Did you guys have solder back then, Jim?
;-)
73 - Rick, DJ0IP
(Nr. Frankfurt am Main)
-----Original Message-----
From: TenTec [mailto:tentec-bounces@contesting.com] On Behalf Of Jim Allen
Sent: Monday, July 06, 2015 2:47 PM
To: Discussion of Ten-Tec Equipment
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> 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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