[TenTec] Omni 6 Plus: No RX or TX on 10 meters (Intermittent)

[k8mp at aol.com]

Oops... I see you already answered my Pub question Allen. But I wonder if my 18 year old Omni 6 Plus is RoHS compliant.

Sent from AOL Mobile Mail


-----Original Message-----
From: A R <raf_3 at msn.com>
To: Discussion of Ten-Tec Equipment <tentec at contesting.com>
Sent: Mon, Jul 6, 2015 11:25 AM
Subject: Re: [TenTec] Omni 6 Plus: No RX or TX on 10 meters (Intermittent)



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<pre style="font-size: 9pt;"><tt>
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<<a href="mailto:jim.allen at longhornband.net?">mailto:jim.allen at longhornband.net</a>> 

To: Discussion of Ten-Tec
Equipment<<a href="mailto:tentec at contesting.com?">mailto:tentec at contesting.com</a>> 

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
<<a href="mailto:tentec at contesting.com">tentec at contesting.com</a><<a href="mailto:tentec at contesting.com?">mailto:tentec at contesting.com</a>>> 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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