"Al Parker" <[EMAIL PROTECTED]> made an utterance to the drakelist gang
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hi Mark,
It's been a while since I've played with a TR-3, but your tr relay
operation sounds correct. It shouldn't operate in cal mode because you
don't want the xmtr on. It doesn't operate in SSB because it waits until
teh VOX or PTT operates it. It does operate in AM & CW, 'cuz thats the way
it does. In AM you want it to, in CW "they" want it to. It makes it
necessary to switch manually from xmt to rcv when operating CW, no QSK, not
even slowly. Different on CW in the TR-4's, but I think the same for other
modes.
73,
Al, W8UT
New Bern, NC
www.boatanchors.org
www.hammarlund.info
----- Original Message -----
From: "Mark Pilant" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Monday, January 14, 2008 6:46 PM
Subject: Re: [drakelist] TR-3 refurbishing
Mark Pilant <[EMAIL PROTECTED]> made an utterance to the drakelist
gang
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HI Carl.
> Yep, go to http://mysite.verizon.net/halo.net/ click projects
> ...TR3 relay same board
Looks nice. I'll definitely keep it in mind.
I finished another round of resistance measurements after cleaning
the relay contacts and they are now all reasonable; except for the
VFO pin 7; it still reads as open.
One thing I did notice was when I power up the TR-3, if the mode
switch is in either the CAL or SSB position, the T/R relay is not
energized. However, when I switch the mode switch to either CW or
AM, the T/R relay is energized. I haven't looked at the schematic
yet to see if I can puzzle this one out. (Although it may be
normal; this is all new to me :-)
73
- Mark N1VQW
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