[TenTec] ARGONAUT 515 problem

[Lee]

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 at dj0ip.de" <Rick at dj0ip.de>
To: n4py3 at earthlink.net; "'Discussion of Ten-Tec Equipment'" 
<tentec at 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 at 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 at 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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