Nice guess but I don't think so.
The switch works on one band but not on the next.
The bandswitch does not switch anything that has to do with mode, at least
not that I can see.
With the mode switch in SB-R on 80, it is in LSB.
When I switch to 40m it is in USB. I have to turn the mode switch to SB-N
in order to hear normal LSB signals.
73 - Rick, DJ0IP
(Nr. Frankfurt, Germany)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Tim
Sent: Monday, September 05, 2016 5:03 PM
To: Discussion of Ten-Tec Equipment
Subject: Re: [TenTec] ARGONAUT 515 problem
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
>>>
>>> _______________________________________________
>>> TenTec mailing list
>>> TenTec@contesting.com
>>> http://lists.contesting.com/mailman/listinfo/tentec
>>>
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