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
To
I got a Solid State Relay and the com port will trigger it. (same thing I use
to control my Christmas lights from my computer). However for some reason the
PTT won’t drop when the SSR shuts off. I know there is some voltage bleed on
them but I can’t figure out why it would stay grounded after
does the relay have a diode installed across the coil ?
is it the correct polarity ?
on Densler
Sent: Thursday, April 16, 2009 8:45 PM
To: Repeater-Builder@yahoogroups.com
Subject: RE: [Repeater-Builder] Re: MASTR II PTT
I tried my normal echolink circuit but it won't kick the PTT on the MII.
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogrou
I tried my normal echolink circuit but it won't kick the PTT on the MII.
From: Repeater-Builder@yahoogroups.com
[mailto:repeater-buil...@yahoogroups.com] On Behalf Of wb8art
Sent: Thursday, April 16, 2009 7:59 PM
To: Repeater-Builder@yahoogroups.com
Subject: [Repeater-Builder] Re: MAS
Vern, If your relay coil doesn't draw very much current it probably would
work. I would say using a opto isolator or minumum a transistor switch would
be a more practical method. I use a simple 2n transitor to fire a MII for
echolink.
Randy
--- In Repeater-Builder@yahoogroups.com, "Ve
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