So the new radios have a built in failure mode that the "boat anchors" did not?
That's unnerving?
73 de W6OGC Jim Allen
Sent from my iPad
> On Jul 6, 2015, at 10:25 AM, A R <raf_3@msn.com> wrote:
>
>
> Welcome to the lead-free world of RoHS. Your spools of 60/40 solder are NOT
> RoHS-compliant...but will likely improve reliability of solder connections
> which are subjected to the stresses of expansion/contraction of dissimilar
> materials due to thermal excursions. Sn-Pb is more ductile, and as a result
> more tolerant of the thermal excursion stresses, than the RoHS-compliant
> solders.
>
>
>
> 73,
>
> Allen--W7GIF
>
>
> ----- Original Message -----
>
> From: Jim Allen<mailto:jim.allen@longhornband.net>
>
> To: Discussion of Ten-Tec Equipment<mailto:tentec@contesting.com>
>
> Sent: Monday, July 06, 2015 5:46 AM
>
> Subject: Re: [TenTec] Omni 6 Plus: No RX or TX on 10 meters (Intermittent)
>
>
>
> I'm glad you found the fix.
>
> Why is it there are so many re-solder fixes these days. I don't recall ever
> hearing about resoldering on the old gear. Anybody ever have to fix a 75A4
> or SX101, etc. by resoldering some connections?
>
> 73 de W6OGC Jim Allen
>
> Sent from my iPad
>
>> On Jul 6, 2015, at 7:39 AM, Joe Papworth via TenTec
>> <tentec@contesting.com<mailto:tentec@contesting.com>> wrote:
>>
>> It appears to be fixed and in repairing it, I fixed another annoying
>> problem, which was spurs and floaters on ten meters only. Those had been
>> plaguing me for several years.
>>
>>
>> First, thanks to Paul at Ten Tec for pointing me in the right direction and
>> to Mark, K8VF, and others for their suggestions.
>>
>>
>> Paul was right. The problem was on the Xtal Osc/LO board. The repair process
>> went like this:
>>
>>
>> 1) I looked at the schematic of the board and saw there are 4 separate xtal
>> ? ? oscillators for ten meters (I assume one for each 500 Khz band segment)
>> ? ? Since I was losing the entire band, I knew it wasn't one of those
>> circuits.?
>> ? ? That eliminated a lot of circuitry as a possible cause.
>>
>>
>> 2) After reading the theory of operation, I pretty much narrowed things down
>> ? ? to the L9, L10, and L11 circuits, plus the Q4 and Q5 circuits.
>>
>>
>> 3) I resoldered every component in those areas and voila, no more spurs or
>> ? ? floaters and so far, RX and TX are fine. (I'm fairly certain the rig
>> would
>> ? ? have failed?by?now)
>>
>>
>> Later, Joe
>>
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