I have to put ptt into a friend's DX60. I did Bob's -K4TAX audio mods and have gotten very nice reports using D104.
From what I can tell from schematic of function switch, I need to key B+ So looks to me like I can just put NO relay contact in series with B+. DX60 just stays in AM position and relay does it all. He is using outboard HG-10B vfo as well which runs off of 300v B+.
I also have to key TR relay and some kind of receiver mute. And he also needs a contact close for his Keenwood leanyar.
What's the game plan for this sorta thing? One big relay with lots of poles or relay a drives relay b and so forth?
And I don't understand why vfo is keyed on these old boatanchors. Won't it drift for a few seconds after ptt while it warms up?
73
NEO
Hi N9NEO,
The DX-60 is one of the most "easy" transmitters to incorporate
PTT.
You do not even need to "dig into" the xmtr as I have done PTT
on mine using an "external" relay box with a couple 12vdc relays
which are "activated" by my D-104 microphone.
the relays simply switch the ant from rcvr to xmtr, and I also
have a set of contacts "in series" with the normally closed key
jack on the front of the transmitter which just "keys" or "unkeys"
the xmtr.--You dont even need to get into the rig to mess with
the B+, and this "scheme" works great.
If you want, --I will mail you a small print , if ur address is ok
on QRZ.com.
73`s, Rene, K1MVP :-P
P.S., depending on how many "functions" u want,--such as rcvr
muting, etc, etc, u just can add an additional 12vdc relay
in the "external" PTT relay box es away u go.