Hi Rick,
This now sounds like a dirty switch contact.
Tim
KE4KE
On 09/05/2016 09:58 AM, rick@dj0ip.de wrote:
I haven't taken the radio apart yet, Lee.
Yes, the LSB pin has a direct connection to +12v through a pull-up resistor,
and the mode switch grounds the pin for SB-R.
Last time I worked on Argonauts I had a scope, VTVM, signal generator, freq.
counter, etc.
Today I only have a DVM and a freq. counter.
What's blowing my mind is that it works normal on 40m and reversed on 80m.
I can't see how the band would have anything to do with it.
I can borrow a scope from our ham club and perhaps use a QRP rig as a signal
generator.
I need to check how high the impedance is on my DVM. Dunno if I can use
that instead of a VTVM or not.
There's always a reason and once you find it, it usually makes sense. Right
now it makes no sense to me.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Lee
Sent: Monday, September 05, 2016 4:49 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] ARGONAUT 515 problem
Congratulations on getting a 515 Rick. Bet you'll have lots of fun
with that radio.
You are correct about leaving the mode switch in "Normal" position on all
bands normally...hehe.
You probably found the problem by now but if not, check the voltage at "LSB"
on the SSB GENERATOR board. It should be a positive voltage in "NOR" mode
and ground in "REV" mode. Doesn't look to me like that changes on any band.
73,
-Lee-
------ Original Message ------
From: "rick@dj0ip.de" <Rick@dj0ip.de>
To: n4py3@earthlink.net; "'Discussion of Ten-Tec Equipment'"
<tentec@contesting.com>
Sent: 9/5/2016 8:14:20 AM
Subject: Re: [TenTec] ARGONAUT 515 problem
Gm Carl,
It's the other way around by me. I leave it in "Normal" for all bands
except 80m. On 80 I have to switch to Reverse. I have owned 4 pyjrt
Argonauts including one other 515 and none of them worked like this.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Carl
Moreschi
Sent: Monday, September 05, 2016 1:52 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] ARGONAUT 515 problem
Rick, I think this is normal. The mixing scheme works such that LSB
comes out as normal on 80 meters. I seem to recall that my Omni A
worked the same way. I think they use the same crystal for 20 and 80
meters to get to the IF and this yields USB on 20 meters and LSB on 80
meters.
Carl Moreschi N4PY
58 Hogwood Rd
Louisburg, NC 27549
www.n4py.com
On 9/4/2016 10:51 PM, rick@dj0ip.de wrote:
Meanwhile, back at Ten-Tec . . .
I have just received an Argonaut 515 in fairly good shape, just
needing a tune-up.
However it does have one minor issue which has me stumped.
On 80m I could hear lots of strong signals but all sounding like
Donald Duck.
I switched to SB-R which should normally place the rig in USB mode
and
everything worked just fine.
On 40m, and all other bands, I switch back to SB-N and everything is
fine.
I haven't checked transmit yet to see if the wrong mode is only
selected in RX or if it is also during TX.
What is curious to me is, the mode switch is labeled for SB-Normal
and
SB-Reverse, yet the signal input to the SSB generator board for
switching these is simply called LSB.
What I am unable to find is how the position of the bandswitch can
pass a signal through the mode switch to tell it when to enable or
disable this LSB line. That must be the source of the problem.
I believe this is very similar to the Triton IV so perhaps someone
with that radio understands how this works.
Tnx.
73
Rick, DJ0IP
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